▎ 摘　　要

NOVELTY - Flexible waterproof bending strain sensor based on double sheets of paper comprises a rectangular conductive paper layer. One side of the conductive paper layer along the width direction is provided with another same conductive paper layer. Each of the conductive paper layers includes paper and conductive materials attached to the surface of the paper. The non-contact surface of the two conductive paper layers is provided with an encapsulation layer. Test leads are respectively led out from the two conductive paper layers, and each of the test leads extends to the outside of the encapsulation layer. USE - Used as flexible waterproof bending strain sensor based on double sheets of paper. ADVANTAGE - The sensor: avoids the problems of narrow detection range, low sensitivity and poor water resistance of the existing paper-based bending angle strain sensor; is economical and simple; and has wide detection range, high sensitivity and consistent bidirectional bending response, and excellent water resistance. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing the flexible waterproof bending strain sensor, comprising (i) cutting the paper into a strip shape, (ii) combining the paper with the conductive material to obtain a conductive paper layer, where the length of the conductive paper layer is 1-10 cm, and the width is 0.1-5 cm, (iii) arranging two conductive paper layers side by side along the width direction of any conductive paper layer and aligning cross-sections, and (iv) leading out the test leads at both ends of the two conductive paper layers respectively, and encapsulating and fixing the two conductive paper layers and the test leads with insulating polyimide tape. DESCRIPTION OF DRAWING(S) - The drawing shows a cross-sectional and top view of the flexible waterproof bending strain sensor based on double sheets of paper.