基于接口电路特性的动能供能物联网节点优化设计  

Optimized Design of Vibration Powered IoT Node Based on Characteristics of Different Interface Circuits

作　　者：汤鸿 李鑫 梁俊睿[1] TANG Hong;LI Xin;LIANG Junrui(School of Information Science and Technology,ShanghaiTech University,Shanghai 201210,China;Shanghai Institute of Microsystemand Information Technology,Chinese Academy of Sciences,Shanghai 200050,China;China University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]上海科技大学信息科学与技术学院,上海201210 [2]中国科学院大学上海微系统与信息技术研究所,上海200050 [3]中国科学院大学,北京100049

出　　处：《传感技术学报》2021年第7期961-967,共7页Chinese Journal of Sensors and Actuators

基　　金：国家自然科学基金项目(61401277)。

摘　　要：根据压电能量收集技术中不同接口电路的特点,提出合理选用接口电路来优化具有不同冷启动电压的动能供能物联网节点的方法,并进行了实验验证。在实验1中,在加速度为9.02 m/s^(2)频率12.5 Hz正弦振动下,采用不同接口电路对10μF和100μF电容充电。当电压低于6.607 V和6.077 V时,使用同步电荷提取电路(SECE)充电最快,而后皆为使用同步开关电感收集电路(SSHI)充电最快。在实验2中,使用不同的接口电路为定制物联网节点供电,测试节点启动时间和运行鲁棒性。结果表明使用SECE电路,相比于SSHI和标准能量收集(SEH)电路,节点启动时间缩短13.1%和17.8%。并且使SECE电路时,物联网节点的鲁棒性好于使用SEH时。此研究不仅实现了动能供能的物联网节点,并利用合适的接口电路优化了其冷启动时间。Based on the characteristics of different interface circuits in the piezoelectric energy harvesting technology, an optimized design of vibration-powered IoT nodes is proposed and evaluated via experiments. In the first experiment, when the acceleration of vibration is 9.02 m/s^(2) and the frequency is 12.5 Hz, different interface circuits are used to charge 10 μF and 100 μF capacitors. The result shows that the charging speed of the synchronous electric charge extraction(SECE)circuit is the fastest when the capacitor voltage is lower than 6.607 V and 6.077 V. When the capacitor voltage is larger, the synchronized switching harvesting on inductor(SSHI)circuit has the fastest charging speed. In the second experiment, different interface circuits are used to power a customized IoT node to test the cold-start time and operation robustness. The result shows that with the SECE circuit, the IoT node reduces the cold-start time by 13.1% and 17.8% compared with the SSHI circuit and the standard energy harvesting(SEH)one. Furthermore, with the SECE circuit, the IoT node operates more robustly than with the SEH one. In this study, a vibration-powered IoT node is implemented. Moreover, its cold-start time is improved by selecting a suitable interface circuit.

关 键 词：物联网 压电能量收集 无线传感器节点 接口电路 自供能节点 

分 类 号：TP274[自动化与计算机技术—检测技术与自动化装置] TP393.1[自动化与计算机技术—控制科学与工程]