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为了获取爆破过程中爆炸容器变形参数来分析爆破强度,设计了激光多普勒效应外差纵向测量系统,利用高斯光束理论和束腰特性优化了光路结构．根据爆破过程多普勒信号的特点,研究了相应的数字滤波和频谱分析方法,实现了爆破容器高速形变过程的动态测量．系统的测量形变量程为±30mm,测量形变速度的量程为-10m/s～+20m//s,遥测距离为4．5m．与标准振动台的试验对比,位移测量相对误差小于1%．最后,还给出了圆柱形钢制罐体在20 g TNT当量炸药爆破过程中变形的测量结果．
In order to analyze the burst strength of explosive container during blasting, a laser Doppler effect heterodyne longitudinal measurement system was designed. The optical path structure was optimized by Gaussian beam theory and beam waist characteristics. According to the characteristics of Doppler signal in blasting process, the corresponding digital filtering and spectrum analysis methods are studied, and the dynamic measurement of high speed deformation of blasting container is realized. The measuring deformation range of the system is ± 30mm, the measuring range of the deformation speed is -10m / s ~ + 20m // s, and the telemetry distance is 4.5m. Compared with the standard shaking table test, the displacement measurement relative error is less than 1%. Finally, the measurement results of the deformation of cylindrical steel tanks during the blasting of 20 g TNT explosives are also given.