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Novel high-frequency shielding eddy current probe

An eddy current probe, high-frequency technology, applied in instruments, measuring devices, material analysis by electromagnetic means, etc., can solve the problems of limited detection environment conditions, large probe volume, inability to implement, etc., to reduce probe volume and simplify production. Process, high shielding effect

Inactive Publication Date: 2018-03-27
EDDYSUN (XIAMEN) ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for some special occasions, due to the limitation of the detection environment, the above method has a large probe volume and cannot be implemented

Method used

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  • Novel high-frequency shielding eddy current probe
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  • Novel high-frequency shielding eddy current probe

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Embodiment one, such as figure 1 , a new type of high-frequency shielded eddy current probe, including a magnetic sheet 1, one or more flat eddy current coils 2, characterized in that: when a flat eddy current coil 2 is used, the magnetic sheet 1 is covered and fixed on the upper end surface of the flat eddy current coil 2, and the magnetic sheet The area of ​​1 is larger than that of the end face of the flat eddy current coil 2; the magnetic sheet 1 is used to gather magnetism and strengthen the high-frequency alternating induction magnetic field of the flat eddy current coil 2 below it, while shielding the external electromagnetic interference above it. The flat eddy current coil 2 is manufactured by coil planar spiral winding or printed circuit board spiral printing.

Embodiment 2

[0013] Embodiment two, such as figure 2 , a new type of high-frequency shielded eddy current probe, including a magnetic piece 1, two flat eddy current coils 2, characterized in that: when two flat eddy current coils 2, the two flat eddy current coils 2 are fixed side by side, and the magnetic piece 1 is covered and fixed on the two The upper end surface of two flat eddy current coils 2, the area of ​​the magnetic sheet 1 is greater than the sum of the end surface areas of the two flat eddy current coils 2; At the same time shield the external electromagnetic interference above it. The flat eddy current coil 2 is manufactured by coil planar spiral winding or printed circuit board spiral printing.

Embodiment 3

[0014] Embodiment three, such as image 3 , a new type of high-frequency shielded eddy current probe, including a magnetic sheet 1, a plurality of flat eddy current coils 2, characterized in that: when a plurality of flat eddy current coils 2, the plurality of flat eddy current coils 2 are fixed in an array, and the magnetic sheet 1 is covered and fixed on On the upper end surfaces of multiple flat eddy current coils 2, the area of ​​the magnetic sheet 1 is greater than the sum of the area of ​​the end surfaces of the multiple flat eddy current coils 2; the magnetic sheet 1 is used to gather magnetism and strengthen the high frequency alternating induction magnetic field of the flat eddy current coils 2 below it , while shielding the external electromagnetic interference above it. The magnetic sheet 1 is made of ferrite or NdFeB material. The flat eddy current coil 2 is manufactured by coil planar spiral winding or printed circuit board spiral printing.

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PUM

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Abstract

The invention discloses a novel high-frequency shielding eddy current probe. Based on the characteristics of fewer turns per coil of the high-frequency eddy current probe, the high-frequency shieldingeddy current probe formed by a flat eddy current coil and a magnetic sheet is adopted, so that the shielding effect and high detection sensitivity effect can be guaranteed, meanwhile, the volume of the probe is greatly reduced, the production process is simplified, the actual production application requirements can be met, and the probe can be suitable for detection work of more rigorous detection environments.

Description

technical field [0001] The invention relates to a non-destructive testing device, in particular to a novel high-frequency shielded eddy current probe. Background technique [0002] In order to solve the edge effect of eddy current detection and meet the special detection requirements of some workpieces, conventional eddy current magnetic shielding probes use magnetic rings or magnetic pots as outer shielding covers, which not only realize electromagnetic shielding, but also increase coil inductance and reduce copper consumption effect. However, for some special occasions, due to the limitation of the detection environment, the above-mentioned method has a large probe volume and cannot be implemented. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a new type of high-frequency shielded eddy current probe. Based on the characteristics of fewer coil turns of the high-frequency eddy current p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/90
CPCG01N27/9006
Inventor 林俊明倪培君戴永红宋凯
Owner EDDYSUN (XIAMEN) ELECTRONICS CO LTD