Articles producció científica> Enginyeria Electrònica, Elèctrica i Automàtica

Battery-Less Smart Diaper Based on NFC Technology

  • Identification data

    Identifier: imarina:6013685
    Authors:
    Lazaro, AntonioBoada, MartiVillarino, RamonGirbau, David
    Abstract:
    Modern disposable diapers are carefully designed to transport fluid away from the skin to prevent irritation and dermatitis. These devices are used not only for babies. In fact, they are increasingly used for the elderly since both average life expectancy and the number of people who need special care are increasing. Diapers must be changed to prevent skin rash caused by the skin being exposed to wetness for a long time and to high the pH levels of urine. However, it is not easy to check the state of diapers (of babies or the elderly) without removing the baby's or the elderly's clothes. In this paper, we propose a smart diaper equipped with a battery-less near field communication (NFC) tag. Moisture is detected by changes in capacitance between two electrodes located on the back sheet of the diaper, while capacitance is determined from the charge time through a high-value resistor using a microcontroller. The change in capacitance as a function of the wet conditions is simulated and measured. The tag is based on an NFC IC with energy harvesting. The power required to feed the electronics and microcontroller is obtained from the magnetic field generated by a smartphone with NFC used as a reader. A simple model is proposed to estimate the volume of urine in the diaper. We compare this approach with others in the literature and study how the capacitance is affected by the body and the materials.
  • Others:

    Author, as appears in the article.: Lazaro, Antonio; Boada, Marti; Villarino, Ramon; Girbau, David;
    Department: Enginyeria Electrònica, Elèctrica i Automàtica
    URV's Author/s: Boada Navarro, Martí / Girbau Sala, David / Lázaro Guillén, Antonio Ramon / Villarino Villarino, Ramón Maria
    Keywords: Tag System Smart diaper Sensor Radiofrequency identification Ph Near field communications Moisture sensor Dielectric-properties Constant Capacitive sensors Biological tissues
    Abstract: Modern disposable diapers are carefully designed to transport fluid away from the skin to prevent irritation and dermatitis. These devices are used not only for babies. In fact, they are increasingly used for the elderly since both average life expectancy and the number of people who need special care are increasing. Diapers must be changed to prevent skin rash caused by the skin being exposed to wetness for a long time and to high the pH levels of urine. However, it is not easy to check the state of diapers (of babies or the elderly) without removing the baby's or the elderly's clothes. In this paper, we propose a smart diaper equipped with a battery-less near field communication (NFC) tag. Moisture is detected by changes in capacitance between two electrodes located on the back sheet of the diaper, while capacitance is determined from the charge time through a high-value resistor using a microcontroller. The change in capacitance as a function of the wet conditions is simulated and measured. The tag is based on an NFC IC with energy harvesting. The power required to feed the electronics and microcontroller is obtained from the magnetic field generated by a smartphone with NFC used as a reader. A simple model is proposed to estimate the volume of urine in the diaper. We compare this approach with others in the literature and study how the capacitance is affected by the body and the materials.
    Thematic Areas: Química Physics, applied Nutrição Medicina veterinaria Medicina ii Materiais Matemática / probabilidade e estatística Interdisciplinar Instruments & instrumentation Instrumentation Engineering, electrical & electronic Engenharias iv Engenharias iii Engenharias ii Engenharias i Electrical and electronic engineering Ciências biológicas ii Ciências biológicas i Ciência da computação Biotecnología Astronomia / física
    licence for use: https://creativecommons.org/licenses/by/3.0/es/
    ISSN: 1530437X
    Author's mail: antonioramon.lazaro@urv.cat david.girbau@urv.cat ramon.villarino@urv.cat
    Author identifier: 0000-0003-3160-5777 0000-0001-7995-5536 0000-0001-9692-8943
    Record's date: 2024-10-26
    Papper version: info:eu-repo/semantics/acceptedVersion
    Link to the original source: https://ieeexplore.ieee.org/document/8788548
    Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
    Papper original source: Ieee Sensors Journal. 19 (22): 10848-10858
    APA: Lazaro, Antonio; Boada, Marti; Villarino, Ramon; Girbau, David; (2019). Battery-Less Smart Diaper Based on NFC Technology. Ieee Sensors Journal, 19(22), 10848-10858. DOI: 10.1109/JSEN.2019.2933289
    Article's DOI: 10.1109/JSEN.2019.2933289
    Entity: Universitat Rovira i Virgili
    Journal publication year: 2019
    Publication Type: Journal Publications
  • Keywords:

    Electrical and Electronic Engineering,Engineering, Electrical & Electronic,Instrumentation,Instruments & Instrumentation,Physics, Applied
    Tag
    System
    Smart diaper
    Sensor
    Radiofrequency identification
    Ph
    Near field communications
    Moisture sensor
    Dielectric-properties
    Constant
    Capacitive sensors
    Biological tissues
    Química
    Physics, applied
    Nutrição
    Medicina veterinaria
    Medicina ii
    Materiais
    Matemática / probabilidade e estatística
    Interdisciplinar
    Instruments & instrumentation
    Instrumentation
    Engineering, electrical & electronic
    Engenharias iv
    Engenharias iii
    Engenharias ii
    Engenharias i
    Electrical and electronic engineering
    Ciências biológicas ii
    Ciências biológicas i
    Ciência da computação
    Biotecnología
    Astronomia / física
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