坐标测量机的新发展——并联运动机构坐标测量机

从空间机构学的角度出发,可将坐标测量机分为串联机构坐标测量机和并联机坐标测量机两大类.由于并联机构坐标测量机测量精度高,测头位姿灵活,同时又具有“硬件”简单,“软件”复杂的特点,因而,正在成为坐标测量机领域研究的新热点.文章首先分析了普通笛卡尔串联机构坐标测量机的发展现状及存在问题,然后介绍了并联机构坐标测量机的结构及特点,并对国内外有关并联运动机构理论及其在坐标测量机领域的研究现状与发展趋势进行了综述,最后,对并联机构坐标测量机研究过程中应注意的主要问题进行了探讨.

New type of CMM-Parallel mechanism coordinate measuring machine

According to the theory of spatial mechanics, CMM(Coordinate Measuring Machine)can be classified as two groups, that is the serial-mechanism CMM and the parallel-mechanism CMM. Generally, the parallel-mechanism CMM has higher measuring accuracy and more flexible probe posture than the serial-mechanism CMM. Secondly, the parallel-mechanism CMM is of high technical additional value because its ‘hardware' is simple and the ‘software' is complex. Therefore, theoretical and experimental research for this new kind of CMM has currently become a hot topic for both industry and academia. In this paper, the state-of-the-arts and the drawbacks of Cartesian CMM are discussed and the characteristics of the parallel-mechanism CMM are introduced. Then the theoretical base, the research situation and the trend about the parallel-mechanism CMM around the world are synthesized. Finally, the problems, which should be noticed in researching the new CMM, are discussed.