Back to Search Start Over

The Research of 30 mm Detecting Distance of Testing Device for Wire Rope Based on Open Magnetizer

Authors :
Mengqi Liu
Chi Zhang
Xiaoyuan Jiang
Yanhua Sun
Xiaotian Jiang
Ran Li
Lingsong He
Source :
Applied Sciences, Vol 12, Iss 10, p 4829 (2022)
Publication Year :
2022
Publisher :
MDPI AG, 2022.

Abstract

Wire rope will have defects such as local faults (LF) and loss of metal area (LMA) during the long-term using process. The nondestructive testing method of magnetic flux leakage (MFL) has been widely used in wire rope defect detection. Currently, the detecting distance between magnetic sensors and wire rope with the MFL method is relatively small (2–5 mm). Considering the inner surface of the sensor head is close to the wire rope, it quickly leads to the sensor head scraping off the surface oil of the wire rope or being stuck by a cut wire in the course of MFL detection. Therefore, it is challenging to realize the sensor with MFL detection of wire rope obtaining the weak signal at a large lift-off (>30 mm). This study used finite element analysis to verify if the MFL signal exists at the large lift-off (>30 mm). Meanwhile, the sensor head was improved using an open magnetizer to make the wire rope reach saturation and excite enough magnetic leakage field. By combining magnetic sensing and coupling and a weak analog signal processing method, not only was the signal effectively detected, but also the signal-to-noise ratio (SNR) was improved. Finally, experiments verify the feasibility of detecting defects at a large distance. The method also has been applied in the high-speed detection of wire rope, which can detect broken wire of 1 mm diameter.

Details

Language :
English
ISSN :
20763417
Volume :
12
Issue :
10
Database :
Directory of Open Access Journals
Journal :
Applied Sciences
Publication Type :
Academic Journal
Accession number :
edsdoj.1779c8135e0a41a28618a26d98d89a51
Document Type :
article
Full Text :
https://doi.org/10.3390/app12104829