激光与光电子学进展, 2013, 50 (7): 071404, 网络出版: 2013-07-01
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
激光技术 相干光学 相干激光雷达 多普勒测速 三光束 laser technique coherence optics coherent lidar Doppler velocimetry triple-beam
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0.2 m/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。
Abstract
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.
邬战军, 韩凤山, 范哲, 林志立. 基于Janus配置的三光束激光多普勒测速仪[J]. 激光与光电子学进展, 2013, 50(7): 071404. Wu Zhanjun, Han Fengshan, Fan Zhe, Lin Zhili. Triple-Beam Laser Doppler Velocimeter Based on Janus Configuration[J]. Laser & Optoelectronics Progress, 2013, 50(7): 071404.