A signal processing device for a two-wire type sensor which ensures that two-wire cables can be used and an output of 4-20 mA is obtained, which are an advantage of a two-wire type configuration, while being capable of achieving high performance without sacrificing the performance. A signal processing device including a sensor and a signal converter for converting a signal detected by the sensor, in which an external cable connection part of the sensor is provided with a pair of output signal terminals for solid state pulses and a pair of power supply terminals, one of the pair of output signal terminals is connected via a certain resistance to a positive side of the power supply terminals, while the other of the pair of signal terminals and a negative side of the power supply terminals are short-circuited to each other in such a manner as to form superimposed power supply lines.
The present invention provides a signal processing device for a two-wire sensor that is capable of exhibiting high performance, without losing any capability thereof, while ensuring that a two-wire cable can be used and that a 4-20 mA output can be obtained, which are merits of a two-wire system. Provided is a signal processing device 300 that has a sensor 10 and a signal converter 100 which converts a signal detected by the sensor, wherein: a pair of output signal terminals 120 and 130 for a semiconductor pulse and a pair of power supply terminals 140 and 150 are provided to an external cable connection part 20 of the sensor; superimposed power supply lines 210 and 220 are formed in which a current consumed by a pulse output circuit is superimposed on a current consumed by the power supply terminals of the sensor with one of the pair of output signal terminals connected to the positive side of the power supply terminals via a prescribed resistance 160 and with the other of the signal terminals and the negative side of the power supply terminals short-circuited; the sensor and the signal converter are connected by the superimposed power supply lines; and the signal converter extracts, from waveforms of superimposed currents flowing through the superimposed power supply lines, only a signal 304 corresponding to a pulse output.
G08C 19/02 - Systèmes de transmission de signaux électriques dans lesquels le signal transmis est l'amplitude d'un courant ou d'une tension
H04B 3/54 - Systèmes de transmission par lignes de réseau de distribution d'énergie
G01F 1/00 - Mesure du débit volumétrique ou du débit massique d'un fluide ou d'un matériau solide fluent, dans laquelle le fluide passe à travers un compteur par un écoulement continu
G01F 1/84 - Débitmètres massiques du type Coriolis ou gyroscopique
An instrumentation device having a pulse output function for preventing breakage of a switching element even if a wrong wire is connected. A calculation unit includes: a positive power supply terminal; a negative power supply terminal; a signal terminal; a control circuit; an NPN-type transistor; a feedback circuit; a PTC thermistor; and an N-channel type MOSFET. The NPN-type transistor has a collector terminal connected to the positive power supply terminal, an emitter terminal connected to the negative power supply terminal, and a base terminal connected to the control circuit. The PTC thermistor is a resettable protection element, and is connected in series to the signal terminal. The N-channel type MOSFET has a drain terminal connected to the signal terminal through the PTC thermistor, a source terminal connected to the negative power supply terminal on a downstream side of the feedback circuit, and a gate terminal connected to the control circuit.
H03K 17/08 - Modifications pour protéger le circuit de commutation contre la surintensité ou la surtension
H03K 17/082 - Modifications pour protéger le circuit de commutation contre la surintensité ou la surtension par réaction du circuit de sortie vers le circuit de commande
G01F 1/00 - Mesure du débit volumétrique ou du débit massique d'un fluide ou d'un matériau solide fluent, dans laquelle le fluide passe à travers un compteur par un écoulement continu
G01F 3/10 - Compteurs à rotor entraîné par engrenages ou lobé
G01F 15/06 - Dispositifs d'indication ou d'enregistrement
H01C 7/02 - Résistances fixes constituées par une ou plusieurs couches ou revêtementsRésistances fixes constituées de matériaux conducteurs en poudre ou de matériaux semi-conducteurs en poudre avec ou sans matériaux isolants à coefficient de température positif
5.
INSTRUMENTATION DEVICE HAVING PULSE OUTPUT FUNCTION
Provided is an instrumentation device having a pulse output function, with which it is possible to prevent failure of a switch element even when wired incorrectly. A counting unit 1 is provided with: a positive power supply terminal 2; a negative power supply terminal 3; a signal terminal 4; a control circuit 6; an NPN-type transistor 7; a feedback circuit 8; a PTC thermistor 9; and an N-channel MOSFET 10. The collector terminal of the NPN-type transistor 7 is connected to the positive power supply terminal 2, the emitter terminal thereof is connected to the negative power supply terminal 3, and the base terminal thereof is connected to the control circuit 6. The PTC thermistor 9 is a resettable protection element and is connected in series to the signal terminal 4. The drain terminal of the N-channel MOSFET 10 is connected via the PTC thermistor 9 to the signal terminal 4, the source terminal thereof is connected to the negative power supply terminal 3 downstream of the feedback circuit 8, and the gate terminal thereof is connected to the control circuit 6.
G01F 1/32 - Mesure du débit volumétrique ou du débit massique d'un fluide ou d'un matériau solide fluent, dans laquelle le fluide passe à travers un compteur par un écoulement continu en utilisant des effets mécaniques par détection des effets dynamiques de l’écoulement utilisant des débitmètres à tourbillons
G01F 1/84 - Débitmètres massiques du type Coriolis ou gyroscopique
G01F 15/00 - Détails des appareils des groupes ou accessoires pour ces derniers, dans la mesure où de tels accessoires ou détails ne sont pas adaptés à ces types particuliers d'appareils, p. ex. pour l'indication à distance
6.
INSTRUMENTATION DEVICE HAVING PULSE OUTPUT FUNCTION
Provided is an instrumentation device having a pulse output function, with which it is possible to prevent failure of a switch element even when wired incorrectly. A counting unit 1 is provided with: a positive power supply terminal 2; a negative power supply terminal 3; a signal terminal 4; a control circuit 6; an NPN-type transistor 7; a feedback circuit 8; a PTC thermistor 9; and an N-channel MOSFET 10. The collector terminal of the NPN-type transistor 7 is connected to the positive power supply terminal 2, the emitter terminal thereof is connected to the negative power supply terminal 3, and the base terminal thereof is connected to the control circuit 6. The PTC thermistor 9 is a resettable protection element and is connected in series to the signal terminal 4. The drain terminal of the N-channel MOSFET 10 is connected via the PTC thermistor 9 to the signal terminal 4, the source terminal thereof is connected to the negative power supply terminal 3 downstream of the feedback circuit 8, and the gate terminal thereof is connected to the control circuit 6.
G01F 1/00 - Mesure du débit volumétrique ou du débit massique d'un fluide ou d'un matériau solide fluent, dans laquelle le fluide passe à travers un compteur par un écoulement continu
G01F 3/10 - Compteurs à rotor entraîné par engrenages ou lobé
G01F 15/06 - Dispositifs d'indication ou d'enregistrement
A prover includes a measurement cylinder; a hydraulic cylinder coupled with a side of a downstream end of the measurement cylinder; a measuring piston that moves through a predetermined distance from an upstream side toward a downstream side through the measurement cylinder to eject a reference volume of fluid; and a piston rod that is movably accommodated in the hydraulic cylinder, and has the measuring piston and the piston rod separately constructed. The prover includes measurement standby position stop means, and when returning the measuring piston to a predetermined measurement standby position, the piston rod moves the measuring piston from the downstream side to the upstream side and the measurement standby position stop means stops the measuring piston at the predetermined measurement standby position, after which only the piston rod is caused to move from the upstream side to the downstream side and is accommodated in the hydraulic cylinder.
G01F 1/22 - Mesure du débit volumétrique ou du débit massique d'un fluide ou d'un matériau solide fluent, dans laquelle le fluide passe à travers un compteur par un écoulement continu en utilisant des effets mécaniques par détection des effets dynamiques de l’écoulement par débitmètres à section variable
G01P 21/00 - Essai ou étalonnage d'appareils ou de dispositifs couverts par les autres groupes de la présente sous-classe
G01F 1/38 - Mesure du débit volumétrique ou du débit massique d'un fluide ou d'un matériau solide fluent, dans laquelle le fluide passe à travers un compteur par un écoulement continu en utilisant des effets mécaniques en mesurant la pression ou la différence de pression la pression ou la différence de pression étant produite par une contraction de la veine fluide la pression ou la différence de pression étant mesurée au moyen d'un élément mobile, p. ex. une membrane, un piston, un tube de Bourdon ou une capsule déformable
G01F 1/40 - Détails de structure des dispositifs de contraction de la veine fluide
G01F 25/00 - Test ou étalonnage des appareils pour la mesure du volume, du débit volumétrique ou du niveau des liquides, ou des appareils pour compter par volume
8.
Coriolis flowmeter having a cross-sectional area of channels of the manifolds enabling a reduction in pressure loss
Provided is a Coriolis flowmeter capable of achieving suppression of a pressure loss of a manifold and the like. A channel (15) of a manifold (8) includes a pipe-side opening portion (16), tube-side opening portions (17), and a channel branching portion (18) as shaping portions therefor, and the channel sectional area in a range of from the channel branching portion (18) toward the tube-side opening portions (17) is linearly decreased. A branching wall tip end (20) of a branching wall (19) extending from a position of the channel branching portion (18) to the other end of a manifold body (12) is arranged at the channel branching portion (18). The sectional shape of the channel (15) is a circular shape at a position of the pipe-side opening portion (16), and is changed to D-shapes at the position of the channel branching portion (18) by the branching wall tip end (20).
This prover (1) is provided with: a measurement cylinder (2); a hydraulic cylinder (12) coupled with a downstream-end side of the measurement cylinder (2); a measurement piston (9) which moves a prescribed distance inside the measurement cylinder (2), from an upstream side towards a downstream side, to discharge a reference volume of a fluid; and a piston rod (13) which is movably accommodated in the hydraulic cylinder (12). The measurement piston (9) and the piston rod (13) are formed separately. The prover (1) is further provided with a measurement-preparation-position stoppage means (14). When the measurement piston (9) is to be returned to a prescribed measurement-preparation position, the piston rod (13) moves the measurement piston (9) from the downstream side to the upstream side, and after the measurement-preparation-position stoppage means (14) stops the measurement piston (9) in the prescribed measurement-preparation position, only the piston rod (13) is moved from the upstream side to the downstream side and accommodated inside the hydraulic cylinder (12).
G01F 25/00 - Test ou étalonnage des appareils pour la mesure du volume, du débit volumétrique ou du niveau des liquides, ou des appareils pour compter par volume
The purpose of the present invention is to provide a coriolis flowmeter enabling, for example, reduction in pressure loss in a manifold. As the shaped portions of a channel (15) of a manifold (8), provided are a pipe-side opening portion (16), a tube-side opening portion (17), and a channel branching portion (18). The cross-sectional area of channels from the channel branching portion (18) to the tube-side opening portion (17) is linearly reduced. At the channel branching portion (18), disposed is a branching wall tip (20) of a branching wall (19) that extends from the channel branching portion to the end of a manifold body (12). The cross sectional shape of the channel (15) has a circular shape at the pipe-side opening portion (16) position, and at the channel branching portion (18) position, the cross sectional shape is changed to a D-shape by the branching wall tip (20).
The purpose of the present invention is to provide a coriolis flowmeter enabling, for example, reduction in pressure loss in a manifold. As the shaped portions of a channel (15) of a manifold (8), provided are a pipe-side opening portion (16), a tube-side opening portion (17), and a channel branching portion (18). The cross-sectional area of channels from the channel branching portion (18) to the tube-side opening portion (17) is linearly reduced. At the channel branching portion (18), disposed is a branching wall tip (20) of a branching wall (19) that extends from the channel branching portion to the end of a manifold body (12). The cross sectional shape of the channel (15) has a circular shape at the pipe-side opening portion (16) position, and at the channel branching portion (18) position, the cross sectional shape is changed to a D-shape by the branching wall tip (20).
A piston prover comprises a measurement cylinder; a hydraulic cylinder coupled with a downstream end of the measurement cylinder; a measuring piston that moves a predetermined distance through the measurement cylinder during a measurement due to a fluid flow to eject a reference volume of fluid; and a piston rod that is movably in the hydraulic cylinder, wherein the measuring piston and the piston rod are separately constructed. When returning the measuring piston to a predetermined upstream measurement standby position, the piston rod moves the measuring piston to set the measuring piston at the predetermined measurement standby position, and thereafter only the piston rod is moved from upstream to downstream and is accommodated in the hydraulic cylinder.
G01F 25/00 - Test ou étalonnage des appareils pour la mesure du volume, du débit volumétrique ou du niveau des liquides, ou des appareils pour compter par volume
14.
Field equipment photoelectric sensing sensitivity adjustment
A photoelectric sensing sensitivity adjusting device includes: an LED for emitting light by being supplied with energy (current or voltage); a regulator for LED driving for supplying the energy to the LED; a light receiving device for receiving the light emitted from the LED; a digital potentiometer for controlling increase or decrease of the energy to be supplied to the LED; a CPU for digitally controlling, according to a control program, the increase or decrease of the energy to be supplied to the LED; and a photodetection portion for detecting an optical signal, converting the optical signal to an electrical signal, and outputting the electrical signal.
H05B 33/08 - Circuits pour faire fonctionner des sources lumineuses électroluminescentes
H03K 17/94 - Commutation ou ouverture de porte électronique, c.-à-d. par d'autres moyens que la fermeture et l'ouverture de contacts caractérisée par la manière dont sont produits les signaux de commande
15.
Maintenance expert system for measuring instrument
Provided is a measuring instrument for measuring an object to be measured, including: a CPU (9) including a plurality of internal timer counters and having a function of calculating a measured value of the object to be measured based on detection values of various sensors; a power supply circuit (3) for supplying power to the CPU (9); a detector (4) for detecting a state of the object to be measured; a display unit (5) for displaying detection input data input from the various sensors and the state of the object to be measured, which is obtained through a calculation; a real-time clock IC (RTC) (11) for measuring an elapsed time; an EEPROM (12) for storing data input to the CPU (9); and an FeRAM (13) for storing input values from the various sensors, and storing a calculation result obtained through a calculation performed by the CPU (9) based on the input values from the various sensors.
G01D 3/00 - Dispositions pour la mesure prévues pour les objets particuliers indiqués dans les sous-groupes du présent groupe
G01F 25/00 - Test ou étalonnage des appareils pour la mesure du volume, du débit volumétrique ou du niveau des liquides, ou des appareils pour compter par volume
G01F 1/84 - Débitmètres massiques du type Coriolis ou gyroscopique
G01D 3/08 - Dispositions pour la mesure prévues pour les objets particuliers indiqués dans les sous-groupes du présent groupe avec dispositions pour protéger l'appareil, p. ex. contre les fonctionnements anormaux, contre les pannes
G01K 1/02 - Moyens d’indication ou d’enregistrement spécialement adaptés aux thermomètres
Disclosed is a piston prover which enables smooth movement of a measuring piston through a measurement cylinder without applying more than necessary load to the measuring piston and which has a simplified structure with reduced parts count. The piston prover (1) includes the measurement cylinder (2) provided with an upstream end (3) and a downstream end (4); a hydraulic cylinder (12) coupled to the downstream end of the measurement cylinder (2); the measuring piston (9) which during measurement, a fluid drawn from the upstream end (3) causes to move by a predetermined distance from upstream towards downstream through the measurement cylinder (2) to displace a specified volume of fluid; and a piston rod (13) accommodated movably in the hydraulic cylinder (12). The measuring piston (9) and the piston rod (13) are separately constructed, in which to allow the measuring piston (9) to return to a predetermined upstream measurement standby position, the piston rod (13) moves the measuring piston (9) from downstream towards upstream to set the measuring piston (9) at the predetermined measurement standby position, and thereafter, the piston rod (13) is accommodated in the hydraulic cylinder (12).
G01F 25/00 - Test ou étalonnage des appareils pour la mesure du volume, du débit volumétrique ou du niveau des liquides, ou des appareils pour compter par volume
17.
Signal processing method, signal processing apparatus, and Coriolis flowmeter
A signal processing method for a Coriolis flowmeter including: performing frequency conversion to combine an oscillation frequency to each of two flow rate signals obtained by A/D conversion on input signals of the phase difference and/or the vibration frequency proportional to the Coriolis force acting on the at least one flow tube; measuring a frequency of a composite waveform associated with at least one of the vibration detection sensors; transmitting a control signal based on the measured frequency; controlling so that a sum frequency component or a difference frequency component of a composite component of a composite frequency signal is constant; and measuring phases from a sum signal or a difference signal of each of controlled converted composite frequencies, to thereby obtain a phase difference signal component.
G01F 1/00 - Mesure du débit volumétrique ou du débit massique d'un fluide ou d'un matériau solide fluent, dans laquelle le fluide passe à travers un compteur par un écoulement continu
18.
SIGNAL PROCESSING METHOD, SIGNAL PROCESSING DEVICE, AND CORIOLIS FLOW METER.
Disclosed are a coriolis flow meter, a signal processing device, and a signal processing method which, even if the temperature of the fluid to be measured changes, if the fluid to be measured becomes contaminated with bubbles, or if the fluid to be measured has rapidly changed from a gas to a liquid, are capable of always measuring with constant precision, have a high filtering capacity, and can carry out phase measurement with low computational complexity. A coriolis flow meter wherein the phase difference and/or the vibration frequency proportional to the coriolis force acting on at least one or a pair of flow tubes is detected, and the mass flow rate and/or the density of the liquid to be measured is obtained, is provided with: an A/D convertor which converts analogue signals inputted from each of a pair of vibration detection sensors to digital signals; a frequency measurer which measures the vibration frequency (θ) of the flow tubes; a transmitter which generates a frequency signal at the frequency θ (1-1/N) of the digital frequency signal outputted from the frequency measurer; and a pair of orthogonal frequency converters which use the signal generated by the transmitter to frequency convert each of a pair of digital signals which correspond to the pair of vibration detection sensors and are output from the A/D converter, and generate a digital signal at a frequency of 1/N. The flow meter uses the signal generated by the orthogonal frequency converters to obtain the phase difference.
In a Coriolis flowmeter, at least one flow tube or a pair of flow tubes in a measurement flow tube is alternately driven and at least one of a phase difference and a vibration frequency proportional to a Coriolis force acting on the flow tubes is detected by a velocity sensor or acceleration sensor, to thereby obtain a mass flow rate and a density of a fluid to be measured. A signal processing apparatus for the Coriolis flowmeter comprises a transmitter for transmitting a frequency signal which is modulatable; and a frequency conversion section for performing frequency conversion to add or subtract an output frequency F x from the transmitter to or from an input frequency detected by the velocity sensor or acceleration sensor and shifting a frequency value obtained by the frequency conversion to a constant value.
Disclosed is a signal processing device which is always capable of measurement with constant precision, even if the temperature of the fluid to be measured changes, if the fluid to be measured becomes contaminated with bubbles, or if the fluid to be measured has rapidly changed from a gas to a liquid, and which can carry out phase and density measurement with low computational complexity. In a coriolis flow meter at least one or a pair of flow tubes which constitute a flow tube for measurement are driven by a drive device to operate a vibrator, and the flow tubes are alternately driven, and vibrated, thus the phase difference and/or the vibration frequency proportional to the coriolis force acting on the flow tubes is detected by means of a speed sensor or an acceleration sensor which is a vibration detection sensor, and the mass flow rate and/or the density of the liquid to be measured can be obtained. The coriolis flow meter is formed from: a transmitter (90) which transmits and outputs a frequency signal which can be modulated; and a frequency conversion unit (85) which performs an addition (or a subtraction) on the input frequency as detected by the speed sensor or the acceleration sensor, and the output frequency (Fx) of the transmitter (90), and performs a frequency conversion, then performs frequency shift so that the post-frequency conversion frequency value is always constant.
A photoelectric sensing sensitivity adjustment device comprises: an LED for receiving a supply of energy (current or voltage) and emitting light; an LED drive regulator for supplying energy to the LED; a light-receiving device for receiving light that is emitted from the LED; a digital potentiometer for controlling the increase/decrease of energy supplied to the LED; a CPU for digitally controlling the increase/decrease of energy supplied to the LED in accordance with a control program; and a photodetection unit for detecting an optical signal, converting the optical signal to an electrical signal, and outputting the electrical signal.
H03K 17/78 - Commutation ou ouverture de porte électronique, c.-à-d. par d'autres moyens que la fermeture et l'ouverture de contacts caractérisée par l'utilisation de composants spécifiés par l'utilisation, comme éléments actifs, de dispositifs opto-électroniques, c.-à-d. des dispositifs émetteurs de lumière et des dispositifs photo-électriques couplés électriquement ou optiquement
G01F 1/00 - Mesure du débit volumétrique ou du débit massique d'un fluide ou d'un matériau solide fluent, dans laquelle le fluide passe à travers un compteur par un écoulement continu
A measuring instrument for measuring an object to be measured is configured by a CPU (9) which is provided with a plurality of internal timer counters and has a function of calculating the measurement value of the object to be measured on the basis of detection values from various sensors, a power supply circuit (3) which supplies power to the CPU (9), a detector (4) which detects the state of the object to be measured, a display unit (5) which displays detection input data from the various sensors and the state of the object to be measured that is obtained by the calculation, a real-time clock IC (RTC) (11) which measures the elapsed time, an EEPROM (12) which stores data inputted to the CPU (9), and an FeRAM (13) which stores input values from the various sensors and stores a calculation result calculated by the CPU (9) on the basis of the input values from the various sensors.
G01F 1/84 - Débitmètres massiques du type Coriolis ou gyroscopique
G01K 1/14 - SupportsDispositifs de fixationDispositions pour le montage de thermomètres en des endroits particuliers
G06Q 50/00 - Technologies de l’information et de la communication [TIC] spécialement adaptées à la mise en œuvre des procédés d’affaires d’un secteur particulier d’activité économique, p. ex. aux services d’utilité publique ou au tourisme
Provided is a positive displacement gas-liquid two-phase flowmeter for, when measuring the respective flow rates of a gas-liquid two-phase flow comprising liquid and gas, accurately measuring the flow rates in a wide flow rate range by a compact and robust structure that is less susceptible to the flow pattern. A positive displacement gas-liquid two-phase flowmeter (10) measures the total gas-liquid flow rate (QM) of a gas-liquid two-phase flow comprising liquid and gas, and the ratio (gas void fraction (β)) of the gas flow rate to the total gas-liquid flow rate, and calculates the respective flow rates of the liquid and the gas on the basis of the total gas-liquid flow rate (QM) and gas void fraction (β). The positive displacement gas-liquid two-phase flowmeter (10) is provided with a positive displacement flow rate measurement chamber (16) for measuring the total gas-liquid flow rate (QM) and provided with a gas-liquid mixing chamber (14) for mixing the liquid and the gas in the gas-liquid two phase flow at a stage preceding the positive displacement flow rate measurement chamber (16).
A signal processing method for a Coriolis flowmeter including: performing frequency conversion of a first digital signal, the frequency conversion performed on the first digital signal modulating the frequency of the first digital signal so that the frequency of the first digital signal after the frequency conversion is 1/Nth of the frequency of the first digital signal before the frequency conversion, where N is an integer; performing frequency conversion of a second digital signal, the frequency conversion performed on the second digital signal modulating the frequency of the second digital signal so that the frequency of the second digital signal after the frequency conversion is 1/Nth of the frequency of the second digital signal before the frequency conversion; and measuring a phase difference between (i) the frequency converted first digital signal and (ii) the frequency converted second digital signal.
G01F 1/00 - Mesure du débit volumétrique ou du débit massique d'un fluide ou d'un matériau solide fluent, dans laquelle le fluide passe à travers un compteur par un écoulement continu
G01F 1/80 - Débitmètres massiques directs fonctionnant en mesurant la pression, la force, le couple ou la fréquence d'un écoulement de fluide auquel a été donné un mouvement de rotation
25.
Signal processing method, signal processing apparatus, and Coriolis flowmeter
A signal processing method for a Coriolis flowmeter, the signal processing method including: measuring a frequency of a first digital signal obtained by converting a first input signal from one of a pair of vibration detection sensors into the first digital signal; transmitting a modulatable frequency signal based on the measured frequency of the first digital signal; performing frequency conversion to add or subtract the frequency of the modulatable frequency signal to or from the frequency of the first digital signal; performing frequency conversion to add or subtract the frequency of the modulatable frequency signal to or from the frequency of a second digital signal obtained by converting a second input signal from the other one of the pair of vibration detection sensors into the second digital signal; and measuring a phase difference between (i) the frequency converted first digital signal and (ii) the frequency converted second digital signal.
G01F 1/00 - Mesure du débit volumétrique ou du débit massique d'un fluide ou d'un matériau solide fluent, dans laquelle le fluide passe à travers un compteur par un écoulement continu
G01F 1/80 - Débitmètres massiques directs fonctionnant en mesurant la pression, la force, le couple ou la fréquence d'un écoulement de fluide auquel a été donné un mouvement de rotation
G01F 1/84 - Débitmètres massiques du type Coriolis ou gyroscopique
A value of a line-to-line resistor (24) is determined by subtracting a resistance value determined as a product of a voltage ratio based on divided voltages and a value of a reference resistor in a non-conductive state between a second electric wire (26) and a third electric wire (27) from a resistance value determined as a product of a voltage ratio based on the divided voltages and the value of the reference resistor in a conductive state therebetween. Once the value of the line-to-line resistor (24) is determined, it becomes possible to determine a compensated resistance value related to temperature.
G01F 1/69 - Dispositions de structureMontage des éléments, p. ex. relativement à l'écoulement de fluide utilisant un élément de chauffage, de refroidissement ou de détection d'un type particulier du type à résistance
A drive device for operating an electromagnetic oscillator includes an OP amplifier for amplifying an analog input signal from an electromagnetic pick-off and an A/D converter for converting an analog signal output from the OP amplifier into a digital signal. The drive device also includes a D/A converter for converting, after digital processing performed by a DSP on the digital signal output from the A/D converter based on phase detection, a digital signal having a processed data amount into an analog signal, and a D/A converter for converting, after the digital processing performed by the DSP on the digital signal output from the D/A converter based on the phase detection, a digital signal having a processed data amount into an analog signal.
In a Coriolis flowmeter, a vibrator vibrates flow tubes. A phase difference and/or a vibration frequency proportional to a Coriolis force acting on the flow tubes are/is detected by vibration detection sensors to obtain a mass flow rate and/or density of the fluid to be measured. The Coriolis flowmeter measures a frequency based on an input signal frequency of one of the sensors, of two flow rate signals obtained by A/D conversion on detection signals from a pair of the vibration detection sensors, transmits by a transmitter a desired frequency signal based on the measured frequency, adds or subtracts detection frequencies from the pair of the vibration detection sensors to or from an output frequency of the transmitter to perform frequency conversion, and measures a phase difference between respective frequency signals which are detected by the pair of the vibration detection sensors and obtained by the frequency conversion.
Disclosed is a Coriolis flowmeter, in which a vibrator is actuated to vibrate at least one or a pair of flow tubes (2 and 3) so that a phase difference and/or a vibration frequency proportional to a Coriolis force acting on the flow tubes (2 and 3) is detected by a vibration detection sensor, to thereby acquire the mass flow rate and/or the density of a fluid to be measured. The Coriolis flowmeter comprises: a frequency meter (110) for measuring a frequency on the basis of an input signal frequency of one sensor in two frequency signals acquired by A/D-converting detection signals from a pair of vibration detection sensors (7 and 8); a transmitter (120) for transmitting and outputting a desired frequency signal on the basis of the measured frequency; frequency conversion units (130 and 140) for adding (or subtracting) a frequency detected by the pair of vibration detection sensors (7 and 8) and an output frequency of the transmitter (120), to thereby convert the detected frequency and the output frequency individually; and a phase difference measuring unit (150) for measuring the phase difference of the individual frequency signals which are to be converted by the frequency conversion units (130 and 140) and are detected by the pair of vibration detection sensors (7 and 8).
A Coriolis flowmeter obtains the mass flow rate and/or density of a fluid to be measured by detecting the phase difference and/or vibration frequency proportional to Coriolis force acting on at least one or a pair of flow tubes. The Coriolis flowmeter is provided with an A/D converter for converting analog signals outputted from speed sensors or acceleration sensors which serve as a pair of vibration detection sensors into digital signals, a pair of orthogonal frequency converters for frequency-converting the digital signals corresponding to the pair of vibration detection sensors, a frequency measuring instrument for measuring the frequency on the basis of either of the digital signals outputted from the pair of vibration detection sensors, and a transmitter for generating a frequency signal that is θ(1-1/N) of a digital frequency signal, wherein the phase difference is obtained by using the signals generated by the orthogonal frequency converters.
Disclosed is a Coriolis flowmeter, in which at least one or a pair of flow tubes constituting a measuring flow tube is alternately driven by actuating a vibrator by a drive unit, and in which the flow tube is vibrated so that a phase difference and/or a vibration frequency proportional to a Coriolis force acting on the flow tube are detected by a velocity sensor or an acceleration sensor acting as a vibration detection sensor, to thereby acquire the mass flow rate and/or the density of a fluid to be measured. The Coriolis flowmeter comprises: a transmitter (90) for transmitting and outputting a modulative frequency signal; a frequency converter (85) for adding (or subtracting) and frequency-converting an input frequency from an input signal of the phase difference and/or the vibration frequency detected by an electromagnetic pick-off and acting on the pair of flow tubes and an output frequency (FX) of the transmitter (90), to thereby control the transmitter (90) so that the frequency-converted frequency value may be constant; and a phase-difference measuring unit (95) for measuring the phase difference of the converted frequency signal outputted from the frequency converter (85).
A drive device for operating an electromagnetic oscillator is formed by: an OP amplifier which amplifies an analog input signal from an electromagnetic pickoff; an A/D converter which converts the analog signal outputted from the OP amplifier into a digital signal; a D/A converter which performs a digital process on the digital signal outputted from the A/D converter in accordance with a phase detection in a DSP and converts the digital signal of the data amount into an analog signal; and a D/A converter which performs a digital process on the digital signal outputted from the D/A converter in accordance with a phase detection in the DSP and converts the digital signal of the data amount into an analog signal.
A torque limiter which can detect torque of both opening and closing of a valve and in which different torque values for opening and closing of the valve can be easily set. The torque limiter (17) is provided with a torque arm (171) having a connection section (171b) which is connected to a drive side gear (24) and an intermediate gear (23) and also having an arm section (171a) projecting from the connection section (171b); an opening spring means (172) and a closing spring means (173) which apply spring force balancing with force acting, in proportion to torque of a load in opening and closing operation of the valve, in the direction of a tangential line at the meshing point of the intermediate gear (23); an opening torque detecting switch (175) and a closing torque detecting switch (174) which are, when torque of a load in opening and closing operation of the valve exceeds a predetermined value, operated by the arm section (171a); and a torque limiter shaft (176) passed through the opening and closing spring means (172, 173). The torque limiter shaft (176) is adapted such that spring force of each of the opening and closing spring means (172, 173) can be adjusted from an end of the torque limiter shaft (176).
An axial flow positive displacement flowmeter capable of reducing pressure loss, manufacturable at low cost, and having high accuracy. The axial flow positive displacement flowmeter (1) comprises a pair of rotors (10) of a same shape and a same size with different torsional directions, a casing (4) in which the rotors (10) are housed, an inlet side cover (2) for sealing the inflow side end of the casing (4), an inlet port (21) formed in the flange (22) of an inlet side cover (2), an outlet side cover (3) for sealing the outlet side end of the casing (4), and an outlet port (31) formed in the flange (32) of the outlet side cover (3). The inlet port (21) and the outlet port (31) are arranged in alignment with each other along the flowing direction of a fluid to be metered.
A gap (39) is so formed that, even if dew condensation occurs therein, the water content is released therethrough by the weight of the dew condensation and by a negative pressure applied thereto from a fluid to be measured which flows through a measurement pipe. The gap (39) communicates with a transmitting/receiving space (41) for transmitting/receiving an ultrasonic. A plurality of projections are disposed on the outer surface of the other end part (45) at equal pitches to keep the state of the gap (39). A plurality of housing through-holes (42) are so formed inside a housing (35) as to extend through the inner surface and the outer surface thereof.
H04R 1/02 - BoîtiersMeublesMontages à l'intérieur de ceux-ci
G01F 1/66 - Mesure du débit volumétrique ou du débit massique d'un fluide ou d'un matériau solide fluent, dans laquelle le fluide passe à travers un compteur par un écoulement continu en mesurant la fréquence, le déphasage, le temps de propagation d'ondes électromagnétiques ou d'autres types d'ondes, p. ex. en utilisant des débitmètres à ultrasons
A volumetric flowmeter (1) is equipped with a detachable pump unit (2), a main body casing (3) accommodating the pump unit (2), and a cover member (4). The main body casing (3) is equipped with a front side main body casing (8) accommodating the pump unit (2) and integrated with a differential pressure detector (6), and a rear side main body casing (10) connected to the front side main body casing (8) and allowing mounting therewithin of a servomotor (9) constituting a main body of a shaft driving unit (5). The pump unit (2) is inserted into a unit accommodating recess (11) of the front side main body casing (8) and is then covered with the cover member (4) to be thereby completely accommodated.
G01F 3/14 - Mesure du débit volumétrique des fluides ou d'un matériau solide fluent dans laquelle le fluide passe à travers le compteur par quantités successives et plus ou moins séparées, le compteur étant entraîné par l'écoulement avec des chambres de mesure qui se dilatent ou se contractent au cours du mesurage ayant des parois rigides mobiles comprenant des pistons animés d'un mouvement alternatif, p. ex. se déplaçant d'un mouvement alternatif dans un corps tournant
G01F 1/34 - Mesure du débit volumétrique ou du débit massique d'un fluide ou d'un matériau solide fluent, dans laquelle le fluide passe à travers un compteur par un écoulement continu en utilisant des effets mécaniques en mesurant la pression ou la différence de pression
37.
Path structure related to flow of fluid to be measured and pressure difference detection in servo type volumetric flowmeter
One pressure difference detection connecting path (71) and another pressure difference detection connecting path (72) are formed so as to be arranged at a predetermined interval in a longitudinal direction. Further, the one pressure difference detection connecting path (71) is formed so as to be connected in front of a continuation center position (70) of a second inflow path (67) and a first inflow path (43). Further, the other pressure difference detection connecting path (72) is formed so as to be connected behind a continuation center position (69) of a second outflow path (66) and a first outflow path (44).
G01F 3/14 - Mesure du débit volumétrique des fluides ou d'un matériau solide fluent dans laquelle le fluide passe à travers le compteur par quantités successives et plus ou moins séparées, le compteur étant entraîné par l'écoulement avec des chambres de mesure qui se dilatent ou se contractent au cours du mesurage ayant des parois rigides mobiles comprenant des pistons animés d'un mouvement alternatif, p. ex. se déplaçant d'un mouvement alternatif dans un corps tournant
G01F 1/34 - Mesure du débit volumétrique ou du débit massique d'un fluide ou d'un matériau solide fluent, dans laquelle le fluide passe à travers un compteur par un écoulement continu en utilisant des effets mécaniques en mesurant la pression ou la différence de pression
A line-to-line resistance (24) is obtained by subtracting a resistance value, which is obtained by multiplying a voltage ratio based on divided voltages in a nonconductive state between a second electric line (26) and a third electric line (27) by a reference resistance, from a resistance value obtained by multiplying a voltage ratio based on divided voltages in a conductive state therebetween by the reference resistance. Obtaining the line-to-line resistance (24) allows a temperature-related, compensated resistance value to be obtained.
G01K 7/20 - Mesure de la température basée sur l'utilisation d'éléments électriques ou magnétiques directement sensibles à la chaleur utilisant des éléments résistifs l'élément étant une résistance linéaire, p. ex. un thermomètre à résistance de platine dans un circuit spécialement adapté, p. ex. un circuit en pont
G01F 1/00 - Mesure du débit volumétrique ou du débit massique d'un fluide ou d'un matériau solide fluent, dans laquelle le fluide passe à travers un compteur par un écoulement continu
An ideal volumetric flowmeter which has a pair of helical gears given by using oval pitch curve as reference rack tooth profile, with the tooth height ratio of the reference rack tooth profile even with a small number of teeth being set to ꧀m/4 which is a logical limit for the tooth height ratio of a one-point continuous contact tooth profile and which has no confinement phenomenon between tooth profiles. The volumetric flowmeter has a pair of helical rotors (1, 2) in a casing (3). The reference rack tooth profile of the pair of helical rotors (1, 2) is an oval pitch curve of two or less leaves. The moving radius of the oval pitch curve is expressed by ρ=a/(1-bcosnϑ), where ρ is a moving radius which is a distance between the center of rotation and the oval pitch curve, 旜a” is a similarity factor, 旜b” is a degree of flatness, n (n≤2) is the number of leaves, and ϑ is an argument. The tooth height ratio (h) can be expressed by h=a/(1-b)-g0, where g0 is a distance between the poles of the oval pitch curve and the pitch line, wherein by g0=acosϑ0/(1-bcosnϑ0). Values for the similarity factor 旜a”, the degree of flatness 旜b”, and the distance g0 are determined so that the tooth height ratio (h) may be ꧀m/4.
09 - Appareils et instruments scientifiques et électriques
Produits et services
Automatic control valves, ball valves, angle valves, cocks,
butterfly valves, other valves; air turbines; compressed air
engines. Power distribution or control machines and apparatus;
telecommunication machines and apparatus; electronic
machines and apparatus.
41.
Multiphase flowmeter for measuring each phase flow rate of a three-phase flow consisting of gas and two kinds of liquid
In order to extract a part of a three-phase flow from a pipe line, a pair of communication pipes, which are connected to upstream and downstream sides of an orifice provided in the pipe line, and a gas-liquid extraction tank are used. Flowing of a slag flow or the like into the pipe line causes a periodical change in a pressure difference between input and output sides of the orifice. This causes extraction of gas-liquid and discharge mainly of gas to be simultaneously effected in the pair of communication pipes and the gas-liquid extraction tank. Within the gas-liquid extraction tank, the gas-liquid is forcibly shaken horizontally, vertically, etc. for agitating, whereby gas-liquid of high liquid-phase rate remains. Then, the gas is removed from this gas-liquid of high liquid-phase rate to thereby extract mixture liquid, which is accumulated in a liquid storage tank. The mixture liquid flows from the liquid storage tank in an amount required at a Coriolis meter. As a result, high precision density measurement is performed at the Coriolis meter.
G01F 1/74 - Dispositifs pour la mesure du débit d'un matériau fluide ou du débit d'un matériau solide fluent en suspension dans un autre fluide
G01N 9/32 - Recherche du poids spécifique ou de la densité des matériauxAnalyse des matériaux en déterminant le poids spécifique ou la densité en utilisant les propriétés d'écoulement des fluides, p. ex. l'écoulement à travers des tubes ou des ouvertures
A positive displacement flowmeter having a pair of non-circular gears in a rolling contact on a pitch line without slippage. The positive displacement flowmeter comprises a casing (3) and a pair of rotors (1, 2) provided in the casing (3) and rotatable around its center axes (4, 5). The pair of rotors (1, 2) have a tooth profile curve which is an oval pitch curve itself having a trajectory of contact points on the pitch line, and they satisfy a condition of r1+r2=K=const r1 dθ1=r2 dθ2, and a moving radius of the oval pitch curve is given by ri=a/(1-bcosnθi)(i=1,2), where “ri(i=1, 2)” is the moving radius that is a distance from a center of rotation to the oval pitch curve, “a” is a homothetic coefficient, “b” is a flatness, “n” is a number of lobes, and “θi(i=1, 2)” is a moving angle.
A converter pulse width shaping circuit (6) according to the present invention is provided between a waveform shaping apparatus (4) and an erroneous output preventing apparatus (5) that are provided between a flow rate detecting portion (1) and a flow rate metering mechanism (3). When high frequency pulse signals of a frequency not lower than a predetermined value are successively input, the converter pulse width shaping circuit (6) combines those high frequency pulse signals to convert them to a low frequency pulse signal, which is then output to the erroneous output preventing apparatus (5) having a low-cut function. In the present invention, a vortex flow meter is made up of a converter (2) including the converter pulse width shaping circuit (6) described above.
G01F 1/32 - Mesure du débit volumétrique ou du débit massique d'un fluide ou d'un matériau solide fluent, dans laquelle le fluide passe à travers un compteur par un écoulement continu en utilisant des effets mécaniques par détection des effets dynamiques de l’écoulement utilisant des débitmètres à tourbillons
09 - Appareils et instruments scientifiques et électriques
Produits et services
Flow meters; densimeters; gasometers; water meters; capacity
measures; calorimeters; densitometers; viscosimeters;
electrical control panels; electric installation for the
remote control on industrial operations; gasoline station
equipment.
09 - Appareils et instruments scientifiques et électriques
Produits et services
Flow meters; densimeters; gasometers; water meters; capacity measures, namely, volumetric flow meters, massmetric flow meters; calorimeters; densitometers; viscosimeters; [ electrical control panels; electric installation for the remote control on industrial operations; ] gasoline station equipment, namely, leak detectors for gasoline pumps, metered gasoline pumps
46.
PATH STRUCTURE FOR FLOW AND DIFFERENTIAL-PRESSURE DETECTIONS IN SERVO-TYPE DISPLACEMENT FLOWMETER
One differential-pressure detecting conduit (71) and the other differential-pressure detecting conduit (72) are so formed as are juxtaposed at a predetermined spacing in the longitudinal direction. Moreover, the one differential-pressure detecting conduit (71) continues upstream of a continuing center position (70) between a second inflow passage (67) and a first inflow passage (43). Still moreover, the other differential-pressure detecting conduit (72) continues downstream of a continuing center position (69) between a second outflow passage (66) and a first outflow passage (44).
Provided is a displacement flowmeter (1) which is constituted to comprise a removable pump unit (2), a body casing (3) for housing the pump unit (2), and a cover member (4). The body casing (3) is constituted to include a front body casing (8) having a structure for housing the pump unit (2) and a structure for integrating differential-pressure detecting means (6), and a rear body casing (10) connected to the front body casing (8) for mounting therein a servomotor (9) to become the body of shaft driving means (5). The pump unit (2) is inserted into a unit housing recess (11) of the front body casing (8), and is then covered with the cover member (4) so that it is completely housed.
In order to extract a part of three-phase flow from a pipe line (23), a pair of communication pipes (13), which are connected to upper and lower streams of an orifice (12) provided in the pipe line (23), and a gas-liquid extraction tank (14) are used. The flow of slag stream or the like into the pipe line (23)causes a periodical change in a pressure difference between before and after the orifice (12). This causes the extraction of gas and liquid and the discharge of mainly gas to be simultaneously carried out in the pair of communication pipes (13) and the gas-liquid extraction tank (14). In the gas-liquid extraction tank (14), the gas and liquid are forcibly shaken, for example, leftward, rightward, upward, and downward for stirring, whereby a gas-liquid mixture, in which the proportion of the liquid phase is higher, stays. The mixed liquid is extracted to remove gas from the gas-liquid mixture in which the proportion of the liquid phase is higher, followed by storage in a liquid storage tank (17). The mixed liquid in an amount necessary in a coriolis meter (38) is flown from the liquid storage tank (17). As a result, in the coriolis meter (38), the density can be measured with high accuracy.
G01F 1/74 - Dispositifs pour la mesure du débit d'un matériau fluide ou du débit d'un matériau solide fluent en suspension dans un autre fluide
G01F 1/00 - Mesure du débit volumétrique ou du débit massique d'un fluide ou d'un matériau solide fluent, dans laquelle le fluide passe à travers un compteur par un écoulement continu
G01F 1/10 - Mesure du débit volumétrique ou du débit massique d'un fluide ou d'un matériau solide fluent, dans laquelle le fluide passe à travers un compteur par un écoulement continu en utilisant des effets mécaniques en utilisant des aubes tournantes avec admission axiale
G01F 1/84 - Débitmètres massiques du type Coriolis ou gyroscopique
G01F 5/00 - Mesure d'une fraction du débit volumétrique
G01F 15/08 - Séparateurs d'air ou de gaz en combinaison avec des compteurs de liquidesSéparateurs de liquide en combinaison avec des compteurs de gaz
09 - Appareils et instruments scientifiques et électriques
Produits et services
Flow meters, densimeters, gasometers, water meters, capacity
measures, calorimeters, densitometers, viscosimeters,
electrical control panels, electric installation for the
remote control on industrial operations.
09 - Appareils et instruments scientifiques et électriques
Produits et services
Flow meters, densimeters, gasometers, water meters, capacity
measures, calorimeters, densitometers, viscosimeters,
electrical control panels, electric installation for the
remote control on industrial operations.
A first inlet portion 4, a second inlet portion 6, a first outlet portion 5, and a second outlet portion 7 are fixed to a fixing member 8, and a connecting tube portion 9 is provided between the first outlet portion 5 and the second inlet portion 6. Further, the first inlet portion 4 and the second inlet portion 6 are arranged in a non-parallel state such that the distance between the two increases as they depart from the fixing member 8, and the first outlet portion 5 and the second outlet portion 7 are similarly arranged in a non-parallel state, the first inlet portion 4 and the second inlet portion 6 and the first outlet portion 5 and the second outlet portion 7 being arranged symmetrically. Further, the first outlet portion 5, the second inlet portion 6, and the connecting tube portion 9 are arranged such that their three tube axes are in a straight line.
09 - Appareils et instruments scientifiques et électriques
Produits et services
Flow meters, [densimeters,] gasometers, water meters, calorimeters, [densitometers, viscosimeters] and capacity measures, namely, volumetric flow meters, massmetric flow meters and calibration instruments for all the foregoing
09 - Appareils et instruments scientifiques et électriques
Produits et services
Flow meters, densimeters, gasometers, water meters, capacity
measures, calorimeters, densitometers, viscosimeters,
electrical control panels, electric installation for the
remote control on industrial operations.
09 - Appareils et instruments scientifiques et électriques
Produits et services
Measuring instruments, namely, liquid, gaseous and steam flowmeters, [ densimeters, gasometers, ] water meters [, calorimeters, densitometers, viscosimeters ] ; capacity measures, namely, volumetric flow meters, massmetric flow meters and calibration instruments for all the foregoing; electrical control panels, electric installations for the remote control of industrial operations, namely, batch counter, flow indicator or totalizer, flow converter and compensator, in-line batch blender, portable pulse checker, converter plug-ins, flow controller, flow computer, pulse scaler, pulse divider, pulse adder/subtractor, pc connector, communication interface box, handheld communicator and computer software for instructing installation, usage and operation of the installation
09 - Appareils et instruments scientifiques et électriques
Produits et services
Flow meters, densimeters, gasometers, water meters, capacity
measures, calorimeters, densitometers, viscosimeters,
electric installation for the remote control of industrial
operations.
09 - Appareils et instruments scientifiques et électriques
Produits et services
Flow meters, densimeters, gasometers, water meters, capacity
measures, calorimeters, densitometers, viscosimeters,
electric installation for the remote control of industrial
operations.
09 - Appareils et instruments scientifiques et électriques
Produits et services
(1) Flow meters, densimeters, gasometers, water meters, capacity measures, calorimeters, densitometers, viscosimeters, electrical control panels, electric installation for the remote control on industrial operations, namely batch counter, flow indicator or totalizer, flow converter and compensator, in-Iine batch blender, portable pulse checker, converter plug-ins, flow controller, flow computer; handheld or other portable computer communicators for process control and data management of the foregoing wares, namely, for use in selecting, engineering, configuring, monitoring, diagnosing, adjusting, maintaining and/or repairing the foregoing wares and for accessing and maintaining records on the foregoing wares; and handheld or other portable computer communicators equipped with supervisory computer process solutions software and communications capability, interconnected to the foregoing wares for process control applications.
