Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Ferromagnetic pipeline tiny defect magnetic detection sensor

A sensor and magnetic detection technology, which is applied in the direction of material magnetic variables, can solve the problems of small permanent magnets to reduce the magnetization magnetic field strength, reduce the amount of information of the detection sensor, and low detection accuracy, so as to optimize the magnetization effect, strengthen the detection effect and sensitivity, high precision effect

Inactive Publication Date: 2020-02-11
BEIHANG UNIV
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

First of all, the small permanent magnet reduces the intensity of the magnetizing magnetic field, which can only ensure the inner wall of the magnetized pipeline, thereby reducing the amount of information acquired by the detection sensor; secondly, the magnetic field detection part only uses a single coil or Hall element, and the acquired signal The amount of information is less, and the detection accuracy is lower

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Ferromagnetic pipeline tiny defect magnetic detection sensor
  • Ferromagnetic pipeline tiny defect magnetic detection sensor
  • Ferromagnetic pipeline tiny defect magnetic detection sensor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0029] The present invention will be further described below in conjunction with the accompanying drawings and examples. It should be understood that the following examples are intended to facilitate the understanding of the present invention, and have no limiting effect on it. For convenience of description, the present invention will be described below by taking an oil stealing hole as an example. It should be understood that the present invention can also be applied to defect detection of non-pipe ferromagnetic materials.

[0030] Such as figure 1 As shown, the ferromagnetic pipeline micro-defect magnetic detection sensor of the present invention is in the shape of a cuboid as a whole and its lower surface is in an arc consistent with the curvature of the pipeline wall, so as to better approach or even fit the pipeline wall during the detection process. It should be understood that it can The invention detects the radian of the lower surface of the sensor according to the ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a ferromagnetic pipeline tiny defect magnetic detection sensor. The detection sensor is integrally cuboid, and the lower surface of the detection sensor is in an arc shape consistent with the radian of the wall of a pipeline. The magnetic detection sensor comprises an arched excitation part, a circuit part and a detection part, the circuit part and the detection part are arranged in the arched cavity of the arched excitation part, and the circuit part is arranged between the arched excitation part and the detection part. According to the invention, an excitation devicewith a large volume in a traditional magnetic flux leakage detection device is simplified into the excitation part of the sensor, the integration of the excitation part and the detection part is achieved, and the implementation mode of the detection part is designed, so that the acquired magnetic field signal information amount is larger and more accurate.

Description

technical field [0001] The invention belongs to the field of detection in pipelines and the technical field of magnetic detection, and in particular relates to a magnetic detection sensor for micro-defects in ferromagnetic pipelines. Background technique [0002] Magnetic flux leakage detection technology is the longest research time, the most widely used and the most mature in-pipeline detection technology. This technology is suitable for the identification and quantification of metal pipeline surface and internal defects. It is easy to operate, high in reliability, and has no special requirements for the detection environment. . [0003] Magnetic flux leakage detection technology is based on the high permeability of ferromagnetic materials. After the ferromagnetic tube wall is magnetized by a magnetizing device, if the material of the tube wall is continuous and uniform, the magnetic field lines will be bound in the tube wall, and it can be considered that there is almost...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/83
CPCG01N27/83
Inventor 郑德智刘晓林王帅
Owner BEIHANG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com