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Array-type flexible electric eddy sensor

An eddy current sensor and flexible electrical technology, applied in the field of sensors, can solve problems such as difficulty in vibration, and achieve the effect of compact structure

Inactive Publication Date: 2002-07-03
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this circuit is that it is difficult to start oscillation when the quality factor of the sensitive coil is small

Method used

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  • Array-type flexible electric eddy sensor
  • Array-type flexible electric eddy sensor

Examples

Experimental program
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Embodiment Construction

[0032] The structures of several sensitive coil embodiments designed by the present invention are as follows: image 3 As shown, the sensitive coil is fabricated on a flexible material film substrate suitable for the process by FPCB process, wherein: image 3 (a) The coil 11 in (a) is a single-layer helical circular coil, the front lead-out line 113 is a signal line, the back lead-out line (the back line is indicated by a dotted line, the same below) 112 is a ground wire, and the front and back windings are connected through the central via hole 111 ; image 3 (b) The middle coil 12 is a double-layer helical circular coil, the front lead-out line 123 is a signal line, the back lead-out line 122 is a ground wire, and the front and back windings are connected through the central via hole 121; image 3 (c) The middle coil 13 is a single-layer helical square coil, the front lead-out line 133 is a signal line, the back lead-out line 132 is a ground wire, and the front and back win...

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Abstract

An array-type flexible electric eddy sensor is composed of sensing coil array on the film substrate, leading-out signal line, grounding line, multi-channel gating switch and clapp oscillator. Its advantages include not deformation and high temp performance and consistancy.

Description

technical field [0001] The invention belongs to the technical field of sensors, in particular to the structural design of an eddy current sensor. Background technique [0002] Eddy current testing technology is a non-destructive, non-contact measurement testing technology. The eddy current sensor has the advantages of simple structure, high sensitivity, large measurement linear range, no influence of oil and other media, and strong anti-interference ability. It is widely used in machinery, electric power, petroleum, chemical, textile, aviation, atomic energy and other industrial sectors. application. For example, it is used to measure displacement, size, thickness, vibration, speed, pressure, conductivity, temperature and other parameters and detect metal parts defects. [0003] The sensitive element of the traditional eddy current sensor is a coil made of enameled wire. Coil size is greatly affected by temperature, therefore, its temperature performance is poor. At the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B7/02G01N27/90
CPCG01N27/9006
Inventor 丁天怀黄毅平朱惠忠陈祥林
Owner TSINGHUA UNIV
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