Research Viration On Wideband Linear Resonant Generator Energy Harvesting Device For Remote Sensing Applications

Yong, Zi Wha (2015) Research Viration On Wideband Linear Resonant Generator Energy Harvesting Device For Remote Sensing Applications. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

Vibration energy harvesting is an attractive technique for potential powering of wireless sensor and low power devices. But, in research showed that most harvesters are work efficiently only with limited bandwidth near their resonant frequencies. Thus, strategies to increase the bandwidth of the vibration energy harvesters become one of the most critical issue before these harvesters can be widely deployed in practical. This report represents the linear resonant device, a electromagnetic energy harvester that can convert transverse vibration energy to electrical energy. It will first introduced with analytical study and the solutions that have been done by past researchers. Next, for the methodology, the method used for conducting the experiment is electromagnetic. The apparatus are mainly consists of a steel beam, a permanent magnets, copper coils, voltmeter, resistor decade box, shaker and analyzer. There are four types of experiments which including free vibration, quasi-static experiment, dynamic testing and calculation for the maximum power harvested among various resistance. The solution to widen the bandwidth is by altering the resister of the system. The power harvested is calculated and it shows that 50 Ω of resistance produced the highest power but not 200 Ω. In addition, the main problem in this experiment is that excitation frequency of 20 Hz was not able to produce any voltage at all. The 40 mm of steel beam was also gave the wrong data and results. The reasons were analyzed and investigated and discuss in the report. On the other hand, 36 mm of steel beam gave the best result as the linear generator successfully to wide its band obviously and it also showed that the open circuit reach the highest peak. At last, the trend of the experimental study will be compared with the analytical study of the project.

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