Magnetic aggregation pulse eddy current coil detecting sensor

A detection sensor and pulsed eddy current technology, applied in instruments, measuring devices, scientific instruments, etc., can solve the problems of wide distribution of magnetic field, weak signal, large noise, etc., to improve detection ability, improve heating problem, improve detection signal reliability The effect of noise ratio

Active Publication Date: 2017-08-18
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem existing in the existing coil structure is that the generated magnetic field is widely distributed in space and scattered, the signal detected by the detection sensor is weak and the noise is large

Method used

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  • Magnetic aggregation pulse eddy current coil detecting sensor
  • Magnetic aggregation pulse eddy current coil detecting sensor
  • Magnetic aggregation pulse eddy current coil detecting sensor

Examples

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Embodiment

[0029] figure 1 It is a working principle diagram of a magnetic concentration pulse eddy current coil detection sensor of the present invention.

[0030] In this example, if figure 2 As shown, a magnetic concentration pulsed eddy current coil detection sensor of the present invention includes: an inner iron core 1 , a detection coil 2 , an inner shield 3 , an excitation coil 4 , an outer shield 5 and a casing 6 .

[0031] in, figure 2 (a) main view, figure 2 (b) is a top view, image 3 It is the top view of the sensor without the housing. The sensor described in the present invention will be specifically described below in conjunction with these two figures.

[0032] The inner iron core 1 is a solid cylinder, located at the center of the entire sensor, and is made of ferromagnetic material with high magnetic permeability. In this embodiment, it is made of a ferrite bar to enhance the magnetic field strength. Improve the detection depth and detection signal strength. T...

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Abstract

The invention discloses a magnetic aggregation pulse eddy current coil detecting sensor. The magnetic aggregation pulse eddy current coil detecting sensor comprises a shell, a high-magnetic-conductivity ferro-magnetic material as an isolator is arranged between an exciting coil and a detecting coil, and a high-magnetic-conductivity ferro-magnetic material as a shielding cover is arranged on the outside of the exciting coil, so that a magnetic field distribution region generated by the exciting coil is centralized. Particularly, a signal source transmits a square signal to the exciting coil, the exciting coil is driven by the square signal to generate a magnetic field, after the detecting coil detects a magnetic field generated by the exciting coil, the magnetic field is superposed to a magnetic field generated by a component to be detected, the superposed magnetic fields are input to a data acquisition module through a wiring end, and finally, data are processed through an upper computer to obtain an acquired detecting signal.

Description

technical field [0001] The invention belongs to the technical field of pulsed eddy current non-destructive testing, and more specifically relates to a magnetic concentration pulsed eddy current coil detection sensor. Background technique [0002] Non-destructive testing technology is based on the premise of not destroying the internal structure of the object to be tested, and uses physical methods to detect and evaluate possible defects inside the object. Eddy current is an important method among many categories of non-destructive testing methods. Its principle is to apply an alternating current at the end of the excitation coil to generate an alternating magnetic field. The magnetic field generates alternating eddy currents in the test piece. The eddy current in the medium generates a secondary magnetic field, and the detection sensor is used to detect the superimposed field of the source magnetic field and the secondary magnetic field, and through the analysis of the detec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/90
CPCG01N27/9006
Inventor 高斌邓炜汤广平李建文孙朝明田贵云
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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