工业计算机断层成像几何尺寸测量不确定度评定  

Uncertainty determination for dimensional measurements with industrial computed tomography

作　　者：李敬[1] 李寿涛 程云[1] 刘清华[1] 陈云斌[1] LI Jing;LI Shoutao;CHENG Yun;LIU Qinghua;CHEN Yunhin(Institute of Applied Electronics,Chinese Academy of Engineering,Mianyang 621900,China)

机构地区：[1]中国工程物理研究院应用电子学研究所,绵阳621900

出　　处：《无损检测》2021年第1期24-28,共5页Nondestructive Testing

摘　　要：介绍了一种基于试验的工业计算机断层成像(CT)尺寸测量不确定度的评定与分析方法,通过一系列重复测量,获得了工业CT尺寸测量不确定度分量和扩展不确定度,所有测量结果均位于亚像素范围,系统误差是试验主要的不确定度分量,可以满足实际应用中对工业CT尺寸测量不确定度评定的要求。This paper presents a method to determine the uncertainty of dimensional measurements with industrial computed tomography(CT)based on experimental evaluation method.Subsequently,some of the uncertainty budget and the expanded uncertainty are quantified based on a series of measurements.The uncertainty in measurement is within the sub-pixel region for all measures.The systematic bias is the main contributor for all measurement results.The results show that the proposed method can be a suitable approach for CT measurement uncertainty assessment in practical applications.

关 键 词：工业CT 尺寸测量 不确定度评定 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术] TG115.28[自动化与计算机技术—计算机科学与技术]