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Dynamic magnetic detection system and method and electromagnetic array method

A technology of magnetic detection and magnetic flux leakage detection, which is applied in the field of electronic information, can solve the problems of poor detection accuracy and achieve the effect of small precision

Active Publication Date: 2019-03-19
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Magnetic flux leakage testing can only detect large-scale defects such as corrosion, but the detection accuracy of small-scale defects such as cracks is very poor

Method used

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  • Dynamic magnetic detection system and method and electromagnetic array method
  • Dynamic magnetic detection system and method and electromagnetic array method
  • Dynamic magnetic detection system and method and electromagnetic array method

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Embodiment Construction

[0046] In order to make the object, technical solution and advantages of the present invention clearer, the technical solution of 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 technical solution of the present invention, and are not intended to limit the technical solution of the present invention.

[0047] see figure 1 , a magnetic field detection system 10 provided by an embodiment of the present invention includes: a magnetic field application device 100 , a moving magnetic excitation device 200 and a magnetic field detection device 300 . The magnetic field applying device 100 is used for applying a magnetic field to a ferromagnetic object 900 to be tested. The moving magnetic excitation device 200 is used to generate a transient excitation magnetic field. The magnetic field detection device 300 ...

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Abstract

The invention provides a dynamic magnetic detection system and method and an electromagnetic array method. The system comprises a magnetic field applying device, a dynamic magnetic excitation device and a magnetic field detection device, the magnetic field applying device is used for applying a magnetic field to a to-be-detected object with ferromagnetism, the dynamic magnetic excitation device isused for generating a transient excitation magnetic field, and the magnetic field detection device is used for detecting induced magnetic signals around the to-be-detected object. The dynamic magnetic detection system and method can detect small-size defects, is high in accuracy and can maintain stable detection performance during high-speed moving.

Description

technical field [0001] The invention relates to the technical field of electronic information, in particular to a dynamic magnetic detection system, a detection method and an electromagnetic array control method. Background technique [0002] The industrialization and practical application of oil and gas pipeline defect detection technology and equipment is of great significance. [0003] Magnetic flux leakage detection is an internal detection technology for pipeline defects that has been formed at home and abroad. The magnetic flux leakage detection technology is based on the constant magnetic field provided by the permanent magnet to magnetize the detection area of ​​the pipe wall. The magnetic field leakage signal generated by the pipe wall defect is measured by the Hall sensor and other magnetic field sensing elements, and the pipeline defect information is identified according to the characteristics of the magnetic flux leakage signal. [0004] Magnetic flux leakage t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/83
CPCG01N27/83F17D5/02G01N27/82
Inventor 郭静波朴冠宇胡铁华
Owner TSINGHUA UNIV