高精度激光脉冲测距技术

High precision laser pulse distance measuring technology

激光测距技术是影响机载三维激光雷达性能的重要因素,研制高精度的激光测距系统对提高机载三维激光雷达的性能具有重要意义。开展了激光脉冲静态测距实验研究,对弱光探测和时间间隔测量技术进行了相应的研究,建立了激光测距实验平台和测量装置。通过选择合适的光电探测器和高性能的时间测量电路,初步实现了高精度激光脉冲静态测距,激光测距精度优于2.0 cm,平均误差不超过1.5 cm,达到了国内先进水平。实验结果充分证实了弱光探测和时间测量技术的可行性,为开展激光脉冲快速扫描测距积累了经验。

Laser distance measuring technology is an important influence factor to the capability of LIDAR. It is very important to develop high precision laser distance measuring system to improve the capability of LIDAR. The experiment of laser pulse distance measuring was carried out, and relevant research on weak light detecting and time interval measuring technology were started then the laser distance measuring experiment platform and measuring equipments were established. High precision laser pulse distance measuring under quiescent state was primarily realized by selecting excellent photodetector and designing high capability time interval measuring circuit. The distance measuring precision was better than 2.0 cm and the average relative error was less than 1.5 cm, which reached domestic advanced level. The experimental results of the laser pulse distance measuring under quiescent state prove that the weak light detecting and time interval measuring technology is feasible, and experience is accumulated for laser pulse distance measuring under scanning state.