基于激光跟踪仪折射补偿的三维模体定位精度原位检测方法

doi:10.3969/j.issn.1000-1158.2022.10.04

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摘要提出了基于激光跟踪仪折射补偿的三维模体定位精度原位检测方法,建立了ADM和IFM测距误差补偿与靶球空间位置坐标求解模型,进行了理论模型验证实验与三维模体定位精度检测对比实验,实现了激光跟踪仪在玻璃介质下的高精度测量。实验结果表明:X、Y、Z坐标补偿前后的平均偏差分别由3.410mm、0.407mm、1.732mm减小到0.022mm、0.015mm、0.035mm,相邻点距离的平均偏差由0.266mm减小到0.017mm,与空气中激光跟踪仪的测量精度相当。在此基础上,以无玻璃遮挡的悬挂式检测方法为基准,两种方法测得的定位误差基本吻合。最后,利用蒙特卡洛法分析得到相邻点距离测量误差的标准差为0.012mm,满足检测要求。

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	纪振超
	李加福
	杜华
	朱小平
	张辉
	禹静

关键词 ：计量学;三维模体;定位精度;激光跟踪仪;折射补偿, 放疗剂量验证

Abstract：A detection method of the positioning accuracy of medical 3D phantom based on laser tracker refraction compensation is proposed, and the model of ADM and IFM ranging error compensation and space position coordinates solution of target ball is established, and theoretical model verification experiment and contrast experiment of 3D phantom positioning accuracy detection are carried out, and the high precision measurement of laser tracker in glass media is realized. The experimental results show that the average deviation of X, Y, and Z coordinates is respectively reduced from 3.410mm, 0.407mm, 1.732mm to 0.022mm, 0.015mm, 0.035mm, and the average deviation of the distance between adjacent points is reduced from 0.266mm to 0.017mm before and after compensation, which is equivalent to the measurement accuracy of the laser tracker in the air. On this basis, taking the suspension detection method without glass shielding as the reference, the positioning errors measured by the two methods are basically consistent. Finally, using Monte Carlo method, the standard uncertainty of the distance error between adjacent points is 0.012mm, which can meet the detection requirement.

Key words： metrology;3D phantom;positioning accuracy;laser tracker;refraction compensation radiation dose verification

收稿日期: 2021-04-07 发布日期: 2022-10-14

PACS:	TB921
	TB98

基金资助:质量技术监督能力提升专项(ANL1822);中国计量科学研究院基本科研业务费(AKYZD1908-2)

通讯作者: 杜华(1972-),河南郑州人,中国计量科学研究院高级工程师,主要从事精密仪器及测试技术研究。Email: duh@nim.ac.cn E-mail: duh@nim.ac.cn

作者简介: 纪振超(1996-),浙江湖州人,中国计量大学硕士研究生,研究方向为几何量计量及空间尺寸精密测量技术。Email: 949826536@qq.com

引用本文:

纪振超,李加福,杜华,朱小平,张辉,禹静. 基于激光跟踪仪折射补偿的三维模体定位精度原位检测方法[J]. 计量学报, 2022, 43(10): 1262-1270.
JI Zhen-chao,LI Jia-fu,DU Hua,ZHU Xiao-ping,ZHANG Hui,YU Jing. A Detection Method for Positioning Accuracy of 3D Phantom System in Situ Based on Refraction Compensation of Laser Tracker. Acta Metrologica Sinica, 2022, 43(10): 1262-1270.

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