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1.中国航发北京航空材料研究院 先进高温结构材料重点实验室,北京 100095
2.中国航发四川燃气涡轮研究院,四川 成都 610500
3.西北工业大学 航空发动机高性能制造工信部重点实验室,陕西 西安 710072
Received:09 November 2022,
Revised:28 November 2022,
Published:10 June 2023
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杨泽南,黄子婴,查海勇等.基于森林球的工业CT测量不确定度评定与分析[J].光学精密工程,2023,31(11):1672-1683.
YANG Zenan,HUANG Ziying,ZHA Haiyong,et al.Measurement uncertainty evaluation and analysis for industrial computed tomography based on forest balls[J].Optics and Precision Engineering,2023,31(11):1672-1683.
杨泽南,黄子婴,查海勇等.基于森林球的工业CT测量不确定度评定与分析[J].光学精密工程,2023,31(11):1672-1683. DOI: 10.37188/OPE.20233111.1672.
YANG Zenan,HUANG Ziying,ZHA Haiyong,et al.Measurement uncertainty evaluation and analysis for industrial computed tomography based on forest balls[J].Optics and Precision Engineering,2023,31(11):1672-1683. DOI: 10.37188/OPE.20233111.1672.
针对工业CT实际检测中涉及的零件材质与尺度跨度较大,且采用非金属森林球来评定工业CT测量不确定度存在适用性和可靠性不足的问题,基于不同材质森林球进行了工业CT测量不确定度评定,获得了标准器材质对测量不确定度的影响规律。根据工业CT的常用测量范围,设计制作了3种不同材质的森林球标准器,并用三坐标测量机进行标定,然后采用工业CT分别扫描和测量计算,实现了对不同材质森林球直径及球心距的测量不确定度评定。实验结果表明:材质对球直径测量的扩展不确定度影响不显著;球心距测量的扩展不确定度随尺寸的增大而增大,其中非金属陶瓷球和红宝石球标准器的扩展不确定度均值相当,平均值约为0.003 5 mm,而钢球标准器则较之增大了3.4倍,达到0.012 2 mm;球心距测量存在明显的系统误差,标准器材质的影响不显著。基于不同材质森林球的球心距测量对工业CT测量不确定度标准器的选用及校准具有重要的指导意义。
Non-metallic forest balls are often used to evaluate the measurement uncertainty of industrial computed tomography (CT) detection involved the material and scale of parts actually are large, which has introduced the problem of insufficient applicability and reliability. In this study, the uncertainty of industrial CT measurement was evaluated according to forest balls made of different materials, and the effects of the materials on the uncertainty were examined. First, we designed and fabricated three types of standard forest balls with different materials and calibrated them using a CMM according to the commonly used measurement range of industrial CT. Then, we performed evaluation and analysis of the measurement uncertainty for the diameter and center distance from forest balls based on industrial CT scanning and measuring. The results indicated that the influence of the material on the expanded uncertainty of diameter measurement from the forest balls was insignificant. The expanded uncertainty of measurement from the balls increased with the ball center distance, and the expanded uncertainty of non-metallic balls, including a ceramic ball and ruby ball, was essentially the same: approximately 0.003 5 mm. In comparison, that of a steel ball was 3.4 times larger, reaching 0.012 2 mm. There exists a certain system error in ball center distance measurement, however, the material influence on the standard forest balls is not evident. Center distance measurement based on forest balls of different materials has engineering value for evaluating the selection and calibration of industrial CT measurement uncertainty.
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