Abstract

The present disclosure relates to a maglev bogie, in particular to a maglev bogie with a centering function and a guiding method thereof. The maglev bogie comprises a maglev guide frame, crank arm brackets, guide wheels, first onboard magnet groups and cylindrical gears, wherein the crank arm brackets are hinged to the four corners of the top and bottom of the maglev bogie, the guide wheels are rotatably connected to the ends of the crank arm brackets, two first onboard magnet groups are slidably connected to each of the two inner sides of the upper part of the maglev guide frame, some of the cylindrical gears are connected to the top of the maglev guide frame where the upper crank arm brackets are hinged, two of the cylindrical gears are rotatably connected to each of the two sides of the top of the maglev guide frame, and every two adjacent cylindrical gears are meshed with each other. With the arrangement of the crank arm brackets, the guide wheels and the cylindrical gears, when the guide wheels on one side is squeezed by overhead track beam and displaced, the guide wheels on the other side can be synchronously driven to displace, so as to ensure a centered state of the maglev guide frame, the first onboard magnet groups, the overhead track beam and beam-borne magnetic track.

IPC Classes  ?

• B61F 5/52 - Bogie frames
• B61F 3/00 - Types of bogies

Abstract

The present disclosure relates to a neodymium-iron-boron substrate and a preparation method for a neodymium-iron-boron magnet. The neodymium-iron-boron substrate is in a sintered state, wherein a difference between the area fraction of a grain boundary parallel to the easy-to-magnetize direction of the substrate and the area fraction of a grain boundary vertical to the easy-to-magnetize direction is less than or equal to 1%. In the embodiments of the present disclosure, the neodymium-iron-boron substrate of the present disclosure is obtained by sintering a powder composition, which is obtained by mixing a raw neodymium-iron-boron alloy powder with an alloy powder consisting of R and M, wherein the mass ratio of R to M is x:(100-x), R is one or more of Nd and Pr, M is one of or a combination of two or more of Cu, Al, Ga and Zn, x is the mass fraction of R, and 0

IPC Classes  ?

• H01F 1/057 - Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B

Abstract

The present disclosure relates to a powder composition and a method for preparing a neodymium-iron-boron magnet. The composition comprises a first powder component and a second powder component, wherein the first powder component is alloy powder composed of R and M, the mass ratio of R to M is x: (100-x), R is one or more of Nd and Pr, M is one or a combination of two or more of Cu, Al, Ga and Zn, x is the mass fraction of R, and 0≤x≤90; and the second powder component is raw material neodymium-iron-boron alloy powder. According to the embodiments of the present disclosure, the powder composition of the present disclosure is suitable for preparing a base material having smaller heavy rare earth diffusion anisotropy, so that the powder composition can be used for further manufacturing a rare earth permanent magnet material having excellent performance.

IPC Classes  ?

• H01F 1/057 - Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B

Abstract

The present disclosure relates to the technical field of the permanent-magnetic track, and discloses a magnetic track module, a composite permanent-magnetic track and an installation method thereof. The magnetic track module comprises: at least two layers of magnetic units that are staggered in the first direction and stacked in the second direction with the same magnetization direction, wherein each magnetic unit is formed by a plurality of closely-arranged permanent magnets; and a bottom ferromagnetic plate that covers the lower surface of the bottom magnetic unit, with an attractive magnetic force existing between the bottom ferromagnetic plate and the adjacent magnetic unit.

IPC Classes  ?

• E01B 25/30 - Tracks for magnetic suspension or levitation vehicles

Abstract

A depth-stage dependent and hyperparameter-adaptive lightweight CNN-based model, named Faster R-Stair, which relates to the field of concrete crack detection technology. The structure of the backbone in this model is depth-stage dependent, which includes suitable structures in different depths. The backbone is also hyperparameter-adaptive. The basic components in different depths of the backbone have variations according to the adjustment of some hyperparameters. The proposed model in this embodiment has the advantages of high convergence speed in training, fast detection speed and high accuracy when used in crack detection.

IPC Classes  ?

• G06V 20/10 - Terrestrial scenes
• G06N 3/0464 - Convolutional networks [CNN, ConvNet]

Abstract

A three-stage modularized convolutional neural network (CNN) called Stairnet is disclosed for efficient classification of concrete cracks in images. Unlike traditional CNNs which exhibit similar structural characteristics in each layer, Stairnet is composed of three distinct parts: stair1, stair2, and stair3, each possessing its own unique structural characteristics. Stair1 exclusively consists of convolution layers, while stair2 incorporates a greater number of layers. Stair3, on the other hand, utilizes larger expansion factors and kernel size. Stair1 and stair2 exhibit various variations that result in their modification alongside certain parameters of Stairnet. In contrast to traditional CNNs utilized for the classification of thousands of classes, Stairnet stands out with its smaller model size, faster training speed, and high accuracy in classifying concrete cracks.

IPC Classes  ?

• G06V 10/764 - Arrangements for image or video recognition or understanding using pattern recognition or machine learning using classification, e.g. of video objects
• G06T 7/00 - Image analysis
• G06V 10/77 - Processing image or video features in feature spacesArrangements for image or video recognition or understanding using pattern recognition or machine learning using data integration or data reduction, e.g. principal component analysis [PCA] or independent component analysis [ICA] or self-organising maps [SOM]Blind source separation
• G06V 10/774 - Generating sets of training patternsBootstrap methods, e.g. bagging or boosting
• G06V 10/82 - Arrangements for image or video recognition or understanding using pattern recognition or machine learning using neural networks

Abstract

An implementation for a splay state based on amplitude envelopes in the coupled oscillator system includes introducing a heterogeneous oscillator into the globally coupled identical oscillator network, when the frequency mismatch and repulsive coupling strength of the coupled heterogeneous oscillator system satisfy a certain relationship, the time series of the coupled oscillator will modulate an amplitude envelope, which can realize the generation of splay states between the amplitude envelopes of the identical oscillators except for the heterogeneous oscillator; applying the polar coordinate transformation and perturbation analysis in the condition of small coupling strength, it is easy to obtain the evolution equation of the amplitude envelope from the coupled heterogeneous oscillators. Solving the evolution equation of the amplitude envelope, the average amplitude, amplitude, and other parameters of the amplitude envelope in the splay state can be theoretically determined.

IPC Classes  ?

• G06F 30/20 - Design optimisation, verification or simulation
• H03L 7/00 - Automatic control of frequency or phaseSynchronisation

Abstract

The present application provides a vibration test bench for a permanent maglev train, which comprises: a base, a vertical excitation system, a permanent magnet track simulation system, a gantry-type supporting frame, a suspension platform, a lateral excitation system and a longitudinal excitation system. In the present application, the positional relationship among the levitation frame of the permanent maglev train, the suspension platform and the permanent magnet track simulation system is adjusted by means of the vertical excitation system, the lateral excitation system and the vertical excitation system respectively, the permanent maglev train is maintained in the levitated state by means of the permanent magnet track simulation system, and a variety of the working conditions, such as unsmooth passing on the track, etc., are simulated by means of the vertical excitation system and the lateral excitation system respectively. The vibration test bench for a permanent maglev train in the present disclosure can be used to test the dynamic performance of a permanent maglev train in a freely levitated state, and further can test the dynamic performance of train-track coupling, and has a wide application range.

IPC Classes  ?

• G01M 17/10 - Suspensions, axles or wheels
• B61B 13/08 - Sliding or levitation systems

Abstract

An evaluation method for corrosion damage evolution of underwater concrete structures includes performing the time reversal test on the concrete beam specimen placed in the water, performing the uniaxial compression test on the concrete cube specimens; immersing the concrete beam specimen and the concrete cube specimens in a hydrochloric acid solution, and performing the time reversal test on the concrete beam specimen on the 10th, 20th and 30th days respectively. At the same time, a concrete cube specimen is taken out to perform the uniaxial compression test on the 10th, 20th and 30th days respectively; and using the above calculation results to evaluate the corrosion evolution process thereof without damaging the underwater concrete structure.

IPC Classes  ?

• G01N 17/00 - Investigating resistance of materials to the weather, to corrosion or to light
• G01N 3/08 - Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
• G01N 3/32 - Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
• G01N 29/04 - Analysing solids

Abstract

A damage identification method for a cantilever beam based on a multifractal spectrum of a multi-scale reconstructed attractor includes: acquiring an original acceleration signal of the cantilever beam by a dynamic measurement system, performing stationary wavelet decomposition on a pretreated acceleration signal to obtain multi-scale sub-signals, selecting the multi-scale sub-signal that can represent main vibration characteristics of the cantilever beam for phase space reconstruction and normalization to obtain a normalized multi-scale reconstructed attractor, constructing the multifractal spectrum of the multi-scale reconstructed attractor, establishing a damage index based on a singularity index of the multifractal spectrum, and identifying and locating damage of the cantilever beam according to a relative numerical value of the damage index. The method can quantify structural damage characteristics in multi-scale phase space domain from the perspective of multifractal, and provide the simple, rapid and accurate damage identification method for cantilever beam.

IPC Classes  ?

• G01M 7/02 - Vibration-testing

Abstract

A boundary adaptive structural fatigue damage detection method driven by time-domain information entropy comprises a sensor sequence composed of several sensors arranged on the structure, which is used to apply excitation to the structure, collect the displacement time-history response curves at different positions on the structure, and establish a database of time-history data. According to the data set in the database, the information entropy of the time-history response at different positions on the acquisition structure is obtained based on the information entropy to measure the disorder degree of the time-domain response signal. According to the location of several sensors, the information entropy values of the time-history response are connected in turn to obtain the time-history information entropy curve of the whole structure. Analyze of time-history information entropy curve, and the information entropy curve will show jump phenomena to determine the location of the crack.

IPC Classes  ?

• G01M 5/00 - Investigating the elasticity of structures, e.g. deflection of bridges or aircraft wings

Abstract

A cable tension calculation method simultaneously considering the sag, inclination angle and bending stiffness includes: querying basic parameters of a stay cable according to design data and construction data; considering influences of the sag, the inclination angle θ and the bending stiffness EI, to calculate dimensionless parameters γ, ε and λ2; testing an acceleration response of the stay cable by an acceleration sensor, to identify a frequency ω of the acceleration response of the stay cable, further calculating a dimensionless frequency {circumflex over (ω)} of the stay cable and the dimensionless parameters γ, ε and λ2, and substituting the dimensionless frequency {circumflex over (ω)} of the stay cable into a vibration characteristic equation, to establish a function relation between the dimensionless frequency {circumflex over (ω)} and a cable tension H* of the stay cable; and solving a root of the vibration characteristic equation, and identifying the cable tension H* of the stay cable according to the root.

IPC Classes  ?

• G01L 5/04 - Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands
• G06F 30/13 - Architectural design, e.g. computer-aided architectural design [CAAD] related to design of buildings, bridges, landscapes, production plants or roads

Abstract

A structural dynamic parameter identification method aided by a rPCK surrogate model comprises the following steps. Establish a finite element model that roughly reflects the structural system to be analyzed. Establish the dynamic parameter space sample set. The structural system response space sample set driven by the dynamic parameter space sample set is established by using the probabilistic finite element analysis. The robust polynomial Chaos Kriging surrogate model is obtained by mapping the dynamic parameter space sample set to the structural system response space sample set. The measured structural system response is used to drive the rPCK surrogate model, and then Bayesian inference is used to identify the structural dynamic parameters. The mean value of Bayesian posterior estimation is used as the estimated value of structural dynamic parameters. The proposed method creates conditions for establishing a high-fidelity finite element model of the actual engineering structural system.

IPC Classes  ?

• G06F 30/23 - Design optimisation, verification or simulation using finite element methods [FEM] or finite difference methods [FDM]
• G06F 30/13 - Architectural design, e.g. computer-aided architectural design [CAAD] related to design of buildings, bridges, landscapes, production plants or roads
• G06F 17/13 - Differential equations

Abstract

3Al, and an ordered strengthening phase is formed and is diffused and distributed in the binding phase, such that the rare earth hard alloy has a better high-temperature oxidation resistance, a better room-temperature fracture toughness and a better high-temperature bending strength than a conventional hard alloy.

IPC Classes  ?

• C22C 29/08 - Alloys based on carbides, oxides, borides, nitrides or silicides, e.g. cermets, or other metal compounds, e. g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds based on tungsten carbide
• C22C 29/00 - Alloys based on carbides, oxides, borides, nitrides or silicides, e.g. cermets, or other metal compounds, e. g. oxynitrides, sulfides
• C22C 1/051 - Making hard metals based on borides, carbides, nitrides, oxides or silicidesPreparation of the powder mixture used as the starting material therefor

Abstract

A high-strength and high-plasticity TWIP steel and a preparation method thereof are disclosed. In the disclosure, comprehensive properties of TWIP steel are improved by inclusion modification with Ce and Ba addition, fine grain strengthening and twinning nanocrystallization; the grain size is controlled by a low-temperature cold rolling, a transient annealing treatment and a low-temperature tempering treatment. Considering the addition of Ce, stacking fault energy of the TWIP steel is reduced, and the formation of twins, and the division of twins into grains are promoted, which further reduces a mean free path of dislocation motion, thereby improving yield strength, and finally obtaining a high-strength and high-plasticity TWIP steel.

IPC Classes  ?

• C21D 9/46 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for sheet metals
• C21D 8/02 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
• C21D 6/00 - Heat treatment of ferrous alloys
• C22C 38/04 - Ferrous alloys, e.g. steel alloys containing manganese
• C22C 38/00 - Ferrous alloys, e.g. steel alloys

Abstract

The present disclosure provides rare earth die steel. Mg and B elements are added on the basis of adding rare earth element Y, so that the rare earth element purifies a matrix, and grain boundary occupation by Mg and B is fully utilized to regulate grain network chromium carbides. In addition, the B element can fully improve hardenability of austenite and ensure that non-martensite such as bainite does not appear during the cooling process, and therefore rare earth die steel with high impact toughness and high isotropy is obtained.

IPC Classes  ?

• C22C 38/04 - Ferrous alloys, e.g. steel alloys containing manganese
• C22C 38/00 - Ferrous alloys, e.g. steel alloys
• C21D 8/00 - Modifying the physical properties by deformation combined with, or followed by, heat treatment

Abstract

Disclosed in the present invention are a permanent-magnet magnetic levitation rail transit control system and method based on 5G communication technology. The system comprises: an intelligent control center, a 5G communication platform, a train security system, an Internet of things monitoring system, and a passenger service system. In the present invention, targeted at the problem of being difficult to ensure barrier-free transmission of signals even by means of beamforming technology due to high moving speed of a permanent-magnet magnetic levitation rail transit system and small coverage of 5G base stations, a multi-connectivity scheme is used, and the intelligent control center selects two 5G base stations for signal transmission at the same time depending on distribution of 5G base stations along a line, wherein one 5G base station is the current closest base station, and the other 5G base station is the next base station to be approached. By means of a relay-type base station passing mode, it is ensured that a 5G communication platform can provide a stable and reliable communication link.

IPC Classes  ?

• B61L 27/70 - Details of trackside communication
• B61L 15/00 - Indicators provided on the vehicle or train for signalling purposes
• B61L 27/00 - Central railway traffic control systemsTrackside controlCommunication systems specially adapted therefor
• B61L 27/20 - Trackside control of safe travel of vehicle or train, e.g. braking curve calculation
• E01B 25/30 - Tracks for magnetic suspension or levitation vehicles
• E01F 13/04 - Arrangements for obstructing or restricting traffic, e.g. gates, barricades movable to allow or prevent passage
• H04W 36/30 - Reselection being triggered by specific parameters by measured or perceived connection quality data
• H04W 4/42 - Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P] for mass transport vehicles, e.g. buses, trains or aircraft
• H04W 36/00 - Handoff or reselecting arrangements
• H04W 84/00 - Network topologies
• H04W 84/04 - Large scale networksDeep hierarchical networks

Abstract

Embodiments of the present application provide a prediction method, device and system for rock mass instability stages, and belong to the technical field of rock mass instability prediction. The method includes the steps: acquiring acoustic emission signals of rock mass; extracting feature parameters from the acquired acoustic emission signals; and predicting instability stages of the rock mass in accordance with the feature parameters and a preset back propagation (BP) neural network model, wherein the preset BP neural network model is obtained by training a BP neural network and a genetic algorithm by virtue of the feature parameters of the acoustic emission signals at different rock mass instability stages. According to the technical solution in the present application, the problem in the training process of the BP neural network model that model parameter optimization may be easily trapped in a locally optimal solution is effectively solved.

IPC Classes  ?

• G06N 3/084 - Backpropagation, e.g. using gradient descent
• G06N 3/04 - Architecture, e.g. interconnection topology
• G06N 3/082 - Learning methods modifying the architecture, e.g. adding, deleting or silencing nodes or connections
• G06N 3/126 - Evolutionary algorithms, e.g. genetic algorithms or genetic programming
• G06N 5/022 - Knowledge engineeringKnowledge acquisition
• G10L 25/03 - Speech or voice analysis techniques not restricted to a single one of groups characterised by the type of extracted parameters
• G10L 25/30 - Speech or voice analysis techniques not restricted to a single one of groups characterised by the analysis technique using neural networks
• G10L 25/51 - Speech or voice analysis techniques not restricted to a single one of groups specially adapted for particular use for comparison or discrimination

Abstract

A steel plate suspension conveying device and method thereof, includes an initial suspension module, an intermediate transfer module and a tail end unloading module that are respectively provided with a plurality of electromagnets, wherein the electromagnets (5-6) of the initial suspension module controls the steel plate for suspension, the electromagnets (7-14) of the intermediate transfer module controls the motion of the steel plate toward the tail end unloading module, and the electromagnets (15-17) of the tail end unloading module controls the landing of the steel plate; sensor modules (18) installed on the electromagnets, and are capable of detecting the position, speed and temperature information of the steel plate conveyed by the electromagnets; a central processing unit (4) receiving the information sent by the sensor modules (18) and adjusts the magnitude of a current/voltage flowing into the electromagnets, thereby adjusting the magnitude of the electromagnet attraction applied by the electromagnets to the steel plate. The steel plate is conveyed by using suspension, and the steel plate is sufficiently cooled in the conveying process, so that the grain size and grain distribution of the steel plate are more uniform, thereby improving the consistency of the steel plate and enhancing the performance of the steel plate.

IPC Classes  ?

• B65G 54/02 - Non-mechanical conveyors not otherwise provided for electrostatic, electric, or magnetic
• B21D 43/00 - Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profilesAssociations therewith of cutting devices
• B65G 43/08 - Control devices operated by article or material being fed, conveyed, or discharged

Abstract

The present disclosure provides a method for optimizing a liquid injection process of ionic rare earth ore, including the following steps of: 1) testing the hydraulic properties of an ore body; 2) determining the diffusion degree of the ore body; 3) determining the spatial distribution of the rare earth grade and the impurity grade of the ore body prior to leaching; 4) determining model parameters of competitive exchange of rare earth ions and impurity ions with ammonium ions; 5) obtaining distribution of rare earth ion concentration within the ore body after completion of leaching; 6) obtaining a profile plot of a rare earth leaching rate as a function of the concentration and dosage of an injected leaching agent; and 7) determining a minimum leaching agent dosage to achieve a target leaching rate according to the profile plot, and then determining the ammonium sulfate concentration according to the minimum leaching agent dosage.

IPC Classes  ?

• G06F 30/20 - Design optimisation, verification or simulation
• E21B 43/28 - Dissolving minerals other than hydrocarbons, e.g. by an alkaline or acid leaching agent
• C22B 59/00 - Obtaining rare earth metals
• C22B 3/14 - Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic alkaline solutions containing ammonia or ammonium salts
• G06F 30/28 - Design optimisation, verification or simulation using fluid dynamics, e.g. using Navier-Stokes equations or computational fluid dynamics [CFD]
• G06F 111/10 - Numerical modelling
• G06F 119/18 - Manufacturability analysis or optimisation for manufacturability

Abstract

Provided is an automatic classification system. The automatic classification system is designed based on a YOLOV3 technical framework, so that garbage can be classified and recycled, garbage pollution is reduced, and waste is recycled at the maximum cost. The system is designed with a box of a double-layer structure, wherein an upper box is provided with a garbage throwing-in opening, a camera is mounted at the upper box, and the upper top of the upper box is provided with an partition layer for the installation of a solar panel and a storage battery, so as to meet the power supply requirement of the system. The camera captures thrown-in garbage and uses the recognition algorithm to recognize and classify the garbage classes. A lower box is designed into a double-box structure or a multi-box structure according to the class of the garbage, a mechanical and electric control part is arranged at the joint of the upper box and the lower box, two steering engines are used for respectively controlling the rotation of control baffles and a classification baffle so as to automatically drive the garbage to fall into classification boxes corresponding to the class of the garbage. The automatic classification of the garbage can be realized by the disclosure.

IPC Classes  ?

• B07C 5/34 - Sorting according to other particular properties
• G06Q 10/00 - AdministrationManagement
• B65F 1/00 - Refuse receptacles
• G06K 9/62 - Methods or arrangements for recognition using electronic means
• B07C 5/36 - Sorting apparatus characterised by the means used for distribution

Abstract

A cylinder structure of a rotary piston internal combustion engine includes a rotating shaft, the two sides of the rotating shaft are installed on machine bases, front deflector rods and rear deflectors rod are fixed to the two outer ends of the rotating shaft respectively, the included angles between the front deflector rods and the rear deflector rods are 29 degrees, the front deflector rods at the two outer ends are arranged in the radial direction of the rotating shaft at 180 degrees, and the rear deflector rods at the two outer ends are arranged in the radial direction of the rotating shaft at 180 degrees, and a combustion device and a compression device are sequentially arranged between the two machine bases.

IPC Classes  ?

• F02B 53/08 - Charging, e.g. by means of rotary-piston pump
• F02B 33/36 - Engines with pumps other than of reciprocating-piston type with rotary pumps of positive-displacement type

Abstract

A method for machining a linear motor reaction plate on the basis of friction stir welding, the method comprising: cleaning a conductive plate (1) and a magnetic conductive substrate (2), which are to be welded to each other; fixing and clamping the conductive plate and the magnetic conductive substrate together; selecting a pin tool (3) and welding process parameters, then, while a tool pin is rotating, inserting the tool pin into a linear motor reaction plate to be welded, and according to a preset welding route (5), the pin tool performing welding; and performing cutting according to dimensional requirements after welding is completed, thereby completing the whole machining process. According to the method, on the basis of friction stir technology, a linear motor reaction plate is machined, thereby overcoming a plurality of defects of using explosion welding to machine a linear motor reaction plate, reducing the machining cost of the linear electric motor reaction plate, and solving the problems of complex and dangerous operations and environmental pollution; and the present invention has the advantages of saving energy, being environmentally friendly and pollution-free, having low labor intensity and low cost, easily achieving automation and having good product consistency.

IPC Classes  ?

• B23P 15/00 - Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
• B23K 20/12 - Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by frictionFriction welding

Abstract

Provided are a steel plate suspended conveying device and a method thereof. The steel plate suspended conveying device comprises an initial suspension module, a middle transmission module and a tail end unloading module provided respectively with a plurality of electromagnets, wherein the steel plate is controlled to suspend by the electromagnets (5-6) of the initial suspension module, to move towards the tail end unloading module by the electromagnets (7-14) of the middle transmission module, and to fall by the electromagnets (15-17) of the tail end unloading module, a sensor module (18) is arranged on each of the electromagnets and can detect the position, speed and temperature information of the steel plate transmitted by the electromagnets, the information sent by the sensor modules (18) is received by a central processing unit (4), and then the current/voltage flowing into the electromagnets is adjusted, so that the attraction force of the electromagnets on the steel plate is adjusted. By conveying in a suspended manner, the steel plate can be fully cooled in the conveying process, and have more uniform grain size and grain distribution, enhanced consistency, and improved performances.

IPC Classes  ?

• B21B 39/00 - Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills

Abstract

The present disclosure discloses a method for dual-motor control on an electric vehicle based on adaptive dynamic programming. First, total torque required is calculated based on obtained data information of the electric vehicle under various driving conditions, and offline training is conducted on an execution network and an evaluation network. Then total torque is dynamically distributed for two motors of the electric vehicle under various driving conditions to obtain an efficiency MAP database. Afterwards, iteration and online learning are conducted on the execution network and the evaluation network based on data information of the electric vehicle under different driving conditions that is obtained in real time, so as to find an optimal control law for the electric vehicle under a real-time driving condition. In this way, the dual-motor control on the electric vehicle is optimized.

IPC Classes  ?

• B60L 15/20 - Methods, circuits or devices for controlling the propulsion of electrically-propelled vehicles, e.g. their traction-motor speed, to achieve a desired performanceAdaptation of control equipment on electrically-propelled vehicles for remote actuation from a stationary place, from alternative parts of the vehicle or from alternative vehicles of the same vehicle train for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
• B60K 1/02 - Arrangement or mounting of electrical propulsion units comprising more than one electric motor
• G06N 20/00 - Machine learning

Abstract

An automatic harvesting and collecting device for sisal hemp leaves includes an up-and-down moving assembly, a steering device, a braking mechanism, a mechanical vision sensor device, a vehicle traveling and controlling device, a forward-and-backward moving assembly, an omnidirectional automatic positioning and rotating device, a shearing and clamping device, a collecting device and a frame.

IPC Classes  ?

• A01D 46/30 - Robotic devices for individually picking crops
• A01D 46/22 - Baskets or bags attachable to the picker
• A01D 45/06 - Harvesting of standing crops of flax

Abstract

A train maintenance vehicle suitable for an air rail transit system. The train maintenance vehicle comprises a train suspending rail module (2), a maintenance operation platform module (3), a support frame module (1) and a carriage lifting module (4). The train maintenance vehicle is a comprehensive train maintenance vehicle integrating functions such as lifting, maintenance and mounting functions of a train, suitable for train maintenance in an air rail transit system, in particular a suspended permanent magnet maglev rail transit system, being able to realize the mounting and removal of a suspended train bogie of a suspended rail transport system, as well as the daily maintenance and repair of circuits and hardware structures, thereby effectively solving the problem of a train bogie being difficult to mount and repair.

IPC Classes  ?

• B61D 15/08 - Railway inspection trolleys

Abstract

Disclosed in the present invention are a permanent-magnet magnetic levitation rail transit control system and method based on 5G communication technology. The system comprises: an intelligent control center, a 5G communication platform, a train security system, an Internet of things monitoring system, and a passenger service system. In the present invention, targeted at the problem of being difficult to ensure barrier-free transmission of signals even by means of beamforming technology due to high moving speed of a permanent-magnet magnetic levitation rail transit system and small coverage of 5G base stations, a multi-connectivity scheme is used, and the intelligent control center selects two 5G base stations for signal transmission at the same time depending on distribution of 5G base stations along a line, wherein one 5G base station is the current closest base station, and the other 5G base station is the next base station to be approached. By means of a relay-type base station passing mode, it is ensured that a 5G communication platform can provide a stable and reliable communication link.

IPC Classes  ?

• B61L 27/00 - Central railway traffic control systemsTrackside controlCommunication systems specially adapted therefor
• H04W 36/08 - Reselecting an access point

Abstract

The present application provides a salt and pepper noise filtering method and device based on morphological component analysis. The method comprises: obtaining a to-be-filtered image containing salt and pepper noise; calculating the dimension of the to-be-filtered image, labeled as [n, m]; initializing an n*m-dimensional all-1 labeled matrix as a salt and pepper noise labeled map; obtaining a preset region centered on a pixel point with a pixel value of 0 or 255, and calculating a noise variance between the pixel points in the preset region; labeling the position of a salt and pepper noise point in the salt and pepper noise labeled map according to the noise variance between the pixel points in the preset region, and updating and determining the salt and pepper noise labeled map. The salt and pepper noise is filtered through the method based on morphological component analysis, which improves the quality of the image.

IPC Classes  ?

• G06T 5/00 - Image enhancement or restoration
• G06T 7/13 - Edge detection
• G06T 5/10 - Image enhancement or restoration using non-spatial domain filtering
• G06T 5/20 - Image enhancement or restoration using local operators
• G06T 7/40 - Analysis of texture

Abstract

A magnetic code information identification system and method, and an application thereof. The magnetic code information identification system comprises a vehicle-mounted identifier (102) and a magnetic pole code plate (101). The vehicle-mounted identifier (102) uses a vehicle-mounted identification code (7) having the preset magnetic sheet polarity. The magnetic pole code plate (101) uses the magnetic pole characteristics to hide the required information into a magnetic pole coding matrix sequence (2). The magnetic pole coding matrix sequence (2) of the magnetic pole code plate (101) is read and identified by the interaction between the vehicle-mounted identifier (102) and the magnetic pole code plate (101). The magnetic pole code plate (101) uses magnetic poles for information coding and storage, and is laid along the track in sequence. A running vehicle carries the vehicle-mounted identifier (102) to scan along the way to identify and read information such as the location and the road condition. The system has advantages of convenience, efficiency, high economic value, etc. The method can be applied to functions of a medium-low speed maglev train such as vehicle positioning and speed measurement, and road condition information acquisition, and is also suitable for real-time monitoring of the absolute location/speed of a conventional rail transit system.

IPC Classes  ?

• B61L 25/02 - Indicating or recording positions or identities of vehicles or trains
• B61L 25/04 - Indicating or recording train identities
• G06K 19/06 - Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
• G01B 7/00 - Measuring arrangements characterised by the use of electric or magnetic techniques

Abstract

A pyrrhotite mineral processing method, comprising the following steps: performing a coarse copper particle flotation process on pyrrhotite ores; performing a secondary fine copper particle flotation process on the obtained copper flotation concentrate; performing a copper flotation scavenging process on tailings obtained from the coarse copper particle flotation process; performing a magnetic separation process on tailings obtained from the copper flotation scavenging process; performing a coarse sulfur particle flotation process on tailings obtained from the magnetic separation process; performing a sulfur flotation scavenging process on tailings obtained from the coarse sulfur particle flotation process; and performing a secondary desulfurization process on concentrate obtained from the magnetic separation process, so as to obtain iron ore concentrate. The method applies in particular to pyrrhotite having low copper content and high ferrous sulfide content, and uses a process of low-alkali magnetic separation followed by flotation; valuable metals such as copper, iron, sulfur and pyrrhotite in copper-iron ores can be fully recovered.

IPC Classes  ?

• B03D 1/02 - Froth-flotation processes
• B03D 1/08 - Subsequent treatment of concentrated product
• B03C 1/00 - Magnetic separation

Abstract

A pyrrhotite mineral processing method using a low-alkali process of flotation followed by magnetic separation, comprising the following steps: performing a coarse copper particle flotation process on pyrrhotite ores; performing a secondary fine copper particle flotation process on the obtained copper flotation concentrate; performing a copper flotation scavenging process on tailings obtained from the coarse copper particle flotation process; performing a coarse sulfur particle flotation process on tailings obtained from the copper flotation scavenging process; performing a sulfur flotation scavenging process on tailings obtained from the coarse sulfur particle flotation process; and performing a magnetic separation process on tailings obtained from the sulfur flotation scavenging process, so as to obtain iron ore concentrate. The method applies in particular to pyrrhotite having low copper content and high ferrous sulfide content, and uses a low-alkali process of flotation followed by magnetic separation; valuable metals such as copper, iron, sulfur and pyrrhotite in copper-iron ores can be fully recovered.

IPC Classes  ?

• B03D 1/02 - Froth-flotation processes
• B03D 1/08 - Subsequent treatment of concentrated product
• B03C 1/00 - Magnetic separation

Abstract

An ore volume-based zonal injection method for ionic rare earth includes six steps of ore body data acquisition; ore volume calculation by units; calculation of leaching agent consumption γ per unit ore volume; calculation of unit ore volume-based zoning range difference; merging of the units into injection zones; and injection.

IPC Classes  ?

• G01N 15/08 - Investigating permeability, pore volume, or surface area of porous materials
• C22B 59/00 - Obtaining rare earth metals

Abstract

2 nanoparticles as a matrix raw material, adding other metal or intermediate alloy for smelting to obtain an alloy melt; preparing a wire blank with the alloy melt; subjecting the wire blank to hot rolling, drawing, intermediate annealing and surface treatment to obtain an Al—Zn—Mg—Cu alloy wire reinforced by particles at nano scale or submicron scale.

IPC Classes  ?

• B33Y 70/00 - Materials specially adapted for additive manufacturing
• C21D 8/06 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
• C21D 9/52 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for wiresHeat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for strips
• C22F 1/053 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with zinc as the next major constituent
• C22C 1/03 - Making non-ferrous alloys by melting using master alloys
• C22C 21/10 - Alloys based on aluminium with zinc as the next major constituent

Abstract

Disclosed are a method and a device for machining an aluminum flexible connecting belt based on friction stir welding technology. The machining method comprises the following steps: firstly, conveying a plurality of layers of aluminum foils (6) to a conveying part (1) by means of a conveying belt (12), and conveying the adjusted plurality of layers of aluminum foils (6) to a friction stir connecting part (2) by means of the conveying belt (12); secondly, performing friction stir connection on two sides of the plurality of layers of aluminum foils (6) by means of a friction stir connecting machine (24) on the friction stir connecting part (2); thirdly, conveying the plurality of layers of aluminum foils (6) that have been subjected to friction stir connection to a bending part (3) by means of the conveying belt (12); fourthly, conveying the plurality of layers of bent aluminum foils (6) to a punching and cutting part (4) by means of the conveying belt (12), and performing punching and cutting on parts to be punched of the plurality of layers of aluminum foils (6) by means of a punching and cutting machine (26) on the punching and cutting part (4), to obtain an aluminum flexible connecting belt; and finally, conveying the punched and cut aluminum flexible connecting belt to a packaging area to be detected and packaged. The machining method is reliable in terms of connection, stable in terms of performance and high in terms of production efficiency.

IPC Classes  ?

• B23K 20/12 - Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by frictionFriction welding
• H01B 5/00 - Non-insulated conductors or conductive bodies characterised by their form
• B21D 33/00 - Special measures in connection with working metal foils, e.g. gold foils

Abstract

Disclosed is a waste liquid treatment tank, comprising an inner tank body (8) and an outer tank body (6). The inner tank body (8) is made of a corrosion-resistant metal material; the outer tank body (6) is made of a common metal material; and the inner tank body (8) and the outer tank body (6) are formed into a whole by means of friction stir welding. The waste liquid treatment tank is formed by friction stir welding of two layers of different materials, such that machining costs are reduced, the machining difficulty is reduced, automated machining can be realized, and the production efficiency is improved.

IPC Classes  ?

• B23K 20/12 - Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by frictionFriction welding
• C02F 1/00 - Treatment of water, waste water, or sewage

Abstract

A data acquisition system for a space structure member of a suspension magnetic levitation track, the system comprising: a carrier (10) disposed at a lower end of an inverted U-shaped track beam (11) and being movable along a direction of permanent magnet levitation tracks (14) within the inverted U-shaped track beam (11), an infrared distance measurement data acquisition module provided on the carrier (10) and used to measure a distance between the permanent magnet levitation tracks (14) on two sides in the inverted U-shaped track beam (11), a height data acquisition module used to measure a vertical height at different positions of the inverted U-shaped track beam (11), a displacement data acquisition module used to measure a displacement generated by a movement of the carrier (10), and a data processing module. Data acquired by the infrared distance measurement data acquisition module, the height data acquisition module, and the displacement data acquisition module is transmitted to the data processing module. The invention enables acquisition of spatial displacement data information at different positions by pushing the system along the direction of the tracks, and has advantages of convenience, efficiency, accuracy, easy data analysis, etc. compared with single-point acquisition, thereby providing comprehensive data support for production, installation, maintenance, and the like of upper beams. Further provided is a determination method for a space structure member of a suspension magnetic levitation track.

IPC Classes  ?

• B61B 13/08 - Sliding or levitation systems
• E01B 25/30 - Tracks for magnetic suspension or levitation vehicles

Abstract

Disclosed is a permanent magnet magnetic suspension pipe track transportation system, comprising a pipeline (5) of a hollow cylindrical structure; and a vehicle body arranged in the pipeline (5). A magnetic track suspension guidance system and protective wheels are arranged around the pipeline (5), and the magnetic track suspension guidance system and the protective wheels keep the vehicle body from contact with the pipeline (5) of the hollow cylindrical structure that surrounds the outside of the vehicle body when the vehicle body runs. According to the permanent magnet magnetic suspension pipe track transportation system, an air pressure in the pipeline is reduced by conducting air exhaust treatment on the interior of the pipeline, such that air friction resistance and aerodynamic noise generated when the vehicle body runs are reduced.

IPC Classes  ?

• B60L 13/10 - Combination of electric propulsion and magnetic suspension or levitation
• B61B 13/10 - Tunnel systems
• B61B 13/08 - Sliding or levitation systems
• B60L 13/04 - Magnetic suspension or levitation for vehicles

Abstract

The present disclosure relates to a Radix Codcnopsitis Pilosulas sorting and threading machine that rapidly sorts and automatically threads a Radix Codcnopsitis Pilosulas into a string. The Radix Codcnopsitis Pilosulas sorting and threading machine includes a bottom plate, a support leg, a mounting frame, an N-shaped frame, a feeding hopper, a baffle, a first roller, a first conveyor belt, a drive motor, a deep groove ball bearing and a spindle, where the mounting frame is fixedly mounted on the bottom plate through the support leg, the N-shaped frame is mounted on an upper left side of the mounting frame, the feeding hopper is mounted in the top of the mounting frame, two first rollers are rotatably mounted on an upper part of the mounting frame, and a first roller on the right is higher than a first roller on the left.

IPC Classes  ?

• B07B 13/04 - Grading or sorting solid materials by dry methods, not otherwise provided forSorting articles otherwise than by indirectly controlled devices according to size
• B07B 13/16 - Feed or discharge arrangements
• F26B 9/10 - Machines or apparatus for drying solid materials or objects at rest or with only local agitationDomestic airing cupboards in the open airMachines or apparatus for drying solid materials or objects at rest or with only local agitationDomestic airing cupboards in pans or tables in roomsDrying stacks of loose material

Abstract

The embodiments of the present invention provide a crushing cavity structure for the technical field of crushing cavities of cone crushing equipment. The crushing cavity structure comprises: a first crushing cavity structure for through-crushing an input material having a first material characteristic, the first crushing cavity structure has a first crushing cavity and a first lining plate structure that match the first material characteristic, and the first crushing cavity and the first lining plate structure form a first-stage material crushing channel; a second crushing cavity structure for through-crushing a first-stage material having a second material characteristic, the first-stage material is obtained by the input material passing through the first-stage material crushing channel, the second crushing cavity structure has a second crushing cavity and a second lining plate structure that match the second material characteristic, and the second crushing cavity and the second lining plate structure form a second-stage material crushing channel.

IPC Classes  ?

• B02C 2/00 - Crushing or disintegrating by gyratory or cone crushers
• B02C 2/02 - Crushing or disintegrating by gyratory or cone crushers eccentrically moved
• B02C 25/00 - Control arrangements specially adapted for crushing or disintegrating
• G06F 30/20 - Design optimisation, verification or simulation

Abstract

An automatic sorting system designed on the basis of a YOLOV3 technical architecture. The system is designed with upper- and lower-layer structured housings. The upper-layer housing is provided with a waste inlet (8) and has a camera installed. The upper top part of the upper-layer housing is provided with a separate layer used for mounting a solar panel and a rechargeable battery. The camera captures waste thrown in. A recognition algorithm is utilized for recognizing and sorting with respect to types of waste. The lower-layer housing is designed as double housings or multiple housings on the basis of the types of waste. A mechanical electrical control part is mounted at where the two layers of housings are connected. Two servo motors are used to control respectively the rotation of a sorting baffle and that of a control baffle, thus automatically driving the waste to fall into a sorting housing corresponding to the type thereof. The system implements the sorting and recycling of waste, reduces waste pollution, and at the same time, recycles waste at maximum costs.

IPC Classes  ?

• B65F 1/00 - Refuse receptacles
• B65F 1/14 - Other constructional features

Abstract

Disclosed is a YOLO v3-based detection method for a key object at a transportation junction. In the present invention, an algorithm is designed on the basis of the concept of direct regression, and multi-scale detection and multi-label classification can be realized. In the present invention, a ResNet-based Darknet-53 network is designed, on the basis of the defects of current target detection technology, to serve as a feature extractor, so that the detection precision and speed of a YOLO technology architecture are improved, and the defect of same not being good at detecting a small object is also ameliorated. The Darknet-53 network takes both network complexity and detection accuracy into consideration, and, compared with a commonly used target detection feature extraction network VGG-16, the computation amount of a model is reduced. The method in the present patent introduces the latest developments in the field of artificial intelligence into the detection of a main target at a transportation junction, has a good effect on both detection precision and detection speed, and also has the potential of being expanded and applied to other fields.

IPC Classes  ?

• G06K 9/00 - Methods or arrangements for reading or recognising printed or written characters or for recognising patterns, e.g. fingerprints

Abstract

An intelligent controller for a permanent magnet maglev turnout, comprising a main controller and several sub-controllers. The main controller and the sub-controllers communicate by means of UWB communication units; the main controller and the sub-controllers each comprises a logic processing unit, a strong current unit, a power supply unit, and a UWB communication unit; the strong current unit, the power supply unit, and the UWB communication unit are all connected to the logic processing unit. The intelligent control of a maglev turnout is implemented by means of the combination of a main controller and sub-controllers, and the present invention has the characteristics of high integration and small size.

IPC Classes  ?

• G05B 19/042 - Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
• B61L 5/06 - Electric devices for operating points or scotch-blocks

Abstract

2/g, and a DBP absorption of 210 to 380 ml/100 g; and the carbon nanotubes have an average diameter of 7 to 15 nm.

IPC Classes  ?

• H01M 4/131 - Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
• H01M 4/485 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy
• H01M 4/62 - Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
• H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodesLithium-ion batteries
• H01M 4/02 - Electrodes composed of, or comprising, active material

Abstract

Disclosed is a method for preparing a rare-earth modified Keggin-type heteropolyacid-supported catalyst. Carbon nanotube is used as support, and is oxidized to form openings and cut into short tubes by an acidic solution. Under the action of metal chlorides and alcohol solvents, the end and the defect sites on the side walls of the carbon nanotubes are combined with hydroxyl groups to obtain hydroxylated carbon nanotube. In this way, the surface properties of the carbon nanotube are changed, and the active components are more easily and firmly adsorbed on the carbon nanotube, thus the stability of the catalyst is improved.

IPC Classes  ?

• B01J 37/03 - PrecipitationCo-precipitation
• B01J 23/10 - Catalysts comprising metals or metal oxides or hydroxides, not provided for in group of rare earths
• B01J 37/02 - Impregnation, coating or precipitation
• B01J 37/04 - Mixing
• C10G 7/06 - Vacuum distillation
• B01J 21/18 - Carbon

Abstract

Disclosed are a turnout system of permanent magnet maglev rail transit and a control method therefor. By means of providing a left-turn and a right-turn main rail (12, 13) along two sides of a turnout of a main rail (11), and with the function of the left-turn and right-turn main rails (12, 13) being to direct and guide a bogie body (17), turnout control over a permanent magnet maglev rail train is achieved. The switching of lines of permanent magnet maglev rail transit can be achieved by means of the control executed by the turnout system, such that the operating efficiency of maglev lines is improved, the laying of maglev lines is optimized, the amount of maglev rail lines laid is reduced, and the manufacturing cost of maglev rails is reduced.

IPC Classes  ?

• B61L 5/06 - Electric devices for operating points or scotch-blocks
• B60L 13/04 - Magnetic suspension or levitation for vehicles

Abstract

A device for correcting lateral deviation of a permanent magnet magnetic group, comprising a top beam (1), a magnetic group (2), and adjusting devices (3). The adjusting devices (3) are distributed inside the top beam (1), and the number of adjusting devices (3) needs to be increased when a special section, such as uphill, downhill, and turn, is encountered. A bogie (4) is provided in the top beam (1) and positioned at a centering position, and adjusting small wheels (5) are mounted on the bogie (4). When the bogie (4) centeredly passes through the adjusting devices (3), the gaps between the adjusting devices (3) and the adjusting small wheels (5) are 0. If the bogie (4) deviates, the adjusting devices (3) inside the top beam (1) contact the adjusting small wheels (5) mounted on the bogie (4) to provide an opposite acting force to enable the bogie (4) to return to the centering position, and if the bogie (4) does not deviate, the bogie (4) contactlessly passes through the adjusting devices (3). Thus, lateral deviation of the permanent magnet magnetic group is corrected. Also provided is an integrated permanent magnet magnetic levitation system.

IPC Classes  ?

• B60L 13/08 - Means to sense or control vehicle position or attitude with respect to railway for the lateral position

Abstract

Disclosed is a system for detecting lateral deviation of permanent magnet suspension. The system comprises a bogie (3) arranged above a permanent magnet rail (7) and used for bearing a load to realize operation or steering; a permanent magnet array (4) fixed on a lower surface of the bogie (3) and arranged opposite a magnetic pole on the permanent magnet rail (7), wherein a magnetic pole at a lower part of the permanent magnet array (4) is the same as the magnetic pole at an upper part of the permanent magnet rail (7), so as to interact with a magnetic field of the permanent magnet rail (7) to provide upward thrust for the bogie (3) so as to maintain the bogie (3) in a suspended state without direct contact relative to the permanent magnet rail (7); an insulating support (5) arranged on a lower side of the bogie (3) and arranged opposite the magnetic pole on the permanent magnet rail (7); and a coil (6) wound on the insulating support (5) in the same direction, wherein under the action of the magnetic field between the permanent magnet array (4) and the permanent magnet rail (7), the coil (6) generates electromagnetic induction and produces an induced current; the coil (6) is further connected in series to an amplifier (1) and a current detection unit (2) to form a detection circuit, and after the induced current is amplified by the amplifier (1), the current detection unit (2) detects the magnitude and/or direction of the induced current; the magnetic flux in the coil (6) is maintained within a first magnetic flux range in the state where there is no lateral deviation between the bogie (3) and the permanent magnet rail (7), and the induced current detected in the detection circuit is correspondingly maintained within a first current range; the magnetic flux in the coil (6) exceeds the first magnetic flux range in the state where lateral deviation occurs between the bogie (3) and the permanent magnet rail (7), and correspondingly, the induced current detected in the detection circuit exceeds the first current range; and the detection system detects, according to the magnitude and/or direction of the induced current, whether lateral deviation occurs and/or the direction of the lateral deviation and/or the displacement of the lateral deviation. Disclosed is a method for detecting lateral deviation of permanent magnet suspension.

IPC Classes  ?

• G01B 7/312 - Measuring arrangements characterised by the use of electric or magnetic techniques for measuring angles or tapersMeasuring arrangements characterised by the use of electric or magnetic techniques for testing the alignment of axes for testing the alignment of axes for measuring eccentricity, i.e. lateral shift between two parallel axes
• B61K 9/08 - Measuring installations for surveying permanent way

Abstract

A grinding device for raised joints of rivets on sheet metal is provided, including a lateral plate, legs, a moving plate, first springs, a first bearing seat, a sleeve, a grinding wheel, a moving bar, a 7-shaped plate, a vertical bar, a second spring, an oscillating plate, etc. The legs are fixedly connected, in a symmetric manner, to left and right sides of the bottom of the lateral plate. A through hole, which has a function of guiding, is formed on a left side of the lateral plate. The moving bar is located in the through hole. In the present disclosure, a driving motor is started to rotate the grinding wheel, the grinding device is moved to enable the grinding wheel to be located above a raised joint, and then the oscillating plate is pulled so that the grinding wheel can move downward to grind the raised joint.

IPC Classes  ?

• B24B 19/00 - Single purpose machines or devices for particular grinding operations not covered by any other main group
• B24B 23/02 - Portable grinding machines, e.g. hand-guidedAccessories therefor with rotating grinding toolsAccessories therefor
• B24B 19/02 - Single purpose machines or devices for particular grinding operations not covered by any other main group for grinding grooves, e.g. on shafts, in casings, in tubes, homokinetic joint elements

Abstract

Disclosed are an unmanned aerial vehicle recognition and positioning system and method based on RGB_D and a deep convolutional network. The system comprises a camera monitoring module, an unmanned aerial vehicle recognition module, a two-dimensional image generation three-dimensional grid module and an RGB_D distance measuring and positioning module, wherein the camera monitoring module acquires an image of a whole monitoring region; the unmanned aerial vehicle recognition module matches the image of the monitoring region with a pre-stored unmanned aerial vehicle image feature to recognize whether there is an unmanned aerial vehicle in the monitoring region; the two-dimensional image generation three-dimensional grid module generates a three-dimensional grid graph from the image, acquired by the camera monitoring module, of the monitoring region by means of a graph convolutional neural network; and the RGB_D distance measuring and positioning module acquires an RGB_D image of the monitoring region by means of a binocular camera, calculates the distance between the unmanned aerial vehicle and the binocular camera according to a relationship between the color depth of the unmanned aerial vehicle and the color depth of the binocular camera in the RGB_D image of the monitoring region, and obtains the direction of the unmanned aerial vehicle in conjunction with the three-dimensional grid graph to realize the specific positioning of the unmanned aerial vehicle. The system can realize the high-precision recognition and positioning of an unmanned aerial vehicle in a region.

IPC Classes  ?

• G06K 9/00 - Methods or arrangements for reading or recognising printed or written characters or for recognising patterns, e.g. fingerprints

Abstract

The present disclosure relates to a method for determining a source sink term of an ionic type rare earth ore leaching process. The method includes the following four steps: (1) determining an ion exchange selection coefficient of a rare earth ore sample; (2) determining the rare earth grade of the rare earth ore sample; (3) building a source sink term model of the ore leaching process; and (4) determining parameters in the source sink term model. The present disclosure can simulate the ionic type rare earth ore leaching process by combining a convection-dispersion equation, and determine the optimal concentration of the ore leaching agent. When an ammonium sulfate solution at an optimal concentration of 12.0 g/L is used to perform a column leaching test, the obtained rare earth leaching rate is up to 96.3 percent.

IPC Classes  ?

• C22B 3/14 - Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic alkaline solutions containing ammonia or ammonium salts
• C22B 59/00 - Obtaining rare earth metals
• G06F 30/20 - Design optimisation, verification or simulation

Abstract

Disclosed is a system for detecting photographing of an unmanned aerial vehicle, the system comprising a controllable flash module, an unmanned aerial vehicle signal detection and recognition module and an unmanned aerial vehicle signal processing module, wherein the controllable flash module can start a flickering light source after monitoring the brightness of a target area. By means of unmanned aerial vehicle video compression, i.e. the principle of performing compression by means of inter-frame and intra-frame compression and comparing the differences between images and in the images, and by using a method where an array light source flickers, when an unmanned aerial vehicle photographs the flickering of the array light source, the differences between two frames of image and in the same frame of image increase rapidly, causing a bit rate of an image transmission signal of the unmanned aerial vehicle to increase; therefore, whether the unmanned aerial vehicle is performing photographing can be determined by comparing the magnitude of the bit rate of the image transmission signal of the unmanned aerial vehicle before a controllable flash module is started and the magnitude of the bit rate of the image transmission signal of the unmanned aerial vehicle after the controllable flash module is started. Whether an unmanned aerial vehicle is performing photographing can be determined without deciphering an encrypted image transmission signal of the unmanned aerial vehicle, thereby achieving the advantages of high efficiency and low costs.

IPC Classes  ?

• G08G 5/00 - Traffic control systems for aircraft

Abstract

The present invention discloses a method for effectively decomposing mixed wolframite and scheelite ore in an alkaline system, specifically comprising steps of: grinding mixed wolframite and scheelite ore, putting in an autoclave, adding an appropriate amount of water, and then adding sodium phosphate, sodium hydroxide and calcium fluoride for decomposition, and treating by solid-liquid separation to obtain crude sodium tungstate solution. The present invention has the advantage that the high-efficiency decomposition of the mixed wolframite and scheelite ore can be realized with low consumption of leaching agents. By this method, the mixed wolframite and scheelite ore can be directly treated by an existing tungsten smelting autoclave, with low leaching cost, high decomposition rate and easy industrial application.

IPC Classes  ?

• C22B 34/36 - Obtaining tungsten
• C22B 1/24 - BindingBriquetting
• C22B 3/12 - Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic alkaline solutions

Abstract

The present invention discloses a method for decomposing medium-/low-grade scheelite, specifically comprising steps of: grinding medium-/low-grade scheelite, decomposing in an autoclave by using sodium phosphate and activated magnesium fluoride as leaching agents, and treating by solid-liquid separation to obtain crude sodium tungstate solution and residue. In this way, the medium-/low-grade scheelite is decomposed. Magnesium chloride is added in a sodium fluoride solution to prepare activated magnesium fluoride as a leaching agent. The present invention has the advantage that the high-efficiency decomposition of medium-/low-grade scheelite can be realized with low consumption of leaching agents, and the leaching cost can be greatly reduced in comparison to the existing decomposition processes using sodium hydroxide and sodium carbonate. This process is short in route, simple in operation, readily available and reliable in production equipment, and easy for industrialization.

IPC Classes  ?

• C22B 34/36 - Obtaining tungsten
• C01G 41/00 - Compounds of tungsten
• C22B 1/00 - Preliminary treatment of ores or scrap
• C22B 3/04 - Extraction of metal compounds from ores or concentrates by wet processes by leaching

Abstract

2222, so as to obtain iron ore concentrate suitable for use as an iron melting raw material and magnetic separation tailings suitable for use as a raw material for building materials such as cement.

IPC Classes  ?

• C22B 1/02 - Roasting processes

Abstract

A suspension-type maglev rail transit system, comprising a rail system, a suspension system, a control system and a car system, wherein the control system comprises a drive system, a guidance system and a suspension control system, the rail system is suspended in the air via upright posts (36), the car system is suspended vertically below the rail system via the suspension system, and the drive system and the guidance system cooperate to drive the car system to run in the rail system.

IPC Classes  ?

• B61B 3/00 - Elevated railway systems with suspended vehicles
• B61B 13/08 - Sliding or levitation systems
• B60L 13/04 - Magnetic suspension or levitation for vehicles

Abstract

The present invention provides a levitation control method for a maglev skytrain. A permanent magnetic track, made of rare earth permanent magnetic materials, for the suspended maglev train is installed in a sky beam, and interacts with a permanent magnet set on a bogie to create a repulsive force. According to the levitation control method, stable levitation and non-contact operation are implemented by means of the steps of levitation control, travelling by driving, steering control, speed measurement and positioning control, braking, etc. A linear induction drive motor in cooperation with a positioning system allows for safe and stable travel. According to the present invention, the defect of the instability of a levitation system composed of a permanent magnet is overcome, thus improving the stability of the levitation system.

IPC Classes  ?

• B60L 13/04 - Magnetic suspension or levitation for vehicles
• B61B 13/08 - Sliding or levitation systems

Abstract

A suspended rail transport device and a magnetic-electric hybrid suspension rail system thereof. The suspended rail transport device comprises a control unit, rails, and vehicle-mounted magnetoelectric rails. The vehicle-mounted magnetoelectric rails comprise at least two vehicle-mounted permanent magnet arrays, electromagnets, and distance sensors arranged in a traveling direction of a vehicle. The rail comprises a rail permanent magnet array. The rail permanent magnet array and the vehicle-mounted permanent magnet array are spaced apart from each other in an offset manner, and mutually-repulsive magnetic poles thereof ensure self-stabilization of the rail and the vehicle-mounted magnetoelectric rail. In addition, the distance sensor, the control unit, and the electromagnet form a closed-loop control system. The control unit uses data of the distance sensor to control the magnitude of an excitation current in the electromagnet, and the excitation current excites a magnetic field to ensure that the rail permanent magnet array does not contact the vehicle-mounted permanent magnet array, so as to achieve suspension. In the present invention, suspension rigidity is high, and the rail and the vehicle-mounted magnetoelectric rail form a self-stabilizing system, thereby reducing vibration during loaded traveling.

IPC Classes  ?

• B60L 13/04 - Magnetic suspension or levitation for vehicles
• B61B 13/08 - Sliding or levitation systems

Abstract

An ultrasonic thrombus removing system includes a front sheath tube (1) and a rear sheath tube (5) that are independent and that are inserted into a blood vessel (2); a rear end outer portion of the front sheath tube (1) is mounted with a front blocking balloon (105), and a front end outer portion of the rear sheath tube (5) is mounted with a rear blocking balloon (504); a breaking cavity (4) being formed between the two blocking balloons; the front blocking balloon (105) and the rear blocking balloon (504) expand or contract in the blood vessel (2) by means of the squeezing or loosening of an external force so as to block or open front and rear sides of the thrombus (3); an inner portion of the rear sheath tube (5) is provided with a core tube (502) that co-axially penetrates therethrough, a front end of the core tube (502).

IPC Classes  ?

• A61B 17/22 - Implements for squeezing-off ulcers or the like on inner organs of the bodyImplements for scraping-out cavities of body organs, e.g. bonesSurgical instruments, devices or methods for invasive removal or destruction of calculus using mechanical vibrationsSurgical instruments, devices or methods for removing obstructions in blood vessels, not otherwise provided for
• A61B 17/221 - Calculus gripping devices in the form of loops or baskets

Abstract

The present invention provides a positive electrode composition for lithium ion secondary batteries, which enables easy achievement of a lithium ion secondary battery that has a low internal resistance, while exhibiting excellent output characteristics, cycle characteristics and low-temperature characteristics. A positive electrode composition for lithium ion secondary batteries, which contains a conductive agent and an active material that is capable of absorbing and desorbing lithium ions, and which is characterized in that: the active material is composed of a lithium nickel cobalt manganese composite oxide; the conductive agent is composed of a carbon black and carbon nanotubes; the carbon black has a BET specific surface area of 100-400 m2/g and a DBP absorption of 210-380 ml/100 g; and the carbon nanotubes have an average diameter of 7-15 nm.

IPC Classes  ?

• H01M 4/131 - Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
• H01M 4/505 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
• H01M 4/525 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
• H01M 4/62 - Selection of inactive substances as ingredients for active masses, e.g. binders, fillers

Abstract

Provided are a flux cored welding rod forming module, a preparation device and a preparation method thereof. When a flux cored welding rod forming module is used, firstly, an elongated hollow shell (1) is formed in a shell molding portion, and then welding flux (11) is injected into the hollow portion of the shell through a welding flux introducing passage (3), thereby solving the problem in the prior art that the welding flux is coated on an outer layer of an alloy tube and is adhered by an adhesive, resulting in large volume of smoke during use. The method for continuously preparing the flux cored welding rod does not produce a crease, and avoids pollution to the welding rod caused by a lubricant entering the crease when the welding rod is pulled during the later process.

IPC Classes  ?

• B23K 35/40 - Making wire or rods for soldering or welding

Abstract

A method and device for the intelligent decision and endpoint prediction of a PS copper converter blowing process. The device comprises: an OPC data collection module (302) used for collecting operation data of a blowing process; a composition calculation module (303) used for calculating each phase composition in a furnace within a given infinitesimal time period; a temperature calculation module (304) used for calculating the temperature of melt in the furnace within the given infinitesimal time period; a blowing endpoint prediction module (305) used for judging and predicting a blowing endpoint according to different endpoint judgement conditions of a slag making period and a copper making period; a data storage management module (306) used for storing various data; a cold material calculation module (307) used for calculating the adding amount and the adding time of cold materials; and a system general-control module (301) used for switching between a blowing endpoint prediction mode and an optimizing decision mode, the system general-control module (301) being connected to the blowing endpoint prediction module (305) and the cold material calculation module (307).

IPC Classes  ?

• G05B 19/418 - Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM]
• C22B 15/06 - Obtaining copper in converters