爆轰物理、冲击波物理、强激光等众多领域均提出了对多个目标同时进行测速的要求, 从而急需研制多点测速系统。论述了光子多普勒测速的工作原理和光路结构, 计算了整个光纤链路上的功率变化, 分析了多点光子多普勒测速系统最大通道数量的各个影响因素及影响程度。根据分析结果, 研制了一套八通道光子多普勒测速样机, 可对8个测点进行同步测速, 并进行了爆轰加载金属飞片和粒子的验证实验。实验结果表明, 在测试条件逐渐恶化, 探头接收效率逐渐降低的情况下, 样机对单个或多个运动目标均达到了较好的速度测量结果, 获得了信噪比较高的待测目标速度曲线。研究结果对于深入探索多点激光测速技术及其应用极具参考意义。

As the investigation deepened, it is necessary to measure the velocity of the object in an array with large quantities of points or in a covered area, in the field of explosion and shock waves physics, intense laser, et al. The operational principle and topology of photonic Doppler velocimetry were introduced, the transformation of power in optical fiber link was computed in detail, and the maximum number of channel was analyzed for multi-channel photonic Doppler velocimetry. According to the analysis, a 8-channel photonic Doppler velocimetry which can measuring 8 targets′velocity simultaneously, is assembled on the basis of the optical Doppler effects, and the velocity of the explosively driven metal plate was tested by the proposed velocimetry. The experimental results show that the velocities of the steel flyer plates and the lead granules are measured well, with the poor receiving efficiency. The research results will provide a valuable reference for the practical application of the velocimetry to measure a large number of targets′velocity simultaneously.