eprintid: 19398
rev_number: 2
eprint_status: archive
userid: 1
dir: disk0/00/01/93/98
datestamp: 2024-06-04 14:11:51
lastmod: 2024-06-04 14:11:51
status_changed: 2024-06-04 14:05:38
type: article
metadata_visibility: show
creators_name: Simic, M.
creators_name: Stavrakis, A.K.
creators_name: Radovanovic, M.
creators_name: Iqbal, A.
creators_name: Jeoti, V.
creators_name: Stojanovic, G.M.
title: A Portable Device for Passive LC Sensors Readout with Low-Coupling Enhanced Sensitivity
ispublished: pub
keywords: Electric inductors; Electric network analyzers; Electric power systems; Inductance; Laboratories; Numerical methods; Printed circuit boards; Resistors, Frequency measurements; Impedance; Inductive couplings; Inductor; LC sensor; Multiple measurements; Mutual inductance; Passive LC sensor; Resonance detection; Resonance frequencies, Natural frequencies
note: cited By 3
abstract: Passive sensors composed of inductor L and capacitor C (LC sensors) have significant importance for applications where reliable wireless monitoring of temperature, pressure, relative humidity, strain, and pH is needed. In this article, we propose a method suitable for implementation on the portable device for wireless readout of LC sensors, which eliminates the need for costly and bulky laboratory equipment (impedance analyzers and vector network analyzers). Our approach is based on an electrical circuit of voltage divider formed by a primary inductor and a reference resistor. The resonant frequency of the LC sensor is detected from the processing of the measured voltage across the reference resistor. The readout device is realized in the form of a printed circuit board (PCB) compatible with the widely available Arduino boards. Wireless readout of the ten LC tags with the proposed device and with the laboratory impedance analyzer, showed that, in frequency range 1-10 MHz, relative differences in estimated values are lower than 4. The distinguishing feature of the presented method is its enhanced sensitivity in the case of very weak coupling between primary and sensing inductor, which was achieved using numerical differentiation approximation of the measured voltage across the reference resistor. An additional contribution of the proposed device is demonstrated with the simultaneous readout of multiple tags. Finally, the proposed device was characterized with respect to the noise impact of the two power supply realizations (dc adapter and the battery). © 1963-2012 IEEE.
date: 2023
official_url: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85146233045&doi=10.1109%2fTIM.2022.3232089&partnerID=40&md5=0ef56c2e69f4f2e1b419e4129140a89a
id_number: 10.1109/TIM.2022.3232089
full_text_status: none
publication: IEEE Transactions on Instrumentation and Measurement
volume: 72
refereed: TRUE
citation:   Simic, M. and Stavrakis, A.K. and Radovanovic, M. and Iqbal, A. and Jeoti, V. and Stojanovic, G.M.  (2023) A Portable Device for Passive LC Sensors Readout with Low-Coupling Enhanced Sensitivity.  IEEE Transactions on Instrumentation and Measurement, 72.