Radio Frequency Identification Tag Based Flexible Angle Sensor for Dynamic Range Measurement

IF 1.2 4区工程技术 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC

Microwave and Optical Technology Letters Pub Date : 2025-07-17 DOI:10.1002/mop.70303

Xiao-Qing Yang, En-Kang Wu, Jun-Ge Liang

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引用次数: 0

Abstract

This paper presents a flexible radio frequency (RF) sensor for measuring rotational angle. The sensor consists of a nested rectangular spiral inductor and two rectangular capacitors to form a radio frequency identification tag, which utilizes inductive coupling with an antenna for data transmission. The sensor has a wide dynamic detection range, accurately measuring rotation angles from 0° to 180°. Specifically, within the range of 0°–30°, the sensor exhibits exceptionally high sensitivity with 4.95 MHz/° and 0.093 dB/°. In the range of 90°–180°, frequency overlap occurs, so we take full advantage of the multi-parameter characterization of RF devices and jointly characterize the angle using the resonant frequency and return loss. The results were then subjected to quadratic regression fitting, which showed a high degree of agreement with the test results. Experiments have validated the sensor's performance, showing good reusability and a fast response speed. Compared to traditional passive angle sensors, this sensor combines RF sensing technology with flexible materials. The designed flexible wireless angle sensor is recommended for human joint measurement.

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基于射频识别标签的柔性角度传感器动态范围测量

本文提出了一种用于测量旋转角度的柔性射频传感器。该传感器由嵌套的矩形螺旋电感和两个矩形电容组成射频识别标签，利用电感耦合与天线进行数据传输。该传感器具有较宽的动态检测范围，可精确测量0°至180°的旋转角度。具体而言，在0°-30°范围内，传感器具有4.95 MHz/°和0.093 dB/°的极高灵敏度。在90°-180°范围内，频率发生重叠，因此我们充分利用射频器件的多参数表征，利用谐振频率和回波损耗共同表征角度。然后对结果进行二次回归拟合，结果显示与测试结果高度一致。实验验证了该传感器的性能，具有良好的可重用性和快速的响应速度。与传统的无源角度传感器相比，该传感器将射频传感技术与柔性材料相结合。所设计的柔性无线角度传感器被推荐用于人体关节测量。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Microwave and Optical Technology Letters 工程技术-工程：电子与电气

CiteScore

3.40

自引率

20.00%

发文量

371

审稿时长

4.3 months

期刊介绍： Microwave and Optical Technology Letters provides quick publication (3 to 6 month turnaround) of the most recent findings and achievements in high frequency technology, from RF to optical spectrum. The journal publishes original short papers and letters on theoretical, applied, and system results in the following areas. - RF, Microwave, and Millimeter Waves - Antennas and Propagation - Submillimeter-Wave and Infrared Technology - Optical Engineering All papers are subject to peer review before publication