Low temperature drift wall pressure sensor

Abstract

The low temperature drift wall pressure sensor used in the present invention is used as a sensor for measuring wall shock wave pressure or ground surface shock wave pressure. The low temperature drift wall pressure sensor has a wide range, high sensitivity and low temperature drift performance, and it includes a stainless steel shell. Body, polytetrafluoroethylene insulating sleeve, plexiglass positioning sleeve, phosphor bronze core electrode, quartz piezoelectric element, gasket and elastic element, the low-temperature drift wall surface can achieve close connection with low-noise cables, and has good corrosion resistance, Impact-resistant, water-tight and acoustically insulating.

Description

technical field The invention belongs to the technical field of explosion pressure field measurement, in particular to a low-temperature drift wall surface pressure sensor structure. Background technique When measuring the pressure acting on the surface of the component or measuring the pressure acting on the surface of the ground in the air explosion or water explosion pressure field, a wall pressure sensor must be used; when installing this sensor, the surface of the sensitive part of the sensor must be in line with the surface of the measured component Flush, or flush with the surface near the measuring point. In the field explosion test, this kind of wall pressure sensor not only has to withstand the transient explosion and impact, but also has to withstand the changeable field environmental temperature field, and sometimes also has to withstand the effects of rain and moisture. Pressure sensors, some semiconductor sensors, have poor shock and vibration resistance, poor...

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Problems solved by technology

In the field explosion test, this kind of wall pressure sensor not only has to withstand the transient explosion and impact, but also has to withstand the changeable field environmental temperature field, and sometimes also has to withstand the effects of rain and moisture. Pressure sensors, some semiconductor sensors, have poor shock and vibration resistance, poor stability, and poor waterproof and sealing performance in complex and harsh environments. Manganin piezoresistive sensors have better performance, but their sensitivity is too low; The sensor for measuring wall pressure in the explosion pressure field must have the following properties: wide enough range, such as the upper range is 50Mpa, the lower range is 0.5MPa; high enough sensitivity, such as 10pc / Mpa ~ 100MPa; sufficiently low temperature drift , such as 0.01pc / ℃~0.001pc / ℃; it has the performance of water sealing and has strong shock and vibration resistance

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