Study on Measurement Method of Large-Deformation of Structural Member using Piezoelectric Material

这项研究旨在开发一种座椅形状传感器，用于测量由弯曲或屈曲引起的结构部件的部分变形。在本研究中，从实验和理论分析两方面明确了传感器的变换与压电薄膜输出电压的关系。此外，还对传感器的结构和组成方法进行了研究，使传感器能够实际应用。通过对传感器的材料、形状、组成方法等方面的实验研究，得出了压电薄膜和导电薄膜的排列方式和电连接方法。(2)根据变形传感器测量原理的理论研究和梁的振动实验结果，建立了标准变形传感器的组成方法。阐明了变形传感器检测构件曲率半径的变化，传感器的输出信号与物体曲率半径成反比。通过两年的研究，建立了变形测量传感器的基本组成方法，并将该传感器提供给实际应用具有良好的前景

This research has aimed to develop a seat shape sensor that measures a partial deformation of a structural member caused by bending or buckling. In this research, the relation between the transformation of the sensor and the output voltage from piezoelectric films is cleared from both sides of the experiment and the theoretical analysis. In addition, the sensor configuration and the composition method were examined to put the sensor for practical use. The following results have been obtained by the research on two years(1) Through the experimental investigation concerning material, shape, and composition method of the sensor, the finding about the arrangement and the method of electrical connection of the piezoelectric films and electro-conductive films was obtained. The method of composing a standard deformation sensor was established(2) From the results of the theoretical examination concerning measurement principle of the deformation sensor and the vibration experiments of a beam with the deformation sensor, it was clarified that the deformation sensor detects the change of the curvature radius of structural member and that the output signal of the sensor is inverse proportional to radius of curvature of the objectAs the result of the research on two years, the basic composition method of the deformation measurement sensor was established, and the prospect of supplying this sensor to practical use is good