Seat occupancy detection based on a low-power microcontroller and a single FSR

This paper proposes a microcontroller-based measurement system to detect and confirm the presence of a subject in a chair. The system relies on a single Force Sensing Resistor (FSR), which is arranged in the seat of the chair, that undergoes a sudden resistance change when a subject/object is seated...

Descripción completa

Detalles Bibliográficos
Autores: Sifuentes, Ernesto, González Landaeta, Rafael, Cota Ruiz, Juan, Reverter Cubarsí, Ferran|||0000-0003-1653-0519
Tipo de recurso: artículo
Fecha de publicación:2019
País:España
Institución:Universitat Politècnica de Catalunya (UPC)
Repositorio:UPCommons. Portal del coneixement obert de la UPC
Idioma:inglés
OAI Identifier:oai:upcommons.upc.edu:2117/167704
Acceso en línea:https://hdl.handle.net/2117/167704
https://dx.doi.org/10.3390/s19030699
Access Level:acceso abierto
Palabra clave:Tactile sensors
Microcontrollers
Detectors--Design and construction
Autonomous sensor
Force sensing resistor
Microcontroller
Resistive sensor
Seat occupancy detection
Sensor interface electronics
Microcontroladors
Detectors
Àrees temàtiques de la UPC::Enginyeria electrònica
id ES_a74d1b0974ca10f217b60ce6f8eccec5
oai_identifier_str oai:upcommons.upc.edu:2117/167704
network_acronym_str ES
network_name_str España
repository_id_str
spelling Seat occupancy detection based on a low-power microcontroller and a single FSRSifuentes, ErnestoGonzález Landaeta, RafaelCota Ruiz, JuanReverter Cubarsí, Ferran|||0000-0003-1653-0519Tactile sensorsMicrocontrollersDetectors--Design and constructionAutonomous sensorForce sensing resistorMicrocontrollerResistive sensorSeat occupancy detectionSensor interface electronicsMicrocontroladorsDetectorsÀrees temàtiques de la UPC::Enginyeria electrònicaThis paper proposes a microcontroller-based measurement system to detect and confirm the presence of a subject in a chair. The system relies on a single Force Sensing Resistor (FSR), which is arranged in the seat of the chair, that undergoes a sudden resistance change when a subject/object is seated/placed over the chair. In order to distinguish between a subject and an inanimate object, the system also monitors small-signal variations of the FSR resistance caused by respiration. These resistance variations are then directly measured by a low-cost general-purpose microcontroller unit (MCU) without using either an analogue processing stage or an analogue-to-digital converter. Two versions of such a MCU-based circuit are presented: one to prove the concept of the measurement, and another with a smart wake-up (generated by the sudden resistance change) intended to reduce the energy consumption. The feasibility of the proposed measurement system is experimentally demonstrated with subjects of different weight sitting at different postures, and also with objects of different weight. The MCU-based circuit with a smart wake-up shows a standby current consumption of 800 nA, and requires an energy of 125 µJ to carry out the measurement after the wake-up.Peer ReviewedMultidisciplinary Digital Publishing Institute (MDPI)20192019-02-0820192019-08-26journal articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/2117/167704https://dx.doi.org/10.3390/s19030699reponame:UPCommons. Portal del coneixement obert de la UPCinstname:Universitat Politècnica de Catalunya (UPC)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2Attribution-NonCommercial-NoDerivs 3.0 Spainhttp://creativecommons.org/licenses/by-nc-nd/3.0/es/info:eu-repo/semantics/openAccessoai:upcommons.upc.edu:2117/1677042026-05-27T15:37:01Z
dc.title.none.fl_str_mv Seat occupancy detection based on a low-power microcontroller and a single FSR
title Seat occupancy detection based on a low-power microcontroller and a single FSR
spellingShingle Seat occupancy detection based on a low-power microcontroller and a single FSR
Sifuentes, Ernesto
Tactile sensors
Microcontrollers
Detectors--Design and construction
Autonomous sensor
Force sensing resistor
Microcontroller
Resistive sensor
Seat occupancy detection
Sensor interface electronics
Microcontroladors
Detectors
Àrees temàtiques de la UPC::Enginyeria electrònica
title_short Seat occupancy detection based on a low-power microcontroller and a single FSR
title_full Seat occupancy detection based on a low-power microcontroller and a single FSR
title_fullStr Seat occupancy detection based on a low-power microcontroller and a single FSR
title_full_unstemmed Seat occupancy detection based on a low-power microcontroller and a single FSR
title_sort Seat occupancy detection based on a low-power microcontroller and a single FSR
dc.creator.none.fl_str_mv Sifuentes, Ernesto
González Landaeta, Rafael
Cota Ruiz, Juan
Reverter Cubarsí, Ferran|||0000-0003-1653-0519
author Sifuentes, Ernesto
author_facet Sifuentes, Ernesto
González Landaeta, Rafael
Cota Ruiz, Juan
Reverter Cubarsí, Ferran|||0000-0003-1653-0519
author_role author
author2 González Landaeta, Rafael
Cota Ruiz, Juan
Reverter Cubarsí, Ferran|||0000-0003-1653-0519
author2_role author
author
author
dc.subject.none.fl_str_mv Tactile sensors
Microcontrollers
Detectors--Design and construction
Autonomous sensor
Force sensing resistor
Microcontroller
Resistive sensor
Seat occupancy detection
Sensor interface electronics
Microcontroladors
Detectors
Àrees temàtiques de la UPC::Enginyeria electrònica
topic Tactile sensors
Microcontrollers
Detectors--Design and construction
Autonomous sensor
Force sensing resistor
Microcontroller
Resistive sensor
Seat occupancy detection
Sensor interface electronics
Microcontroladors
Detectors
Àrees temàtiques de la UPC::Enginyeria electrònica
description This paper proposes a microcontroller-based measurement system to detect and confirm the presence of a subject in a chair. The system relies on a single Force Sensing Resistor (FSR), which is arranged in the seat of the chair, that undergoes a sudden resistance change when a subject/object is seated/placed over the chair. In order to distinguish between a subject and an inanimate object, the system also monitors small-signal variations of the FSR resistance caused by respiration. These resistance variations are then directly measured by a low-cost general-purpose microcontroller unit (MCU) without using either an analogue processing stage or an analogue-to-digital converter. Two versions of such a MCU-based circuit are presented: one to prove the concept of the measurement, and another with a smart wake-up (generated by the sudden resistance change) intended to reduce the energy consumption. The feasibility of the proposed measurement system is experimentally demonstrated with subjects of different weight sitting at different postures, and also with objects of different weight. The MCU-based circuit with a smart wake-up shows a standby current consumption of 800 nA, and requires an energy of 125 µJ to carry out the measurement after the wake-up.
publishDate 2019
dc.date.none.fl_str_mv 2019
2019-02-08
2019
2019-08-26
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
VoR
http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/2117/167704
https://dx.doi.org/10.3390/s19030699
url https://hdl.handle.net/2117/167704
https://dx.doi.org/10.3390/s19030699
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution-NonCommercial-NoDerivs 3.0 Spain
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution-NonCommercial-NoDerivs 3.0 Spain
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Multidisciplinary Digital Publishing Institute (MDPI)
publisher.none.fl_str_mv Multidisciplinary Digital Publishing Institute (MDPI)
dc.source.none.fl_str_mv reponame:UPCommons. Portal del coneixement obert de la UPC
instname:Universitat Politècnica de Catalunya (UPC)
instname_str Universitat Politècnica de Catalunya (UPC)
reponame_str UPCommons. Portal del coneixement obert de la UPC
collection UPCommons. Portal del coneixement obert de la UPC
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869415767358832640
score 15,300719

Similares en LA Referencia