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天津工业大学 信息与通信工程学院 天津,300160
收稿日期:2010-11-03,
修回日期:2011-02-15,
网络出版日期:2011-10-27,
纸质出版日期:2011-10-25
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荣锋, 苗长云, 徐伟. 强力输送带X光无损检测仪的研制[J]. 光学精密工程, 2011,19(10): 2393-2401
RONG Feng, MIAO Chang-yun, XU Wei . Development of non-destructive tester for steel cord conveyor belts[J]. Editorial Office of Optics and Precision Engineering, 2011,19(10): 2393-2401
荣锋, 苗长云, 徐伟. 强力输送带X光无损检测仪的研制[J]. 光学精密工程, 2011,19(10): 2393-2401 DOI: 10.3788/OPE.20111910.2393.
RONG Feng, MIAO Chang-yun, XU Wei . Development of non-destructive tester for steel cord conveyor belts[J]. Editorial Office of Optics and Precision Engineering, 2011,19(10): 2393-2401 DOI: 10.3788/OPE.20111910.2393.
采用X光线阵探测器研制了一种强力输送带无损检测仪。介绍了X光无损检测原理
使用准直器解决了X光无损检测的散射问题
设计了多路并行数据采集电路实现了数据的高速采集。对线阵探测器像元非均一性的原因进行了探讨
对校正算法进行了研究
基于响应模型运算量小
校正效果良好提出了的三点分段校正法。实验证明
研制的检测仪对宽度为2 m
运行速度为3 m/s的强力输送带在线监测得到的图像空间分辨率为1.0 mm1.5 mm
图像非均匀度低于2.57%
图像灰度对比度良好
0.5 mm厚度钢板灰度差约为13。解决了传统的X光强力输送带无损检测仪无法实时在线监测的问题
与电磁感应原理设计的检测仪相比
监测结果具有直观、清晰等优点。
A Non-destructive Test(NDT) for steel cord conveyor belts was developed by using an X ray detector array. The principle of X-ray NDT was introduced and a collimator was used to eliminate the X-ray scattering.An acquisition circuit for multi-channel parallel data was designed to achieve real-time data acquisition. The reason for pixel non-uniformity of the linear array detector was discussed and an algorithm to correct the pixel non-uniformity was established.Then a three-segmented correction algorithm with less computation and better correction effect was proposed based on the response model. Experiments show that the spatial resolution of the image is 1.0 mm1.5 mm and the non-uniformity of the image is below 2.57% for a steel cord conveyor belt with a width of 2 m and a speed of 3 m. Obtained image shows a good gray contrast
and its gray level difference for a 0.5 mm thick steel is about 13.The new NDT has achieved the real-time online monitoring function
and has advantages of intuitive
clear and so on compared with the tester designed by electromagnetic monitoring principles.
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