期刊
IEEE SENSORS JOURNAL
卷 21, 期 21, 页码 23889-23897出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JSEN.2021.3116457
关键词
Sensors; Frequency selective surfaces; Resonators; Resonant frequency; Sensor phenomena and characterization; Wireless sensor networks; Wireless communication; Displacement sensor; two-dimensional; high sensitivity; wireless sensor; graphene-based frequency selective surface
资金
- National Natural Science Foundation of China (NSFC) [61771360, U19A2055, 62071357, 62171348]
- Key Industry Chain Project of Shaanxi Province [2018ZDCXL-GY-08-03-01]
- Fundamental Research Funds for the Central Universities
- Innovation Fund of Xidian University
This paper presents a two-dimensional wireless displacement sensor with high sensitivity composed of a bilayer graphene-based frequency selective surface (FSS), which can achieve two-dimensional displacement sensing. Experimental results show high sensitivity in both x and y directions, and the excellent stability of graphene makes it suitable for harsh environments, showing promising prospects for applications.
In this paper, a two-dimensional wireless displacement sensor with high sensitivity composed of a bilayer graphene-based frequency selective surface (FSS) is proposed. The lengths of the strip-type resonators on the top and bottom layers of the FSS are different and perpendicular to each other. Based on the resonance and polarization characteristics of the FSS, two-dimensional displacement sensing can be realized. It is well validated both in simulation and experiment that the direction of the displacement can be distinguished by the variation trend of the resonant frequencies of the top and bottom layers. In experiment, the measured results of the FSS based wireless displacement sensor in the dynamic range of 5mm show high sensitivity of 280 MHz/mm in x direction and 370 MHz/mm in y direction. Moreover, the excellent mechanical and chemical stability of the multi-layer graphene also makes it suitable for harsh environments, showing good prospects in application.
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