Quantitative defect detection method and device for moving metal components

Abstract

The invention discloses a quantitative defect detection method and device for moving metal components. The quantitative defect detection method includes the steps that a constant magnetic field is generated by a fixed detection probe; the position of a magnetic sensor is set and magnetic induction intensity signals are collected, and the magnetic induction intensity signals are subjected to amplifying and filtering processing; the peak value of a response signal and the baseline value are subjected to difference processing to obtain the difference peak value; and an inversion model of moving metal component defect parameters is constructed and the defect parameters are calculated. The device includes an excitation signal generating module, a signal amplification and filtering module, a data acquisition and processing module and a defect parameter calculating module. According to the quantitative defect detection method and device for the moving metal components, the quantitative detection of defects in the moving metal components is realized by using motional eddy currents generated by the relative movement between the detection device and the detected metal components, so that thequality monitoring ability of metal parts is improved, the market competitiveness of the metal parts is improved, and thus huge economic and social benefits are brought.

Description

technical field [0001] The invention belongs to the technical field of defect detection of metal components, and in particular relates to a defect quantitative detection method and device of a moving metal component. Background technique [0002] Non-destructive testing (NDT, Nondestructive Testing) technology refers to the internal and surface structure, nature, state and Effective detection of physical properties such as defects. As a branch of nondestructive testing, electromagnetic nondestructive testing technology detects defects in materials through changes in the electromagnetic properties of materials, making this testing method widely used in transportation such as aircraft fuselage structures, steam pipelines, and oil and natural gas. Production quality monitoring and online health status detection of metal components such as pipelines and railway rails. Electromagnetic nondestructive testing methods mainly include: eddy current testing, magnetic flux leakage tes...

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is: in order to solve the problem that existing defect detection methods for moving metal components have blind spots for surface and sub-surface cracks, cannot realize quantitative defect identification or can realize quantitative defect identification, but the detection speed is limited, etc. The invention proposes a defect quantitative detection method and device of a moving metal component, which effectively improves the sensitivity and signal strength of the defect detection of the moving metal component, and realizes the rapid quantitative identification of the defect of the moving metal component

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