Multi-layer electromagnetic shielding pulse far-field eddy current detection sensor

A technology for detecting sensors and far-field eddy currents, which is applied in the direction of material analysis, instruments, and measuring devices by electromagnetic means. It can solve the problems of unfavorable movement of U-shaped structure devices, increase detection, and difficulties, so as to increase the shielding effect and improve the strength. , detect the effect of deep depth

Inactive Publication Date: 2019-01-25
四川沐迪圣科技有限公司
View PDF6 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, the U-shaped structure device is not conducive to movement. In addition, the existing devices that use magnetic shielding to generate far-field eddy current sig

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
  • Multi-layer electromagnetic shielding pulse far-field eddy current detection sensor
  • Multi-layer electromagnetic shielding pulse far-field eddy current detection sensor
  • Multi-layer electromagnetic shielding pulse far-field eddy current detection sensor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0034] In order to better illustrate the technical effect of the present invention, a separate excitation coil sensor without a shielding structure is used for comparison with a multi-layer electromagnetic shielding pulse far-field eddy current detection sensor with a three-layer shielding structure of the present invention. Figure 4 It is the actual picture of the multi-layer electromagnetic shielding pulse far-field eddy current detection sensor in this embodiment. Such as Figure 4 As shown, the parameters of each component of the multi-layer electromagnetic shielding pulse far-field eddy current detection sensor in this embodiment are as follows:

[0035] The excitation coil 1 is made of copper enameled wire, the wire gauge is 30, the number of turns is 400 turns, and the inner diameter is d 11 = 12mm, outer diameter d 12 = 16mm, height h 1 = 10 mm. A separate excitation coil sensor without shielding structure has the same parameters as excitation coil 1.

[0036] Th...

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

PropertyMeasurementUnit
The inside diameter ofaaaaaaaaaa
Outer diameteraaaaaaaaaa
Heightaaaaaaaaaa
Login to view more

Abstract

The invention discloses a multi-layer electromagnetic shielding pulse far-field eddy current detection sensor. Three layers of shielding layers made from high-magnetic-permeability high-conductivity materials are used between an excitation coil and a detection coil to serve as an isolation device for direct coupling energy, so that the direct coupling energy is bound in the shielding layers. Indirect coupling energy outside the shielding layers account for a main part. Far-field signals can be detected through the detection coil. The three-layer electromagnetic shielding device is used, and afar-field eddy current phenomenon is generated in a ferromagnetic flat plate, so that the detection depth is larger, and detection of sub-surface defects is achieved.

Description

technical field [0001] The invention belongs to the technical field of far-field eddy current nondestructive testing, and more specifically relates to a multi-layer electromagnetic shielding pulse far-field eddy current testing sensor. Background technique [0002] Non-destructive testing refers to the premise of not damaging the internal structure of the workpiece under test, using some physical and chemical methods to detect the workpiece, and then evaluate its performance. Eddy current testing is the most common testing method in nondestructive testing, and has been favored by scholars at home and abroad for its advantages of no contact, no couplant, and low cost. Far-field eddy current technology is a type of eddy current technology. It was first discovered in the detection of pipelines. It means that far-field eddy currents will be generated at a distance of 2 to 3 times the inner diameter of the pipeline from the excitation coil. Usually, the energy generated by the ex...

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
CPCG01N27/9006
Inventor 高斌杨昌荣
Owner 四川沐迪圣科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap