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AC Electromagnetic Field Detection Probe for In-Pipeline Inspection

A technology of alternating electromagnetic fields and detection probes, applied in the direction of material magnetic variables, can solve problems such as safety accidents, achieve the effects of prolonging service life, high detection accuracy, and wide application range

Active Publication Date: 2019-06-11
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional AC electromagnetic field detection probe is only suitable for detecting defects on the outer surface of the component, and can detect the outer surface of the pipeline. In actual situations, defects on the inner surface of the pipeline often appear. If the number of defects in the pipeline cannot be accurately judged and shape, may cause serious safety accidents

Method used

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  • AC Electromagnetic Field Detection Probe for In-Pipeline Inspection
  • AC Electromagnetic Field Detection Probe for In-Pipeline Inspection
  • AC Electromagnetic Field Detection Probe for In-Pipeline Inspection

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Embodiment Construction

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0037] Such as Figure 1 to Figure 9 As shown, the present invention provides an AC electromagnetic field detection probe for detection in pipelines, which includes: a cylinder 1 with a hollow passage 12; a coil mechanism 2, which is ringed outside the cylinder 1, and the coil The mechanism 2 is composed of a plurality of coil units 3 , which are evenly arranged along the circumferential direction of the cylinder 1 , and a plurality of sensors 7 are arranged o...

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Abstract

The invention provides an alternating-current magnetic field detection probe applied to inner detection of pipelines. The alternating-current magnetic field detection probe comprises a cylinder and a coil mechanism, wherein the cylinder is provided with a hollow channel; the coil mechanism is annularly arranged outside the cylinder; the coil mechanism is composed of a plurality of coil units; the coil units are uniformly arranged along the circumferential direction of the cylinder; a plurality of sensors are arranged on the outer wall of each coil unit. The alternating-current magnetic field detection probe is capable of detecting the inner walls of the pipelines, and is simple in structure, convenient to operate, high in detection accuracy, long in service life and wide in application range.

Description

technical field [0001] The invention relates to a non-destructive testing device, in particular to a probe for in-pipeline detection, in particular to an AC electromagnetic field detection probe for in-pipeline detection. Background technique [0002] AC electromagnetic field testing is a non-destructive testing technology that has emerged in recent years and is mainly used to detect cracks or defects on the surface of magnetically permeable materials. The working principle of AC electromagnetic field detection follows the principle of electromagnetic induction. An alternating magnetic field is induced on the surface of the component to be tested. Defects such as cracks on the surface of the component will affect the distribution of the magnetic field and cause distortion of the magnetic field distribution. Measure the magnetic field distortion signal to obtain defect information . [0003] At present, with the continuous improvement of safety awareness and testing requirem...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/82
CPCG01N27/82
Inventor 郑文培冯一璟张来斌
Owner CHINA UNIV OF PETROLEUM (BEIJING)