Method and system for identifying wire fracture damage of steel wire rope

Abstract

The invention discloses a method for identifying wire fracture damage of a steel wire rope based on wavelet transformation and a neural network, and belongs to the field of civil engineering structuredetection. The method comprises the following steps: firstly, detecting a steel wire rope with an unknown number of fractured wires by using a steel wire rope detection instrument, extracting a detected leakage flux signal and recording the parameters such as the diameter of the steel wire rope and the operation speed of the steel wire rope detection instrument; then, carrying out continuous wavelet transformation on the extracted and detected leakage flux signal by using multi-resolution characteristics and singularity detection capacity of wavelet transformation, and recording a wavelet coefficient peak-to-peak value after transformation; then, guiding the characteristic values such as recorded peak-to-peak value and the diameter of the steel wire rope into the neural network which hasbeen trained; and finally, obtaining parameters output by the neural network so as to complete quantitative damage identification for the number of fractured wires of the steel wire rope. According tothe method, quantitative identification for the number of fractured wires of the steel wire rope is realized, and the method has relatively high practicability.

Description

technical field [0001] The invention belongs to the field of civil engineering structure detection, and relates to a method and system for identifying damage of broken steel wire ropes, and more specifically, to a method and system for identifying damage of broken steel wire ropes based on wavelet transform and neural network. Background technique [0002] As an engineering material or device, steel wire rope has been widely used in my country's infrastructure projects. With the rapid development of social production and construction, the production and demand of steel wire rope continue to grow, and its production efficiency and speed also increase rapidly. Wire ropes are affected by environmental corrosion, uncertain alternating loads, mechanical shocks, wear, etc. during operation, and damage such as broken wires may occur. [0003] The traditional nondestructive testing methods for steel wire ropes include magnetic particle testing (MPI), penetrant testing (PT), eddy cur...

AI Technical Summary

Problems solved by technology

However, the wire rope detector can only qualitatively analyze the broken wire damage of the wire rope, but cannot quantitatively analyze the number of broken wires in the wire rope

Moreover, the detection signal is easily affected by external noise and other factors, resulting in insignificant peak and peak values ​​of the signal.

[0005] It can be seen that most of the traditional nondestructive testing methods for steel wire ropes can only detect whether there are broken wires in the steel wire rope, but cannot accurately determine the number of broken wires.

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