The Research Of The Dynamic Sensitivity Of The Shock Wave Pressure Sensor

Shock wave pressure test play an important role in engineer domain especially the military domain, its pressure character parameter is a primary way in evaluating the might of explosive and weapon. Pressure sensor is a key link in affecting shock wave pressure test, and the dynamic property of pressure sensor is an important parameter in affecting the accuracy of the test.This paper analyzes the demarcating and calibrating way of dynamic property of pressure sensor, especially the technology utilize the shock wave tube as the excitation source, so the thesis did in-depth research direct at the sensitivity of pressure sensor. Utilize shock wave tube as the excitation source to do the sensitivity demarcate of ENDEVCO piezoresistive pressure sensor, analyze the repetitiveness and confidence level and other parameters of piezoresistive pressure sensor, point out the inaccuracy of dynamic sensitivity and static sensitivity, and then analyze its character. In the procedures of demarcating pressure sensor, summary and analyze the mach number control when the shock wave tube is working, compute the speed of shock wave accurately, it has guide significance for spot test.The dynamic property can affect the test system, according which the paper summary some important way to improve the test precision. Including, demarcate and calibrate the dynamic sensitivity of the system, found system dynamic model, and test the pressure and speed on spot at the same time. Point out a way to improve the test precision for shock wave space spot test from the angle of system dynamic property's affect, especially the way of combining the dynamic sensitivity of sensor and system inverse filtering technology.