The Broken Wires Identification of Wire Rope Based on Multilevel Filtering Method Using EEMD and Wavelet Analysis
- PDF / 1,796,365 Bytes
- 10 Pages / 595.276 x 790.866 pts Page_size
- 92 Downloads / 157 Views
TECHNICAL ARTICLE—PEER-REVIEWED
The Broken Wires Identification of Wire Rope Based on Multilevel Filtering Method Using EEMD and Wavelet Analysis Fuchang Peng . Juwei Zhang
Submitted: 18 October 2020 / Accepted: 21 October 2020 Ó ASM International 2020
Abstract In view of the shortcomings of current wire rope magnetic flux leakage (MFL) detection devices such as large size and low sensitivity, as well as the poor noise reduction effect of MFL data and the low recognition rate of defects, this paper designs a wire rope three-dimensional MFL detection device based on unsaturated magnetic excitation (UME) and proposes a multilevel filtering algorithm. Six types of small gap broken wire defects can be effectively detected by the three-dimensional tunnel magnetoresistive sensor array. The multilevel filtering method based on EEMD and optimal wavelet is applied to three-dimensional UME signal processing, effectively suppressing noise interference. And color processing technology is applied to enhance the characterization of the defect images. A support vector machine recognition network based on the color moment feature vector as input is designed to classify broken wire defects, and the quantitative recognition rate of 98.572% is achieved when the limit error is 0.901%. The experimental results show that the detection device has the advantages of high sensitivity and simple structure and can collect MFL information in three directions, and the filtering algorithm effectively improves the signal-to-noise ratio and can realize the preliminary quantification of broken wire defects.
F. Peng J. Zhang (&) Electrical Engineering College, Henan University of Science and Technology, Luoyang 471023, China e-mail: [email protected]; [email protected] F. Peng J. Zhang Power Electronics Device and System Engineering Laboratory of Henan, Henan University of Science and Technology, Luoyang 471023, China
Keywords Broken wires EEMD Magnetic flux leakage Unsaturated magnetic excitation Wire rope
Introduction Wire rope is the indispensable component of the load capacity of traction system in the fields of mining, tourist cable cars and elevators. Due to the long work and frequent use, the broken wires will appear in the stress concentration area. Therefore, it is very vital to carry out the nondestructive test for the wire rope [1]. The nondestructive testing methods for wire rope that have been proposed so far mainly include MFL testing, ultrasonic testing, infrared imaging testing, ray testing and eddy current testing [2, 3]. Due to its simple principle and low cost, the MFL testing technology is more suitable for testing defects of wire rope with good magnetic permeability, so it has developed rapidly and is currently the mainstream nondestructive testing method for wire rope. MFL detection method is divided into three steps, including magnetization of ferromagnetic materials, MFL signal acquisition and MFL data processing. The magnetizer plays an important role in MFL detection and affects the MFL s
Data Loading...
