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A system for monitoring breathing activity using an ultrasonic radar detection with low power consumption

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dc.contributor.authorAl Naji, A.
dc.contributor.authorAl Askery, A.J.
dc.contributor.authorGharghan, S.K.
dc.contributor.authorChahl, J.
dc.date.issued2019
dc.description.abstractContinuous monitoring of breathing activity plays a major role in detecting and classifying a breathing abnormality. This work aims to facilitate detection of abnormal breathing syndromes, including tachypnea, bradypnea, central apnea, and irregular breathing by tracking of thorax movement resulting from respiratory rhythms based on ultrasonic radar detection. This paper proposes a non-contact, non-invasive, low cost, low power consumption, portable, and precise system for simultaneous monitoring of normal and abnormal breathing activity in real-time using an ultrasonic PING sensor and microcontroller PIC18F452. Moreover, the obtained abnormal breathing syndrome is reported to the concerned physician’s mobile telephone through a global system for mobile communication (GSM) modem to handle the case depending on the patient's emergency condition. In addition, the power consumption of the proposed monitoring system is reduced via a duty cycle using an energy-efficient sleep/wake scheme. Experiments were conducted on 12 participants without any physical contact at different distances of 0.5, 1, 2, and 3 m and the breathing rates measured with the proposed system were then compared with those measured by a piezo respiratory belt transducer. The experimental results illustrate the feasibility of the proposed system to extract breathing rate and detect the related abnormal breathing syndromes with a high degree of agreement, strong correlation coefficient, and low error ratio. The results also showed that the total current consumption of the proposed monitoring system based on the sleep/wake scheme was 6.936 mA compared to 321.75 mA when the traditional operation was used instead.Consequently, this led to a 97.8% of power savings and extended the battery life time from 8 h to approximately 370 h. The proposed monitoring system could be used in both clinical and home settings.
dc.identifier.citationJournal of Sensor and Actuator Networks, 2019; 8(2):1-17
dc.identifier.doi10.3390/jsan8020032
dc.identifier.issn2224-2708
dc.identifier.issn2224-2708
dc.identifier.urihttps://hdl.handle.net/11541.2/137244
dc.language.isoen
dc.publisherMDPIAG
dc.rightsCopyright 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution(CC BY) license (http://creativecommons.org/licenses/by/4.0/)
dc.source.urihttps://doi.org/10.3390/jsan8020032
dc.subjectnon-contact monitoring system
dc.subjectbreathing abnormality
dc.subjecteupnea
dc.subjecttachypnea
dc.subjectbradypnea
dc.subjectcentral apnea
dc.subjectultrasonic (PING) sensor
dc.subjectmicrocontroller PIC18F452
dc.subjectglobal system for mobilecommunication (GSM)
dc.subjectpower consumption model
dc.titleA system for monitoring breathing activity using an ultrasonic radar detection with low power consumption
dc.typeJournal article
pubs.publication-statusPublished
ror.mmsid9916284676001831

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