应用激光跟踪仪和单目视觉检测三维水模体定位精度方法研究  

A detection method for positioning accuracy of 3D phantom system based on laser tracker and monocular vision

作　　者：韩连福[1,2] 褚芃 罗明哲 白娴靓 李加福 朱小平 HAN Lianfu;CHU Peng;LUO Mingzhe;BAI Xianliang;LI Jiafu;ZHU Xiaoping(College of Physics and Electronic Engineering,Northeast Petroleum University,Daqing 163000,China;College of Electrical and Automation Engineering,Changshu Institute of Technology,Suzhou 215000,China;National Institute of Metrology,Beijing 100029,China;Beijing Guoke Junyou Engineering Consulting Co.,Ltd.,Beijing 100086,China)

机构地区：[1]东北石油大学物理与电子工程学院,黑龙江大庆163000 [2]常熟理工学院电气与自动化工程学院,江苏苏州215000 [3]中国计量科学研究院,北京100029 [4]北京国科军友工程咨询公司,北京100086

出　　处：《中国测试》2024年第2期14-21,共8页China Measurement & Test

基　　金：国家自然科学基金(51774092);黑龙江省自然科学基金(LH2020E012);江苏省高校“青蓝工程”基金(202202)。

摘　　要：针对三维水模体检测方法较少、检测过程复杂等问题,提出基于激光跟踪仪和单目视觉的三维水模体定位精度检测方法。激光跟踪仪三维水模体定位精度检测对比实验验证三维水模体在有水和无水的情况下定位精度一致。单目视觉三维水模体定位精度检测实验结果表明:X轴、Y轴、Z轴和空间对角线的定位误差均在0.050 mm以内,重复性分别为0.030 mm,0.064 mm,0.056 mm,0.140 mm,X轴和Y轴的垂直度为0.800 mm,Y轴和Z轴的垂直度为0.761 mm,X轴和Z轴的垂直度为0.503 mm,与激光跟踪仪的测量精度在一个量级。最后,经不确定度分析得到相邻点距离测量误差的标准差为0.0187 mm,满足检测要求。两种方法都能实现非接触测量,简化冗杂的检测过程,可满足医院对医用直线加速器的日常检测需求。Aiming at the problems of fewer detection methods of medical 3D phantom and complicated detection process,a measurement system of positioning accuracy of 3D phantom system based on monocular vision and laser tracker is proposed.The comparison experiment of the positioning accuracy of 3D phantom system based on the laser tracker verifies that the positioning accuracy of the 3D phantom system is consistent in the presence and absence of water.The experimental results of the positioning accuracy of 3D phantom system based on monocular vision show that the positioning error of the X axis,Y axis,Z axis and spatial diagonal line is within 0.050 mm,the repeatability is 0.030,0.064,0.056,0.140 mm,the verticality of the X axis and Y axis is 0.800 mm,the verticality of the Y axis and Z axis is 0.761 mm,and the verticality of the X axis and Z axis is 0.503 mm,which is comparable to the measurement accuracy of the laser tracker.Finally,the standard deviation of the distance measurement error of adjacent points is 0.0187 mm after uncertainty analysis,which meets the detection requirements.Both methods can realize non-contact measurement,simplify the complicated detection process,and meet the daily detection needs of the hospital for medical linear accelerator.

关 键 词：三维水模体 激光跟踪仪 单目视觉 定位精度 

分 类 号：TB921[一般工业技术—计量学]