A method and device for quantitative detection of defects in moving metal components

Abstract

The invention discloses a defect quantitative detection method and device of a moving metal component. The method includes fixing a detection probe to generate a constant magnetic field, setting the position of a magnetic sensor and collecting a magnetic induction intensity signal, performing amplification and filtering processing on the magnetic induction intensity signal, and converting the response signal The peak value and the baseline value are differentially processed to obtain the differential peak value, and the inversion model of the defect parameter of the moving metal component is constructed to calculate the defect parameter; the device includes an excitation signal generation module, a signal amplification and filtering module, a data acquisition and processing module and a defect parameter calculation module . The invention realizes quantitative detection of defects in moving metal components by using the moving eddy current generated by the relative motion between the detection device and the metal component to be tested, improves the ability to monitor the quality of metal parts, and improves the market competitiveness of such metal parts, thereby bringing to huge economic and social benefits.

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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