The present application discloses a horizontal low-pressure vibration test apparatus. The horizontal low-pressure vibration test apparatus comprises a negative-pressure enclosure, a vacuum vibration test platform, and a vibration sealing element that connects the vacuum vibration test platform to the negative-pressure enclosure; the negative-pressure enclosure comprises side walls, a bottom wall, and a first vacuum pump used for forming negative pressure in the negative-pressure enclosure; the vacuum vibration test platform comprises a vibration platform, a moving coil connected to the vibration platform to output vibration, a second vacuum pump connected to the vibration platform, and a high-pressure air source connected to the vibration platform; the vibration platform is arranged adjacent to the negative-pressure enclosure in the horizontal direction. The horizontal low-pressure vibration test apparatus in the present invention can implement negative-pressure vibration testing in the horizontal direction, and by providing the vibration platform and the second vacuum pump, the moving coil can be balanced, thereby preventing uneven force caused by the moving coil being subjected to unilateral negative pressure.
Provided is a horizontal low-pressure vibration testing apparatus, comprising a negative pressure testing chamber (1), a vacuum vibration test shaker (2), and a control unit, wherein the negative pressure testing chamber (1) comprises a negative pressure chamber body (11), and a first vacuum pump configured for forming negative pressure within the negative pressure chamber body (11); the vacuum vibration test shaker (2) comprises a shaker body (21), a moving coil (22) connected to the shaker body (21) to output vibration, a second vacuum pump connected to the shaker body (21), a high-pressure air source connected to the shaker body (21), and a displacement sensor configured for detecting the position of the moving coil (22). The shaker body (21) is arranged adjacent to the negative pressure testing chamber (1) in the horizontal direction. The horizontal low-pressure vibration testing apparatus and method provide a displacement sensor to detect the position of the moving coil (22) and then control the air pressure within the shaker body (21) based on a detection result. This balances the moving coil (22), thereby improving vibration testing precision and preventing test errors due to oscillation of the moving coil (22).
A vibration test platform for an automobile generator (13), the vibration test platform comprising: a vibration table (1), a driving device (2), and a tension device (3), wherein the vibration table (1) comprises a table body (11) and a movable coil (12) located in the table body (11), and the movable coil (12) extends out of an upper end surface of the table body (11); a generator (13) is fixedly provided on the table body (11), a rotating shaft of the driving device (2) is rotatably connected to a rotor of the generator (13) by means of a belt (4), and the tension device (3) applies a first tensile force to a stator of the generator (13); and when the movable coil (12) is stationary, a second tensile force of the belt (4) on the rotor and the first tensile force are in the same straight line, and have opposite directions and equal magnitudes, and the straight line is perpendicular to a vibration direction of the movable coil (12). The vibration test platform can perform a vibration test on the generator (13) in an automobile.
The present application discloses a signal processing method, device, and storage medium. The signal processing method comprises: acquiring a scanned target collection and multiple initial targets, and dividing them into multiple clusters; performing signal-to-noise ratio statistical analysis and false target statistical analysis on each first cluster among the multiple clusters, thereby removing initial targets with non-compliant signal-to-noise ratio and false targets. The signal processing method is capable of identifying and eliminating initial targets with non-compliant signal-to-noise ratio and false targets.
G01S 7/41 - Détails des systèmes correspondant aux groupes , , de systèmes selon le groupe utilisant l'analyse du signal d'écho pour la caractérisation de la cibleSignature de cibleSurface équivalente de cible
G01S 7/02 - Détails des systèmes correspondant aux groupes , , de systèmes selon le groupe
A swing-vibration combined test bench, comprising a base (100), vibration excitation assemblies and a vibration table top (300). The vibration excitation assemblies are rotatably connected to the vibration table top (300) and the base (100), and apply a vibration force in the vertical direction to the vibration table top (300); righting assemblies (400) are provided between the base (100) and the vibration table top (300) and each comprise a righting support (410) and a swing arm (420), the righting supports (410) being arranged on the base (100); one end of each swing arm (420) is provided with a first decoupling rotation mechanism (430) connected to a righting support (410), and the other end of each swing arm (420) is provided with a second decoupling rotation mechanism (440) connected to the vibration table top (300); each first decoupling rotation mechanism (430) comprises a holder (431) and a first rotating shaft (432) supported on the holder (431), the axis of the first rotating shaft (432) being parallel to the horizontal plane; end parts of the swing arms (420) are rotatably connected to the first rotating shafts (432), and the swing arms (420) can perform rotational motion perpendicular to the horizontal plane around the first decoupling rotation mechanisms (430) along with the vibration table top (300); horizontal deflection compensation members are provided on the holders (431), and are used for enabling the swing arms (420) to rotate in the horizontal direction; while performing reciprocating vibration in the vertical direction, the vibration table top (300) rotates in the horizontal direction along with the swing arms (420).
The present application discloses a multidirectional expansion platform and a vibration test bench. The multidirectional expansion platform comprises a support table, a plurality of support legs extending downwards from one side of the support table, two guide rails provided on each support leg and extending in the vertical direction, an upper mounting table mounted on the support table, and a plurality of side mounting tables mounted on every two adjacent support legs; the two guide rails on each support leg have different orientations; each guide rail and the guide rails on the support leg adjacent thereto are located on the same plane; and the side mounting tables are fixedly connected to the upper mounting table. According to the multidirectional expansion platform and the vibration test bench of the present application, the upper mounting table and the plurality of side mounting tables are provided, so that multidirectional and batch vibration testing of test pieces can be realized; the structure is compact, the occupied space is small, and the costs are low.
The present application discloses a vibration test apparatus. The vibration test apparatus comprises an impact hydraulic vibration table, a hydraulic power unit used for supplying oil, and an oil inlet accumulator station connected between the hydraulic power unit and the impact hydraulic vibration table. The oil inlet accumulator station comprises a plurality of first accumulators; the impact hydraulic vibration table comprises a table top and a hydraulic vibration exciter used for driving the table top to vibrate; a plurality of oil tubes are provided on the hydraulic vibration exciter; and the oil tubes are used for being communicated with the first accumulators. The vibration test apparatus of the present invention can simulate a damped sinusoidal vibration test under a similar arresting impact, and can also perform an instantaneous high-speed large-scale vibration test, there is no need to design a large hydraulic power unit, and instantaneous large-flow output can be achieved by means of supplement of the oil inlet accumulator station, thereby completing a high-speed test.
An impact device and an impact platform, the impact device (4) comprising an impact member (41), a fixing base (42) spaced apart from the impact member (41), a support rod (43) passing through the fixing base (42) and fixedly connected to the impact member (41), a first clamping member (44) provided on the impact member (41), and a second clamping member (45) provided on the fixing base (42). The impact device (4) has a first state in which the first clamping member (44) is away from the second clamping member (45), and a second state in which the first clamping member (44) clamps in a single direction relative to the second clamping member (45) so as to prevent the impact member (41) from being away from the fixing base (42). In the impact device (4) and the impact platform (100), the first clamping member (44) and the second clamping member (45) are provided for clamping, and using physical structures for locking achieves higher reliability, thus effectively avoiding a secondary impact on objects under test.
An impact cylinder (100), comprising a cylinder reservoir (1), a piston cylinder (2) arranged in the cylinder reservoir, a piston (3) arranged in the piston cylinder, a rear base (4) arranged on one side of the cylinder reservoir, a quick release valve (5) arranged in the rear base, a front base (6) arranged on the other side of the cylinder reservoir, and a cutoff ring (7) arranged in the front base, wherein the piston is provided with a piston head (31) abutting against the piston cylinder and a piston rod (32) having one end fixedly connected to the piston head; the other end of the piston rod passes through the front base; a release passage (61) communicating the piston cylinder with external air is arranged on the front base; the cutoff ring is used for controlling the opening or closing of the release passage. Also disclosed is an impact test device comprising the impact cylinder (100). The impact cylinder and the impact test device achieve a wide pressure range, low pressure drop loss, a high response speed, high buffer performance, and high safety and reliability.
F15B 15/14 - Dispositifs actionnés par fluides pour déplacer un organe d'une position à une autreTransmission associée à ces dispositifs caractérisés par la structure de l'ensemble moteur le moteur étant du type à cylindre droit
The present invention relates to a method for picking up signals from an impact vibration sensor, which comprises: sampling impact vibration signal; averaging and identifying a maximum value of the impact vibration signal; determining whether the maximum value is located in the middle of the sampling data; if yes, determining whether sampling data on both sides of the maximum value exhibit monotonic increase or monotonic decrease and values are approximately the same, and determining appropriate sampling data is collected if three requirements are all met; if not, adjusting sampling data until requirements are met. Processing signals collected by the impact vibration sensor in the time domain allows for obtaining impact vibration signals that meet requirements. The accuracy of the signals is high, enabling real-time signal acquisition. Additionally, corroborating the results of time-domain processing through frequency-domain analysis enhances the reliability and accuracy of the collected signals.
A linear vibration exciter, comprising a cylinder body (1), a stator module arranged on the cylinder body (1), a rotor module arranged on the cylinder body (1), vibration excitation rods (2) arranged on the rotor module, and a table top (3) arranged on the vibration excitation rods (2). A magnetic fitting module is provided between the stator module and the rotor module; the magnetic fitting module comprises at least one permanent magnet (41) and at least one drive coil (42) fitting with the permanent magnet (41); each drive coil (42) reciprocates in the magnetic field of the corresponding permanent magnet (41), so as to drive the vibration excitation rods (2) and the table top (3) to vibrate; the magnetic pole directions of the permanent magnet (41) are perpendicular to the movement direction of the vibration excitation rods (2), one magnetic pole of the permanent magnet (41) facing the drive coil (42). By arranging the permanent magnet (41) in the direction perpendicular to the vibration excitation direction, the linear vibration exciter can enhance the magnetic field perpendicular to the movement direction, so as to increase the effective magnetic field area, thus improving the working efficiency of the drive coil (42).
B06B 1/04 - Procédés ou appareils pour produire des vibrations mécaniques de fréquence infrasonore, sonore ou ultrasonore utilisant l'énergie électrique fonctionnant par électromagnétisme
The present invention discloses a vibration table based on fluid cooling, including: a pressure bearing table body and a fluid supply device, wherein the pressure bearing table body includes a cavity and a moving ring located in the cavity, a through hole is formed in an upper housing of the cavity, and the moving ring penetrates out of the through hole; the cavity is provided therein with a driving device and a cooling system, the driving device can drive the moving ring to vibrate up and down, and the cooling system is configured to refrigerate the cavity; the fluid supply device receives fluid from the cavity, refrigerates the fluid, and outputs the refrigerated fluid to the cavity. A rolling seal can isolate the cavity from an external space, so as to protect the cavity and components therein.
A decoupling mechanism (01) for large-displacement vibration tests includes a first transfer decoupling assembly (1), a rotary amplifying assembly (3) and a second transfer decoupling assembly (2), wherein the first transfer decoupling assembly (1) includes a first transfer shaft (11) and a first transfer main body (12) axially connected to the first transfer shaft (11); the second transfer decoupling assembly (2) includes a second transfer shaft (21) and a second transfer main body (22) axially connected to the second transfer shaft (21); an extension direction of the axis of the first transfer shaft (11) is the same as that of the axis of the second transfer shaft (21); a first connecting shaft (15) is arranged between the rotary amplifying assembly (3) and the first transfer main body (12), and a second connecting shaft (25) is arranged between the rotary amplifying assembly (3) and the second transfer main body (22); and extension directions of the axis of the first connecting shaft (15) and the axis of the second connecting shaft (25) are the same and are perpendicular to that of the axis of the first transfer shaft (11) or the second transfer shaft (21). A vibration testing apparatus prepared by combining the decoupling mechanism (01) with a vibration exciter (02) and a sliding table assembly (03) realizes large-displacement vibration of the sliding table assembly.
An oil return assembly (1) and a horizontal vibration test bench (100). The oil return assembly (1) comprises a fixed plate (11), at least two oil outlet holes (12) formed in the fixed plate (11), and flow adjustment devices (13); each flow adjustment device (13) comprises a mounting seat (131) fixed between two oil outlet holes (12), a swing rod (132) mounted on the mounting seat (131), and floating balls (133) arranged at two ends of the swing rod (132); spherical grooves (121) matched with the floating balls (133) are formed at the top ends of the oil outlet holes (12); and the swing rod (132) is rotatably arranged relative to the mounting seat (131) so as to control the relative position of the floating balls (133) and the spherical grooves (121). According to the horizontal vibration test bench (100) and the oil return assembly (1), the swing rod (132) is provided to drive the floating balls (133) at two ends to move up and down, so that the opening sizes of the two oil outlet holes (12) at different distances can be automatically adjusted, the oil return flow of different oil outlet holes (12) is adjusted, the oil return flow of two oil return pipes (15) at different distances can be balanced, and the stability of a system is improved.
The present invention provides a double-output vibration exciter, which comprises: a double-output oil cylinder body; two piston rods protruding from the double-output oil cylinder body in two directions; a servo valve, which is used to control the two piston rods to reciprocate separately or together; an energy accumulator, which is used to stabilize output pressure; and a detection assembly, which is used to detect displacement of the piston rods. The detection assembly comprises: a rod-shaped magnetostrictive sensor, which is fixed on the double-output oil cylinder body and extends along an extending direction of the piston rods; and a magnetic ring, which is fixed with the piston rods and sleeves the magnetostrictive sensor. When the piston rods move relative to the double-output oil cylinder body, the magnetic ring moves relative to the magnetostrictive sensor. A double-output vibration table and the double-output vibration exciter of the present invention can meet mounting requirements of both long specimen products and multiple small specimens, thereby increasing the testing efficiency of batch specimens and reducing space requirements for mounting long specimens.
G01B 7/02 - Dispositions pour la mesure caractérisées par l'utilisation de techniques électriques ou magnétiques pour mesurer la longueur, la largeur ou l'épaisseur
16.
DURABILITY TESTING APPARATUS FOR WATER DRAINAGE FLAP, AND TESTING METHOD USING THE DURABILITY TESTING APPARATUS FOR WATER DRAINAGE FLAP
A durability testing apparatus for a water drainage flap to test the durability of the water drainage flap. The water drainage flap comprises a flap column, a water drainage plate arranged inside the flap column and a water drainage rotation shaft connected with the water drainage plate. The durability testing apparatus for the water drainage flap comprises: a vibration table for providing vertical reciprocal vibration and a water inlet flange disc fixed on the vibration table for supplying water to the water drainage flap, wherein the water inlet flange disc comprises a base fixed to the vibration table and a water inlet column arranged on the base and facing the water drainage flap, a water inlet is provided in the water inlet column, the water inlet column and the flap column enclose a water inlet chamber, and the water inlet communicates with the water inlet chamber.
An inverse vibration composite environmental testing system, comprising a support (1), a vibration excitation assembly (2), an air pressure balance assembly (3), and a test box (4) which is arranged below the support (1). The vibration excitation assembly (2) comprises a vibration exciter (201) mounted on the support (1) for vertical vibration, and an output end of the vibration exciter (201) is connected to a moving ring adapter plate (5). The air pressure balance assembly (3) comprises a bottom plate (301) arranged on the support (1) and several circumferentially and uniformly distributed air springs (302) arranged on the bottom plate (301), and an upper portion of each air spring (302) is connected to the moving ring adapter plate (5). A bottom end of the moving ring adapter plate (5) is connected to a connector (6). A sealing assembly (7) is arranged between the connector (6) and the test box (4) for sealing. The vibration exciter (201) transmits vibrations from above the test box (4) to the interior of the test box (4) by means of the connector (6). By means of the described structure, a hoisting test piece is convenient to mount. The structure has good support and air pressure balance capabilities, which improves the anti-unbalanced loading and anti-overturning performance of the system, and has high sealing performance. Vibration testing and environmental testing may be simultaneously carried out.
Disclosed are a signal processing method and apparatus, a storage medium and an electronic terminal, the signal processing method comprising: obtaining a scanned target set and a plurality of initial targets, and dividing into a plurality of clusters; performing signal-to-noise ratio statistical analysis and false target statistical analysis on each first cluster in the plurality of clusters, so as to remove initial targets having signal-to-noise ratios that do not satisfy standards, and also false targets; the signal processing method allows for identifying and removing initial targets having signal-to-noise ratios that do not satisfy standards, and also false targets.
A vibration test platform for an automobile generator (13), the vibration test platform comprising: a vibration table (1), a driving device (2), and a tension device (3), wherein the vibration table (1) comprises a table body (11) and a movable coil (12) located in the table body (11), and the movable coil (12) extends out of an upper end surface of the table body (11); a generator (13) is fixedly provided on the table body (11), a rotating shaft of the driving device (2) is rotatably connected to a rotor of the generator (13) by means of a belt (4), and the tension device (3) applies a first tensile force to a stator of the generator (13); and when the movable coil (12) is stationary, a second tensile force of the belt (4) on the rotor and the first tensile force are in the same straight line, and have opposite directions and equal magnitudes, and the straight line is perpendicular to a vibration direction of the movable coil (12). The vibration test platform can perform a vibration test on the generator (13) in an automobile.
A fluid cooling-based vibrating table, comprising: a pressure-bearing table body (1) and a fluid supply apparatus. The pressure-bearing table body (1) comprises a cavity (11) and a moving coil (12) located in the cavity (11), an upper housing of the cavity (11) is provided with a through hole (111), and the moving coil (12) passes through the through hole (111). The cavity (11) is provided with a driving apparatus and a cooling system, the driving apparatus may drive the moving coil (12) to vibrate up and down, and the cooling system is used to cool the cavity (11). The fluid supply apparatus receives a fluid from the cavity (11), performs a cooling treatment on the fluid, and outputs the cooled fluid to the cavity (11). A rolling sealing member (13) may isolate the cavity from an external space, so that the cavity (11) and internal components thereof may be protected.
A method for picking up a signal of a shock vibration sensor. The method comprises: sampling shock vibration signals; averaging the shock vibration signals and finding the maximum value; and determining whether the maximum value is located in the middle of data, if so, determining that data on two sides of the maximum value monotonically increases or monotonically decreases, and the increase amplitude and the decrease amplitude are substantially the same, which indicates that appropriate data is acquired, and if not, adjusting the data until a requirement is met. Signals acquired by a shock vibration sensor are processed by means of a time domain, so as to obtain shock vibration signals which meet a requirement, such that the accuracy is high, and real-time signal acquisition is realized. In addition, a result obtained by means of time-domain processing is further verified by means of a frequency domain, thereby increasing the reliability and accuracy of the acquired signals.
G01H 17/00 - Mesure des vibrations mécaniques ou des ondes ultrasonores, sonores ou infrasonores non prévue dans les autres groupes de la présente sous-classe
A decoupling mechanism (01) for a large-displacement vibration test, comprising a first transmission decoupling assembly (1), a rotating amplification assembly (3), and a second transmission decoupling assembly (2). The first transmission decoupling assembly (1) comprises a first transmission shaft (11) and a first transmission body (12) in shaft connection with the first transmission shaft (11). The second transmission decoupling assembly (2) comprises a second transmission shaft (21) and a second transmission body (22) in shaft connection with the second transmission shaft (21). The extension direction of the axis of the first transmission shaft (11) is the same as the extension direction of the axis of the second transmission shaft (21). A first connecting shaft (15) is provided between the rotating amplification assembly (3) and the first transmission body (12), and a second connecting shaft (25) is provided between the rotating amplification assembly (3) and the second transmission body (22). The extension directions of the axis of the first connecting shaft (15) and the axis of the second connecting shaft (25) are the same and perpendicular to the extension direction of the axis of the first transmission shaft (11) or the axis of the second transmission shaft (21). The vibration test device prepared by combining the decoupling mechanism (01) with a vibration exciter (02) and a sliding table assembly (03) achieves large-displacement vibration of the sliding table assembly.
A device for measuring and protecting a horizontal slide table displacement, includes: a displacement detected assembly, a displacement detection assembly and a vibration controller, wherein the displacement detected assembly vibrates synchronously with a horizontal slide table top, the displacement detection assembly is configured to measure a displacement value of the displacement detected assembly and transmit the displacement value to the vibration controller, and the vibration controller is used to control the horizontal slide table to vibrate or stop vibrating. The device can achieve the limitation and protection of the horizontal slide table displacement; and the device may be flexibly mounted on the horizontal slide table, and has characteristics such as convenient installation and simple use.
G01B 21/02 - Dispositions pour la mesure ou leurs détails, où la technique de mesure n'est pas couverte par les autres groupes de la présente sous-classe, est non spécifiée ou est non significative pour mesurer la longueur, la largeur ou l'épaisseur
24.
DRAINAGE VALVE DURABILITY TEST DEVICE AND TESTING METHOD USING DRAINAGE VALVE DURABILITY TEST DEVICE
A drainage valve durability test device (100), which is used for testing the durability of a drainage valve (200). The drainage valve comprises a valve upright column (201), a drainage plate (202) disposed within the valve upright column (201), and a drainage rotary shaft (203) which is connected to the drainage plate (202). The drainage valve durability test device (100) comprises a vibration platform (1) which provides an up-down reciprocating vibration motion and a water intake flange disk (2) which is fixed onto the vibration platform (1) so as to supply water to the drainage valve (200). The water intake flange disk (2) comprises a base disk (21) which is fixed to the vibration platform (1) and a water intake upright column (22) which is disposed on a side of the base disk (21) facing the drainage valve (200). A water inlet (221) is provided on the water intake upright column (22); the water intake upright column (22) and the valve upright column (201) are enclosingly provided to form a water intake cavity; and the water inlet (221) communicates with the water intake cavity. The drainage valve durability test device (100) has a simple structure, so that the drainage valve (200) is located in a more realistic environment, testing costs are relatively low, a loading force may be continuously provided, and measuring results are more accurate.
A vibration-centrifugation composite test apparatus and a control method thereof, the apparatus comprises: a centrifuge, an air-cooled electric vibration table and a control electrical cabinet the air-cooled electric vibration table comprises a vibration table main machine and a fan; a central axis of the moving coil in the vibration table main machine is on the same straight line as a horizontal center line of the rotation arm in the centrifuge; the fan is a horizontal fan and disposed above the center of the rotation arm, and a fan cover cabinet is mounted outside the horizontal fan; the control electrical cabinet is mounted above the fan cover cabinet, a power supply line of the control electrical cabinet is connected to a power supply through the conductive slip ring, and a vibration feedback signal line of the vibration table main machine is directly connected to the control electrical cabinet.
A radar box test device (100); the radar box test device (100) comprises an environment box body (1), a vibration table (5), a moving device (8) provided at the bottom of the vibration table (5) and used for moving the vibration table (5), a sealing bottom plate (9) fixedly provided at the top of the vibration table (5), and a wave absorbing anechoic chamber (11) provided at one side of the environment box body (1); a wave transmitting door (14) is provided at one side of the environmental box body (1) close to the wave absorbing anechoic chamber (11); the vibration table (5) has a first state in which the vibration table is far away from the environment box body (1) and a second state in which the vibration table is moved to the environment box body (1); the bottom of the environment box body (1) is exposed; and when the vibration table (5) is in the second state, the sealing bottom plate (9) is sealed with the environment box body (1). The radar box test device (100) has a good detection effect, and allows for easy mounting of test pieces.
A multifunctional comprehensive environmental test box capable of conveniently switching functions, comprising a box body (1), a gate assembly provided on the box body (1), and a load-bearing frame (7) provided on the top of the box body (1). A plurality of movement assemblies (2) are provided on the load-bearing frame (7); at least two environment assemblies for changing the internal environment of the box body (1) are provided on each movement assemblies (2); each movement assembly (2) rotates at least one environment assembly to move same to a working area of the load-bearing frame (7); and one or more environment assemblies are combined to form a test environment or multiple hybrid test environments. In the structure above, the environment assemblies are provided on the movement assemblies (2) and can be moved to required positions as needed, such that not only can the space be saved, but the number of environment assemblies required can be adjusted according to needs to adjust the internal environment of the test box, and in addition, the superposition of different environments can be achieved by combining various environment assemblies to simulate the real environments in practice, thereby improving the utilization rate of resources.
A magnetic guide structure (6, 7) of a moving coil, a vibration table having the magnetic guide structure, and an adjustment method. The magnetic guide structure comprises armatures (63) and electromagnetic coils (62) matched with the armatures (63); each electromagnetic coil (62) is energized to form a magnetic field; and a gap is formed between the electromagnetic coil (62) and each armature (63). The adjustment method comprises: S1, position collection: collecting, by means of displacement sensors (64), a distance between a moving coil (3) and a cylinder (2), and feeding back to a controller; S2, signal processing: the controller compares collected distance signals in multiple directions and calculates a difference value in each direction, and the controller calculates, according to the difference value, the current of the electromagnetic coil (62) in each direction; and S3, position adjustment: the controller outputs a current value to the electromagnetic coil (62) to adjust the position of the moving coil (3), so that the moving coil is located at a central position. The method can solve the problem that the low-frequency distortion of the moving coil (3) of the vibration table is large, also can reduce the problems that the guide structure (6, 7) is large in abrasion and large in loss, and further can solve the problem that the guide structure (6, 7) has resonant abnormal sound at a low frequency when in use.
A tilting and swaying test system, comprising a base (1), an outer ring body (2), an inner skirt body (3) and a driving mechanism, wherein the outer ring body (2) is movably connected to the base (1) along a first axis; the inner skirt body (3) is movably connected to the outer ring body (2) along a second axis, with the first axis and the second axis being in the same plane; and the driving mechanism comprises a power unit and a transmission unit, with the power unit driving the inner skirt body (3) and/or the outer ring body (2) to rotate by means of the transmission unit. The system can be applied to tilting and swaying tests for large and heavy-load test pieces.
A durability test device (100) for an engine exhaust valve (200). The device (100) is used for performing a durability test on the engine exhaust valve (200); the durability test device (100) for the engine exhaust valve (200) comprises a vibration table (110) for providing vibration motion, a uniform force connecting mechanism (140) connected to the engine exhaust valve (200), and a constant force adjustment mechanism (130) connected to the uniform force connecting mechanism (140); the engine exhaust valve (200) is connected and fixed to the vibration table (110); the constant force adjustment mechanism (130) adjusts, by means of the uniform force connecting mechanism (140), a pulling force applied to the engine exhaust valve (200). The durability test device (100) for the engine exhaust valve (200) can simulate a pressure test environment, does not require a complex test structure, and has lower test costs.
A dual-output electric vibration table, comprising a dual-output moving coil assembly (1), a magnetic circuit assembly (2) and a guide assembly, wherein the dual-output moving coil assembly (1) comprises a first moving coil (11) and a second moving coil (12); the magnetic circuit assembly (2) is arranged at the periphery of the dual-output moving coil assembly (1) and provides a magnetic field for the dual-output moving coil assembly (1); and one end of the guide assembly is connected to the dual-output moving coil assembly (1), and the other end of the guide assembly is connected to the magnetic circuit assembly (2). Compared with the prior art, the dual-output electric vibration table has the remarkable characteristics of two moving coil table surfaces, and can simultaneously fix a test piece and perform a vibration test, thereby improving the test efficiency, and same can also be widely used for simulation tests of various typical types of vibrations for stress screening of automobile parts, electronic components and aerospace products.
An integrated test device capable of loading tension or pressure and vibration, comprising a base (3), a tension/pressure excitation device (1) provided on the base (3) and used for connecting with a test piece (2), and a vibration excitation device (4) used for providing a vibration excitation source for the test piece (2); the tension/pressure excitation device (1) is composed of a power device (11) and connection mechanisms (12); there is one power device (11), and the power device is fixedly provided at one end of the base (3); there are two connection mechanisms (12), one of the connection mechanisms (12) is in transmission connection with the power device (11), the other connection mechanism (12) is provided at the other end of the base (3) corresponding to the power device (11), and the two connection mechanisms (12) are symmetrical to each other; and the test piece (2) is rigidly connected between the two connection mechanisms (12). The integrated test device can load tension or pressure and vibration stress at the same time, and can more realistically simulate the actual use condition of a product containing pre-loaded tension or pressure in a vibration environment, increasing the production environment simulation capability.
A guide device of an electric vibration table, comprising: elastic supporting blocks (11), a first fixing block (12), and at least one guide leaf spring (13). Two pressing blocks (14) are provided on each guide leaf spring (13); the pressing blocks (14) are respectively fixed to the two ends of the guide leaf spring (13); the elastic supporting blocks (11) are fixedly connected to one end of the guide leaf spring (13), and the first fixing block (12) is fixedly connected to the other end of the guide leaf spring (13). Compared with conventional guide devices, the present guide device has the features of convenient mounting and high reliability. Also provided is an electric vibration table.
B06B 1/14 - Procédés ou appareils pour produire des vibrations mécaniques de fréquence infrasonore, sonore ou ultrasonore utilisant l'énergie mécanique fonctionnant avec des systèmes impliquant des masses en mouvement alternatif les masses étant couplées élastiquement
34.
VIBRATION CENTRIFUGAL COMPOSITE TEST APPARATUS AND CONTROL METHOD THEREFOR
Disclosed are a vibration centrifugal composite test apparatus and a control method therefor. The apparatus comprises a centrifuge (1), an air-cooled electric vibration table (2) and an electrical control cabinet (3); the air-cooled electric vibration table (2) comprises a vibration table main machine (21) and a fan (22); the central axis of a moving coil (221) in the vibration table main machine (21) and the horizontal central line of a rotary arm (12) in the centrifuge are on the same straight line; the fan (22) is a horizontal fan, and is arranged at an upper portion of the center of the rotary arm (12), and a fan-covering cabinet (24) is arranged outside the horizontal fan; and the electrical control cabinet (3) is arranged above the fan-covering cabinet (24), a power line of the electrical control cabinet (3) is connected to a power supply by means of a conductive slip ring (15), and a vibration feedback signal line of the vibration table main machine (21) is directly connected to the control electrical cabinet (3). The vibration centrifugal composite test apparatus is of a reasonable structure and has a high reliability; and the control method integrates vibration and rotation control, the apparatus is comprehensively controlled by a control system, operation is convenient, and the control precision can be improved.
A horizontal sliding table (101) displacement measurement and protection device, comprising: a displacement detection component (1), a displacement detected component (2), and a vibration controller. The displacement detection component (1) and the table top (1011) of the horizontal sliding table vibrate synchronously; the displacement detected component (2) is used for measuring a displacement value of the displacement detection component (1) and transmitting the displacement value to the vibration controller; the vibration controller is used for controlling the horizontal sliding table (101) to vibrate or stop vibrating. The device can achieve limit protection of the displacement of the horizontal sliding table (101); moreover, the device can be flexibly mounted on the horizontal sliding table (101) and has the advantages of being convenient in mounting and easy and convenient in use.
G01B 21/02 - Dispositions pour la mesure ou leurs détails, où la technique de mesure n'est pas couverte par les autres groupes de la présente sous-classe, est non spécifiée ou est non significative pour mesurer la longueur, la largeur ou l'épaisseur
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