| Title: | Unobtrusive monitoring of human vital functions based on speckle interferometry with plastic optical fiber |
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| Authors: | ID Podbreznik, Peter (Author)
ID Đonlagić, Denis (Author)
ID Lešnik, Dejan (Author)
ID Cigale, Boris (Author)
ID Zazula, Damjan (Author) |
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| Files: |  http://www.laserandhealthacademy.com/en/journal/?id=1425&type=1
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| Language: | English |
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| Work type: | Not categorized |
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| Typology: | 1.01 - Original Scientific Article |
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| Organization: | FGPA - Faculty of Civil Engineering, Transportation Engineering and Architecture
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| 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. |
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| Keywords: | plastic optical fiber, speckle interferometry, unobtrusive monitoring, heartbeat detection, respiration detection, phase-shift method, wavelet transform |
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| Year of publishing: | 2013 |
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| Number of pages: | str. 68-72 |
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| Numbering: | Vol. 2013, no. 1 |
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| PID: | 20.500.12556/DKUM-50442  |
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| UDC: | 681.586 |
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| ISSN on article: | 1855-9913 |
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| COBISS.SI-ID: | 17034006 |
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| NUK URN: | URN:SI:UM:DK:G0MFHOHJ |
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| Publication date in DKUM: | 10.07.2015 |
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| Views: | 1242 |
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| Downloads: | 16 |
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| Metadata: |     |
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| Categories: | Misc.
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