Design implementation of energy harvesting system using piezoelectric sensors

摘要

Energy harvesting is a process by which energy is originated and taken from external sources such as solar power, thermal energy, wind energy, salinity gradients, and kinetic energy etc. The sampled energy is captured, and stored for small, wireless autonomous devices, like those used in wearable electronics and wireless sensor networks. In this work the piezoelectric material is used for this purpose. There are a number of methods available as the mean of energy harvesting techniques, but the mechanical energy harvesting can be considered to be the most prominent. This technique is based upon piezoelectric components where deformation is produced by different means are directly converted to electrical charge via piezoelectric effect. Then after the electrical energy can be regulated or stored for further use. This work proposes an innovative method using freewheel and reciprocating motion.