▎ 摘　　要

NOVELTY - Fabric substrate piezoelectric sensor based on zinc oxide nanorod structure, includes polyvinylidene fluoride film as the middle layer, and polyester fabric electrodes arranged on both sides of the polyvinylidene fluoride film as the upper and lower layers, where a layer of zinc oxide nanorods with piezoelectric effect is grown on the polyester fabric electrode. USE - The sensor is used for monitoring the changes of gestures and sensing different position information of the human body and for the detection of human body information. ADVANTAGE - The polyester fabric electrodes on which zinc oxide nanorods are grown by a two-step low-temperature hydrothermal method are used as the upper and lower layers of the sensor, and the polyvinylidene fluoride film with piezoelectric effect is introduced into the middle layer of the sensor. The piezoelectric sensor generates piezoelectric effect under the action of external force, and converts external mechanical energy into electrical energy. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a preparation method of the fabric substrate piezoelectric sensor, involving (a) after plasma treatment, immersing the polyester fabric in a mixed solution containing stannous chloride and hydrochloric acid, repeatedly immersing it in graphene oxide solution, and finally reducing with a solution containing a reducing agent to form a polyester fabric electrode, (b) putting the polyester fabric electrode prepared in step (a) into the zinc oxide seed solution, taking out the reaction, forming seed growth points on the surface of the fabric at room temperature, and reacting in a zinc oxide growth solution to prepare a polyester fabric electrode containing a zinc oxide nanorod array, (c) coating a layer of polyvinylidene fluoride solution on the glass sheet by a spin coating method, and preparing a polyvinylidene fluoride film after vacuum drying, and (d) assembling the polyester fabric electrode containing the zinc oxide nanorod array and the polyvinylidene fluoride film, connecting the electrodes by copper wires, and placing the assembly in a mold for packaging to prepare the piezoelectric sensor.