A fiber Bragg grating (FBG) vibroacoustic sensor exploiting an intensity-based interrogation principle is presented. The optical system is complemented by signal processing techniques that allow disturbances to be mitigated and improve the spectral estimation. The sensor is capable of performing frequency ana- lysis of sounds up to 3 kHz, with top sensitivity in the 100–500 Hz frequency range, and of dynamically tracking pulsed phenomena that induce a strain to the FBG. The sensor has been applied to the detection of voice, showing a great intelligibility of the speech despite the low-quality environment, and to the monitoring of the heartbeat rate from the wrist.
Low-cost fiber Bragg grating vibro-acoustic sensor for voice and heartbeat detection / Tosi, D; Olivero, Massimo; Perrone, Guido. - In: APPLIED OPTICS. - ISSN 1559-128X. - STAMPA. - 47:28(2008), pp. 5123-5129. [10.1364/AO.47.005123]
Low-cost fiber Bragg grating vibro-acoustic sensor for voice and heartbeat detection
OLIVERO, MASSIMO;PERRONE, Guido
2008
Abstract
A fiber Bragg grating (FBG) vibroacoustic sensor exploiting an intensity-based interrogation principle is presented. The optical system is complemented by signal processing techniques that allow disturbances to be mitigated and improve the spectral estimation. The sensor is capable of performing frequency ana- lysis of sounds up to 3 kHz, with top sensitivity in the 100–500 Hz frequency range, and of dynamically tracking pulsed phenomena that induce a strain to the FBG. The sensor has been applied to the detection of voice, showing a great intelligibility of the speech despite the low-quality environment, and to the monitoring of the heartbeat rate from the wrist.File | Dimensione | Formato | |
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Tosi_ap08_fbg signal proc.pdf
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https://hdl.handle.net/11583/1995234
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