Design of an All-POF-Fiber Smartphone Multichannel Breathing Sensor With Camera-Division Multiplexing

We report the design and prototyping of an all-fiber-smartphone multiplexed sensor, with the purpose of breathing rate analysis. The architecture is based on a multichannel extrinsic sensor based on intensity modulation. The sensing system is entirely based on plastic optical fiber (POF). The optica...

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Bibliographic Details
Published in:IEEE sensors letters 2019-05, Vol.3 (5), p.1-4
Main Authors: Aitkulov, Arman, Tosi, Daniele
Format: Article
Language:English
Subjects:
Breathing
Cameras
Connectors
Crosstalk
Division
Electromagnetic wave sensors
fiber optic sensors (FOS)
Multiplexing
Optical fiber sensors
Optical fibers
plastic optical fiber (POF)
Power spectral density
Prototyping
Respiration
sensor multiplexing
Sensors
smartphone sensors
Smartphones
Three dimensional printing
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Summary:We report the design and prototyping of an all-fiber-smartphone multiplexed sensor, with the purpose of breathing rate analysis. The architecture is based on a multichannel extrinsic sensor based on intensity modulation. The sensing system is entirely based on plastic optical fiber (POF). The optical hardware is entirely based on the smartphone, using the flashlight LED as the source and the camera as the pixel-based detector. A 3-D printed connector has been fabricated to facilitate light coupling to and from the POF links. A multiplexing concept labeled "camera-division multiplexing" has been implemented and is reported for a three-fiber system: The camera is spatially tessellated, dividing the contribution of each fiber with crosstalk 8.2-15.3 dB. The application for breathing rate detection, with camera ISO set to 800, is proposed and implemented, visualizing the power spectral density of the respiration pattern.
ISSN:2475-1472
2475-1472
DOI:10.1109/LSENS.2019.2912982