Magnetic permitivity meter for magnetic flux leakage detection

A magnetic permeability meter and magnetic flux leakage detection technology, which is applied in the direction of the size/direction of the magnetic field and the magnetic variable of materials, can solve the problems of large errors in magnetic flux leakage detection and achieve the effect of improving quantitative accuracy

Inactive Publication Date: 2019-01-04
TOMATO TECH WUHAN
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Problems solved by technology

[0005] In view of the above problems, the object of the present invention is to provide a magnetic permeability meter for magnetic flux leakage detection, aiming at solving the technical problem of large error in existing magnetic flux leakage detection

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  • Magnetic permitivity meter for magnetic flux leakage detection
  • Magnetic permitivity meter for magnetic flux leakage detection
  • Magnetic permitivity meter for magnetic flux leakage detection

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[0019] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0020] In order to illustrate the technical solutions of the present invention, specific examples are used below to illustrate.

[0021] The magnetic permeability of ferromagnetic materials is a main magnetic performance parameter and also a key parameter in magnetic flux leakage detection. But in practice, this parameter is not directly tested. The general practice is to deal with it by assuming the use of comparative samples with similar magnetic properties. In fact, this requirement cannot be fully met, because the comparison samples are limited, and the magnetic permeability of the object to ...

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Abstract

The invention is applicable to the field of non-destructive testing, and provides a magnetic permitivity meter for magnetic flux leakage detection. The meter is internally provided with an excitationunit, and one or more magnetic sensors are disposed under the excitation unit. The magnetic sensors can measure the magnetic permitivity of a comparison template or an object to be inspected for laterquantitative evaluation of defects, and the scheme takes the magnetic property difference of the comparison template or the object to be inspected into consideration, is adapted to more objects to beinspected, and improves the quantitative accuracy of the defects.

Description

technical field [0001] The invention belongs to the field of non-destructive testing, in particular to a magnetic permeability meter for magnetic flux leakage testing. Background technique [0002] The principle of magnetic flux leakage detection (Magnetic Flux Leakage, MFL) is relatively clear, mainly using the conduction principle of magnetic flux in the object to be inspected. When the object to be inspected contains defects such as corrosion pits, bubbles, or cracks, the magnetic flux distribution at the defect is different because the magnetic permeability of these defects is different from that of the base material of the object to be inspected. In general, defects cause a magnetic flux leakage on the surface of the object to be inspected, the so-called magnetic flux leakage. Through the detection of this leaked magnetic flux, it is possible to quantitatively calculate the defect dimension in the object to be inspected, including the depth and the like. [0003] Befo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/83G01R33/02
CPCG01N27/83G01R33/02
Inventor 卢永雄阮鸥黄威王康陆智明
Owner TOMATO TECH WUHAN
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