アクティブRFID タグの電源における熱電変換素子を用いたバッテリレス駆動方式の有効性に関する検討

概要

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Conventional Active-RFID tags are driven by Li-ion batteries, which should be replaced with new ones before exhausted. Thermomodules enables thermal to electric energy conversion and it is paid attention as an energy harvesting technology. In this paper, a battery-less drive system using thermomodules is proposed and itsusefulness is proved by an experiment and thermal simulation based on meteorological data. The experiment confirmed that the present battery-less drive system is able to drive Active-RFID tags using even onethermomodule activated by a temperature difference of 6.4 [℃]. The simulation based on a meteorological data proved that the temperature difference 6.4 [℃] can be realized in all the area of Japan for eight months, namely 67[%] of one year. It is concluded that the present battery-less drive system is useful as a power sourcefor Active-RFID tags.