本文提出了用高精度正交三坐标测量机作为空间位置基准,校准便携式三坐标测量臂空间位置误差的方法。采用Denavit-Hartenbeng方法建立了测量臂的测量方程及误差模型。测量臂给出其工作空间内三维坐标位置的测量值与三坐标测量机提供的标准值,分别代入测量臂的误差模型,以误差模型的计算结果作为补偿量,建立误差数据库,直接对测量臂空间位置误差进行校准和误差补偿。利用海克斯康G9128三坐标测量机对FARO便携式三坐标测量臂校准和误差补偿进行了实验研究,并对误差补偿前后实验结果进行了分析与讨论。研究结果表明该方法可有效、快速地对便携式三坐标测量臂空间位置误差进行校准和补偿。
Based on the standard provided by a high-accuracy orthogonal coordinate measuring machine(CMM),a new technique for 3D coordinate position error calibration of portable coordinate measuring arm(PCMA) is presented.Using Denavit-Hartenberg analysis arithmetic,the measuring equation and error mathematics model of PCMA are established.The measured results of PCMA and nominal values provided by CMM are substituted to error model,compare the corresponding results and build error database of PCMA,which can be used ...