A method and device for improving eddy current detection rate

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By sequentially detecting multiple moving detection coils and image matching superimposed electromagnetic signals, the problem of slow detection speed in far-field eddy current detection technology is solved, and the effect of increasing the detection rate without reducing sensitivity is achieved.

CN113866262BActive Publication Date: 2025-03-21EDDYSUN (XIAMEN) ELECTRONICS CO LTD

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Patent Information

Application Number: CN202111167089.7
Authority / Receiving Office: CN · China
Patent Type: Patents(China)
Current Assignee / Owner
Filing Date: 2021-10-02
Publication Date: 2025-03-21
Estimated Expiration: 2041-10-02

Application Information

Patent Timeline

02 Oct 2021

Application

CN202111167089.7

21 Mar 2025

Publication

CN113866262B

IPC: G01N27/90; G01N27/904

CPC: G01N27/904; G01N27/9046; G01N27/9006

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Application Domain

Material magnetic variables

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AI Technical Summary

Technical Problem

The existing far-field eddy current detection technology is slow when detecting small-diameter metal pipes, and increasing the detection rate will affect the detection sensitivity.

Method used

The electromagnetic detection signals at the same position are sequentially detected by multiple moving detection coils, and image matching and superimposing are performed to form a new complete signal to improve the detection speed.

Benefits of technology

Without affecting the detection sensitivity, the eddy current detection rate is significantly improved and the working efficiency is improved.

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Abstract

The present invention discloses a method and device for improving eddy current detection rate, which is used for in-service electromagnetic eddy current detection of metal pipes and rods 1. The detection device 2 comprises an excitation coil (21) and one or more detection coils (22), which are characterized in that the one or more detection coils (21) are arranged on the same straight line in the moving direction of electromagnetic eddy current mobile detection. During electromagnetic eddy current mobile detection, the detection coils arranged on the same straight line detect the same position of the object being detected, selectively match and superimpose the effective detection data of multiple detection coils, and form new electromagnetic detection data. The present invention can increase the detection speed and improve the work efficiency without affecting the detection sensitivity.

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