Indoor Micro-light Energy Harvesting System for Low Power Wireless Sensor Node
نویسندگان
چکیده
Indoor micro-light energy harvesting is very challenging because of very low indoor light energy density and conversion efficiency. It is therefore important to optimize system design so an energy harvester can provide sufficient energy to the WSN in low illuminance levels. In this paper, we present a special power management system that includes maximum power point tracking (MPPT), energy storage circuit, hysteresis comparator and DC-DC boost converter. Photovoltaic cells characteristics, energy storage units, power management circuit design, and power consumption pattern of the target mote are presented. The measured prototype can successfully drive a wireless humiture sensor node load when the humiture sensor transmits signal.
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