Next Article in Journal
Efficient Convex Optimization for Energy-Based Acoustic Sensor Self-Localization and Source Localization in Sensor Networks
Next Article in Special Issue
Energy-Aware RFID Anti-Collision Protocol
Previous Article in Journal
Analyzing Cyber-Physical Threats on Robotic Platforms
Previous Article in Special Issue
An Ultra-Low-Power RFID/NFC Frontend IC Using 0.18 μm CMOS Technology for Passive Tag Applications
Article Menu
Issue 5 (May) cover image

Export Article

Open AccessArticle

A Novel Displacement and Tilt Detection Method Using Passive UHF RFID Technology

1
School of Computer Science & Engineering, South China University of Technology, Guangzhou 510006, China
2
School of Electronic & Information, South China University of Technology, Guangzhou 510641, China
3
School of Information Engineering, Guangdong University of Technology, Guangzhou 510006, China
*
Author to whom correspondence should be addressed.
Sensors 2018, 18(5), 1644; https://doi.org/10.3390/s18051644
Received: 26 April 2018 / Revised: 17 May 2018 / Accepted: 18 May 2018 / Published: 21 May 2018
(This article belongs to the Special Issue RFID-Based Sensors for IoT Applications)
  |  
PDF [2875 KB, uploaded 21 May 2018]
  |  

Abstract

The displacement and tilt angle of an object are useful information for wireless monitoring applications. In this paper, a low-cost detection method based on passive radio frequency identification (RFID) technology is proposed. This method uses a standard ultrahigh-frequency (UHF) RFID reader to measure the phase variation of the tag response and detect the displacement and tilt angle of RFID tags attached to the targeted object. An accurate displacement result can be detected by the RFID system with a linearly polarized (LP) reader antenna. Based on the displacement results, an accurate tilt angle can also be detected by the RFID system with a circularly polarized (CP) reader antenna, which has been proved to have a linear relationship with the phase parameter of the tag’s backscattered wave. As far as accuracy is concerned, the mean absolute error (MAE) of displacement is less than 2 mm and the MAE of the tilt angle is less than 2.5° for an RFID system with 500 mm working range. View Full-Text
Keywords: displacement; tilt angle; ultrahigh frequency (UHF); radio frequency identification (RFID); antenna polarization displacement; tilt angle; ultrahigh frequency (UHF); radio frequency identification (RFID); antenna polarization
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
SciFeed

Share & Cite This Article

MDPI and ACS Style

Lai, X.; Cai, Z.; Xie, Z.; Zhu, H. A Novel Displacement and Tilt Detection Method Using Passive UHF RFID Technology. Sensors 2018, 18, 1644.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Sensors EISSN 1424-8220 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top