La添加積層型PZT素子を電源とした自立型無線加速度モニタリングシステムの実証試験

抄録

The development of micro power supply technologies for mobile phones and portable electronics has increased in recent years. Methods of self-power generation using the vibration loads of structures have attracted attention as the power supply technologies. The purpose of the study is to develop a high-efficiency PZT generator element that utilizes the vibration loads in the support members of a structure, and a wireless accelerometer device using the PZT generator element as a power source. In this paper, we report results of verification tests of a wireless acceleration monitoring system that employs a small air compressor as a vibration source and drives the wireless accelerometer device by vibration power generation using La-doped and laminated PZT elements. The wireless accelerometer device is composed of constant voltage circuit, capacitors, switching circuit, voltage sensor and wireless accelerometer module. The charges generated from La-doped and laminated PZT element are charged by the capacitor, and it reaches to the wireless accelerometer through the switching circuit. As results of the tests, it is confirmed that the wireless accelerometer device using La-doped and laminated PZT elements is driven by vibrations of the small compressor.