【作者】 张照云； 高杨； 赵兴海； 赵翔；

【Author】 ZHANG Zhao-yun1,2,GAO Yang1,3,ZHAO Xing-hai1,ZHAO Xiang1, 2 (1.Institute of Electronic Engineering, China Academy of Engineering Physics, Mianyang 621900, China; 2.Department of Graduate Student, China Academy of Engineering Physics, Beijing 100088, China; 3.Key Laboratory of Optoelectronic Technology and System, Chongqqing University,Chongqing 400044, China)

【机构】 中国工程物理研究院电子工程研究所； 中国工程物理研究院北京研究生部； 重庆大学光电技术及系统教育部重点实验室；

【摘要】 讨论了激光自混合测速的原理、发展现状及关键技术。基于三镜腔模型,详细讨论了激光自混合测速的原理。反馈光与激光器腔内光混合,调制激光器的输出功率和频率,通过信号处理得到频移量,从而计算出物体的运动速度。当前,激光自混合测速技术尚处于发展阶段。主要针对低速、匀速的运动物体,速度测量范围为几mm/s至几十m/s,测量精度为1%;尚未建立普遍适用的测速模型,对影响自混合测速精度的因素研究还不成熟;信号处理和硬件实现的报道较少。激光自混合测速还有许多关键技术有待解决:高速、变速运动对象测速未见报道;高精度、大动态范围的信号处理技术有待发展;需要研究普遍适用的用于速度方向辨别的方法等。更多还原

【Abstract】 Laser self-mixing velocity measurement’s principle, develop statement and key technologies are summarized. Based on the three-mirror cavity model, principle of the laser self-mixing velocity measurement is discussed. Optical output power and frequency of the laser are modulated when the optical beam is back-scattered into the active cavity of the laser. By signal processing, the shifted frequency can be calculated, and the target’s velocity can be acquired. At present, velocity measurement by the self-mixing effect is still in the state of development. Existed research mainly focus on the target with low and constant velocity, the velocity measurement range is several mm/s to dozens m/s, the measurement precision has been reached 1%. The universal velocity measurement model is not yet build, and measurement precision factors are not very clear. Signal processing and the hardware implementation is less reported. A lot of key technologies are not yet solved in velocity measurement by the self-mixing effect. Velocimeter for high speed or variable speed is not reported. Signal processing method with high-precision, large dynamic range is also need to be developed. How to identify the direction of speed is also a challenge.更多还原