Multi-dimensional strain sensor with cross-shaped structure and preparation method thereof

The invention discloses a multi-dimensional strain sensor with a cross-shaped structure and a preparation method thereof, a double-layer cross-shaped structure is constructed by using double-layer laser-induced graphene, the laser-induced graphene is generated by ablating a polyimide film by ultraviolet laser, a substrate layer is a polyethylene foam acrylic acid double-sided adhesive tape, and the surface of the substrate layer is a surface layer of the polyethylene foam acrylic acid double-sided adhesive tape. Pins are led out from the two ends of the graphene electrode through the conductive copper foil, the graphene electrode is designed to be in a specific shape and is transferred through a polyethylene foam acrylic acid double-sided tape, and the conductive copper foil is cut into a specific shape through laser and is attached to the graphene electrode of the polyethylene foam substrate. The double-layer polyethylene foam substrate graphene electrodes are vertically and oppositely attached to construct