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  • Unobtrusive monitoring of human vital functions based on speckle interferometry with plastic optical fiber
    Podbreznik, Peter ...
    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.
    Vir: LAHA : journal of the Laser and Health Academy. - ISSN 1855-9913 (Vol. 2013, no. 1, 2013, str. 68-72)
    Vrsta gradiva - članek, sestavni del
    Leto - 2013
    Jezik - angleški
    COBISS.SI-ID - 17034006

    Povezava(-e):

    http://www.laserandhealthacademy.com/en/journal/?id=1425&type=1
    Digitalna knjižnica Univerze v Mariboru – DKUM

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