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http://dx.doi.org/10.7840/KICS.2012.37.6B.423

A Solar Cell based Power Production and Supply Complying with the Active and Sleep Modes of Sensor MAC Protocols  

Lee, Seung-Yong (울산대학교 UbiCom 연구실)
Lee, Woong (울산대학교 UbiCom 연구실)
Oh, Hoon (울산대학교 UbiCom 연구실)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.37, no.6B, 2012 , pp. 423-432 More about this Journal
Abstract
We design a control circuit that can switch input power between a rechargeable battery and a sensor communication device (mote) depending on the operating state of a solar cell as well as the active and sleep mode of a sensor MAC protocol. A mote that simply combines a solarcell and a rechargeable battery may die if there is not sunlight long. A battery is recharged if sunlight is sufficient and a device is in a sleep mode, and it supplies power if sunlight is low and the mote is in an active mode. A mote can switch its input power between solar cell and battery depending on the output level of a solar cell. During this switching, a mote may lose its state information due to the reset of a microprocessor by the transient power-off. A capacitor is used to cope with this phenomenon and also supplies power to a mote during a sleep mode. Experimental results show that the solar cell based mote operates in a very stable manner against the lack of sunlight long.
Keywords
센서네트워크;에너지 생산;MAC 프로토콜;솔라셀;센서노드;
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