▎ 摘　　要

NOVELTY - The method involves constructing an electrode member with resistance-capacitance characteristic from a sample to be tested and fitting an electrode system theoretical charge-discharge response curve by combining the type of the conductive filler, the specific gravity of polyimide and the interface dispersion form between two phases. The electrochemical response data of multiple joints of a workpiece to be detected are obtained by electrochemical detection equipment. The type or position of the structural change in the composite material is judged by comparing the difference between the actual measurement and the theoretical curve. The conductive metal is silver, gold, copper, aluminum, sodium, molybdenum, tungsten, zinc, nickel, iron, platinum, tin, or lead. The conductive metal oxide is sodium oxide, magnesium oxide, zinc oxide, potassium oxide or vanadium oxide. The carbon conductive filler is carbon black, graphite, graphene, carbon fiber or carbon nano tube. USE - Method for identifying structural characteristics of polyimide-based composite materials. ADVANTAGE - The detection process realizes strong operability, mild conditions and strong universality and provides an in-situ, rapid, effective and lossless smart sensing technology for accurately identifying the microstructure change of the polyimide-based conductive composite material and the workpiece. DESCRIPTION OF DRAWING(S) - The drawing shows the schematic diagram of plot of cyclic voltammetry of a sample. (Drawing includes non-English language text)