Wireless Sensor Network Using Multisource Harvesting System

A Wireless Sensor Node is not only used to collect the sensed information like temperature, humidity, pressure of remotely placed node but also communicate with other nodes in the network. To recharge these nodes, secondary batteries are employed. But persistently recharging this batteries and substitute of these discharged batteries gives heavy load on the network. Energy harvesting from the renewable sources can solve this problem. Energy harvesting is process of drawn out the energy from the sustainable sources which is then converted to electricity. But due to environmental restriction energy obtained from single source may not be efficient. Difficulty occurs with solar panel is if the sensors are established inside room or if there is lack of sun exposure and with wind generators is that they are too large,bulky and are costly if the size has to be reduced. Hence proposed system is designed to provide hybrid power supply to wireless sensor node which could stay charged by generating self-power.