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A fully flexible touch-pressure sensor based on capacitance-resistor composite

A capacitive resistance, composite technology, applied in the field of sensing, can solve the problem that the sensor cannot detect both tactile force and pressure force, and achieve the effect of improving resolution and sensitivity, simple preparation process, and avoiding cumbersome wiring

Active Publication Date: 2018-11-20
合肥庐阳科技创新集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies in the existing tactile sensors and pressure sensors, and propose a fully flexible touch-pressure sensor based on capacitance-resistor composite, to solve the problem that existing sensors cannot detect both tactile force and pressure sensor. pressure function problems

Method used

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  • A fully flexible touch-pressure sensor based on capacitance-resistor composite
  • A fully flexible touch-pressure sensor based on capacitance-resistor composite
  • A fully flexible touch-pressure sensor based on capacitance-resistor composite

Examples

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Effect test

Embodiment 1

[0031] Such as figure 1 , figure 2 As shown, the fully flexible touch pressure sensor based on the capacitance-resistance composite type in this embodiment has a multi-layer upper and lower structure, and a lower electrode 7 is arranged on the upper surface of the flexible substrate 6, and a resistive layer 5 is arranged above the lower electrode 7. A common electrode 4 is provided above the resistance layer 5, a capacitive layer 3 is provided above the common electrode 4, an upper electrode 2 is provided above the capacitive layer 3, and a flexible protective layer 1 is provided above the upper electrode 2;

[0032] Wherein the capacitance layer 3 is located above the resistance layer 5, the thickness of the capacitance layer 3 is 1 mm, the thickness of the resistance layer 5 is 2 mm, the height of the entire sensor is 3.5 mm, and the diameter is 8 mm;

[0033] The resistive layer 5 uses carbon nanotubes / carbon black filled silicone rubber as the sensitive material, adopts ...

Embodiment 2

[0054] In order to explore the influence of different sensitive materials on the performance of the sensor, in this embodiment, the sensitive material of the capacitance layer 3 in the embodiment 1 is replaced with PDMS, and the rest remain the same as in the embodiment 1. The capacitance-stress relationship curve of the gained fully flexible touch pressure sensor is as follows Figure 9 As shown, compared with the capacitive layer made of silicone rubber as the sensitive material, the capacitive layer made of PDMS has higher sensitivity, but the resolution is only 0.5N.

Embodiment 3

[0056] In order to explore the influence of different sensitive materials on the performance of the sensor, in this embodiment, the sensitive material of the resistance layer 5 in the embodiment 1 is replaced by a carbon nanotube / carbon black filled silicone rubber with a mass fraction of 6%, and the rest remain the same as in the embodiment 1. . The resistance-stress relationship curve of the gained fully flexible tactile pressure sensor is as follows Figure 10 As shown, compared with the carbon nanotube / carbon black filled silicone rubber with a mass fraction of 5% as a resistive layer, the carbon nanotube / carbon black filled silicone rubber with a mass fraction of 6% has a higher sensitivity , but it can only detect a maximum stress of 80N (1250kPa).

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Abstract

The invention discloses a composite capacitor-resistor type full-flexibility touch and pressure sensor. With the sensor, a problem that the touch and the pressure can not be detected simultaneously by the existing sensor can be solved. The sensor is characterized in that a capacitor layer and a resistor layer are arranged on a flexible substrate in an up-down structure mode; the capacitor layer is used for sensing touch information and the resistor layer is used for sensing pressure information; and the capacitor layer is arranged on the resistor layer. Compared with the common touch sensor and the pressure sensor, the provided composite capacitor-resistor type full-flexibility touch and pressure sensor is not only capable of distinguishing a small touch force but also is capable of realizing measurement of a large pressure, so that the resolution and sensitivity of the sensor in the small range can be improved and the resolutions and precision of sensor at different ranges can be guaranteed. All materials employed by the sensor have high flexibility and all leads are led to the bottom, so that an array form of the sensor can be realized well and thus the maintenance of the sensor can be realized conveniently.

Description

technical field [0001] The invention belongs to the technical field of sensing, and relates to a fully flexible touch-pressure sensor applied to artificial intelligence skin. Background technique [0002] Human skin is an exquisite and complex sensory system, which contains a variety of biosensors. These sensors can perceive a variety of external stimuli, such as heat changes, touch, extrusion, deformation, chemical corrosion, etc. Human skin can not only perceive these external stimuli, but also has high sensitivity and resolution. Human skin's perception of mechanical stimuli is mainly divided into tactile perception and pressure perception. The tactile corpuscle in the skin can sense tactile stimulation, and the ring corpuscle can sense pressure stimuli. The sense of touch is produced by a stimulus that is very slight and not strong enough to cause skin deformation, and the sense of pressure is produced by a force that can cause skin deformation. With the development of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01L1/14G01L1/18B32B9/00B32B27/06B32B25/04B32B25/20B32B15/06B32B27/28
CPCB32B9/007B32B15/06B32B25/042B32B25/20B32B27/06B32B27/281B32B2307/51B32B2319/00B32B2379/08B32B2457/16G01L1/148G01L1/18
Inventor 黄英方定高乐郭小辉汪卫华
Owner 合肥庐阳科技创新集团有限公司
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