三维激光扫描系统的固有误差校正算法  

Inherent error correction algorithm for 3D laser scanning system

作　　者：赵中民[1] 习友宝[1] 

机构地区：[1]电子科技大学电子工程学院,四川成都611731

出　　处：《激光与红外》2016年第1期34-38,共5页Laser & Infrared

摘　　要：分析了三维激光扫描系统固有误差的来源,结合数学模型及实验数据,提出了相应的校正算法,并在实验中得到验证。从概率统计学角度分析激光测距仪固有误差的统计特性,增大平均次数的同时,减小测距仪测距误差;使用最小二乘法从实验数据中获取电机的动态角度误差,对理论角度进行校正后,得到电机实际转动角度;针对双振镜系统的非线性扫描失真,动态改变扫描范围,减小枕形误差。使用Matlab分析误差校正算法,并搭建实验平台测试上述算法,实验结果表明,对系统的测距误差、角度误差、枕形误差校正后,三维激光扫描系统的精度有较大的提高。The sources of inherent error for 3D laser scanning system are analyzed. Combined with the mathematical model and experimental data, the correction algorithm is proposed, and it is verified in experiments. The characteristics of inherent error are analyzed from the theory of statistics. Considering the output speed and accuracy, the error of laser range finder can be reduced through increasing the average number. The dynamic angle error of motors is obtained by using the least-square method, and then the actual angle is gotten after rectification. For the nonlinear scanning distor- tion of dual galvanometric system, the pillow-shaped distortion can be reduced through changing the scanning range. In this paper, the inherent error correction algorithm is analyzed by Matlab, and is verified through some experiments. The experimental results show that the precision of 3D laser scanning system has a greater increase after the correction of ranging error, angle error and pillow-shaped distortion.

关 键 词：固有误差校正 误差分析 三维激光扫描 双振镜系统 非线性失真 

分 类 号：TN249[电子电信—物理电子学]