冲击波超压测试用压力传感器热冲击特性研究

Study on Characteristics of Thermal Shock Response of Shock Wave Pressure Sensor for Testing

针对压力传感器前增加隔热层影响动态特性及给使用方便性带来影响的问题,研究了两种典型压电式冲击波超压传感器对热冲击的抑制能力。根据压电式冲击波超压传感器的结构特点分析了热冲击产生响应机理;根据冲击波超压经验公式对冲击波超压传感器使用热冲击幅值及作用时间进行了仿真计算,并对高阻电荷输出型和ICP型的冲击波超压传感器的热冲击响应输出特性进行了实验研究,分别得出了两种传感器在冲击波测试中的适用范围。

The ability to inhibit thermal shock of two common piezoelectric pressure sensor were researched against the effect of dynamic characteristics and convenient use on the condition of adding insulating layer in the front of pressure sensor. Response mechanism of piezoelectric shock wave pressure sensor producing by thermal shock was analyzed through its structural characteristics. The relationship of dosage,compared distance and the pressure value of sensor,action time,temperature was estimated by the empirical formula of shock wave overpressure. The output characteristics of thermal shock response of high resistance charge output type and ICP type of shock wave pressure sensor were tested and analyzed by experiment. The scope of application of different type sensor in the shock wave test was probed.