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针对目前VISAR等测速仪在测量瞬态高速小飞片速度时调试复杂、测试成功率低等问题,基于光子多普勒效应和自混频原理,采用1 550 nm单模激光,成功研制了一套光子多普勒测速系统。使用该系统测量了不同激光能量密度下的复合飞片瞬时速度,结果显示:该系统测试成功率高,响应速度快,获得的速度曲线完整而清晰。与传统的VISAR和F-P干涉测速仪相比,具有操作简单、测试成功率高、便于携带等非常明显的优势。该系统适用于速度在几百米/s~几千米/s的微小飞片或者微区爆轰的速度测量,也可应用于常规爆炸流场的测试。
Aiming at the problems of complex debugging and low test success rate of VISAR and other current velocimeters in the measurement of transient high flying speed, based on photon Doppler effect and self-mixing principle, 1 550 nm single-mode laser was successfully developed Set of photon Doppler velocimetry system. The system was used to measure the instantaneous speed of the composite flyer under different laser energy densities. The results show that the system has high success rate and fast response speed, and the obtained speed curve is complete and clear. Compared with the traditional VISAR and F-P interferometer, it has the obvious advantages of simple operation, high test success rate, easy to carry and so on. The system is suitable for the speed measurement of tiny flying flakes or micro-detonation in the speed of several hundred meters / s ~ several kilometers / s, and can also be applied to the testing of the conventional explosion flow field.