Thermo-electric Energy Harvesting Powered IoT System Design and Energy Model Analysis

2019 IEEE 13th International Conference on Anti-counterfeiting, Security, and Identification (ASID) Pub Date : 2019-10-01 DOI:10.1109/ICASID.2019.8925180

Wensi Wang, Xuanchong Chen, Yun Liu, X. Wang, Zhansheng Liu

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引用次数: 7

Abstract

Power consumption of micro-controllers and sensor systems have been greatly reduced in the last decade, new power supply method such as energy harvesting is now an alternative method to power Internet of things (IoT) devices. A few square centimeters sized thermo-electric generators (TEGs) can convert a few degrees Celsius temperature gradients into milli-watts of electric power. This paper presents the design of a TEG energy harvesting powered LoRa IoT device. The power management circuits design, super-capacitor energy storage unit and the IoT low power algorithm are introduced. The system demonstrated the TEG power generation of 0.4-12 mW, IoT device current consumption of 79 mA in data transmission mode, less than 50 μA in sleep mode. With super-capacitor energy storage unit, the IoT device can be powered entirely from thermo-electric energy without batteries. In addition to the system implementation, a comprehensive simulation model is created to optimize the form factor of TEG, selection of the super-capacitor and the operation duty cycles of IoT devices.

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热电能量收集驱动的物联网系统设计与能量模型分析

在过去的十年中，微控制器和传感器系统的功耗大大降低，新的供电方法(如能量收集)现在是为物联网(IoT)设备供电的另一种方法。几平方厘米大小的热电发电机(teg)可以将几摄氏度的温度梯度转换成毫瓦的电力。本文介绍了一种TEG能量收集供电的LoRa物联网设备的设计。介绍了电源管理电路设计、超级电容储能单元和物联网低功耗算法。该系统的TEG发电量为0.4-12 mW，数据传输模式下物联网设备电流消耗为79 mA，睡眠模式下电流消耗小于50 μA。通过超级电容器储能单元，物联网设备可以完全使用热电能量供电，而无需电池。除了系统实现之外，还建立了一个全面的仿真模型，以优化TEG的外形因素，超级电容器的选择和物联网设备的工作占空比。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

2019 IEEE 13th International Conference on Anti-counterfeiting, Security, and Identification (ASID)

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