基于Janus配置的三光束激光多普勒测速仪  

Triple-Beam Laser Doppler Velocimeter Based on Janus Configuration

作　　者：邬战军[1] 韩凤山[1] 范哲[1] 林志立[1] 

机构地区：[1]北京航空航天大学仪器科学与光电工程学院,北京100083

出　　处：《激光与光电子学进展》2013年第7期63-67,共5页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(61101007)

摘　　要：为了可以同时测量车辆的纵向和横向速度,提出了一种基于Janus配置的三光束激光多普勒测速仪(TLDV)。给出了TLDV的测速模型和测速公式,对其测速的相对误差进行了理论分析和数值仿真。结果表明:TLDV对车辆颠簸、摇晃不敏感,测速误差只受上下颠簸角的影响,与左右摇晃角无关;当车辆上下起伏速度一定时,测速误差随着上下颠簸角的增大而增大,当上下起伏速度为0.2m/s,颠簸角为10°时,测速误差小于0.3%。最后,给出了一种TLDV光束方向的最佳配置方案。In order to measure the longitudinal and lateral speeds of a vehicle simultaneously, a triple-beam laser Doppler velocimeter （TLDV） system based on Janus configuration is presented. The model and the expression of speed measurement are given. According to the analysis and simulation, some results can be obtained as follows： firstly, TLDV is less sensitive to bump and shake; secondly, the relative speed measurement error is affected only by the bump angle and has no relationship with the shake angle; thirdly, the relative error is lower than 0.3 % when the bump angle is 10° and the velocity is 0.2 m/s. Last of all, a kind of optimal configuration of TLDV beams is given.

关 键 词：激光技术 相干光学 相干激光雷达 多普勒测速 三光束 

分 类 号：TN958.98[电子电信—信号与信息处理]