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Metal pipeline defect positioning detecting device and method based on magnetic collecting surface scanning

A technology for positioning detection devices and metal pipes, which is applied in the direction of optical testing for flaws/defects, material magnetic variables, etc. It can solve the problems of short service life of device sensors, low spatial resolution, and insufficient safety, and achieve anti-electromagnetic interference capabilities Strong, improved vertical spatial resolution, high sensitivity

Pending Publication Date: 2019-06-04
四川莱威盛世科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] In order to solve the above technical problems, the present invention provides a defect detection method and device for metal pipelines for oil and gas transportation based on the magneto-optical rotation effect, so as to solve the problem of short service life of sensors in existing devices, low spatial resolution, insufficient safety, and narrow application range And other issues

Method used

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  • Metal pipeline defect positioning detecting device and method based on magnetic collecting surface scanning
  • Metal pipeline defect positioning detecting device and method based on magnetic collecting surface scanning
  • Metal pipeline defect positioning detecting device and method based on magnetic collecting surface scanning

Examples

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Embodiment 1

[0047] The present embodiment provides a kind of 1. metal pipeline defect localization detection device based on magnetic collecting surface scanning, such as figure 1 As shown, the device includes:

[0048] Permanent magnet 2, optical fiber magnetic sensitive probe array 3, signal connecting optical cable 5, sensing light source module 7 and photoelectric conversion module 8; the light source output by sensing light source module 7 is transmitted to optical fiber magnetic sensitive probe array 3 through signal connecting optical cable 5, optical fiber The return light output by the magnetic sensitive probe array 3 is transmitted to the photoelectric conversion module 8 through the signal connection optical cable 5;

[0049]The permanent magnet 2 includes at least one first permanent magnet 21 and a second permanent magnet 22. The two ends of the two permanent magnets 2 are placed oppositely with the same polarity. By adjusting the magnetic field strength and the spacing dista...

Embodiment 2

[0062] This embodiment has the same inventive concept as Embodiment 1, and provides a metal pipeline defect location detection method based on magnetic collecting surface scanning. The method includes an optical data collection step and a defect detection step.

[0063] Further, the optical data collection step includes the following steps:

[0064] S01: At least one first permanent magnet 21 and second permanent magnet 22 included in the permanent magnet 2 are placed oppositely with the same polarity to form a magnetic collecting surface, and the metal pipeline 4 to be tested is scanned with the magnetic collecting surface;

[0065] S02: The optical fiber magnetic sensitive probe array 3 located between the first permanent magnet 21 and the second permanent magnet 22 receives the input light, and the input light passes through the optical fiber collimator 31, polarizer 32, magneto-optic crystal 33, analyzer and The return light is output after the reflector;

[0066] Further...

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Abstract

The invention discloses a metal pipeline defect positioning detecting device and method based on magnetic collecting surface scanning, which belongs to the technical field of pipeline non-destructivedetecting. The device comprises a permanent magnet, a fiber magnetic sensitive probe array, a signal connecting optical cable, a fiber coupling module, a sensing light source module, a photoelectric conversion module, a three-dimensional spatial positioning module and a signal processing module. The method comprises the steps that magnetic collecting surface scanning is carried out on a metal pipeline to be detected; the magnitude of returned optical power is measured; and if the magnitude of the returned optical power changes, the metal pipeline to be detected has a defect, and otherwise themetal pipeline to be detected has no defects. The device provided by the invention has the characteristics of high safety, wide application range, high sensitivity and high spatial resolution.

Description

technical field [0001] The invention relates to the technical field of pipeline non-destructive testing, in particular to a defect detection and defect location device and method for metal pipelines for oil and gas transportation based on magnetic collecting surface scanning. Background technique [0002] Pipeline is one of the most economical, safest and most effective ways to transport oil, natural gas and refined oil, and is widely used in the transportation of crude oil, refined oil and natural gas. Pipeline transportation has become the lifeblood of my country's national economy, and it is growing at a high rate every year. However, with the increase of pipelines and the increase of pipe age, frequent perforation and leakage accidents caused by corrosion damage of pipelines have not only brought Huge economic losses will also seriously pollute the environment and destroy ecology, and even fires and explosions will threaten people's lives. Therefore, it is necessary to u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/82G01N21/88
Inventor 张一川江海鹏李白
Owner 四川莱威盛世科技有限公司
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