【摘要】 车身偏差测量的基准坐标系包括全局坐标系和局部坐标系。本文分析了在局部坐标系基准点存在偏差的情况下,测点偏差在全局坐标系和局部坐标系下测量值的关系,并建立起了数学模型。借助生产制造过程中的实际数据,对数学模型进行了验证。应用建立起的数学模型,解释了测量工作中普遍存在的一些现象。论证了以局部坐标系代替全局坐标系进行偏差测量的可行性。为方便坐标转换矩阵的工程应用,本文还将研究出的算法编写成了界面程序,程序可将测点偏差在不同基准坐标系之间进行转换。更多还原

【Abstract】 In the deviation measurement of autobody,both global coordinate system and local coordinate system are widely used.Usually,the reference points of local coordinate system are not in their theoretic position.It analyzed the measurement results between global coordinate system and local coordinate system.Furthermore,it established a mathematical model for the transformation.Based on the data obtained from manufacturing factory,it verified the reliability of the mathematical model.According to the established mathematical model,some phenomenon existing in the measure results can be well explained.It demonstrated the feasibility of using local coordinate system to replace global coordinate system in deviation measurement.For the convenience of the engineering application,we programmed the coordinate transformation matrix into an interface program.The interface program can achieve variation transform among different coordinate system.更多还原