Capacitive flexible touch sensor based on spherical curved surface polar plate

A tactile sensor and spherical surface technology, applied in the field of sensors, can solve the problems of lack of tangential force detection capability and low detection sensitivity, achieve excellent dynamic response characteristics and detection sensitivity, improve detection sensitivity, good mechanical robustness and The effect of stability

Inactive Publication Date: 2019-07-30
JILIN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The first object of the present invention is to provide a capacitive flexible tactile sensor based on a spherical surface plate to solve the technical problem that the existing capacitive flexible tactile sensor does not have the ability to detect tangential force or has low detection sensitivity

Method used

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  • Capacitive flexible touch sensor based on spherical curved surface polar plate
  • Capacitive flexible touch sensor based on spherical curved surface polar plate
  • Capacitive flexible touch sensor based on spherical curved surface polar plate

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Embodiment 1

[0049] Embodiment 1 Capacitive flexible tactile sensor based on spherical surface polar plate

[0050] see Figure 1a , 1b , the capacitive flexible touch sensor based on the spherical surface plate provided by the present invention includes: a hemispherical flexible cavity 1, four spherical surface sensing plates 2, a flexible common plate 3, and a flexible substrate 4; wherein, the four The above-mentioned spherical surface induction plates 2 are attached and fixed on the inner wall of the hemispherical flexible cavity 1 at equal intervals, and the central axis of the hemispherical flexible cavity 1 is used as the symmetry line to be symmetrical in pairs, and each spherical surface The induction plates are not in contact with each other, and the bottoms of the four spherical induction plates are provided with electrode leads 5, and the electrode leads 5 are drawn out through the flexible base 4; the flexible common plate 3 is arranged on the flexible base 4, The flexible co...

Embodiment 2

[0055] Embodiment 2 The preparation method of the capacitive flexible tactile sensor based on the spherical surface polar plate

[0056] see figure 2 , a method for preparing a capacitive flexible tactile sensor based on a spherical surface plate provided by the present invention, specifically comprises the following steps:

[0057] Step S1, using three-dimensional modeling software and a 3D printer (Makerbot Replicator 2x, precision 100 μm, the United States) to prepare a mold corresponding to the hemispherical flexible cavity and the flexible substrate in the tactile sensor;

[0058] Step S2, inject silicone rubber into the mold, place in a vacuum drying oven (DZF-6021, Shanghai Suopu Instrument Co., Ltd.), and release the mold after curing at room temperature to obtain the required hemispherical flexible cavity and flexible substrate;

[0059] Step S3, uniformly coating YC-02 type silicone conductive silver glue on the corresponding positions of the hemispherical flexible...

Embodiment 3

[0062] Embodiment 3 Tactile perception method of capacitive flexible tactile sensor based on spherical surface polar plate

[0063] The working principle of the capacitive flexible tactile sensor based on the spherical surface plate can be equivalent to a parallel-plate capacitor with variable plate spacing; first, the functional relationship between the output capacitance and the structural parameters of the capacitive flexible tactile sensor in this paper is analyzed through theoretical calculations. Considering that the plate structure has the characteristics of non-planar and unequal areas, based on the principle of calculus, the spherical surface induction plate capacitor is equivalent to the cascade connection of infinitely many micro capacitors (parallel plate capacitors), and according to the capacitor level Integrate according to the connection rule. Figure 3 is a schematic diagram of the parameter structure of a single spherical surface plate capacitor, as shown in F...

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Abstract

The invention discloses a capacitive flexible touch sensor based on a spherical curved surface polar plate. The capacitive flexible touch sensor comprises a hemispherical flexible cavity, four spherical curved surface induction polar plates, a flexible public polar plate and a flexible substrate; wherein the four spherical curved surface induction polar plates are adhered to and fixed on the innerwall of the hemispherical flexible cavity at equal intervals, the four spherical curved surface induction polar plates are symmetrical pairwise by taking the central axis of the hemispherical flexible cavity as a symmetrical line, the spherical curved surface induction polar plates are not in contact with each other, the bottoms of the four spherical curved surface induction polar plates are provided with electrode leads, and the electrode leads penetrate through the flexible substrate and are led out; and the flexible public polar plate is arranged on the flexible substrate, the flexible public polar plate is not in contact with the four spherical curved surface induction polar plates, the four spherical curved surface induction polar plates which are distributed in a space three-dimensional mode and the bottom flexible public polar plate form four independent capacitive touch sensitive units, and a differential structure is formed. The sensor has the normal force and tangential force detection function and high detection sensitivity.

Description

technical field [0001] The invention relates to the technical field of sensors, in particular to a capacitive flexible touch sensor based on a spherical surface plate. Background technique [0002] As one of the important senses of the human body, the sense of touch is the main medium for perceiving external environmental information and interacting with external information. In recent years, the preparation of electronic skin (e-skin) based on mechanically sensitive materials simulating the excellent function of human skin in tactile perception has attracted widespread attention. Artificial intelligence and other fields have shown important application value. Traditional silicon-based and metal strain gauge tactile sensors used as electronic skin have disadvantages in terms of flexibility, ductility, and wearing comfort. Sensors have become a research hotspot of electronic skin at home and abroad. [0003] With the continuous development of smart materials and preparatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L5/16
CPCG01L5/165
Inventor 高永慧汤茜许德成张刚王也邵博
Owner JILIN NORMAL UNIV
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