Noninvasive respiration movement sensor based on distributed Bragg reflector fiber laser with beat frequency interrogation.
A distributed Bragg reflector fiber laser-based respiration movement monitoring system has been proposed and experimentally demonstrated. To fabricate the sensing element for respiration monitoring, a fixture that consists of a plastic plate, a section of elastic textile is employed to experience and transfer the belly expansion induced pressure onto the cross-section of the laser cavity. By tracing the change of the beat signal that generates between two polarization lasing modes, the information of the respiration movement can be extracted in real time. Experimental studies have demonstrated that the system is able to detect both respiration waveform and rate simultaneously. Moreover, the recorded results show that the different gestures as well as the physiology conditions can be distinguished by monitoring the amplitude and period change of the waveform. It is anticipated that the proposed fiber laser-based sensor would be highly suitable for respiratory monitoring.
Huazhong University of Science and Technology, National Engineering Laboratory for Next Generation Internet Access System, School of Optical and Electronic Information, Wuhan 430074, China.
Jianghai
J
Wo
Huazhong University of Science and Technology, National Engineering Laboratory for Next Generation Internet Access System, School of Optical and Electronic Information, Wuhan 430074, China.
He
H
Wang
Huazhong University of Science and Technology, National Engineering Laboratory for Next Generation Internet Access System, School of Optical and Electronic Information, Wuhan 430074, China.
Qizhen
Q
Sun
Huazhong University of Science and Technology, National Engineering Laboratory for Next Generation Internet Access System, School of Optical and Electronic Information, Wuhan 430074, ChinabNanyang Technological University, OPTIMUS, School of Electrical an.
Perry Ping
PP
Shum
Huazhong University of Science and Technology, National Engineering Laboratory for Next Generation Internet Access System, School of Optical and Electronic Information, Wuhan 430074, China.
Deming
D
Liu
D000328:Adult; D004548:Elasticity; D004867:Equipment Design; D015444:Exercise; D005336:Fiber Optic Technology; D006801:Humans; D007834:Lasers; D008297:Male; D008991:Monitoring, Physiologic / Q000295:instrumentation* / Q000379:methods; D009068:Movement; D055100:Optical Fibers; D011187:Posture; D011312:Pressure; D012031:Refractometry; D012119:Respiration; D012815:Signal Processing, Computer-Assisted; D013696:Temperature; D013784:Textiles; D014159:Transducers; D014584:User-Computer Interface