摘要
冲击波自由场压力测试是武器弹药爆炸试验中的一种重要测试方法,目前常用的笔式传感器需要对准爆心,而动爆或复杂爆炸中难以实现准确对准,会造成较大的测试误差.针对上述问题,设计了一种用于空气爆炸场测试的球形传感器结构,该设计有效地实现了对多个方向冲击波的测量,克服了传统传感器对爆心位置敏感的缺陷,传感器采用压电陶瓷作为敏感元件,连接传感器端采用一锥形结构,以提升其在复杂爆炸环境中的性能和稳定性.在激波管平台上进行了性能标定,并完成了实际爆炸验证试验.测试结果表明,传感器上升时间为1.23 ms,灵敏度为100.34 pC/kPa,传感器测试了6个方向的自由场压力,分布偏差在±7.1%以内.
Abstract
The shock wave free field pressure test is an important test method in the explosion test of weapons and ammunition.Currently,the commonly used pen sensor needs to be aligned with the detonation core,but it is difficult to achieve accurate alignment in dynamic explosion or complex explosion,which will cause large test errors.To solve the above problems,a spherical sensor structure for air explosion field testing is designed,The design effectively realizes the measurement of shock wave in multiple directions and overcomes the defect of the traditional sensor which is sensitive to the location of the detonation core.The sensor adopts piezoelectric ceramic as the sensitive element and adopts conical structure at one end of the connected sensor to improve its performance and stability in the complex explosion environment.and its performance is calibrated on the shock tube platform to complete the explosion verification test.The test results show that the sensor's rise time is 1.23 ms,the sensitivity is 100.34 pC/kPa,The sensor tested free field pressures in six directions,and the distribution deviation is within±7.1%.
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