传统的激光测距方法是通过计算激光在整数个系统时钟周期内传输的距离实现的。对于测量精度要求较高的系统, 此种方法不可采取。根据多通道激光三维雷达系统的需要, 解决每一通道的内光路脉冲与系统测量时钟之间延时量的技术问题, 提出了一种基于时间数字转换(TDC)算法的激光内光路矫正方法, 并采用verilog实现基于TDC算法的IP核设计, 并高度集成于多通道采集系统中, 算法的时间分辨率可达100 ps, 提高了激光三维雷达的多通道距离测量精度。

The traditional laser ranging is by the way of computing the laser propagation in integer system clock cycles.The fine correction of laser light path based on TDC algorithm is introduced in this papaer. By getting the delay between laser pulse and system clock in each channel, the measurement precision of the multichannel data arrival time in 3D laser radar was improved.An IP based on TDC algorithm is integrated in the multichannel data acquisition system with time resolution reaching 100 ps.