环境电磁波能量采集 使用人体天线为可穿戴传感器
Dairoku Muramatsu1, Kazuki Amano1
1Department of Mechanical and Intelligent Systems Engineering, The University of Electro-Communications, 1-5-1 Chofugaoka, Chofu 182-8585, Japan.
Sensors (Basel, Switzerland)
|August 14, 2025
概括
使用人体天线 (HBA) 收集环境电磁波 (AEMW) 可以为可穿戴传感器提供动力. 这种方法为无需维护电池的健康监测设备提供了实用解决方案.
科学领域:
- 可穿戴技术是可穿戴的技术.
- 节能采集 节能采集 节能采集
- 生物医学工程 生物医学工程
背景情况:
- 可穿戴式传感器对于健康监测至关重要,但受到电池寿命的限制.
- 可穿戴设备的长期无维护运行是一个重大挑战.
- 现有的可穿戴设备的电源往往是重的或需要频繁的充电.
研究的目的:
- 为了研究环境电磁波 (AEMW) 能量收集,为可穿戴传感器提供动力.
- 设计和评估一个人体天线 (HBA),以实现高效的AEMW电源采集.
- 评估AEMW收获用于无维护电池的可穿戴设备的可行性.
主要方法:
- 在各种环境 (室内,室外,地下室) 中测量AEMW功率密度和频率分布.
- 设计和制造了一种灵活的HBA电路接口电极,用于宽带阻抗匹配.
- 将HBA性能与使用模拟AEMW源的传统鞭天线进行比较.
- 通过对特定吸收率 (SAR) 的数值分析来评估电磁安全性.
主要成果:
- 与鞭子天线相比,HBA表现出优越的性能,特别是在300 MHz以下.
- 在户外采集AEMW的估计功率为-31.9dBm (0.64μW).
- 收获的电力足以间歇运行低功耗传感器和蓝牙低能耗模块.
- 数字分析证实SAR水平远低于国际安全限值.
结论:
- 基于人体天线的AEMW能量采集是为可穿戴传感器提供动力的可行方法.
- 这项技术使可穿戴健康监测系统的实用,无需维护电池的操作成为可能.
- 这种方法既安全又高效,为下一代可穿戴电子产品铺平了道路.
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