圧電材料と配列型センサプローブによる材料表面のひずみ分布計測に関する研究 Study on Local Strain Distribution Measurement for Structural Members by using Piezoelectric Material and Sensor Array
A new technique for surface strain distribution measurement has been developed by the use of piezoelectric material and sensor array. A piezoelectric element (PVDF film) is mounted onto the structure surface, and then electrical charge induced by the surface deformation is measured by sensor array at the multi point simultaneously. In this research, total system to measure strain distribution has been developed, which consists of the following parts; array sensor and signal processing circuit to measure a strain distribution of surface of material, circuit to transfer the measured data to personal computer, and software to process the measured results. The validity and accuracy of proposed technique is given by performing experiment using fatigue testing machine and then compare the result to the FEM analysis.