Open AccessMonitoring of vital bio-signs by analysis of speckle patterns in a fabric-integrated multimode optical fiber sensor
Author(s) -
Aviya Bennett,
Yevgeny Beiderman,
Sergey Agdarov,
Yafim Beiderman,
R. Hendel,
Barak Straussman,
Zeev Zalevsky
Publication year - 2020
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.384423
Subject(s) - multi mode optical fiber , vital signs , computer science , optical fiber , speckle pattern , fiber optic sensor , continuous monitoring , interference (communication) , optics , tracking (education) , light intensity , materials science , acoustics , channel (broadcasting) , computer vision , telecommunications , physics , engineering , medicine , operations management , surgery , psychology , pedagogy
Continuous noninvasive measurement of vital bio-signs, such as cardiovascular parameters, is an important tool in evaluation of the patient's physiological condition and health monitoring. Based on new enabling technologies, continuous monitoring of heart and respiration rate, pulse wave velocity and blood pressure have been investigated, advanced and reflected in numerous papers published in recent years. In this paper, we introduce a new technique for noninvasive sensing of vital bio-signs based on a multimode optical fiber sensor that can be integrated into a fabric. The sensor consists of a laser, optical fiber, video camera and computer. Its operation is based on tracking of point-wise intensity variations on speckle patterns caused by interference of the light modes within the fiber subjected to deformation. The paper contains theoretical analysis and experimental validation of the proposed scheme. The main goal is to advance a simple low-cost sensor embedded in a cloth fabric to track changes in the cardiovascular condition of the wearer.