Title :
Improving SNR of MFL Signal in Flaw Detection of Coal Mine Wire Ropes
Author :
Hua, Gang ; Wang, Hong-Yao ; Chen, Feng-Jun ; Lu, Yan-Hong ; Xu, Zhao ; Tian, Jie ; Zhou, Bing-Bing
Author_Institution :
Sch. of Inf. & Electr. Eng., China Univ. of Min. & Technol., Xuzhou, China
Abstract :
Magnetic flux leakage detection (MFL) is widely used as an effective method in detection of broken wires of ropes. In order to improve the accuracy of flaw detection using MFL signal, the effect of the distance between a sensor and the surface of a wire rope (i.e. lift-off) is investigated. The main principles for the choice of lift-off are analyzed, and a method is proposed from the point of view of the magnetic circuit design to restrain the impact of fluctuations of sensor lift-off and improve the signal-tonoise ratio (SNR) of MFL signal. The method is validated through computer simulation and laboratory experiment. The results show that the SNR of MFL signal in flaws detection of wire ropes can be increased by over 25%.
Keywords :
cables (mechanical); flaw detection; magnetic flux; magnetic sensors; ropes; SNR; coal mine wire rope; flaw detection; magnetic circuit design; magnetic flux leakage detection; sensor lift-off; signal-to-noise ratio; Fluctuations; Leak detection; Magnetic analysis; Magnetic circuits; Magnetic flux leakage; Magnetic sensors; Signal analysis; Signal design; Signal detection; Wire;
Conference_Titel :
Image and Signal Processing, 2009. CISP '09. 2nd International Congress on
Conference_Location :
Tianjin
Print_ISBN :
978-1-4244-4129-7
Electronic_ISBN :
978-1-4244-4131-0
DOI :
10.1109/CISP.2009.5304462
