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Abstract

This paper is a comparative study of energy harvesting technology based on mechanical vibration. Recently, the study of the conversion of vibrational energy into electrical power has become a major field of research. Recent advances on ultra-low power portable electronic devices for low cost power supply are using conventional battery. However problems can occur when batteries die off because of their finite lifespan. In portable electronics, battery needs to be replaced when it dies replacement of the battery can become a tedious task because we do not know when the battery dies. People searched for more efficient portable power sources for advanced electronic devices. The critical long-term solution should therefore be independently of the limited energy available during the functioning or operation of such devices. Mechanical Energy Harvesting Systems may enable wireless and portable electronic devices to operate because they carry their own power supply that completely self-powered. Various types of vibration devices, piezoelectric materials and mathematical modeling of vibrational energy harvestings are summarized. This paper will investigates some of the research that has been performed in the area of vibration energy harvesting.