▎ 摘　　要

NOVELTY - The sensor has a humidity sensitive composite film whose two surfaces are provided with a flexible porous electrode (1). The humidity sensitive composite film is provided with reduced graphene oxide (2), polyimide (3) and piezoelectric ceramic particles (4). An interface between the humidity sensitive composite film and the flexible porous electrode is formed as an electromechanical contact interface. A surface of the humidity sensitive composite film at hole of the flexible porous electrode is provided as a humidity sensitivity interface for water vapor molecules to permeate, adsorption and desorption to realize a synergistic effect of wet-sensitive sensing and transduction. The flexible porous electrode is led out by a lead, and detects an electric signal output by the sensor. The humidity sensitive composite film includes precursor solution. USE - Self-driven humidity sensor for sensing change of ambient humidity and converting the ambient humidity into electric signal. Uses include but are not limited to industry, environmental protection, medical treatment, national defense and scientific research fields. ADVANTAGE - The sensor has high performance, and simultaneously drives an environment energy collection-spontaneous active detection integrated detection system by external mechanical movement and uses mechanism of absorbing water molecule to influence dielectric constant, so that adsorption reaction is modulated into a piezoelectric response of the device with different humidity in an outer side, and chemical specific reaction is converted into the electric signal at an energy conversion interface, thus realizing real-time spontaneous active detection of the humidity. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for manufacturing a self-driven humidity sensor. DESCRIPTION OF DRAWING(S) - The drawing shows a perspective view of a self-driven humidity sensor for sensing change of ambient humidity and converting the ambient humidity into electric signal. Flexible porous electrode (1) Reduced graphene oxide (2) Polyimide (3) Piezoelectric ceramic particles (4)