Exploring Piezoelectric for Sound Wave as Energy Harvester

Abstract

This paper presents the characteristic of piezoelectric for sound wave energy harvester. The sound level on piezoelectric is experimented at range of 35-100 dB. This range is comparable with ambience environmental human sound of level 50-100 dB. Piezoelectric type Q220-A4-503YB has been used as energy transducer. This type of piezoelectric has achieved a better performance in term of output power or voltage. The output of piezoelectric transducer is connected to 3 difference types of harnessing circuitry; Villard voltage multiplier, Dickson voltage multiplier and full-wave rectifier. The measured results of piezoelectric transducer with and without connected to external circuitry devices have attained a good agreement with expected theory within the frequency of interest. The piezoelectric transducer accomplished maximum power response of performance 33.133 dBuW at sound level of 96 dB. The Villard and Dickson voltage multipliers produced output voltage greater than full wave bridges which are 9.817 V, 9.593 V and 3.504 V respectively at 96 dB sound intensity level. The results show that the piezoelectric transducer connected to Villard voltage multiplier produced the best performance. The proposed sound wave energy harvester offer a better performance and able to replace the problematic battery in wireless signal network.