Profiling flexible array eddy current probe and detection method

Abstract

The invention discloses a profiling flexible array eddy current probe and a detection method. The function of detecting the surface of a whole curved surface workpiece by using a static probe is realized through profiling designed array coils, a coil special arrangement mode and an electronic scanning mode. The flexible array eddy current probe has the beneficial effects that the detection efficiency is improved, interference is suppressed, the flexible array eddy current probe is formed by arranging the multiple coils in a surrounding mode according to the shape of a workpiece, and the edge effect influence is effectively eliminated; a flexible material is used in cooperation, the probe is embedded into a base structure matched with a three-dimensional model of the workpiece, the probe isattached to the surface of the workpiece, and interference caused by different distances between the probe and the surface of the workpiece is reduced more effectively; a multi-channel scanning circuit is adopted for circuit setting, data of each position of a covered workpiece are rapidly collected, and meanwhile a C scanning display mode is adopted; the scanning sequence is from outside to inside in a spiral mode, the edge of the workpiece is preferentially detected, and influence of the edge effect is effectively restrained through the self-induction differential coil.

Description

technical field [0001] The invention relates to the technical field of nondestructive testing, in particular to a profiling flexible array eddy current probe and a testing method for eddy current testing of curved surface workpieces. Background technique [0002] There are many metal workpieces with complex shapes and curved surfaces that need to be inspected for surface and near-surface defects, such as small-diameter pipes, engine turbine blades, and aircraft hubs. For such workpieces, conventional non-destructive testing methods include penetrant testing, magnetic particle testing and eddy current testing. Cleaning is required before and after penetrant testing. When the surface coating of the workpiece to be inspected needs to be scraped off, the inspection cost is high and it is not suitable for in-service inspection; magnetic particle inspection is only suitable for ferromagnetic materials, and must be demagnetized and cleaned after the inspection is completed. , duri...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of large detection signal interference, large detection blind area and low detection efficiency due to the influence of lift-off effect and edge effect when conventional eddy current detection technology detects curved surface workpieces, and provides a profiling flexible The array eddy current probe and detection method realize the function of detecting the entire surface of the curved workpiece with a static probe through the profiling-designed array coil, the special arrangement of the coil and the electronic scanning method

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