▎ 摘　　要

NOVELTY - Preparation of oxidation-graphene flexible foliar humidity sensor comprises (i) uniformly spin coating polyimide on a silicon dioxide substrate, fixing polyimide to obtain polyimide, (ii) plating a circular platinum electrode layer on the polyimide layer by vacuum plating film method, where the vacuum degree of vacuum plating is less than 0.1 Pa, the power is 100 W, and the temperature is 55℃, (iii) dropping an oxidized graphene solution on the circular electrode layer and the polyimide layer, and drying to form a graphene oxide layer, (iv)plating an E-type platinum electrode sheet on the oxidized and graphene polyimide layer through vacuum plated film method. (v) removing the silicone dioxide substrate. (vi) and (vii) welding the silicon dioxide substrates, circular electrode layers, and E type platinum electrode layers with a first lead, a second lead, and the second lead, and then access voltage collecting circuit. USE - Preparation method of oxidation-graphene flexible leaf surface humidity sensor used in agricultural production for monitoring crop health growth. Can also be used in preventing and treating plant diseases and insect pests. ADVANTAGE - The humidity sensor has ultra-fast response time and recovery time, does not need external power supply, and can completely joint the blade surface to accurately measure the humidity of the leaf surface. DESCRIPTION OF DRAWING(S) - The drawing shows a structure schematic diagram of the invention oxidation graphene the flexible foliar humidity sensor. 1Solution polyimide step 2Plating round platinum electrode layer 3Graphene oxide layer 4Plating e-type platinum electrode layer 201Polyimide main body portion 202First lead wire access part 401E-shaped main body part 402Second wire access portion