大量程激光测距仪精度检测系统

摘要

The ranging precision is an important indicator to measure the performance of laser rangefinder. A detection system of ranging precision for 1 064 nm, 1 540 nm, and 1 570 nm wavelength rangefinder was introduced. The system consists of distance simulator and laser radiation simulator. Radiation simulator can generate an echo pulse with width among 5∼250 ns and the maximum peak power 0.1 W. FPGA-based distance simulator can realize distance simulation during 50 m∼990 km. The closed-loop detection method between radiation simulator and distance simulator is proposed and realized. According to the method, the fixed error of detection system is measured and eliminated. The detection results show that the distance simulation error is less than 1 meter in full simulation scale.%　　激光测距仪的测距精度是衡量其性能的重要指标.本文设计了测距精度检测系统，可实现1064 nm、1540 nm、1570 nm三个波长的测距仪精度检测.该系统由激光距离模拟器和激光辐射模拟器组成，辐射模拟器可产生脉宽5∼250 ns、最大峰值功率0.1 W的回波脉冲；基于FPGA的距离模拟器可以实现50 m∼990 km的大量程距离模拟.本文提出并实现辐射模拟器和距离模拟器的闭环检测，以此测量消除系统固定误差.经过检测该系统全量程内距离模拟误差都小于1 m.