基于等间距线的远距离激光测距传感器误差校正  

Error correction of long-distance laser ranging sensors based on equidistant lines

作　　者：江锐 刘锋 江勇 JIANG Rui;LIU Feng;JIANG Yong(School of Physics and Electronic Engineering,Hanjiang Normal University,Shiyan Hubei 442700,China)

机构地区：[1]汉江师范学院物理与电子工程学院,湖北十堰442700

出　　处：《激光杂志》2025年第2期88-93,共6页Laser Journal

基　　金：湖北省教育厅科学研究计划指导性项目(No.B2019192)。

摘　　要：当激光光束通过光学组件时,会发生衍射和散焦现象,使不同部位的光信号受到一定程度的影响,产生空间上的非线性畸变,导致远距离激光测距传感器产生误差,因此,提出基于等间距线的远距离激光测距传感器误差校正方法。在二维坐标系内,利用等间距线计算畸变参数,校正远距离激光测距传感器非线性畸变。基于激光扫频干涉原理,通过相位变化量补偿测距信号相位,校正目标运动造成的测量误差。结合倾角与误差之间的线性关系,构建支持向量机回归模型,预测远距离激光测距传感器倾角误差并校正。实验结果表明,所研究方法的PLCC和SROCC分别达到了0.935与0.876,说明非线性畸变校正较好;相位补偿校正后,频谱分辨力为12.56 mm,差值仅为0.06 mm;相较于其他对比方法,多个测点下的测距结果始终与实际距离最为接近。When the laser beam passes through optical components,diffraction and defocusing phenomena occur,which affect the optical signals of different parts to a certain extent,resulting in spatial nonlinear distortion and errors in long-distance laser ranging sensors.Therefore,a method for correcting errors in long-distance laser ranging sensors based on equidistant lines is proposed.Calculate distortion parameters using equidistant lines in a two-dimensional co-ordinate system to correct nonlinear distortion in long-distance laser ranging sensors.Based on the principle of laser scanning interference,the phase change is used to compensate for the phase of the ranging signal and correct measure-ment errors caused by target motion.Based on the linear relationship between inclination angle and error,construct a support vector machine regression model to predict and correct the inclination angle error of long-distance laser ranging sensors.The experimental results show that the PLCC and SROCC of the studied method reach 0.935 and 0.876,re-spectively,indicating good nonlinear distortion correction;After phase compensation correction,the spectral resolution is 12.56 mm,with a difference of only 0.06 mm;Compared to other comparison methods,the distance measurement results under multiple measurement points always approach the actual distance the closest.

关 键 词：激光测距传感器 等间距线 激光扫频干涉 支持向量机 误差校正 

分 类 号：TN248[电子电信—物理电子学]