提出了一种分析位置敏感探测器(PSD)对激光追踪测量系统性能影响的方法,分析了PSD的测量原理,建立了激光追踪测量系统中的PSD测量模型。利用Matlab/Simulink软件搭建了激光追踪测量系统的仿真模型,仿真分析了PSD的位移电压转换系数对激光追踪测量系统性能的影响。仿真结果表明,当位移电压转换系数αp为1000 m/V时,PSD的响应时间较短,激光追踪测量系统动态响应的超调量低、稳定时间短、动态超调误差小。实验结果表明,αp越大,PSD光电转换电路输出的电压误差越大,对激光追踪测量系统性能的影响也越大。当αp=1000 m/V时,PSD光电转换电路输出电压的误差最低,稳定时间最短。

In the study, a method to analyze the effect of position sensitive detector (PSD) on the performance of laser tracing measurement system is proposed. The PSD measurement principle is analyzed, and the PSD measurement model is established in the laser tracing measurement system. A simulation model of the laser tracking measurement system is built using Matlab/Simulink software, and the influence of the displacement voltage conversion coefficient of PSD on the performance of the laser tracing measurement system is simulated and analyzed. Simulation results show that when the displacement voltage conversion coefficient αp is 1000 m/V, the response time of PSD is short, the overshoot of the dynamic response of the laser tracing measurement system is low, the stability time is short, and the dynamic overshoot error is small. Experimental results show that the greater the αp, the greater the voltage error output by the PSD photoelectric conversion circuit, and the greater the impact on the performance of the laser tracing measurement system. When αp=1000 m/V, the error of the output voltage of the PSD photoelectric conversion circuit is the lowest, and the stabilization time is the shortest.