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Title:Unobtrusive monitoring of human vital functions based on speckle interferometry with plastic optical fiber
Authors:ID Podbreznik, Peter (Author)
ID Đonlagić, Denis (Author)
ID Lešnik, Dejan (Author)
ID Cigale, Boris (Author)
ID Zazula, Damjan (Author)
Files:URL http://www.laserandhealthacademy.com/en/journal/?id=1425&type=1
Work type:Not categorized
Typology:1.01 - Original Scientific Article
Organization:FGPA - Faculty of Civil Engineering, Transportation Engineering and Architecture
Abstract:In this paper, a speckle interferometer with a plastic optical fiber system is reported for unobtrusive monitoring of heartbeat and respiration. The sensor consists of a laser diode butt-coupled to the plastic optical fiber, whose exit face projects speckle patterns onto a linear optical sensor array, which leads to a simple and cost-effective construction. Speckle images are acquired in a sequence and transformed into a 1D signal by using a phase-shifting method. Band-pass filtering and Morlet-wavelet-based multiresolutional approaches were used to analyze signals for the detection of cardiac and respiratory activities, respectively. Ten young, healthy persons participated in system testing, by lying supine on a mattress with embedded plastic optical fiber. Experimental results show the proposed system and detection algorithms are highly efficient. Sensitivities of 99.4 0.6% and 95.3 3%, precisions of 98.8 1.5% and 97.9 2.3%, and mean delays between interferometric detections and corresponding referential signals of 116.6 55.5ms and 1299.2 437.3 ms were computed for heartbeat and respiration, respectively.
Keywords:plastic optical fiber, speckle interferometry, unobtrusive monitoring, heartbeat detection, respiration detection, phase-shift method, wavelet transform
Year of publishing:2013
Number of pages:str. 68-72
Numbering:Vol. 2013, no. 1
PID:20.500.12556/DKUM-50442 New window
ISSN on article:1855-9913
COBISS.SI-ID:17034006 New window
Publication date in DKUM:10.07.2015
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Publisher:LAHA, Laser and Health Academy
COBISS.SI-ID:253097728 New window


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