Flexible stress sensing device of full-textile materials

Patent metadata

Field	Value
Publication number	US-11454557-B2
Application number	US-201816461143-A
Country	US
Kind code	B2
Filing date	May 9, 2018
Priority date	Apr 28, 2018
Publication date	Sep 27, 2022
Grant date	Sep 27, 2022

Abstract

A flexible stress sensing device is provided, which includes a flexible cloth substrate, a flexible stress sensor and textile knots configured to fix the flexible stress sensor on the flexible cloth substrate. The flexible stress sensor includes two conductive fiber bundles, wherein each of the conductive fiber bundles is provided with a loose structure, and the loose structures of two conductive fiber bundles contact with each other and form a stress sensing unit. The flexible stress sensing device can be washable, is not easy to fall off, and can resist against motion interference, and has other advantages of high resolution, high sensitivity and a compatibility with the prior textile techniques.

First claim

What is claimed:

1. A flexible stress sensing device comprising:
a flexible cloth substrate;
a flexible stress sensor including two conductive fiber bundles, wherein each of the conductive fiber bundles has a loose structure, and the loose structures of the two conductive fiber bundles contact with each other and form a stress sensing unit; and
four textile knots configured to fix the flexible stress sensor on the flexible cloth substrate;
wherein each loose structure includes multiple conductive filaments, and a plurality of gaps exist between the multiple conductive filaments; and in the stress sensing unit, an amount of conducting current paths formed between conductive filaments which contact with each other and gaps between conductive filaments are correspondingly changed along with a change of an external force.

2. The flexible stress sensing device of claim 1 , wherein the flexible cloth substrate is a non-conductive material, which may be hemp, mulberry silk, polyester, plain cloth, fine cloth, silk or flannel.

3. The flexible stress sensing device of claim 1 , wherein the loose structures of the two conductive fiber bundles are mutually stacked in a crossed manner or are interspersed with each other or are in butt joint with each other.

4. The flexible stress sensing device of claim 1 , wherein the stress sensing unit is fixed on the flexible cloth substrate via the four textile knots, and a distance between each textile knot and a center of the stress sensing unit is greater than 1 mm.

5. The flexible stress sensing device of claim 1 , wherein the conductive filaments are carbon, metal or conductive polymer materials.

6. The flexible stress sensing device of claim 5 , wherein the amount of the multiple conductive filaments of each loose structure is more than 10.

7. The flexible stress sensing device of claim 1 , wherein the flexible stress sensor is connected with two wires which extend outwards.

Assignees

• Univ Wuyi

Inventors

• Luo Jianyi
• Huang Jingcheng
• Hu Xiaoyan
• Liang Baowen

Classifications

• D03D1/0088

  Fabrics having an electronic function · CPC title

• D10B2331/04

  polyesters, e.g. polyethylene terephthalate [PET] · CPC title

• G01L1/20 Primary

  by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids (of piezo-resistive materials G01L1/18); by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress · CPC title

• D03D13/004

  with weave pattern being non-standard or providing special effects · CPC title

• G01L1/2287 Primary

  constructional details of the strain gauges (adjustable resistors H01C10/00) · CPC title