Unobtrusive monitoring of human vital functions based on speckle interferometry with plastic optical fiber

Peter Podbreznik (Avtor), Denis Đonlagić (Avtor), Dejan Lešnik (Avtor), Boris Cigale (Avtor), Damjan Zazula (Avtor)

Povzetek

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.

Ključne besede

plastic optical fiber;speckle interferometry;unobtrusive monitoring;heartbeat detection;respiration detection;phase-shift method;wavelet transform;

Podatki

Jezik:	Angleški jezik
Leto izida:	2013
Tipologija:	1.01 - Izvirni znanstveni članek
Organizacija:	UM FERI - Fakulteta za elektrotehniko, računalništvo in informatiko
UDK:	681.586
COBISS:	17034006
ISSN:	1855-9913
Št. ogledov:	1060
Št. prenosov:	13
Ocena:	0 (0 glasov)
Metapodatki:

Ostali podatki

Sekundarni jezik:	Angleški jezik
URN:	URN:SI:UM:
Vrsta dela (COBISS):	Delo ni kategorizirano
Strani:	str. 68-72
Letnik:	ǂVol. ǂ2013
Zvezek:	ǂno. ǂ1
Čas izdaje:	2013
ID:	1439581