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Calibration and Analysis for Probing Size Error of Industrial CT |
WANG Yi-xu1, SHI Yu-shu2,3, GAO Si-tian2, LI Dong-sheng1, LI Wei2, LI Qi2, SONG Xu1 |
1.College of Engineering Measurement, China Jiliang University, Hangzhou, Zhejiang 310018, China;
2.National Institute of Metrology, Beijing 100013, China;
3.State Key Laboratory of Precision Measuring Technology & Instrument, Tianjin University, Tianjin 300072, China |
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Abstract According to the needs of calibrating the probing size error, a method based on the standard balls for the calibration of industrial CT probing size error is proposed and factors which cause the probing size error are detailly analyzed. Firstly, it calibrates the diameter by the length-measuring machine of National Institute of Metrology, then calibrates the industrial CT probing size error by these balls. The experimental results show that these standard balls can be calibrated accurately, and high quality image with lower artifacts can be acquired. And this kind of standards can meet the calibration needs of probing size error of industrial CT system. Error sources in imaging process, which influence the probing size error are discussed and analyzed. It is of great significance to establish calibration and traceability method for industrial CT system.
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