| 激光内径测量系统参数校正及算法优化 |
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| 引用本文： | 张福民,曲兴华,刘红轩.激光内径测量系统参数校正及算法优化[J].纳米技术与精密工程,2011,9(5):459-463. |
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| 作者姓名： | 张福民 曲兴华 刘红轩 |
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| 作者单位： | 天津大学精密测试技术及仪器国家重点实验室,天津,300072 |
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| 基金项目： | 高等学校博士学科点专项科研基金资助项目(20100032120062); 天津市应用基础及前沿技术研究计划资助项目(11JCYBJC01000) |
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| 摘 要： | 基于激光位移扫描的大尺寸内径测量系统中,测量数据存在多个系统误差参数并易受到粗大误差的影响.在分析该系统工作原理的基础上,分析了测量传感器安装倾斜误差和回转臂偏心误差,并提出了相应的校正补偿方案.针对动态测量、管壁划痕、斑迹等引入的粗大误差对测量数据的最小二乘圆拟合精度影响较大的问题,提出了一种剔除粗大误差的方法:根据最小平方中值法构建基准圆,剔除孤立点,再用最小二乘法拟合,实验结果表明该算法的精度优于直接最小二乘法5倍.
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| 关 键 词： | 激光三角扫描 倾斜校正 偏心误差 最小平方中值 最小二乘法 |
Parameter Calibration and Optimization Algorithm for Laser Inner Diameter Measurement System |
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| ZHANG Fu-min,QU Xing-hua,LIU Hong-xuan.Parameter Calibration and Optimization Algorithm for Laser Inner Diameter Measurement System[J].Nanotechnology and Precision Engineering,2011,9(5):459-463. |
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| Authors: | ZHANG Fu-min QU Xing-hua LIU Hong-xuan |
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| Affiliation: | ZHANG Fu-min,QU Xing-hua,LIU Hong-xuan (State Key Laboratory of Precision Measurement Technology and Instruments,Tianjin University,Tianjin 300072,China) |
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| Abstract: | Measurement data are affected by system error parameters and gross error presented in large-scale inner diameter measurement system based on laser displacement scanning method.Firstly,the working principle of the measurement system was explored.Then,the tilt error of laser displacement sensor and eccentricity error for measuring arms were analyzed,and the methods for correction and compensation schemes were proposed.For the inner circle fitting algorithm,the parameters of inner circle are easily influenced ... |
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| Keywords: | laser triangulation scanning slant correction eccentricity error least median squares least square method |
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