基于工业CT直径测量的不确定度评估技术研究  

Uncertainty evaluation of diameter measurement based on industrial CT

作　　者：齐子诚[1,2] 倪培君[1] 唐盛明[1] 郭智敏[1] 王晓艳[1] 

机构地区：[1]中国兵器科学研究院宁波分院,浙江宁波315103 [2]浙江工业大学机械工程学院,浙江杭州310014

出　　处：《兵器材料科学与工程》2017年第6期96-99,共4页Ordnance Material Science and Engineering

基　　金：国家自然科学基金(61471411);浙江省自然科学基金(LQ15E010003);宁波国际科技合作项目(2015D10005);宁波市自然科学基金项目(2016A610247)

摘　　要：为解决工业CT直径测量值缺乏溯源性、不确定度成分难以量化的问题,对工业CT测量直径结果的主要误差源进行合理简化,建立工业CT测量不确定度评定模型,根据GUM法得到各个主要误差源的传递因数。最后,以高能6 Me V工业CT线阵探测器系统对已校准的?12 mm直径量块进行测量及评价实验。置信区间为95%时,评定直径测量的扩展不确定度为0.08 mm,具有可靠的理论依据和较稳定的评定结果。此不确定度评估方法可结合实际测量系统在各种直径测量中进行推广使用。In order to solve the problem that the measurement value of industrial CT diameter is not traceable and the uncertainty component is difficult to be quantified,the main error source of industrial CT measurement diameter was simplified and the uncertainty model of industrial CT measurement was established. According to GUM method,the transfer factor of the main error source was obtained. Finally,the calibrated ？12 mm diameter block was measured and evaluated by a high energy 6 Me V industrial CT linear array detector system. When the confidence interval is 95%,the extended uncertainty of the measured diameter is 0.08 mm,and it has a reliable theoretical basis and a more stable assessment of the results. This uncertainty assessment method can be used for various diameter measurements in combination with the actual measurement system.

关 键 词：工业CT 直径测量 不确定度 半高宽法 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]