期刊
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
卷 68, 期 4, 页码 1598-1609出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TMTT.2019.2957369
关键词
Angular displacement sensor; asymmetric devices; directional rotation; electrically small resonators; microwave measurement technique; microwave sensors; rotation sensor
资金
- EDISOn-Electromagnetic Design of flexIbleSensOrs Project [POIR.04.04.00-00-1DC3/16-00]
- European Union under the European Regional Development Fund, Smart Growth Operational Programme
This article presents a technique based on a modified complementary split-ring resonator (CSRR) to detect angular displacement and direction of rotation with high resolution and sensitivity over a wide dynamic range. The proposed microwave planar sensor takes advantage of the asymmetry of the sensor geometry and measures the angle of rotation in terms of the change in the relative phase of the reflection coefficients. The sensor consists of a movable modified CSRR (the rotor) and a microstrip line with a circular defect in the ground plane (the stator). By selecting the substrate material and the rotor thickness, the sensor can be designed to work at different operating frequencies. A theoretical model of the sensor is proposed and is followed by a detailed numerical analysis involving equivalent circuit simulations, full-wave computations, and measurement results. Using positioning error estimation and air-gap analysis, a technique based on phase-change measurements is found to be better than those based on magnitude measurements alone. The maximum sensitivity for measuring the angular rotation is found to be a 4.3 degrees change in the relative phase of the reflection coefficient per 1 degrees of rotation. The sensor has an angular measurement range from -90 degrees to +90 degrees. The sensor-a stator fabricated on a 0.5-mm-thick Rogers RT5880 substrate and three rotors fabricated on a 1.5-mm-thick Rogers RT5880, a 1-mm-thick FR4, and a 0.5-mm-thick Rogers RT5880-can effectively detect the direction of rotation, measure the angle of rotation and angular velocity with reasonable accuracy.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据