关键词: 三坐标测量；举升系统；坐标系；整车尺寸

Abstract: The automobile components are numerous, the processes are lengthy, and controlling the dimensions during the production process is difficult. There is no direct means to obtain vehicle dimension data for vehicles coming off the assembly line. Based on the characteristics of double-arm three-coordinate measurement, with the goal of minimum cost and universal applicability, and without affecting or damaging the vehicles or the premises, a lifting system is introduced. The existing measurement platform is upgraded and modified to cover the measurement of existing massproduced vehicle models in the company. In order to ensure the consistency and accuracy of the vehicle measurement data, the coordinate system is established by selecting the same positioning reference for the vehicle body fixtures and gauges, in coordination with the vehicle assembly process and standards, to directly obtain the dimensions of vehicle parts. After experimental verification, this method has low investment costs, high universality, accurate data, and is suitable for application in the measurement of complete vehicle products by automotive companies to determine the status of vehicle body product dimensions.

Key words: three-coordinate measurement; lifting system; coordinate system; overall vehicle dimensions