Testing device for high-temperature pressure sensor

Abstract

The invention discloses a testing device for an ultrahigh-temperature pressure sensor. The testing device for the high-temperature pressure sensor comprises a sealed testing part, a heating part, an air pressure control part and an electric signal measurement control part, wherein the sealed testing part is composed of a stainless steel tube 1, a thermal resistor 2, a tee fitting 5 and an aviation plug 6, one end of the stainless steel tube 1 is sealed while the other end of the stainless steel tube 1 is open, the sealed testing part is used for providing a needed sealed environment for the high-temperature pressure sensor, the heating part is composed of an electric furnace 7 and is used for providing a needed high-temperature environment for the high-temperature pressure sensor, the air pressure control part is composed of a vacuum pump 9, a nitrogen cylinder 10 and an air pressure controller 11 and is used for providing needed different and stable air pressures in the testing process of the pressure sensor, and the electric signal measurement control part is composed of a constant voltage / current source 12, a multimeter 13, a multimeter 14 and a computer 15 and is used for collecting testing data and achieving signal control. The testing device for the high-temperature pressure sensor can provide the sealed and reliable high-temperature testing environment with the high temperature not smaller than 600 DEG C for the high-temperature pressure sensor.

Description

technical field [0001] The invention relates to the testing field of pressure sensors, in particular to a testing device for pressure sensors at ultra-high temperatures. Background technique [0002] High-temperature pressure sensors are widely used in high-temperature extreme environments such as aerospace and industrial production. Traditional pressure sensor testing devices are difficult to be directly applied to test high-temperature pressure sensors. At present, the traditional pressure sensor testing method is generally to place the sensor under test in a sealed tank first, then use a thermostat to raise and lower the temperature of the sample in the sealed tank, change the air pressure of the sealed tank, and measure the pressure of the sensor at different pressures and temperatures. Output voltage to obtain static parameters such as sensitivity, nonlinearity, hysteresis, and repeatability of the sensor. The tank body and the tank cover of the sealed tank are usuall...

AI Technical Summary

Problems solved by technology

When testing the static characteristics of high-temperature pressure sensors in an environment above 300°C, if the sealed tank is placed in an incubator according to the general method, the sealant, rubber ring, screw structure, insulating glass, etc. will lose their seal due to high temperature , causing the test to fail

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