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.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5981316 | PMC |
| http://dx.doi.org/10.3390/s18051644 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Modulation of the peak velocities and gains of abduction and adduction saccades according to head position.
Jpn J Ophthalmol
January 2025
Department of Neurology, Yokohama Brain and Spine Center, Yokohama, Japan.
Purpose: To assess the effects of modifying head position and of static ocular counter-rolling (OCR) on abduction and adduction in saccadic eye movements using a head-mounted video-oculographic device.
Study Design: A clinical observational study.
Methods: The peak velocities and amplitude gains of visually guided 12° saccades were binocularly measured in 21 healthy volunteers with their heads in the upright vertical (0°) and horizontal (± 90°, bilateral side-lying) postures, and in 6 participants with their head positions bilaterally tilted by 30°.
Wavelength-tunable infrared metasurfaces with chiral bound states in the continuum.
Sci Rep
January 2025
School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai, 200093, China.
In recent years, research on chiral bound states in the continuum (BIC) has surged, leading to the development of various chiral metasurfaces with narrow bandwidths by breaking of in-plane and out-of-plane symmetries. However, the ability to dynamically tune the working band remains relatively unexplored, which is valuable for chiral sensing applications. Optical phase-change materials, with tunable dielectric constants and switchable properties during phase transition, offer the potential for dynamic control of optical metasurfaces.
View Article and Find Full Text PDFA Novel Technique With Buttress Plating for Comminuted Base Fractures of the Proximal Phalanx.
Ann Plast Surg
December 2024
Department of Orthopaedic Surgery, Duson Hospital, Ansan, Korea.
Background: Extra-articular but severely comminuted distal basal fractures of the proximal phalanx (PP) are rarely reported. Therefore, the aim of this study was to achieve proper union and desirable outcomes using low-profile locking plates/screws. We introduced our own surgical approach and reported the clinical/radiographic outcomes via retrospective case series.
View Article and Find Full Text PDFSurface structure characterization of rubrene(001) single crystal with sum frequency generation spectroscopy and reflection high-energy electron diffraction.
J Chem Phys
January 2025
Department of Chemistry, University of Houston, Houston, Texas 77204, USA.
Rubrene is one of the leading organic semiconductors in scientific and industrial research, showing good conductivities and utilities in devices such as organic field-effect transistors. In these applications, the rubrene crystals often contact ionic liquids and other materials. Consequently, their surface properties and interfacial interactions influence the device's performance.
View Article and Find Full Text PDFSide-Chain and Ring-Size Effects on Permeability in Artificial Water Channels.
J Phys Chem B
January 2025
McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, Texas 78712, United States.
Artificial water channels (AWCs) have emerged as a promising framework for stable water permeation, with water transport rates comparable to aquaporins (3.4-40.3 × 10 HO/channel/s).
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!