SU1569612A1

SU1569612A1 - Pressure transducer

Info

Publication number: SU1569612A1
Application number: SU884362949A
Authority: SU
Inventors: Валерий Давыдович Карминский; Виктор Васильевич Черников; Андрей Михайлович Елманов; Николай Николаевич Чешков
Original assignee: Ростовский институт инженеров железнодорожного транспорта
Priority date: 1988-01-15
Filing date: 1988-01-15
Publication date: 1990-06-07

Abstract

Датчик давлени предназначен дл измерени давлени в цилиндре действующих машин. Может найти применение дл контрол работы, наладки и диагностики работы ДВС и поршневых компрессоров. Датчик включает корпус 1, упругий элемент в виде мембраны 2, прижатый к седлу в корпусе с помощью чашки 3, нажимной элемент 4, воздействующий на проставку через шарики 5, рабочий тензорезистор, укрепленный на мембране, и компенсирующий тензорезистор, укрепленный на внутренней поверхности проставки. Вследствие того, что площадь теплообмена между гор чими газами и мембраной минимальна, погрешность измерени , вносима температурой, уменьшаетс . Так как компенсирующий тензорезистор закреплен на недеформируемой от давлени газов поверхности чашки, то сигнал от него зависит только от температуры. 2 з.п. ф-лы, 2 ил.The pressure sensor is designed to measure the pressure in the cylinder of existing machines. It can be used to control the operation, adjustment and diagnostics of the internal combustion engine and reciprocating compressors. The sensor includes a housing 1, an elastic element in the form of a membrane 2, pressed against the seat in the housing with a cup 3, a pressure element 4 acting on the spacer through the balls 5, a working strain gauge mounted on the membrane, and a compensating strain gauge mounted on the inner surface of the spacer. Due to the fact that the heat exchange area between the hot gases and the membrane is minimal, the measurement error introduced by the temperature is reduced. Since the compensating strain gauge is fixed on the surface of the cup that is not deformable from the gas pressure, the signal depends on it only on temperature. 2 hp f-ly, 2 ill.

Description

Фиг. 2FIG. 2

1212

Claims

1, A pressure sensor comprising a housing with a cavity in communication with the medium to be measured, a membrane that is mounted peripherally on the landing plane of the housing and pressed against it by a transition element, while a strain gage is fixed on the central part of the membrane, and a compensation strain gage, and the resistors are included in measuring bridge, w and th with the fact that, in order to increase accuracy under conditions of cyclically changing pressures and high temperatures, an elastic heat-transfer element of the gull is introduced, which contacts the body with its base through balls and is additionally connected to the membrane by elastic heat - water, and an annular groove is made in the body under the peripheral part of the membrane, as well as channels connecting the groove to the body cavity in communication with the medium to be measured, while the compensation thermistor is fixed on the inner surface of the cup,