Low Power RF Transceiver using Piezoelectric Vibration Energy Harvesting Technique for Wireless Sensor Node

摘要

In a wireless sensor network the sensor nodes are placed at remote location and they operate on batteries. The major issue in wireless sensor network is the power consumption of the sensor node. Even though the sensor nodes operate on batteries, the batteries are to be changed after specific time interval. The battery replacement is not a viable solution as it is costly and time consuming. So some alternative method for battery replacement is to be used. The ambient energy can be used to power up the sensor node. The technique of converting ambient energy into electrical energy is called energy harvesting. In this paper the piezoelectric vibration energy is used as energy harvesting technique. The technique generates electrical energy which is used in place of batteries for wireless sensor node. The hardware of the system consists of RF transceiver CC2500, microcontroller MSP 430, piezoelectric crystal and other components. Batteries are not required for the system. The system is maintenance free and coves a distance upto 300 ft. The current consumption is from few microampere to 20 mA from wakeup to transmission.