Device and method for detecting defects of inner and outer walls of pipeline based on three-axis magnetic flux leakage and eddy current

A defect detection and eddy current technology, applied in the direction of material magnetic variables, etc., can solve the problems of obvious recognition of near-surface defects and weak identification of internal and external defects, and achieve good detection quality, easy operation, and power saving effects

Active Publication Date: 2012-11-28
NORTHEASTERN UNIV
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Problems solved by technology

[0002] The magnetic flux leakage detection method is a non-destructive testing technology with a high degree of automation. It is widely used in the quality inspection and safety monitoring of ferromagnetic materials. It has a very good detection effect on the identification of surface defects, but it has little effect on the identification of internal and external defect

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  • Device and method for detecting defects of inner and outer walls of pipeline based on three-axis magnetic flux leakage and eddy current
  • Device and method for detecting defects of inner and outer walls of pipeline based on three-axis magnetic flux leakage and eddy current
  • Device and method for detecting defects of inner and outer walls of pipeline based on three-axis magnetic flux leakage and eddy current

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Embodiment Construction

[0026] Embodiments of the invention will be further described below in conjunction with the accompanying drawings.

[0027] The device for detecting inner and outer wall defects of pipelines based on three-axis magnetic flux leakage and eddy current adopted in this embodiment has a structure as follows: figure 1 shown. It includes at least three mileage wheels 1-1, a magnetic flux leakage detector 1-2, an eddy current detector 1-3, a data processing and memory 1-4 and a power supply 1-5. The above devices can be packaged in such figure 1 In the structure shown, wherein, the data processing and memory 1-4 is located at the center of the packaging shell, ensuring the balance of the device and the safety of core components; the magnetic flux leakage detector 1-2 is located at the center of the data processing and memory 1-4 On the left side, the eddy current detector 1-3 is located on the right side of the data processing and memory 1-4, and the distance between the magnetic fl...

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Abstract

The invention relates to a device and a method for detecting defects of inner and outer walls of a pipeline based on three-axis magnetic flux leakage and eddy current, and belongs to the technical field of non-destructive testing. The device comprises a magnetic flux leakage detector, a data processing and storing device, a power supply, at least three odometer wheels and an eddy current detector, wherein the eddy current detector consists of an eddy current sensor and is a device used for detecting the defects on inner and outer surfaces of the pipeline. According to the device provided by the invention, a magnetic flux leakage detection method and an eddy current detection method are combined by using different characteristics of the magnetic flux leakage detection method and the eddy current detection method, so that the function of distinguishing the defect of the inner wall from the defects of the outer wall is realized; and in addition, the method provided by the invention is favorable in detection quality and simple in operation and can be widely applied to non-destructive detection of oil transmission pipelines in the industrial fields of petroleum, petrifaction and the like.

Description

technical field [0001] The invention belongs to the technical field of non-destructive testing, in particular to a device and method for detecting inner and outer wall defects of pipelines based on three-axis magnetic flux leakage and eddy current. Background technique [0002] The magnetic flux leakage detection method is a non-destructive testing technology with a high degree of automation. It is widely used in the quality inspection and safety monitoring of ferromagnetic materials. It has a very good detection effect on the identification of surface defects, but it has little effect on the identification of internal and external defects. , The eddy current testing method is also one of the commonly used non-destructive testing techniques. Using the principle of eddy current, the identification effect of near-surface defects is obvious. The above two methods have their own advantages and disadvantages, and neither can complete the distinction and identification of internal...

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Application Information

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IPC IPC(8): G01N27/83G01N27/90
Inventor 张化光刘金海冯健马大中汪刚杨守超谭亮
Owner NORTHEASTERN UNIV
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