20408 Study on development of the acceleration sensor using the laminated piezoelectric elements (Effect of measurement impedance)

Abstract

The purpose of this study is to develop an amplifier free accelerometer using a laminated PZT element of power generation element of high output among the piezo element. The evaluation of output characteristics of the voltage sensitivity, frequency characteristic and the phase difference with respect to vibration acceleration input of the laminated piezoelectric element weight is attached to the tip to improve the voltage output characteristic. The effects of measurement impedance in measuring circuit to the laminated PZT sensor on output characteristics of voltage sensitivity, frequency characteristics and phase difference of the laminated piezoelectric element are evaluated by vibration power generation tests.