WO2019027339A1 - Dispositif pour mesurer le débit d'un milieu liquide - Google Patents

Dispositif pour mesurer le débit d'un milieu liquide Download PDF

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Publication number
WO2019027339A1
WO2019027339A1 PCT/RU2017/000566 RU2017000566W WO2019027339A1 WO 2019027339 A1 WO2019027339 A1 WO 2019027339A1 RU 2017000566 W RU2017000566 W RU 2017000566W WO 2019027339 A1 WO2019027339 A1 WO 2019027339A1
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WO
WIPO (PCT)
Prior art keywords
oscillating circuit
liquid medium
circuit
electromagnetic field
electromagnet
Prior art date
Application number
PCT/RU2017/000566
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English (en)
Russian (ru)
Inventor
Василий Радионович РАССОМАГИН
Дмитрий Владимирович КУЛИЖНИКОВ
Алексей Петрович КУЗЬМИН
Original Assignee
Василий Радионович РАССОМАГИН
Дмитрий Владимирович КУЛИЖНИКОВ
Алексей Петрович КУЗЬМИН
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Василий Радионович РАССОМАГИН, Дмитрий Владимирович КУЛИЖНИКОВ, Алексей Петрович КУЗЬМИН filed Critical Василий Радионович РАССОМАГИН
Priority to PCT/RU2017/000566 priority Critical patent/WO2019027339A1/fr
Publication of WO2019027339A1 publication Critical patent/WO2019027339A1/fr

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/56—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using electric or magnetic effects

Definitions

  • the invention relates to the field of measurement technology and can be used to measure the flow of polar liquid media (for example, water, ethyl alcohol) or low-polar (low-polar) liquid media (for example, oil products (gasoline, diesel fuel, kerosene) containing polar molecules in the form of additives ).
  • polar liquid media for example, water, ethyl alcohol
  • low-polar liquid media for example, oil products (gasoline, diesel fuel, kerosene) containing polar molecules in the form of additives ).
  • a well-known liquid and gas flow meter (see description for AS. USSR N ° 1296845 A1, IPC G 01 F 1/56) is an analogue of the proposed device for measuring the flow rate of a liquid medium.
  • the liquid and gas flow meter comprises a housing with a channel made of a non-magnetic material, for example, fiberglass.
  • An elastic plate made of a ferromagnetic material is mounted on the inner wall of the channel of the housing; its free end is provided with a permanent magnet.
  • An electromagnet is installed on the body in the form of a pipeline section so that the elastic plate is in its magnetic field.
  • the electromagnet coil is powered by a controlled sawtooth generator through a switching unit.
  • the generator control circuit includes a power supply connected via a magnetically controlled contact to the trigger input.
  • the magnetically controlled contact is mounted on the body of the flow meter in such a way that the axis passing through its contacts is parallel to the axis of the body. Magnetically controlled contact is protected from the action of the field of an electromagnet screen.
  • the permanent magnet is located on the plate parallel to the axis of the magnetically controlled contact, and its north pole is directed toward the channel entrance.
  • the trigger input through a magnetic contact is connected to the power supply. Trigger serves to form a rectangular voltage pulse and eliminate unnecessary operation of the control circuit when the element contacts “bounce”.
  • the trigger output is connected to the input of the differentiating circuit, which shortens the trigger pulse.
  • the output of the differentiating circuit is connected to the input of the standby multivibrator, which serves to generate a normalized in amplitude and pulse duration necessary for the stable control of the switching unit and the generator of the sawtooth voltage.
  • the waiting multivibrator is also connected to a frequency meter.
  • the generator In the initial state, when the flow is absent, the generator produces a saw-tooth voltage that feeds the electromagnet coil.
  • the current in the coil increases to a maximum value, and then abruptly changes to zero.
  • Such a change in current is necessary so that the plate with a permanent magnet smoothly deviates from its original position to the zone of operation of the element and returns to its original position under the action of its own elastic forces when the current in the coil changes to zero.
  • a plate with a permanent magnet moves towards the element, while the permanent magnet moves progressively perpendicular to the axis of the element and intersects only a single zone of the closed state of the contacts of the element.
  • the trigger input which forms a square pulse. Since the standby multivibrator is not disconnected from the trigger circuit during operation, in order to weaken the trigger circuit effect on its operation, the trigger pulses are shortened by the differentiating circuit. Further pulse arrives at the waiting multivibrator connected to a frequency meter. The waiting multivibrator produces a rectangular pulse, the duration of which is sufficient for the plate to return to its original state. The impulse developed by the waiting multivibrator is fed simultaneously to the input of the sawtooth generator, frequency meter and switching unit.
  • the switching unit opens for a time equal to the pulse duration, as a result of which the circuit of the electromagnet coil opens.
  • the plate with a permanent magnet attached to it under the action of elastic forces returns to its original state.
  • the impulse acts on the generator in such a way that the next increase in voltage at the generator output occurs after a time equal to the duration of the impulse of the waiting multivibrator.
  • a plate with a permanent magnet In the presence of a flow of liquid or gas, a plate with a permanent magnet, due to an increase in the resistance of the moving medium, reaches a maximum deviation over a longer period of time.
  • the element is triggered at a later time compared to the original, since the frequency of the triggering of the magnetically controlled contact and, accordingly, the repetition frequency of rectangular pulses produced by the trigger change. This changes the frequency of the pulses of the waiting multivibrator, which controls the operation of the switching unit and the generator.
  • the oscillation frequency of the output voltage of the generator varies and leads to a corresponding change in the frequency of the voltage in the coil.
  • the oscillation frequency of the plate changes.
  • the oscillation frequency of the plate with a magnet changes.
  • the changed signal enters the generator control circuit and is displayed by a frequency flow meter.
  • flow measurement occurs by changing the oscillation frequency of an elastic plate with a magnet, which is displayed by a frequency flow meter.
  • An elastic plate with a magnet is installed in the flow part of the pipeline of a liquid and gas flow meter, which reduces manufacturability and measurement accuracy.
  • the closest analogue - the prototype of the proposed device for measuring the flow of a liquid medium is a method of measuring the flow of a liquid medium and a device for its implementation (see the description of the patent for the invention of the Russian Federation N ° 2574321 C2, IOC G 01 F 1/56).
  • a device for measuring the flow of a liquid medium contains a liquid medium placed inside a pipeline made of a dielectric material, a permanent magnet, an oscillating circuit and a measuring circuit.
  • a liquid medium can be a dielectric liquid medium, for example, gasoline, diesel fuel, kerosene, or a slightly conducting (or weakly conducting) liquid medium, for example, tap water.
  • the oscillatory circuit contains an inductance coil of the oscillating circuit and a capacitor of the oscillating circuit, and the liquid medium is placed in the pipeline between the pole tips of the permanent magnet, and between the first and second plates of the oscillating circuit capacitor.
  • the first and second capacitor plates of the oscillating circuit are located on the outer surface of the pipeline.
  • the first and second capacitor plates of the oscillating circuit can be placed on the inner surface of the pipeline.
  • the first output of the inductance of the oscillating circuit is connected to the first plate of the capacitor of the oscillating circuit, and the second output of the inductance coil of the oscillating circuit is connected to the second plate of the capacitor of the oscillating circuit.
  • the measuring circuit contains a coil inductance for pumping energy into an oscillating circuit, an inductance coil for reading the frequency of resonant oscillations of an oscillating circuit, an OR element, a transistor, a comparator, a resistor, and a computing device.
  • the second input of the OR element is the input of the start of continuous undamped resonant oscillations of the electromagnetic field of the oscillating circuit.
  • the output of the OR element is connected to the base of the transistor, the emitter of which is connected to the output “Common” of the power supply.
  • the first and second terminals of the inductance of the pumping energy into the oscillating circuit are connected respectively to the collector of the transistor and the first terminal of the resistor, the second terminal of which is connected to the positive terminal of the power source of the measuring circuit.
  • the first and second terminals of the coil inductance of reading the frequency of the resonant oscillations of the oscillating circuit are connected respectively to the output of the “Common” power supply and the direct input of the comparator, to the inverse input of which serves the reference voltage.
  • the output of the comparator is connected to the first input of the OR element and the computing device.
  • the inductor for pumping energy into the oscillating circuit and the inductor reading the frequency of the resonant oscillations of the oscillating circuit is performed by winding an insulated wire over the inductance coil of the oscillating circuit.
  • Device for measuring the flow of a liquid medium works as follows.
  • a single positive pulse is supplied to the second input of the OR element from the parallel channel of the measuring circuit. From the output of the element OR, a positive pulse arrives at the base of the transistor and opens it.
  • EMF electromotive forces of induction in the inductance coil of the oscillating circuit and excite resonant oscillations of the electromagnetic field in the oscillatory circuit.
  • the frequency of the resonant oscillations of the electromagnetic field of the oscillating circuit is removed from the inductor reading the frequency of the resonant oscillations of the oscillating circuit and is fed to the input of the comparator. From the output of the comparator, positive rectangular signals enter the computing device of the measuring circuit and the first input of the OR element.
  • the oscillatory circuit which contains the inductance coil of the oscillating circuit and the capacitor of the oscillating circuit, excite resonant oscillations of the electromagnetic field.
  • the electric field strength vector of the oscillator circuit capacitor is directed from the first to the second capacitor plate of the oscillating circuit (from top to bottom).
  • the vector of the electric field strength of the capacitor of the oscillating circuit is directed from the second to the first face of the capacitor of the oscillating circuit.
  • the electric field of an oscillating circuit capacitor (external electric field) in a liquid medium, the dielectric constant of a liquid medium, and the duration of the first and second half periods of the resonant oscillation period of the electromagnetic field of the oscillating circuit, and the flow rate of the liquid medium change measured by changing the duration of the first or second half periods of the period of resonant oscillations of the electromagnetic field of the oscillating circuit.
  • the direction of the Lorentz force is opposite to the direction of the electric field strength vector of the oscillating circuit capacitor.
  • the polarization of a liquid medium can occur due to the polarization of molecules, positively charged ions and negatively charged ions.
  • the resulting (total) electric field of the bound charges of liquid molecules, positively charged ions and negatively charged ions is opposite to the direction of the electric field intensity vector of the oscillator circuit capacitor in the liquid medium.
  • the electric field of the capacitor of the oscillating circuit decreases in a liquid medium, an increase in the dielectric constant of the liquid medium and the duration of the second half period of the period of resonant oscillations of the electromagnetic field of the oscillatory circuit.
  • the duration of the first and second half periods of the period of resonant oscillations of the electromagnetic field of the oscillating circuit will differ from each other.
  • the magnetic induction of the permanent magnet in the liquid medium changes, which reduces the measurement accuracy.
  • the task of the invention is to develop a device for measuring the flow of a liquid medium, which has a higher sensitivity and measurement accuracy.
  • the problem is solved using the signs specified in the independent claim of the invention, in common with the device prototype, such as a device for measuring the flow of a liquid medium containing a liquid medium placed in a pipeline of dielectric material, a magnet, an oscillatory circuit containing an inductance oscillator circuit and the capacitor of the oscillating circuit, and the liquid medium is placed in the pipeline between the poles of the magnet and the plates of the capacitor of the oscillating circuit, and distinctive creatures nnyh features such as the liquid medium housed in th W
  • the winding of the electromagnet and the capacitor plates of the oscillating circuit are located (mounted) coaxially.
  • the dielectric constant of one part of the liquid medium increases (the projection of the Lorentz force vector of the electromagnet to the direction of the electric field strength vector of the oscillating circuit capacitor (the tangential component of the Lorentz force vector of the electromagnet) is positive) and the dielectric the permeability of another part of the liquid medium decreases (the projection of the Lorentz force vector electromagnet ita the direction of the electric field vector oscillating circuit capacitor (tangential component of the Lorentz force vector electromagnet) is negative).
  • the duration of the first half period is almost equal to the duration of the second half period of the period of damped resonant oscillations of the electromagnetic field of the oscillatory circuit.
  • the flow rate of the liquid medium is measured by changing the frequency of the damped resonant oscillations of the electromagnetic field of the oscillatory kennel, which increases the measurement accuracy.
  • the normal component of the Lorentz force vector of an electromagnet is much larger than the tangential component of the Lorentz force vector. electromagnet relative to the direction of the vector of the electric field strength of the oscillator circuit capacitor at each point of the liquid medium, which increases the sensitivity and accuracy of measurements.
  • FIG. 1 Block diagram of a device for measuring the flow of a liquid medium.
  • FIG. 2. View A in FIG. one.
  • a device for measuring the flow rate of a liquid medium contains a liquid medium placed in a pipeline of a dielectric (preferably ceramic) material, an electromagnet, an oscillating circuit containing an inductance coil 1 of the oscillating circuit and a capacitor of the oscillating circuit, and measuring circuit 4 (see Fig. 1 , 2).
  • the liquid medium is placed in the pipeline between the poles of the electromagnet and the plates of the capacitor 2 of the oscillating circuit. While the winding of the electromagnet 3 and the capacitor plates 2 of the oscillating circuit are aligned.
  • the winding of the electromagnet 3 consists of two inductors in series.
  • the plates of the capacitor 2 of the oscillating circuit are made in the form of two metal discs.
  • the winding of the electromagnet 3 and the capacitor plates 2 of the oscillating circuit are made in the form of two separate structural elements that are installed on the pipeline with glue (see Fig. 1).
  • the function of a liquid medium can be performed by polar liquid media (for example, water, ethyl alcohol) or low-polar (low-polar) liquid media (for example, oil products (gasoline, diesel fuel, kerosene) containing polar molecules in the form of additives).
  • the first and second terminals of the inductance 1 of the oscillating circuit are connected to the plates of the capacitor 2 of the oscillating circuit.
  • Inductance coil 1 of the oscillating circuit without a magnetic core consists of single-layer and multilayer inductors, which are connected in series. As a consequence, the inductance coil 1 of the oscillating circuit has a minimum own capacitance, which increases the sensitivity and accuracy of measurements.
  • Measuring circuit 4 contains an inductance coil 5 of pumping energy into an oscillating circuit, an inductor 6 reading the frequency of resonant oscillations of an oscillating circuit, element I 7, transistor 8, measuring amplifier 9, analog-to-digital converter 10, comparator 1 1, resistor 12 and computing device (not shown).
  • the first input element 13 and 7 is the start input of the continuous and damped resonant oscillations of the electromagnetic field of the oscillating circuit.
  • the output of the element And 7 is connected to the base of the transistor 8, the emitter of which is connected to the output "Common" power.
  • the first and second terminals of the inductance 5 of the energy pumping into the oscillating circuit are connected respectively to the second terminal of the resistor 12 and the collector of the transistor 8.
  • the first terminal of the resistor 12 is connected to the positive terminal 14 of the power supply of the measuring circuit 4.
  • the first and second terminals of the inductor 6 readout the frequency of the resonant oscillations of the oscillating circuit is connected to the measuring amplifier 9, the output of which is connected to the analog-digital converter 10 and the comparator 1 1.
  • the output of the analog-digital converter 10 is connected to the computing device.
  • the output of the comparator 1 1 connect with the second input element And 7 and the computing device.
  • Analog-to-digital Converter 10 is designed to measure the amplitude of the damped resonant oscillations of the electromagnetic field of the oscillating circuit (approximately) and sustained resonant oscillations of the electromagnetic field of the oscillating circuit.
  • the dielectric constant of a liquid medium does not depend on the amplitude of the damped (or undamped) resonant oscillations of the electromagnetic field of the oscillating circuit.
  • the amplitude of the damped resonant oscillations of the electromagnetic field of the oscillating circuit has a minimum value.
  • the magnetic induction (magnetic field) of the electromagnet in a liquid medium, which is necessary for the operation of the proposed flow meter.
  • the overall dimensions and power consumption of the winding of the electromagnet are reduced, which improves the manufacturability, speed (the number of measurements of the flow rate of a liquid medium per unit time) and reduces the power consumption of the flow meter.
  • the undamped resonant oscillations of the electromagnetic field of the oscillating circuit are intended for pumping energy into the oscillating circuit (increasing the amplitude of the undamped resonant oscillations of the electromagnetic field of the oscillating circuit).
  • Device for measuring the flow of a liquid medium works as follows. Inside the pipeline of dielectric material is placed a liquid medium.
  • an electromotive force is induced - electromotive forces of induction in the inductor 1 of the oscillatory circuit and excite in the oscillatory circuit undamped resonant oscillations of the electromagnetic field.
  • the frequency of sustained resonant oscillations of the electromagnetic field of the oscillating circuit is removed from the inductor 6 reading the frequency of the resonant oscillations of the oscillating circuit and fed to the input of the measuring amplifier 9. From the output of the measuring amplifier 9, the signal enters the analog-to-digital converter 10 and the comparator 1 1. From the output of the analog-digital Converter 10 digital signal enters the computing device. From the output of the comparator 1 1 positive signals of a rectangular shape arrive at the second input of the element I 7 and into the computing device.
  • the energy is pumped into the oscillating circuit (under the action of an induced emf, currents are induced according to the direction of the currents in the oscillating circuit).
  • the amplitudes of the currents of undamped resonant oscillations of the electromagnetic field of the oscillating circuit are increased, and the frequency of the undamped resonant oscillations of the electromagnetic field of the oscillating circuit is determined.
  • the oscillatory circuit which contains the inductance coil 1 of the oscillating circuit and the capacitor of the oscillating circuit, excite continuous resonant oscillations of the electromagnetic field.
  • the Lorentz force of an electromagnet turns the polar molecule so that its dipole moment is established in the direction of the Lorentz force of the electromagnet. At the same time, the dipole moment of polar molecules practically does not change (rigid dipole).
  • the dielectric constant of the liquid medium decreases, and the frequency of damped resonant oscillations of the electromagnetic field of the oscillatory circuit increases.
  • the flow rate of the liquid medium is measured by changing the following expressions:
  • the proposed device for measuring the flow of a liquid medium will find wide application in devices of measuring equipment, and other special cases of automation of measuring the flow of a liquid medium will be obvious to specialists.

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Volume Flow (AREA)

Abstract

Un dispositif pour mesurer le débit d'un milieu liquide comprend un milieu liquide se trouvant dans une tuyauterie en matériau diélectrique, un électroaimant, un circuit résonnant qui comprend une bobine d'inductance et un condensateur de circuit résonnant, et le milieu liquide est disposé dans la tuyauterie entre les pôles d'électroaimant et des armatures de condensateur du circuit résonnant. L'enroulement de l'électroaimant et les armatures du condensateur du circuit résonnant sont disposés coaxialement. Le e résultat technique consiste en une augmentation de la sensibilité et de la précision de mesures.
PCT/RU2017/000566 2017-08-03 2017-08-03 Dispositif pour mesurer le débit d'un milieu liquide WO2019027339A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/RU2017/000566 WO2019027339A1 (fr) 2017-08-03 2017-08-03 Dispositif pour mesurer le débit d'un milieu liquide

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/RU2017/000566 WO2019027339A1 (fr) 2017-08-03 2017-08-03 Dispositif pour mesurer le débit d'un milieu liquide

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WO2019027339A1 true WO2019027339A1 (fr) 2019-02-07

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0294924A1 (fr) * 1987-04-13 1988-12-14 Aichi Tokei Denki Co., Ltd. Procédé et dispositif pour compenser la tension continue perturbatrice dans un débitmètre électro-magnétique
US20060096389A1 (en) * 2003-02-10 2006-05-11 Gambro Lundia Ab Flow sensor and method for measuring a flow rate component of a fluid containing electrically charged elements
RU2495382C2 (ru) * 2011-10-07 2013-10-10 Общество с ограниченной ответственностью "Рубин" Способ измерения расхода жидкой или газообразной измеряемой среды
RU2561251C2 (ru) * 2013-09-17 2015-08-27 Общество с ограниченной ответственностью "Рубин" Способ измерения расхода жидкой среды и устройство для его осуществления
RU2574321C2 (ru) * 2013-10-08 2016-02-10 Василий Радионович Рассомагин Способ измерения расхода жидкой среды и устройство для его осуществления
RU2584343C2 (ru) * 2014-08-14 2016-05-20 Акционерное общество "Арзамасский приборостроительный завод имени П.И. Пландина" (АО "АПЗ") Способ измерения расхода электропроводных жидкостей

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0294924A1 (fr) * 1987-04-13 1988-12-14 Aichi Tokei Denki Co., Ltd. Procédé et dispositif pour compenser la tension continue perturbatrice dans un débitmètre électro-magnétique
US20060096389A1 (en) * 2003-02-10 2006-05-11 Gambro Lundia Ab Flow sensor and method for measuring a flow rate component of a fluid containing electrically charged elements
RU2495382C2 (ru) * 2011-10-07 2013-10-10 Общество с ограниченной ответственностью "Рубин" Способ измерения расхода жидкой или газообразной измеряемой среды
RU2561251C2 (ru) * 2013-09-17 2015-08-27 Общество с ограниченной ответственностью "Рубин" Способ измерения расхода жидкой среды и устройство для его осуществления
RU2574321C2 (ru) * 2013-10-08 2016-02-10 Василий Радионович Рассомагин Способ измерения расхода жидкой среды и устройство для его осуществления
RU2584343C2 (ru) * 2014-08-14 2016-05-20 Акционерное общество "Арзамасский приборостроительный завод имени П.И. Пландина" (АО "АПЗ") Способ измерения расхода электропроводных жидкостей

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