Flexible stress sensing device of full-textile materials

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.