DESIGN AND FABRICATION OF VIBRATION BASED ENERGY HARVESTER FOR WIRELESS SENSOR NETWORK

Energy harvesting is the process by which energy is derived from the external
sources from hydropower, solar energy and many more. This project involves in the
design and characterization of vibration based electromagnetic energy harvester
system. This type has high potential to be investigated and utilized. The main
purpose of this project is to improve the previous design and suitable to be used for
low power applications such as the wireless sensor network. In developing the new
prototype, both electrical and mechanical improvement of the previous design are
considered. Utilizing the fundamental Faraday’s law, it serves as a succinct summary
of the ways a voltage (or emf) may be generated by a changing magnetic
environment. The expectation of the new prototype is the improvement of the overall
efficiency in both the output power and also bandwidth. The prototype is design
using the engineering software tools such as AutoCAD. Finally, the completed
design will be followed by device fabrication. To investigate the performance of the
prototype, both the electrical and mechanical characterization have been performed
such as the open and close loop voltage, impedance matching, resonant frequency
and bandwidth. From the characterization process, it was found that the open-loop
and close-loop voltage produces by the device is 5.729 V and 2.920 V, device
internal resistance is 560  , device resonant frequency occurred at 29.4 Hz and
device bandwidth 9 Hz which are better than the previous prototype.