Estimation of Diaper Condition Based on Antenna Impedance Variation Through Rational Function Approximation

Real-time monitoring of a diaper is a key component in preventing skin rashes and skin eruption in babies. In this paper, we investigate the feasibility of sensing the urine and feces of a baby on a diaper using the input impedance variation of a single on-diaper antenna. As an RF transmitter requir...

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Bibliographic Details
Main Authors:	Manroop Turna, Yang Li, Youngwook Kim
Format:	Article
Language:	English
Published:	IEEE 2020-01-01
Series:	IEEE Access
Subjects:	Antenna impedance variation micro-strip antenna near-field perturbation pole model smart diaper
Online Access:	https://ieeexplore.ieee.org/document/8943223/

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spelling	doaj-a247ddde3bcf4b83b48bd96116f182b12021-03-30T01:11:56ZengIEEEIEEE Access2169-35362020-01-0182441244610.1109/ACCESS.2019.29621868943223Estimation of Diaper Condition Based on Antenna Impedance Variation Through Rational Function ApproximationManroop Turna0https://orcid.org/0000-0002-2358-100XYang Li1https://orcid.org/0000-0001-5169-8638Youngwook Kim2https://orcid.org/0000-0002-4067-6254Electrical and Computer Engineering Department, California State University, Fresno, CA, USAElectrical and Computer Engineering Department, Baylor University, Waco, TX, USAElectrical and Computer Engineering Department, California State University, Fresno, CA, USAReal-time monitoring of a diaper is a key component in preventing skin rashes and skin eruption in babies. In this paper, we investigate the feasibility of sensing the urine and feces of a baby on a diaper using the input impedance variation of a single on-diaper antenna. As an RF transmitter requires an antenna by default, other sensors are not needed if the antenna also serves as a sensor. We designed a microstrip dipole antenna and located it on a diaper. When a change of medium properties around the antenna occurs due to the presence of urine or feces, the near field is perturbed, causing a variation in antenna impedance. We simulated and measured antenna impedance under diverse diaper conditions. Results showed significant impedance variation depending on diaper condition. The impedance is approximated as a rational function and the diaper condition is classified through investigating the parameter of the rational function.https://ieeexplore.ieee.org/document/8943223/Antenna impedance variationmicro-strip antennanear-field perturbationpole modelsmart diaper
collection	DOAJ
language	English
format	Article
sources	DOAJ
author	Manroop Turna Yang Li Youngwook Kim
spellingShingle	Manroop Turna Yang Li Youngwook Kim Estimation of Diaper Condition Based on Antenna Impedance Variation Through Rational Function Approximation IEEE Access Antenna impedance variation micro-strip antenna near-field perturbation pole model smart diaper
author_facet	Manroop Turna Yang Li Youngwook Kim
author_sort	Manroop Turna
title	Estimation of Diaper Condition Based on Antenna Impedance Variation Through Rational Function Approximation
title_short	Estimation of Diaper Condition Based on Antenna Impedance Variation Through Rational Function Approximation
title_full	Estimation of Diaper Condition Based on Antenna Impedance Variation Through Rational Function Approximation
title_fullStr	Estimation of Diaper Condition Based on Antenna Impedance Variation Through Rational Function Approximation
title_full_unstemmed	Estimation of Diaper Condition Based on Antenna Impedance Variation Through Rational Function Approximation
title_sort	estimation of diaper condition based on antenna impedance variation through rational function approximation
publisher	IEEE
series	IEEE Access
issn	2169-3536
publishDate	2020-01-01
description	Real-time monitoring of a diaper is a key component in preventing skin rashes and skin eruption in babies. In this paper, we investigate the feasibility of sensing the urine and feces of a baby on a diaper using the input impedance variation of a single on-diaper antenna. As an RF transmitter requires an antenna by default, other sensors are not needed if the antenna also serves as a sensor. We designed a microstrip dipole antenna and located it on a diaper. When a change of medium properties around the antenna occurs due to the presence of urine or feces, the near field is perturbed, causing a variation in antenna impedance. We simulated and measured antenna impedance under diverse diaper conditions. Results showed significant impedance variation depending on diaper condition. The impedance is approximated as a rational function and the diaper condition is classified through investigating the parameter of the rational function.
topic	Antenna impedance variation micro-strip antenna near-field perturbation pole model smart diaper
url	https://ieeexplore.ieee.org/document/8943223/
work_keys_str_mv	AT manroopturna estimationofdiaperconditionbasedonantennaimpedancevariationthroughrationalfunctionapproximation AT yangli estimationofdiaperconditionbasedonantennaimpedancevariationthroughrationalfunctionapproximation AT youngwookkim estimationofdiaperconditionbasedonantennaimpedancevariationthroughrationalfunctionapproximation
_version_	1724187513284722688

Estimation of Diaper Condition Based on Antenna Impedance Variation Through Rational Function Approximation

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