SU909601A1

SU909601A1 - Pressure meter

Info

Publication number: SU909601A1
Application number: SU802957861A
Authority: SU
Inventors: Роман Владимирович Доценко; Ярослав Николаевич Николайчук
Original assignee: Ивано-Франковский Институт Нефти И Газа
Priority date: 1980-07-15
Filing date: 1980-07-15
Publication date: 1982-02-28

Description

(54) ИЗМЕРИТЕЛЬ ДАВЛЕНИЯ(54) PRESSURE METER

Изобретение относитс к приборостроению и может найти применение при измерении медленно измен ющихс давлений.The invention relates to instrumentation and can be used in the measurement of slowly varying pressures.

Известны дифференциальные жидкостные маномет1мд,у которых на поверхности жидкости плавает ферромагнитный поплавок, вл ющийс сердечником соленоида, охватывающего трубку 12.Differential liquid manometre1md are known, in which a ferromagnetic float is floating on the surface of the liquid, which is the core of the solenoid surrounding the tube 12.

Перемещение уровн жидкости вызывает изменение индуктивности соленоида , что регистрируетс вторичным прибором.Moving the liquid level causes a change in the inductance of the solenoid, which is recorded by the secondary device.

Наиболее близким к предлагаемому устройству вл етс уровнемер, содержащий источник питани , измериттеЛьный прибор и электроды, выполненные в виде двойной цилиндрической спирали с равнс 1ерным шагом и противоположным направлением витков С2 .Closest to the proposed device is a level gauge containing a power source, a measuring instrument and electrodes made in the form of a double cylindrical helix with an equal pitch and the opposite direction of the coils C2.

Недостатком известного устройства вл етс низка точность измерени давлени .A disadvantage of the known device is the low accuracy of the pressure measurement.

Цель изобретени - повыввение точности измерени давлени .The purpose of the invention is to increase the accuracy of pressure measurement.

Указанна цель достигаетс тем, что устройство, содержащее измерительную трубку, частично заполненную жидкостью, в виде двойной цилиндрической спирали с равномерным шагом и противоположным направлением витков , с вертикальной рабочей осью и индикатор, снабжено магнитопроводом , соленоидом, бесконтактным сельсином , синтезатором трехфазного пр моугольного напр жени , генератором, This goal is achieved by the fact that the device containing a measuring tube, partially filled with liquid, in the form of a double cylindrical spiral with a uniform pitch and opposite direction of the coils, with a vertical working axis and an indicator, is equipped with a magnetic core, solenoid, contactless selsyn synthesizer of three-phase rectangular voltage by generator

10 усилителем и преобразователем фаза код , а в каждом колене измерительной трубки на поверхности жидкости расположены поплавки из магнитом гкого материгша, причем магнитопровод ус15 тановлен вдоль вертикальной оси внутри спирали, образованной трубками, и выполнен в виде пр моугольной рамки , магнитопровод через сердечник соединен с осью ротора бесконтатно20 го сельсина, трехфазна обмотка которого подключена к синтезатору трехфазного пр моугольного напр жени , вход синтезатора подключенк выходу генератора импульсов, а выход нуле25 зой фазы соединен со входом усилите1Я и первым входом преобразовател фаза - код, второй вход которого подключен к выходу однофазной обмотки сельсина, выход преобразовател 10, an amplifier and a phase converter code, and in each knee of the measuring tube on the surface of the liquid are floats of magnet material, the magnetic circuit is installed along the vertical axis inside the spiral formed by the tubes and made in the form of a rectangular frame, the magnetic circuit is connected to the axis through the core a rotor of an unrestricted selsyn, the three-phase winding of which is connected to a three-phase rectangular voltage synthesizer, the input of the synthesizer is connected to the output of the pulse generator, and the output is zero 25 This phase is connected to the input of amplifier 1I and the first input of the converter; phase is the code, the second input of which is connected to the output of the single-phase winding of the selsyn; the output of the converter

Claims

Phase 30 - code - to the indicator, which is digital, to the output of the amplifier - to the solenoid winding. The Hci drawing shows a pressure gauge. The device contains a hydraulic multiplier 1, a measuring tube 2 in which floats 3 float, an interaction with the magnetic core 4, a solenoid 5, the core 6 of which is rigidly connected to the axis of the rotor of the noncontact selsyn 7 fed by the synthesizer 8 three-phase rectangular voltage, controlled by the generator 9, the amplifier 10 for supplying the solenoid winding, the converter 11, the phase is the code whose output is connected to the digital indicator 12-. The device works as follows. The measured pressure is supplied through the multiplier 1 to the measuring tube 2. The floats 3, which are pressed on the surface of the liquid, rotate the magnetic circuit 4, the magnetic flux in which is created by the salt-like fluid 5. The rotation of the magnetic conductor; 5 (D 4 is transferred to the rotor contactless selsyn 7, by means of which it forms a signal whose phase is suitable for pressure. To prevent sticking and friction of floats 3 against the walls of tube 2, the floats are made of a soft material magnet, and power is supplied to solenoid 5 in the form of an electronic key, the control input of which is connected to one of the outputs of the cm-tester 8. The measured phase difference is fed to the converter 11 - the code from the output of which it goes to the digital indicator 12. The proposed pressure meter improves the accuracy of the pressure measurement and in automated control systems by obtaining a pressure signal in digital form. Formula of the invention A pressure meter containing a measuring tube, partially filled with liquid, in the form of a double cylindrical spirals with a uniform tag and opposite direction of turns, with a vertical working axis and an indicator, characterized in that, in order to increase the accuracy of pressure measurement, it is equipped with a magnetic circuit, solenoid, contactless selsyn, three-phase rectangular voltage synthesizer, phase generator - code, and in each knee of the measuring tube on the surface of the liquid are floats of magnet of a soft material, and the magnetic pipe is installed along the vertical axis of the inside of the spiral, The tube is connected to the axis of the rotor of the contactless selsyn, the three-phase winding of which is connected to the three-phase rectangular voltage synthesizer, the input of the synthesizer is connected to the output of the pulse generator, and the zero-phase output is connected to the input of the generator the amplifier and the first input of the phase converter - the code, the second input of the phase converter - the code is connected to the output of the single-phase winding of the selsyn, the output of the phase converter - the code to the indicator, which th digitally, and the output of the amplifier - for solenoid coils. Sources of information taken into account in the examination 1. Japanese Patent No. 49-9800, cl. 112 H 02, 1974.

2. Authors certificate of the USSR 535462, cl. G 0.1 F 23/24, 1974 (prototype).