A Global Calibration Method for Multisensor Metrology System

Abstract

Abstract:

Focusing on multisensor metrology system consisting of trigger and arm laser scanner in a complex surface part manufacturing process,a global calibration method was proposed based on hexahedron.The global calibration mathematical model based on unit quaternion method was constructed.Aiming to determine the optimal rigid transformation matrix,mathematical morphology was applied to cluster analysis on unit quaternion sphere.The simulation and industrial examples demonstrate this method is convenient,accurate and be fit for on machine metrology system calibration.

Key words: multisensor metrology, global calibration, unit quaternion, point cloud, mathematical morphology

摘要：

针对复杂曲面零件加工中由触发式测头－关节臂激光扫描仪组成的多传感器测量系统，提出了六面体零件作为模板的全局标定方法,建立了基于单位四元数的全局标定数学模型,并用数学形态学方法在单位四元数球上进行聚类分析以确定最优的刚体变换矩阵。仿真和试验结果表明，该方法应用简单、鲁棒性好、精度高，适用于加工现场的在机测量系统标定。


关键词: 多传感器测量, 全局标定, 单位四元数, 点云数据, 数学形态学

CLC Number:

TH706

MAO Lu-Xi, YIN Zhou-Beng, XIONG Wei-Lun. A Global Calibration Method for Multisensor Metrology System[J]. China Mechanical Engineering, 2012, 23(12): 1428-1432.

牟鲁西, 尹周平, 熊有伦. 一种多传感器测量系统全局标定方法[J]. 中国机械工程, 2012, 23(12): 1428-1432.

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