车身局部坐标系匹配测量浅析

Discussing about Measurement and Analysis for Automobile Body Local Part Coordinate System Matching

在三坐标测量过程中,坐标系的选取非常重要,不同的建系方式产生不同的坐标系,所测得的结果也不同,所给人们的反馈也不同,由整体看局部往往未必能将问题分析透彻,将所有异常解释清楚。因此,若在车身上处在较独立位置的区域,遇到匹配问题,则尽量使用该区域的特征元素作为基准建立局部坐标系,可更明显看出各位置坐标偏移量,更容易对照问题进行分析。

The selection of coordinate system is very important for CMM.Different choise may cause different results,people could also get different information.It is not accurate to see wholely the part.Therefore,when the matching problem occurs in the area of independent position on the vehicle body.The elements of the area should be used as the benchmark to establish the local coordinate system,which can more clearly see the coordinate offset of each position,and easier to analyze against the problem.