▎ 摘　　要

NOVELTY - Preparing flexible pressure sensor involves forming sensing layer on flexible substrate by using sensing raw material, and constructing graphical array structure of sensing raw material on the surface of sensing layer by directly writing or coating ink on the surface of sensing layer, where flexible substrate has hydrophilicity, and sensing raw material is aqueous dispersion liquid comprising graphene oxide. The sensing layer and graphical array structure are frozen and molded, flexible substrate is removed, frozen and dried, and reduction reaction is performed to reduce graphene oxide in sensing raw material into graphene to prepare three-dimensional graphene composite aerogel with graphical array structure. The three-dimensional graphene composite aerogel is placed into external electrode, three-dimensional graphene composite aerogel is placed into silicon rubber, vacuumized to fill silicon rubber in pores inside three-dimensional graphene composite aerogel, and cured. USE - Method for preparing flexible pressure sensor used in wearable device (claimed) for real-time monitoring of human physiological characteristic parameters and multiple motion states to provide reliable data support for healthy life of people. ADVANTAGE - The method enables to prepare three-dimensional graphene composite aerogel with graphical array structure to avoid using flexible substrate with micro-structure, simplify the preparation process, reduce the preparation cost, and overcome the problem of poor bonding force between the conductive material and the flexible substrate. The flexible pressure sensor is capable of improving sensitivity and widening the detection range. The sensor has high sensitivity. The identification of physiological signals such as pulse and sound and identification of motion information such as finger bending is realized. The manufactured flexible pressure sensor has good reliability and durability.