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分析了三维几何量测量中坐标系的建立方法，提出了刚性坐标系和柔性坐标系的概念，发展了三维几何量测量的一个新概念、新方法──自适应坐标系。仿真装配过程．坐标系具有自适应性，可使虚检率降低，提高经济效益。
The method of establishing coordinate system in three-dimensional geometric quantity measurement is analyzed. The concepts of rigid coordinate system and flexible coordinate system are put forward. A new concept and new method of three-dimensional geometric quantity measurement is developed, namely adaptive coordinate system. Simulation assembly process. Coordinate system with adaptive, can reduce the false detection rate, improve economic efficiency.