Inward passing-type colossal magnetoresistance array probe for nonferromagnetic thin-walled tube defect detection

A defect detection, non-ferromagnetic technology, applied in the direction of measuring devices, material magnetic variables, material analysis through electromagnetic means, etc., can solve the problems of weak anti-interference ability, low detection sensitivity of small defects, high scrap rate, etc., to improve The effect of detecting sensitivity, improving anti-interference ability and prolonging the service life

Inactive Publication Date: 2016-07-27
CHINA NUCLEAR POWER OPERATION TECH +1
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide an inner-penetrating giant magnetoresistive array probe for defect detection of non-ferromagnetic thin-walled tubes, which solves the problems of high scrap rate of existing eddy current array probes, low detection sensitivity of tiny defects, and weak anti-interference ability

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  • Inward passing-type colossal magnetoresistance array probe for nonferromagnetic thin-walled tube defect detection
  • Inward passing-type colossal magnetoresistance array probe for nonferromagnetic thin-walled tube defect detection

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Embodiment Construction

[0014] The present invention will be further described in detail below in conjunction with the drawings and specific embodiments.

[0015] Such as figure 1 , figure 2 As shown, an internally penetrating giant magnetoresistive array probe for detecting defects in non-ferromagnetic thin-walled tubes includes an excitation coil 1 and a giant magnetoresistive sensor 2 arranged on a probe frame 3, wherein the probe frame 3 is arranged around the circumference A number of excitation coils 1 are installed in each direction, and a giant magnetoresistive sensor 2 is installed in the central area of ​​each excitation coil 1. Among them, the excitation coil 1 adopts a flat flat hollow coil; for example, the probe frame 3 is evenly arranged in the circumferential direction. 4 to N (N≥4) flat hollow coils are arranged, and a giant magnetoresistive sensor is installed at the center of each flat hollow coil.

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Abstract

The invention relates to the technical field of inward passing-type eddy current nondestructive tests and discloses an inward passing-type colossal magnetoresistance array probe for nonferromagnetic thin-walled tube defect detection. The probe comprises an exciting coil and a colossal magnetoresistance sensor, the exciting coil and the colossal magnetoresistance sensor are arranged in a probe framework and the colossal magnetoresistance sensor is located in the center of the exciting coil. The probe is used for thin-walled tube eddy current detection, improves nonferromagnetic small-caliber pipe defect detection sensitivity of the array probe, widens a defect size detection range of the probe, improves an anti-interference capability of the array probe and prolongs a probe use period.

Description

Technical field [0001] The invention belongs to the technical field of in-penetrating eddy current nondestructive testing, and in particular relates to an in-penetrating giant magnetoresistive array probe for defect detection of non-ferromagnetic thin-walled tubes. Background technique [0002] In the nuclear power plant system, there are a large number of heat exchangers. In the process of manufacturing and operation, due to differences in structure, heat transfer tube materials, pipe fitting specifications, and operating conditions, various types of defects often occur. Eddy current testing is the most widely used nondestructive testing method in the inspection of heat transfer tubes of in-service heat exchangers in nuclear power plants. Traditionally, the internal thread-wound coil (Bobbin) probe is used for detection, which has high sensitivity to the defects of the inner and outer walls, and can find the defects timely and accurately. However, for the support plate and tube...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/90G01N27/904
Inventor 祁攀邵文斌崔洪岩廖述圣
Owner CHINA NUCLEAR POWER OPERATION TECH
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