Development of Piezoelectric Energy Harvester Based on Two-Stage Force Amplification Frame

Wong, Joon Kit (2020) Development of Piezoelectric Energy Harvester Based on Two-Stage Force Amplification Frame. Final Year Project (Bachelor), Tunku Abdul Rahman University College.

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Abstract

The demand for electricity is rising due to the growth of human population. It is important to shift our dependency onto renewable energy sources and piezoelectric technologies will be one of the approach in energy harvesting. Currently, combustion of fossil fuels placing human life and surrounding environment at risk. Human produces energy every day while walking or running and these wasted energy can be utilized and converted it into useful energy. Hence, piezoelectric material is used to convert these wasted mechanical energy into electrical energy by using direct piezoelectric effect. Since factors such as force amplification ratio and force transmission efficiency are still lacking in the current energy harvesting modules, therefore the purposes of this project are to analyze the stress distribution and factor of safety on the improved force amplification frame design based on piezoelectric material and floor tiles design and optimize the force amplification ratio using force amplification energy harvesting method. This project focused on improving the parameters such as force amplification ratio to determine the output force produced and utilizing the compressive stress in piezoelectric material as well as the module to determine the optimum stress distribution. Combination of single and compound two-stage frame design with extra linkage support was proposed in methodology and has been analyzed. ANSYS simulation software was used to simulate the design. Force amplification ratio of 25.30 with Factor of Safety (FOS) of 1.6 were obtained. The force amplification ratio of the proposed design was improved by 11.85% compared with the existing designs.