Fault Diagnosis of Steel Wire Ropes Based on Magnetic Flux Leakage Imaging Under Strong Shaking and Strand Noises

2021 ◽  
Vol 68 (3) ◽  
pp. 2543-2553
Author(s):  
Zuopu Zhou ◽  
Zhiliang Liu
Keyword(s):  
Fault Diagnosis ◽  
Magnetic Flux ◽  
Steel Wire ◽  
Magnetic Flux Leakage ◽  
Wire Ropes ◽  
Flux Leakage

Novel algorithm for compression of magnetic flux leakage signal data obtained from wire ropes

2019 ◽  
Vol 61 (2) ◽  
pp. 76-82 ◽  
Author(s):  
Wang Hong-Yao ◽  
Tian Jie ◽  
Lv Xin ◽  
Li Xiao-Wei ◽  
Meng Guo-Ying ◽  
...  
Keyword(s):  
Magnetic Flux ◽  
Magnetic Flux Leakage ◽  
Wire Ropes ◽  
Flux Leakage ◽  
Novel Algorithm

scholarly journals The use of a magnetic flux leakage in the assessment of the technical state of a steel wire rope subjected to bending

2018 ◽  
Vol 48 (1) ◽  
pp. 493-513
Author(s):  
Paweł Mazurek ◽  
Jerzy Kwaśniewski ◽  
Maciej Roskosz ◽  
Ryszard Siwoń-Olszewski
Keyword(s):  
Magnetic Field ◽  
Steel Wire ◽  
Wire Rope ◽  
Technical State ◽  
Magnetic Flux Leakage ◽  
Wire Ropes ◽  
State Of Stress ◽  
Real Objects ◽  
The Relationship ◽  
Flux Leakage

Abstract The technical state of steel wire ropes has a decisive impact on the safety of people using the equipment in which they are installed. The basis for increasing safety is the ability to assess the condition of the working steel wire. The article presents the use of magnetometric sensors to determine the relationship between the number of steel wire rope bends and its magnetic field induction value. This knowledge, referred to ropes working on real objects, allows to determine the state of stress prevailing in them as well as their condition.

Magnetic flux leakage–based local damage detection and quantification for steel wire rope non-destructive evaluation

2017 ◽  
Vol 29 (17) ◽  
pp. 3396-3410 ◽  
Author(s):  
Ju-Won Kim ◽  
Seunghee Park
Keyword(s):  
Magnetic Flux ◽  
Damage Detection ◽  
Permanent Magnets ◽  
Steel Wire ◽  
Threshold Value ◽  
Wire Rope ◽  
Magnetic Flux Leakage ◽  
Magnetic Flux Density ◽  
Sensor Head ◽  
Flux Leakage

A magnetic flux leakage method was applied to detect damage when inspecting steel wire rope. A multi-channel magnetic flux leakage sensor head was fabricated using Hall sensors and permanent magnets to adapt to the wire rope. Three types of artificial damage were created on a wire rope specimen. The magnetic flux leakage sensor head scanned the damaged specimen to measure the magnetic flux density while the damage was expanding in three steps. Signal processing processes including the enveloping process based on Hilbert transform were performed to clarify the flux leakage signal due to the damage. The enveloped signals were then analyzed for objective damage detection by comparing with the threshold value. For improvement of quantitative analysis, three types of new damage indexes that utilize the relationship between the enveloped magnetic flux leakage signal and the threshold value were additionally proposed. By using the proposed damage indexes and the general damage indexes for the magnetic flux leakage method, the detected magnetic flux leakage signals from each damage type were quantified. The trends of the extracted damage indexes according to damage levels were analyzed to examine the applicability and reliability of the proposed damage indexes for the magnetic flux leakage based wire rope inspection.

scholarly journals Research on the Method of Predicting Corrosion width of Cables Based on the Spontaneous Magnetic Flux Leakage

Materials ◽  
2019 ◽  
Vol 12 (13) ◽  
pp. 2154 ◽  
Author(s):  
Yinghao Qu ◽  
Hong Zhang ◽  
Ruiqiang Zhao ◽  
Leng Liao ◽  
Yi Zhou
Keyword(s):  
Magnetic Flux ◽  
Safety Assessment ◽  
Steel Wire ◽  
Safety Performance ◽  
Magnetic Flux Leakage ◽  
Detection Accuracy ◽  
Lift Off ◽  
Point Distance ◽  
Flux Component ◽  
Flux Leakage

The detection of cable corrosion is of great significance to the evaluation of cable safety performance. Based on the principle of spontaneous magnetic flux leakage (SMFL), a new method for predicting the corrosion width of cables is proposed. In this paper, in order to quantify the width of corrosion, the parameter about intersecting point distance between curves of magnetic flux component of x direction at different lift off heights (Dx) is proposed by establishing the theoretical model of the magnetic dipole of the rectangular corrosion defect. The MATLAB software was used to analyze the influencing factors of Dx. The results indicate that there exists an obvious linear relationship between the Dx and the y (lift off height), and the Dx–y curves converge to near the true corrosion width when y = 0. The 1/4 and 3/4 quantiles of the Dx–y image were used for linear fitting, which the intercept of the fitting equation was used to represent the predicted corrosion width. After the experimental study on the corrosion width detection for the parallel steel wire and steel strand, it is found that this method can effectively improve the detection accuracy, which plays an important role in cable safety assessment.

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