振动俘能的自供电无线传感器节点设计  

Design of self-powered wireless sensor node for vibration energy-harvesting

作　　者：韦永祥 陈仲生 陈志文 杜思俊 WEI Yongxiang;CHEN Zhongsheng;CHEN Zhiwen;DU Sijun(College of Electrical and Information Engineering,Hunan University of Technology,Zhuzhou 417002,China;Department of Microelectronics,Delft University of Technology,Delft 2628CD,Netherlands)

机构地区：[1]湖南工业大学电气与信息工程学院,湖南株洲417002 [2]荷兰代尔夫特理工大学微电子系,荷兰代尔夫特2628CD

出　　处：《传感器与微系统》2023年第3期79-83,共5页Transducer and Microsystem Technologies

基　　金：国际自然科学基金资助项目(51911530202)。

摘　　要：振动俘能是实现无线传感器自供电的有效技术途径,但如何提高低频小幅振动下的电能转换与管理效率是一个难点,为此提出了电磁式振动俘能器和电能管理电路优化设计方法。首先,提出了一种双涡旋平面弹簧电磁式振动俘能器,并对其结构参数进行了有限元仿真分析与优化;然后,基于BQ25570芯片设计了一种电能管理电路,并针对无线传感器节点功耗需求对电路参数进行了优化;最后,设计了自供电无线温度传感器节点对振动俘能器及其电能管理电路进行实验测试。测试结果表明:在52 Hz和0.5 gn低频小幅振动激励下,振动俘能器最大开路电压为7.5 V,电能管理电路最大平均输出功率达到38 mW,工作频带为4 Hz左右,实现了无线温度传感器模块的自供电。Vibration energy-harvesting is an effective technical approach to realize self-powered supply of wireless sensors, but how to improve the efficiency of power conversion and management under low frequency and small amplitude vibration is a difficult point.In view of this, an optimization design method of electromagnetic vibration energy-harvester and power management circuit is proposed.Firstly, a double vortex plane spring electromagnetic vibration energy harvester is proposed, and its structural parameters are analyzed and optimized by finite element simulation.Then, a power management circuit is designed based on BQ25570 chip, and the circuit parameters are optimized according to the power consumption requirements of wireless sensor nodes.Finally, a self-powered wireless temperature sensor node is designed to test the vibration energy harvester and its power management circuit.The results show that the maximum open circuit voltage of the vibration energy harvester is 7.5 V,the maximum average output power of the power management circuit reaches 38 mW,and the working frequency band is about 4 Hz, under the low frequency and small vibration excitation of 52 Hz and 0.5 gn.Self-powered supply of wireless temperature sensor module is realized.

关 键 词：振动俘能 双涡旋平面弹簧 电能管理 自供电无线传感器 有限元仿真 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置] TH39[自动化与计算机技术—控制科学与工程]