SU1597625A1

SU1597625A1 - Apparatus for measuring pressure

Info

Publication number: SU1597625A1
Application number: SU884608880A
Authority: SU
Inventors: Виктор Васильевич Черников; Валерий Давыдович Карминский; Николай Геннадиевич Дичев; Андрей Михайлович Елманов; Станислав Валерьевич Стрельников
Original assignee: Ростовский институт инженеров железнодорожного транспорта
Priority date: 1988-11-24
Filing date: 1988-11-24
Publication date: 1990-10-07

Abstract

Изобретение относитс к измерительной технике и позвол ет повысить точность измерени давлени в цилиндре поршневых машин. Устройство включает корпус 1, прижимной элемент 2, упругий элемент 3, блок 13 питани , регулируемый усилитель 11, регистрирующее устройство 14, рабочий 4 и компенсирующий 5 тензорезисторы, электрически св занные с блоком 13 питани и регулируемым усилителем 11, выход которого св зан с регистрирующим устройством 14, две поверхностные термопары 6, 7, гор чие спаи которых, выполненные из термоэлектродов 8, 9, покрывают незащемленную часть упругого элемента полностью. Гор чий спай одной термопары расположен на одной стороне упругого элемента, а гор чий спай другой - на другой стороне упругого элемента, а каждый термоэлектрод каждой термопары подключен к электронному вычислительному управл ющему блоку 12, выход которого св зан с управл ющим входом усилител 11. Коэффициент усилени усилител 11 измен етс с учетом изменени температуры упругого элемента 3. 1 ил.The invention relates to a measurement technique and makes it possible to increase the accuracy of measuring the pressure in a cylinder of piston machines. The device includes a housing 1, a pressing element 2, an elastic element 3, a power supply unit 13, an adjustable amplifier 11, a recording device 14, a worker 4 and a compensating 5 strain gauges electrically connected to the power supply unit 13 and an adjustable amplifier 11, the output of which is associated with the registering The device 14, two surface thermocouples 6, 7, the hot junctions of which, made of thermoelectrodes 8, 9, cover the non-grounded part of the elastic element completely. The hot junction of one thermocouple is located on one side of the elastic element, and the hot junction of the other is on the other side of the elastic element, and each thermal electrode of each thermocouple is connected to an electronic computational control unit 12, the output of which is connected to the control input of the amplifier 11. Coefficient The gain of the amplifier 11 varies with the change in temperature of the elastic element 3. 1 sludge.

Description

фиг. 2FIG. 2

Claims

Claim

A device for measuring pressure, comprising a pressure sensor with a sensing element in the form of a membrane, a working and compensating strain gages included in the measuring bridge, the output of which is connected to a recorder through an amplifier, and a power supply unit, characterized in that, in order to improve accuracy, it is introduced electronic computing control unit, and the pressure sensor is equipped with two thermocouples in the form of flat round thermoelectrodes, hot junctions of which are located on the surfaces of the membrane on its two sides, while the diameter t thermoelectrodes is equal to the diameter of the working part of the membrane, and on the thermoelectrode _; located on the side of the membrane opposite to the medium being measured, a working strain gauge is fixed through the insulator, while the electronic computing control unit is connected to thermoelectrodes by its inputs, and the output is connected to the control input of the amplifier, which is adjustable.