Design of a Self-Powered Wireless Transmitter

This paper deals on converting mechanical impact on piezoelectric plate into electrical energy and using this harvested energy to power a wireless sensor node (WSN). Here we discuss on the power processing unit which consists of rectification, storage and regulation of voltage. The wireless sensor node senses the ambient vibrations around it and uses the harvested energy to send unique identification information from a microcontroller. Different capacitances have been tested and an optimized value is chosen depending on current and voltage requirements. Finally the prototype has been tested and its performance is analysed under normal conditions. KeywordPiezoelectric plate, MSP430G2231, ambient vibrations, wireless sensor node, capacitance, energy harvesting.