Design and Experimental Study of Piezoelectric Energy Harvesting Through Offset Movement on Vehicle Rims

The development of piezoelectric energy harvesters based on rotational motion is particularly attractive, with the possibility of using car tires as one source of rotational motion to power wireless sensor systems that can operate on their own. The objective of this project is to create a novel piezoelectric-based energy harvesting device using gravity forces in rotating tire treads for vehicles. The piezoelectric energy harvester is built to respond to the dynamics of gravitational force, which causes movement when mass is added away from the center of gravity. It is suggested that gravitational force excitation be tested in the harvester system to find out how much voltage and power the piezoelectric rotational energy harvester can produce when it is driven by gravity. In a parallel configuration, the excitation of vehicle tire tread speed was examined experimentally. Experimental results with a maximum instantaneous output voltage of around 4–7 V were achieved in parallel connections. On a parallel connection, the maximum power and RMS that can be sent are 2200 μW and 298 μW, respectively. The harvester can also charge capacitors 22 μF with a voltage and saturation power of 3.9 V.