Steel wire rope damage detection method and system based on three-dimensional magnetic flux leakage color imaging

Abstract

The invention discloses a steel wire rope damage detection method and system based on three-dimensional magnetic flux leakage color imaging. The steel wire rope damage detection system comprises a three-dimensional magnetic flux leakage field signal detection device and an excitation device. According to the steel wire rope damage detection method, a three-dimensional leakage magnetic field signalis sent to an upper computer after amplification, baseline raising and analog-to-digital conversion; and an upper computer end uses wavelet decomposition to perform noise reduction on the three-dimensional leakage magnetic field signals, then performs normalization processing on the three-dimensional leakage magnetic field signals, maps the three-dimensional leakage magnetic field signals to three color channels of red R, green G and blue B to obtain a color image about steel wire rope leakage magnetic field information, then improves the circumferential resolution of the image through an interpolation method, performs positioning and segmenting on a defect area image by using an edge detection method, and finally extracts a characteristic value of the defect area image as the input of aBP neural network classifier to quantitatively identify the defects of the steel wire rope. A color image obtained through fusion contains leakage magnetic field vector information, and the information content is richer than one-dimensional information, and the problem that the steel wire rope surface defect recognition rate is low due to the fact that magnetic flux leakage signals collected in asingle direction are incomplete is solved.

Description

technical field [0001] The invention belongs to the field of steel wire rope flaw detection, and in particular relates to a steel wire rope damage detection method and detection system based on three-dimensional magnetic flux leakage color imaging. Background technique [0002] Industrial production, tourism, coal mining, shipping, and daily lifting usually use wire ropes as traction, load-bearing and connecting components. Long-term heavy-duty use of steel wire ropes is prone to broken wires, loose wires, and wear and tear damage. Use in harsh environments will lead to corrosion and shrinkage of steel wire ropes, and a decrease in carrying capacity, which is prone to safety accidents and endangers personal safety and equipment safety. Therefore, it has important social and economic benefits to realize the rapid and non-destructive automatic detection technology of steel wire rope by monitoring the damage condition of steel wire rope in real time. [0003] At present, there...

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Problems solved by technology

[0005] In order to solve the problem of low recognition rate of steel wire rope surface defects caused by incomplete magnetic flux leakage signals collected in one direction, the present invention provides a wire rope damage detection method based on three-dimensional magnetic flux leakage color imaging Detection method and detection system

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