一种具有能量强度自适应管理算法的紧凑型射频能量收集无线传感器节点。

A Compact RF Energy Harvesting Wireless Sensor Node with an Energy Intensity Adaptive Management Algorithm.

作者信息

Liu Xiaoqiang, Li Mingxue, Chen Xinkai, Zhao Yiheng, Xiao Liyi, Zhang Yufeng

机构信息

School of Aeronautics, Harbin Institute of Technology, Harbin 150001, China.

出版信息

Sensors (Basel). 2023 Oct 23;23(20):8641. doi: 10.3390/s23208641.

DOI:10.3390/s23208641

PMID:37896734

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10610883/

Abstract

This paper presents a compact RF energy harvesting wireless sensor node with the antenna, rectifier, energy management circuits, and load integrated on a single printed circuit board and a total size of 53 mm × 59.77 mm × 4.5 mm. By etching rectangular slots in the radiation patch, the antenna area is reduced by 13.9%. The antenna is tested to have an S11 of -24.9 dB at 2.437 GHz and a maximum gain of 4.8 dBi. The rectifier has a maximum RF-to-DC conversion efficiency of 52.53% at 7 dBm input energy. The proposed WSN can achieve self-powered operation at a distance of 13.4 m from the transmitter source. To enhance the conversion efficiency under different input energy densities, this paper establishes an energy model for two operating modes and proposes an energy-intensity adaptive management algorithm. The experiments demonstrated that the proposed WSN can effectively distinguish between the two operating modes based on input energy intensity and realize efficient energy management.

摘要

本文介绍了一种紧凑型射频能量收集无线传感器节点，其天线、整流器、能量管理电路和负载集成在一块印刷电路板上，总尺寸为53毫米×59.77毫米×4.5毫米。通过在辐射贴片上蚀刻矩形槽，天线面积减少了13.9%。经测试，该天线在2.437吉赫兹时的S11为-24.9分贝，最大增益为4.8 dBi。整流器在7分贝毫瓦输入能量下的最大射频到直流转换效率为52.53%。所提出的无线传感器节点在距发射源13.4米的距离处可实现自供电运行。为了提高在不同输入能量密度下的转换效率，本文建立了两种工作模式的能量模型，并提出了一种能量强度自适应管理算法。实验表明，所提出的无线传感器节点能够根据输入能量强度有效区分两种工作模式，并实现高效的能量管理。