Charaterization of Differents Dimension Piezoelectric Transducer for Sound Wave Energy Harvesting

Abstract

Abstract This paper presents an investigation on characterization of variety types of piezoelectric profile for a sound wave energy harvester system design. Energy harvesting systems based on the convention of environmental acoustic vibrations into electrical energy are increasingly being used for low voltage applications due to the reduction in power consumption of modern day systems. The varieties of piezoelectric transducer structures are targeted to resonate at the ambient frequency which is below 1 kHz. The experimented sound level of the piezoelectric is at the range of 35-100 dB. It is comparable with ambience environmental human sound of level 50-100 dB. It is found that the QB 220-A4-503YB type - has shown a better performance of output power and sound level value. An energy harvester of piezoelectric transducer accomplished constant stage with the maximum amplitude at sound level of 96 dB. The measured results of piezoelectric strip with and without connected to external harvesting circuit devices have attained a good agreement within the frequency of interest. The piezoelectric transducer accomplished maximum power response performance at the 96 dB and 33.133 dB (uW). The results show that the customs size of piezoelectric will affects the efficiencies of the transducers to harvest energy. The large size piezoelectric transducer is able to convert a higher mechanical energy from sound wave into electrical energy. The proposed sound energy harvester can be used to replace the existing battery as a power source in wireless sensor network system as they offer better performance at lower cost.