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A Variable Pitch Interdigital Adjacent Capacitive Sensor

A capacitive sensor and variable spacing technology, which is applied in the direction of using electric/magnetic devices to transmit sensing components, capacitance measurement, instruments, etc., to achieve the effect of increasing the effective electrode area, high sensitivity, and improving signal strength

Active Publication Date: 2018-03-09
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are few reports on the optimal design of interdigitated adjacent capacitive sensors with variable thickness structures

Method used

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  • A Variable Pitch Interdigital Adjacent Capacitive Sensor
  • A Variable Pitch Interdigital Adjacent Capacitive Sensor
  • A Variable Pitch Interdigital Adjacent Capacitive Sensor

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Embodiment Construction

[0040] Attached below figure 1 ~ attached Figure 11 The design of a variable pitch interdigital adjacent capacitive sensor is further described.

[0041] Based on the adjacent capacitance edge effect, a variable-pitch interdigitated adjacent capacitance sensor is designed to evaluate the dielectric properties of the thickness gradient structure.

[0042] A variable pitch interdigital adjacent capacitive sensor, its structure is as follows figure 1 As shown, it includes excitation electrode 1, induction electrode 2, substrate 3, shielding layer 4, and lead connector 5; The back of the substrate 3 ; the lead connector 5 is welded on the back of the substrate 3 .

[0043] The excitation electrode 1 and the induction electrode 2 are made of 0.1mm thick high-conductivity copper foil, the width of the excitation electrode 1 and the induction electrode 2 are 40mm, and the total length is 38mm; the excitation electrode 1 and the induction electrode 2 each include three an interdi...

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Abstract

The invention relates to a variable-pitch interdigital adjacent capacitance sensor, which is used for detecting the dielectric properties of polymer materials with variable thickness, and belongs to the field of non-destructive testing. The sensor is mainly composed of excitation electrodes, sensing electrodes, substrate, shielding layer and lead joints. The characteristics of the exciting electrode and the sensing electrode are that they both contain a plurality of interdigital units. According to the change rule of the thickness of the structure to be measured, the width and spacing of each interdigital unit composing the interdigital sensor electrodes are independently optimized, that is, to ensure that the wear Under the condition of penetration depth, make the electrode width as large as possible to obtain the maximum signal strength and detection sensitivity. Compared with the traditional equidistant interdigital adjacent capacitive sensor, the effective electrode area of ​​the variable interdigital adjacent capacitive sensor is increased, and the signal strength and detection sensitivity are improved.

Description

technical field [0001] The invention relates to a novel adjacent capacitance sensor, in particular to a variable pitch interdigital adjacent capacitance sensor, which is used for detecting the dielectric properties of polymer materials with variable thickness, and belongs to the field of non-destructive detection. Background technique [0002] Polymer materials are widely used in various industrial fields due to their light weight, strong plasticity, high strength, and corrosion resistance, such as municipal water supply pipe networks, basic support components of various instrument panels / panels, and external insulation materials for power systems, etc. . During long-term use, these polymer materials are prone to aging and failure due to the combined effects of external factors such as heat, light, oxygen, and water. Taking the composite insulator of the power system as an example, the outer insulating part is made of a typical high-molecular material such as high-temperatu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R27/26
CPCH03K2217/960765H03K2217/960775G01B7/023H03K17/955G01D5/24B60R19/483G01R27/2605
Inventor 焦敬品李亮李楠何存富吴斌
Owner BEIJING UNIV OF TECH
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