High temperature pressure sensor test device
A pressure sensor and testing device technology, applied in measuring devices, measuring fluid pressure, instruments, etc., can solve problems such as test failure, insulating glass loses hermeticity, etc., and achieve the effect of enhancing reliability
Active Publication Date: 2017-11-17
PEKING UNIV
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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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[0016] In order to make the above objects, features and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0017] figure 1 It is a structural block diagram of the high-temperature pressure sensor testing device in the present invention, and the structural block diagram reflects the composition and interrelationship of each part in the device. As can be seen from the structural block diagram, the whole device is divided into four parts: 1. The sealing test part provides the sealing environment required for the high-temperature pressure sensor test. The tube body of the test tube is a metal tube with one end closed, and the other end Composed of three-way joints and aviation plugs, the pressure sensor to be tested is placed at the blind end of the test tube, and is inserted into the furnace from the test hole of the electric ...
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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...
Claims
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IPC IPC(8): G01L27/00
Inventor 刘冠东胡杭崔万鹏李哲高成臣郝一龙
Owner PEKING UNIV