Lv Wen, Zhang Yongwei, Luo Hanyu, Xu Qingda, Quan Wenjing, Yang Jianhua, Zeng Min, Hu Nantao, Yang Zhi
Key Laboratory of Thin Film and Microfabrication (Ministry of Education), Department of Micro/Nano Electronics, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. China.
ACS Sens. 2023 Dec 22;8(12):4531-4541. doi: 10.1021/acssensors.3c01200. Epub 2023 Nov 25.
Inductor-capacitor wireless integrated sensors (LCWISs) featuring untethered and multitarget measurements are promising in health monitoring and human-machine interfaces. However, the lack of a profound understanding of the internal interference hinders the design of the LCWIS, which has a wide remote sensing range and high accuracy. Herein, a mutually exclusive effect of the mutual inductance interferences in LCWIS was revealed and quantified, enabling a design with a wide range of remote sensing (working distance comparable to the single-target device, working radius: 4 mm) and 16% reduced area. As a key to accurate multitarget measurement, a quantified target interference model based on interference decomposition was proposed to understand the target interferences, providing profound guidance for the design of ultra-accurate LCWIS. As a proof, we designed a cellulose-polyacrylate-cellulose LCWIS (CPC-LCWIS) with ultrahigh accuracies (∼1.2% RH and ∼0.18 °C) beyond commercial wired gauges. The CPC-LCWIS with full-coil sensing structures achieved exceptionally high sensitivities (0.36 MHz/°C and 0.25 MHz/% RH). The CPC-LCWIS was validated for health monitoring and human-machine interfaces. The concept studied in this work provides profound guidance for designing a high-performance flexible LCWIS for advanced wearable electronics.
具有无束缚和多目标测量功能的电感 - 电容无线集成传感器（LCWIS）在健康监测和人机界面方面具有广阔前景。然而，由于对内部干扰缺乏深入了解，阻碍了具有宽遥感范围和高精度的LCWIS的设计。在此，揭示并量化了LCWIS中互感干扰的互斥效应，实现了具有宽遥感范围（工作距离与单目标设备相当，工作半径：4毫米）且面积减小16%的设计。作为精确多目标测量的关键，提出了一种基于干扰分解的量化目标干扰模型来理解目标干扰，为超高精度LCWIS的设计提供了深刻指导。作为验证，我们设计了一种纤维素 - 聚丙烯酸酯 - 纤维素LCWIS（CPC - LCWIS），其具有超越商用有线仪表的超高精度（约1.2%RH和约0.18°C）。具有全线圈传感结构的CPC - LCWIS实现了极高的灵敏度（0.36 MHz/°C和0.25 MHz/%RH）。CPC - LCWIS在健康监测和人机界面方面得到了验证。本工作中研究的概念为设计用于先进可穿戴电子设备的高性能柔性LCWIS提供了深刻指导。
