文章基本信息

标题：Measurement of the electric energy storage capacity in solar thermoelectric generators’ energy harvesting modules
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作者：Pedro C Dias ; Flávio JO Morais ; Luis FC Duarte 等
期刊名称：International Journal of Distributed Sensor Networks
印刷版ISSN：1550-1329
电子版ISSN：1550-1477
出版年度：2017
卷号：13
期号：3
页码：1
DOI：10.1177/1550147716685423
出版社：Hindawi Publishing Corporation
摘要：Reducing energy consumption is mandatory in self-powered sensor nodes of wireless sensor networks that obtain all their energy from the environment. In this direction, one first step to optimize the network is to accurately measure the total energy harvested, which will determine the power available for sensor consumption. We present here a technique based on an embedded circuit with an ultra-low-power microcontroller to accurately measure the efficiency of flat-panel solar thermoelectric generators operating with environmental temperature gradients. Experimental tests showed that when a voltage of 180 mV (best case in an environmental flat-panel solar thermoelectric generators) is applied to the input of the DC–DC converter, the proposed technique eliminates a measurement error of 33% when compared with the conventional single supercapacitor strategy.
关键词：Energy harvesting; autonomous sensor networks; DC–DC converters; thermoelectric modules; energy measurement