Duty-Cycle Power Manager for Thermal-Powered Wireless Sensor Networks
Résumé
Exploiting energy from the environment to extend the system lifetime of Wireless Sensor Network (WSN), especially thermal energy, is considered as a promising approach. When considering self-powered systems, the Power Manager (PM) plays an important role in energy harvesting WSNs. Instead of minimizing the consumed energy as in the case of battery-powered systems, it causes the harvesting node to converge to Energy Neutral Operation (ENO) in order to achieve a theoretically infinite lifetime. In this paper, a low complexity PM for a thermal-powered WSN is presented. Our PM adapts the duty cycle of the node according to the estimation of harvested energy and the consumed energy provided by a simple energy monitor for a super capacitor based WSN to achieve the ENO. Experiments are performed on a real WSN platform where harvested energy is extracted from the wasted heat of a PC adapter by two thermoelectric generators.
Mots clés
PC adapter
thermoelectric generators
Wireless sensor networks
Monitoring
Wireless communication
Capacitors
Energy harvesting
Transmitters
Complexity theory
low complexity PM
energy neutral operation
ENO
supercapacitors
battery-powered systems
self-powered systems
thermal energy
thermal-powered wireless sensor networks
duty-cycle power manager
thermoelectric conversion
energy monitor
super capacitor based WSN