Properties of Car-Embedded Vibrating Type Piezoelectric Harvesting System

We investigated the harvesting performance of a double piezoelectric generator, which was embedded into engine block small passenger car. The resonance frequency is approximately between 37 and 52 Hz, where cantilever showed maximum displacement. In reality, has vibrating characteristic, dramatically reduces displacement, even when operating deviates slightly from frequency. To acquire large mechanical energy-to-electrical energy conversion, multiple-piezoelectric generator employed to absorb vibration switched non-resonance this study, variable mass box designed installed in consisted serial connection two masses with different weights. deviated within few hertz (3~4 Hz); reduction lower, leading significant acquisition resulting power. This due matching realized by action dual mass. type produced up 0.038 0.357 mW at 2200 3200 rpm, respectively.