The MFL Device to Detect the Longitudinal Cracks of the Oil Tank Corners Based on LabVIEW
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摘要: 针对机动车油箱等容器棱角处纵向裂纹难以检测的问题，研制了一种基于差动式霍尔元件的多功能油箱漏磁检测装置。检测探头由两个霍尔元件构成差动式结构，以消除干扰磁场的影响，提高了检测系统的灵敏度；通过更换不同型号的励磁极靴分别实现油箱平面及棱角处纵向裂纹的检测；通过光电编码器使数据采集卡外触发实现了空域等距采样，进而实现对裂纹的定位。对含预制纵向裂纹的机动车油箱进行了漏磁检测试验，结果表明，该检测系统对油箱棱角处的内部纵向裂纹具有良好的辨识能力，能够推广到实际工业应用中。Abstract: In order to overcome the difficulties in detecting the longitudinal corner cracks of containers, such as motor vehicle oil tanks, are difficult to detect, a multifunctional system used to detect magnetic flux leakages of tanks is designed and developed based on differential hall probes. The detection probe is made of two elements forming the structure of differential type, make up the detection probe, which can improve the sensitivity of detection system. By switching different pole shoes, cracks of the plane and the corners can be detected respectively. As an external trigger, the photoelectric encoder can collect data at the same distance each time, to determine where the defect exists accurately. Through carrying experiments on the fuel tank belonging to a heavy armored vehicle with prefabricated defects, acquired results show that the detection system can identify the the longitudinal cracks inside the tank, then it can be promoted to industrial applications.
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Keywords:
- Magnetic flux leakage detect /
- Hall probe /
- Differential probe /
- Longitudinal crack
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[1] ATHERTON D L. Magnetic inspection is key to ensuring safe pipelines[J]. Ndt & E International, 1997,32(32):40-41.
[2] 杨理践,王玉梅. 智能化管道漏磁检测装置的研究[J]. 无损检测,2002,24(3):100-102. [3] 宋小春,黄松岭,赵伟,等. 高清晰度储罐底板漏磁检测器的研制[J]. 化工自动化及仪表, 2007,34(1):77-80. [4] 陈锡辉,张银鸿. LabVIEW程序设计从入门到精通[M]. 北京:清华大学出版社,2007. [5] VLADIMIR Z, KAREN W, DAVE G, et al. MWM eddy-current arrays for crack initiation and growth[J]. International Journal of Fatigue,2003,25:1147-1155.
[6] 蒋奇管. 道缺陷漏磁检测量化技术及其应用研究[D]. 天津:天津大学,2002. [7] 陈蓉,于润桥,马娟. 焊缝漏磁检测探头的实验研究[J]. 南昌航空大学学报, 2007,21(增刊):154-157.
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