Unlock instant, AI-driven research and patent intelligence for your innovation.

Pulsed eddy current detection hardware separation method based on rectangular probe

A rectangular probe, pulsed eddy current technology, applied in the direction of material magnetic variables, etc., can solve problems such as limiting the development of detection technology, and achieve the best detection effect

Active Publication Date: 2015-11-18
JIANGNAN UNIV
View PDF4 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The detection methods for pipelines generally include ray, ultrasonic, magnetic flux leakage and eddy current detection technologies; however, ultrasonic requires couplant, ray requires radioactive sources, and magnetic saturation devices are required for magnetic flux leakage detection, which limit the detection to some extent. Technology Development in Pipeline Inspection

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
  • Pulsed eddy current detection hardware separation method based on rectangular probe
  • Pulsed eddy current detection hardware separation method based on rectangular probe
  • Pulsed eddy current detection hardware separation method based on rectangular probe

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0024] First, build the figure 1 The experimental platform is shown. Adjust the appropriate voltage of the DC power supply and input it to the square wave generating circuit to generate a square wave with adjustable frequency. The weak signal is amplified through the power amplifier, and the amplified signal enters the excitation coil wound on the rectangular differential probe, and the excitation coil itself A primary magnetic field will be generated; when the rectangular differential probe (2) is placed horizontally on the test piece (1), the secondary magnetic field generated by the eddy current inside the test piece is coupled with the primary magnetic field. When a defect (3) is encountered, the eddy current density and The distribution changes, and then the coupled magnetic field is disturbed, and this change is detected by the Hall s...

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 provides a rectangular probe-based pulsed eddy current detection hardware separation method capable of effectively separating an eddy current signal and a magnetic leakage signal. The method is superior especially in detection of ferromagnetic materials. According to the method, the structural design of a probe and arrangement of sensors are improved, and eddy current and magnetic leakage signals in a ferromagnetic material are effectively separated mainly through arrangement of different aspect sensors and shielding cases; thus, a detection signal can reflect more defect information, and the advantage of wide frequency spectrum of pulsed eddy current is given to full play. A system used in the method mainly comprises a signal generation module, an exciting coil module, a sensor module, a signal processing module, a signal acquisition module, etc.

Description

technical field [0001] The invention mainly studies the signal separation by improving the structure of the probe and the sensor, so it relates to the technical field of non-destructive testing and testing. Background technique [0002] With the rapid development of world industry, pipelines have been widely used in various fields such as petrochemical industry, coal mining industry and ocean engineering, and have become an indispensable part of modern industry. However, as the service time of the pipeline becomes longer and longer, the pipeline will have certain safety hazards, and the main factors are corrosion and wear of the pipeline. Therefore, detecting the corrosion and wear of the pipeline and evaluating the reliability and service life of the pipeline system are one of the important means to avoid pipeline accidents. The detection methods for pipelines generally include ray, ultrasonic, magnetic flux leakage and eddy current detection technologies; however, ultraso...

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
IPC IPC(8): G01N27/90
Inventor 周德强王俊潘萌赵健杜阳
Owner JIANGNAN UNIV
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com