《An AA-Sized Vibration-Based Microgenerator for Wireless Sensors》.pdf

P O W E R G E N E R A T I O N An AA-Sized Vibration- Based Microgenerator for Wireless Sensors This vibration-to-electrical transducer has an AA-size form factor and generates a DC voltage that can power off-the-shelf integrated circuits. hemical batteries power most mod- regulator, which are external to the MPG module, ern, portable electronic devices. Such apply regulated power to an application circuit batteries require replacement or after the MPG’s voltage output exceeds a preset Ccharging once consumed. So, nonex- threshold. haustive power sources would be We’ve used the MPG with the start-up circuit more convenient. One readily available option is and the regulator in a vibration-powered wire- vibration energy. Even though the power from less thermometer system, which can transmit miniature vibration-based generators is very small, temperature measurements every 20 seconds improvements in integrated circuit (IC) technol- when continuous vibrations with an input ogy have made miniaturized vibration-powered acceleration of 4.63 m/s2 and a frequency of systems feasible. Vibration-powered wireless sen- 70.5 Hz are present. We chose the combination sors obtain power from ma- of sto