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随着相关研究的发展,在冲击波物理、爆轰物理、强激光、兵器等众多领域中,均提出了通过单个探头对小范围内的多个目标,如多个小飞片或粒子群,同时进行高精细度速度测量的要求,为满足该要求,论述了光子多普勒测速的工作原理和光路结构,分析了单探头多目标测速应用时的信号特征和数据处理方法,指出速度分辨率和空间分辨率是决定该性能的关键因素。根据理论分析结果,采用光通信行业中的常规器件,搭建了一台光子多普勒测速仪,并设计了爆轰实验装置,同时利用该装置进行了爆轰加载金属飞片的验证实验。实验结果表明,使用单个光子多普勒测速探头,对单个大尺寸铝飞片、多个小尺寸铝飞片、铅靶喷射粒子群等单个或多个运动目标均达到了较好的速度测量结果,获得了各目标的速度曲线以及多条速度曲线构成的速度带,测量最高速度达到2.5km/s,工作距离达到20mm。研究结果对于深入探索光子多普勒测速技术在单探头多目标测速中的应用有重要的参考意义。
With the development of related researches, many targets in a small area, such as multiple flyers or particle swarms, have been proposed in many fields such as shock wave physics, detonation physics, intense laser, In order to meet the requirement, the working principle and optical path structure of photon Doppler velocimetry are discussed. The signal characteristic and data processing method of single-probe multi-target velocimetry are analyzed. The speed resolution and Spatial resolution is a key factor in determining this performance. According to the results of theoretical analysis, a photon Doppler velocimeter was set up based on the conventional devices in the optical communication industry. A detonation experiment device was designed. At the same time, the device was used to verify the detonation loading of metal flyer. The experimental results show that single photon Doppler velocimetry probe achieves better velocity measurement for single or multiple moving targets such as single large aluminum flyer, multiple small aluminum flyer and lead target jetting particle swarm The velocity curves of each target and the velocity bands of multiple velocity curves were obtained. The maximum velocity of measurement was 2.5km / s and the working distance was 20mm. The research results have important reference significance for further exploring the application of photon Doppler velocimetry in single-probe multi-target velocimetry.