双相机工业摄影测量系统测量性能测试方法研究

Study on measurement performance test method of dual camera industrial photogrammetry system

双相机工业摄影测量系统的广泛应用使其测量性能越来越受到关注,如何准确合理地评价系统的测量性能,并制定相应检定规范是目前亟待解决的问题。针对双相机系统测量性能的测试问题提出一套系统的方法:首先对双相机系统的摄影距离和基线长度等结构参数进行实验,并选择最佳参数进行系统的测量性能测试;然后对双相机的测量重复性、三维坐标测量准确度与长度测量准确度进行测评;最后通过以上3个评价指标对双相机系统测量性能进行总体分析与评价。该方法测得某型双相机的自身测量重复性为0.027 mm,三维坐标测量准确度为0.060 mm,长度测量准确度为0.062 mm。据此推荐用测量重复性、三维坐标测量准确度、长度测量准确度3个指标对系统进行评价。

The measurement performance of dual camera industrial photogrammetry system has attracted increasingly wide attentions. How to evaluate its measurement performance precisely and rationally and make a corresponding verification specification are current problems demanding prompt solution. A systematic method has been proposed to test the measurement performance of the dual camera industrial photogrammetry system： Firstly,the structural parameters such as shooting distance and baseline length were analyzed and the best results among them chosen to test the measurement performance of the system. Secondly, the measurement repeatability, the 3D coordinate measurement accuracy and the length measurement accuracy were tested and evaluated. Thirdly, the measurement performance was analyzed and evaluated through the three indicators above in general. The experimental results show that the measurement repeatability of the dual camera is 0.027 mm,the 3D coordinate measuring accuracy is 0.060 mm,and the length measurement accuracy is 0.062 mm. It is recommended that the accuracy of the system is evaluated by three indexes,which are the measurement repeatability,the 3D coordinate measurement accuracy, and the length measurement accuracy.