第19卷
第10期
2011年10月
文章编号
1004-924X(2011)10-2393-09
光学精密工程
Optics and Precision Engineering
强力输送带X光无损检测仪的研制
荣锋”，苗长云，徐伟
（天津工业大学信息与通信工程学院，天津300160）
Vol.19
No. 10 Oct.2011
损检测的散射间题，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2m，运行速度为3m/s的强力输送带在线监测得到的图像空间分辨率为1.0mm×1.5mm，图像非均匀度低于2.57%，图像灰度对比度良好，0.5mm厚度钢板灰度差约为13，解决了传统的X光强力输送带无摄检测仪无法实
时在线监测的间题，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。关键调：X光无损检测；非均一性校正；强力榆送带；线降探测器
中图分类号：TG115.28
文献标识码：A
doi;10.3788/OPE.20111910.2393
Developmentofnon-destructivetesterforsteelcordconveyorbelts
RONG Feng', MIAO Chang-yun,XU Wei
DepartmentofInformationandCommunication， TianjinPolytechnic University,Tianjin300160,China) Correspondingauthor,E-mail,Shushing677@163.com
Abstract: 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 correc tion 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. O mmX1, 5 mm and the non-u-niformity 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 advan tages of intuitive, clear and so on compared with the tester designed by electromagnetic monitoring principles.
收稿日期：2010-11-03；修订日期：2011-02-15
基金项目：天津市科技支撑计划重点项目（No.08ZCKFGX02400）