基于背景光抑制的自触发激光测距系统设计

Design of Laser Ranging System Based on Background Light Suppression

为有效降低背景光对脉冲激光测距系统精度的影响,提出了一种基于背景光抑制的脉冲激光测距系统设计方法。首先基于脉冲激光TOF(time-of-flight)测距原理构建了一套激光测距系统;然后结合采样保持电路实现背景光的抑制;最后基于自触发原理实现激光回波对激光发射器的控制,采用多次测量求取平均值的方法,达到减小测量误差的目的。实验结果表明,该方法能够有效减小测距误差,满足实际测量需求。

In order to effectively reduce the impact of ambient light on the accuracy of the pulsed laser ranging system,a de-sign method for the pulsed laser ranging system based on background light suppression is proposed.Firstly,a laser ranging system is constructed based on the principle of(time-of-flight)TOF,and then combined with a sample-and-hold circuit to suppress the background light,and finally based on the principle of self-triggering to achieve the control of the laser echo on the laser transmit-ter,using the method of multiple measurements then taking the average value to reduce the measurement error.The experimental re-sults show that this method can effectively reduce the ranging error and meet the actual measurement requirements.