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Unobtrusive monitoring of human vital functions based on speckle interferometry with plastic optical fiberPodbreznik, 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.Source: LAHA : journal of the Laser and Health Academy. - ISSN 1855-9913 (Vol. 2013, no. 1, 2013, str. 68-72)Type of material - article, component partPublish date - 2013Language - englishCOBISS.SI-ID - 17034006
source: LAHA : journal of the Laser and Health Academy. - ISSN 1855-9913 (Vol. 2013, no. 1, 2013, str. 68-72)
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Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Podbreznik, Peter | 26194 |
Đonlagić, Denis | 15006 |
Lešnik, Dejan | 34005 |
Cigale, Boris | 20206 |
Zazula, Damjan | 08061 |
Source: Personal bibliographies
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