Water shooting pressure measurement sensor

Abstract

The invention discloses a water shooting pressure measurement sensor. The sensor mainly comprises a piezocrystal assembly and an amplifying circuit, wherein the amplifying circuit is arranged in a shell; the piezocrystal assembly is connected with the amplifying circuit through a connecting lead; the amplifying circuit is connected with a signal output cable; the piezocrystal assembly is coated in sound-transparent silicone rubber by an epoxy resin; a graphite layer is coated on the external surface of the sound-transparent silicone rubber; the amplifying circuit is coated by an insulated tape and is packaged in the shell by elastic silicone rubber; one end of the shell is connected with a top cap; the output cable passes through the top cap to be connected with the amplifying circuit; and a screw for fixing the signal output cable is arranged on the shell. The sensor has a simple structure, cannot be easily shot and damaged by explosive products, and can be used for measuring water shooting pressure in a complex environment; and the output cable is reliably connected.

Description

technical field [0001] The invention belongs to the technical field of sensors, and relates to a pressure sensor for measuring explosion shock waves in water, which is mainly used for the measurement of explosion shock waves and bubble energy in complex water environment, and provides test sensors for the research of explosion phenomena in water. Background technique [0002] Explosion test in water has attracted more and more people's attention. To gain insight into the destructive effects of an underwater explosion, the measurement of the shock wave and bubble energy produced by the explosion is key. For sensors used to measure explosion pressure in water, especially piezoelectric pressure sensors with high impedance requirements, the signal is weak. If it is eroded by moisture, the impedance will drop, and the charge will leak quickly and introduce measurement errors. At present, most of the sensors used for underwater explosion pressure measurement use tourmaline crysta...

AI Technical Summary

Problems solved by technology

If the acoustic impedance of the two materials does not match, it will affect the test results of the pressure signal

At the same time, since the output cables of pressure sensors in water are relatively long, the cables will be impacted by their own weight, water or explosion shock waves, so that the roots of the cables with low connection strength are easy to loosen, which affects the reliability of the connection

[0005] 3. The 138A sensor of PCB company is expensive, and the price of each sensor is 43,000 yuan, which increases the test cost

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