Battery-free flexible wireless sensors using tuning circuit for high-precision detection of dual-mode dynamic ranges

Yixuan Wang, Zhongming Chen, Tianci Huang, Junyi Ren, Junling Zhang, Zuqing Yuan*, Guozhen Shen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Tracking the dynamic range of properties in objects plays a crucial role in intelligent systems. However, complexity and discrete circuitry continue to pose significant challenges in achieving miniaturized integration and high-precision detection. Inspired by RFID tags, we introduce a flexible passive wireless sensor that detects pressure and temperature parameters of the contact object. The sensor features inductor-capacitor-resistance changes based on concentric fiber-membrane components for precisely decoupling frequency and amplitude shifts by tuning a resonant circuit, which enables a sensing performance for 600 kPa and 67 °C with distinguishing a pressure limit of 1 Pa and a temperature limit of 0.1 °C. The sensor can be paired with a portable vector network analyzer for wireless electrical signal monitoring, thus illustrating the broad utility. This design strategy enables potential applications in smart human-machine interfaces and personal health monitoring.

Original languageEnglish
Article number110492
JournalNano Energy
Volume133
DOIs
Publication statusPublished - Jan 2025

Keywords

  • Battery-free
  • Dual-mode
  • Flexible sensor
  • Tuning circuit
  • Wireless

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Wang, Y., Chen, Z., Huang, T., Ren, J., Zhang, J., Yuan, Z., & Shen, G. (2025). Battery-free flexible wireless sensors using tuning circuit for high-precision detection of dual-mode dynamic ranges. Nano Energy, 133, Article 110492. https://doi.org/10.1016/j.nanoen.2024.110492