Wireless Design of a Multisensor System for Physical Activity Monitoring

Real-time monitoring of human physical activity (PA) is important for assessing the intensity of activity and exposure to environmental pollutions. A wireless wearable multisenor integrated measurement system (WIMS) has been designed for real-time measurement of the energy expenditure and breathing...

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Published inIEEE transactions on biomedical engineering Vol. 59; no. 11; pp. 3230 - 3237
Main Authors Mo, Lingfei, Liu, Shaopeng, Gao, Robert X., John, Dinesh, Staudenmayer, John W., Freedson, Patty S.
Format Journal Article
LanguageEnglish
Published United States IEEE 01.11.2012
Subjects
Activities of Daily Living
Adult
Algorithms
Data synchronization
Electronics, Medical - instrumentation
energy efficiency
Equipment Design
Female
Humans
Male
Monitoring, Ambulatory - instrumentation
Monitoring, Ambulatory - methods
Movement - physiology
physical activity (PA) monitoring
Protocols
Sensors
Signal Processing, Computer-Assisted
Synchronization
Telemetry - instrumentation
Telemetry - methods
Tin
Wireless communication
Wireless sensor networks
Wireless Technology - instrumentation
Zigbee
Online AccessGet full text
ISSN0018-9294
1558-2531
1558-2531
DOI10.1109/TBME.2012.2208458

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Abstract Real-time monitoring of human physical activity (PA) is important for assessing the intensity of activity and exposure to environmental pollutions. A wireless wearable multisenor integrated measurement system (WIMS) has been designed for real-time measurement of the energy expenditure and breathing volume of human subjects under free-living conditions. To address challenges posted by the limited battery life and data synchronization requirement among multiple sensors in the system, the ZigBee communication platform has been explored for energy-efficient design. Two algorithms have been developed (multiData packaging and slot-data-synchronization) and coded into a microcontroller (MCU)-based sensor circuitry for real-time control of wireless data communication. Experiments have shown that the design enables continued operation of the wearable system for up to 68 h, with the maximum error for data synchronization among the various sensor nodes (SNs) being less than 24 ms. Experiment under free-living conditions have shown that the WIMS is able to correctly recognize the activity intensity level 86% of the time. The results demonstrate the effectiveness of the energy-efficient wireless design for human PA monitoring.
AbstractList Real-time monitoring of human physical activity (PA) is important for assessing the intensity of activity and exposure to environmental pollutions. A wireless wearable multisenor integrated measurement system (WIMS) has been designed for real-time measurement of the energy expenditure and breathing volume of human subjects under free-living conditions. To address challenges posted by the limited battery life and data synchronization requirement among multiple sensors in the system, the ZigBee communication platform has been explored for energy-efficient design. Two algorithms have been developed (multiData packaging and slot-data-synchronization) and coded into a microcontroller (MCU)-based sensor circuitry for real-time control of wireless data communication. Experiments have shown that the design enables continued operation of the wearable system for up to 68 h, with the maximum error for data synchronization among the various sensor nodes (SNs) being less than 24 ms. Experiment under free-living conditions have shown that the WIMS is able to correctly recognize the activity intensity level 86% of the time. The results demonstrate the effectiveness of the energy-efficient wireless design for human PA monitoring.Real-time monitoring of human physical activity (PA) is important for assessing the intensity of activity and exposure to environmental pollutions. A wireless wearable multisenor integrated measurement system (WIMS) has been designed for real-time measurement of the energy expenditure and breathing volume of human subjects under free-living conditions. To address challenges posted by the limited battery life and data synchronization requirement among multiple sensors in the system, the ZigBee communication platform has been explored for energy-efficient design. Two algorithms have been developed (multiData packaging and slot-data-synchronization) and coded into a microcontroller (MCU)-based sensor circuitry for real-time control of wireless data communication. Experiments have shown that the design enables continued operation of the wearable system for up to 68 h, with the maximum error for data synchronization among the various sensor nodes (SNs) being less than 24 ms. Experiment under free-living conditions have shown that the WIMS is able to correctly recognize the activity intensity level 86% of the time. The results demonstrate the effectiveness of the energy-efficient wireless design for human PA monitoring.
Real-time monitoring of human physical activity (PA) is important for assessing the intensity of activity and exposure to environmental pollutions. A wireless wearable multisenor integrated measurement system (WIMS) has been designed for real-time measurement of the energy expenditure and breathing volume of human subjects under free-living conditions. To address challenges posted by the limited battery life and data synchronization requirement among multiple sensors in the system, the ZigBee communication platform has been explored for energy-efficient design. Two algorithms have been developed (multiData packaging and slot-data-synchronization) and coded into a microcontroller (MCU)-based sensor circuitry for real-time control of wireless data communication. Experiments have shown that the design enables continued operation of the wearable system for up to 68 h, with the maximum error for data synchronization among the various sensor nodes (SNs) being less than 24 ms. Experiment under free-living conditions have shown that the WIMS is able to correctly recognize the activity intensity level 86% of the time. The results demonstrate the effectiveness of the energy-efficient wireless design for human PA monitoring.
Author John, Dinesh
Mo, Lingfei
Gao, Robert X.
Staudenmayer, John W.
Liu, Shaopeng
Freedson, Patty S.
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SubjectTerms Activities of Daily Living
Adult
Algorithms
Data synchronization
Electronics, Medical - instrumentation
energy efficiency
Equipment Design
Female
Humans
Male
Monitoring, Ambulatory - instrumentation
Monitoring, Ambulatory - methods
Movement - physiology
physical activity (PA) monitoring
Protocols
Sensors
Signal Processing, Computer-Assisted
Synchronization
Telemetry - instrumentation
Telemetry - methods
Tin
Wireless communication
Wireless sensor networks
Wireless Technology - instrumentation
Zigbee
Title Wireless Design of a Multisensor System for Physical Activity Monitoring
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