高分子圧電フィルムを用いた円管内壁欠陥の測定とシミュレーション
Measurement and Simulation of Detection of Defects on Inner Wallof Cylindrical Pipe by Piezoelectric High-polymer Film.
著者:
髙橋 俊文 Toshibumi TAKAHASHI 松本 英治 Eiji MATSUMOTO
発刊日:
公開日:
Electric PotentialPiezoelectricityPolyvinylidene Fluoride(PVDF)SensorStrain Distribution
概要
Piezoelectric thin film has been used to visualize back surface defects in plates. When the plate with a back surface defect is deformed, the resultant strain distribution in the front surface reflects the shape of the de fect. Such surface strain distribution can be measured by scanning the electrostatic voltmeter over the piezoelectric film mounted on the front surface. In view of significant troubles of nuclear power plants due to defec t in pipes such as cracks and wastages, new nondestructive techniques are expected to detect such invisible defects. Visualization of back-surface defects by piezoelectric thin film is one of promising nondestructive tec hniques applicable to on-site and on-line monitoring. Then, the purpose of this paper is to detect defects on inner wall of cylindrical pipe from potential distribution on piezoelectric thin film mounted on outer surface.
