自检式冲击波参量检测系统设计  

Design of self-check shock wave parameter measurement system

作　　者：胡杨[1] 张宇红[1] 温上捷[1] 

机构地区：[1]中国工程物理研究院流体物理研究所,四川绵阳621900

出　　处：《传感器与微系统》2013年第11期101-104,共4页Transducer and Microsystem Technologies

基　　金：国家自然科学基金资助项目(10902102)

摘　　要：针对冲击波参量检测与系统可靠性问题,设计了一种带自检功能的冲击波参量检测系统。传感头采用自发光式光纤镀膜探针,光纤探针在冲击高压下发光,并通过高速光电转换与示波器记录冲击响应信号,实现对冲击波参量检测。将激光脉冲耦合入传感光路,通过检测激光脉冲在镀膜光纤探针端面镀膜层的反射脉冲信号实现系统自检。详细介绍了镀膜光纤探针、高速光电转换电路及半导体激光器脉冲驱动源的设计与实现。进行了TNT爆轰驱动条件下冲击波到达时间的测量,实验结果表明:整系统的冲击波响应信号前沿小于5 ns,测量不确定度小于3 ns,为爆轰物理和冲击波物理实验中冲击波参量检测提供了一种可靠有效的测试手段。Aiming at problem of shock wave parameter detection and system reliability, a shock wave parameter detection system with self-check function is designed. Sensing probe uses self-illumination type probe coating optical fiber, the probe radiate light under high pressure and through high-speed photoelectric conversion and oscilloscope to record shock response signal, and realize shock wave parameter measurement. Coupling the laser pulse with the sensing channel, self-check of the whole system is realized by detecting the reflected pulse signal from the top end of metal film of the fiber probe. Design and implementation of film coating optical fiber probe, high speed photoelectric conversion circuit and semiconductor laser pulsed driving source is introduced in detail. The measurement of arrival time of the shock wave under TNT detonation driving is carried out, and experimental result indicates that the frontier of shock wave response signal of system is less than 5 ns and uncertainty of measurement is less than 3 ns, and the system provides a reliable and effective measurement method for shock wave parameter measurement in detonation physics and shock wave physics experiments.

关 键 词：传感器 冲击波 光纤探针 光电转换 激光脉冲 

分 类 号：TP212.1[自动化与计算机技术—检测技术与自动化装置]