Multi-channel measurement for hetero-core optical fiber sensor by using CMOS camera

Yuya Koyama; Michiko Nishiyama; Kazuhiro Watanabe

doi:10.1117/12.2184463

1 July 2015 Multi-channel measurement for hetero-core optical fiber sensor by using CMOS camera

Yuya Koyama, Michiko Nishiyama, Kazuhiro Watanabe

Proceedings Volume 9655, Fifth Asia-Pacific Optical Sensors Conference; 965525 (2015) https://doi.org/10.1117/12.2184463
Event: Fifth Asia Pacific Optical Sensors Conference, 2015, Jeju, Korea, Republic of

Abstract

Fiber optic smart structures have been developed over several decades by the recent fiber optic sensor technology. Optical intensity-based sensors, which use LD or LEDs, can be suitable for the monitor system to be simple and cost effective. In this paper, a novel fiber optic smart structure with human-like perception has been demonstrated by using intensity-based hetero-core optical fiber sensors system with the CMOS detector. The optical intensity from the hetero-core optical fiber bend sensor is obtained as luminance spots indicated by the optical power distributions. A number of optical intensity spots are simultaneously readout by taking a picture of luminance pattern. To recognize the state of fiber optic smart structure with the hetero-core optical fibers, the template matching process is employed with Sum of Absolute Differences (SAD). A fiber optic smart glove having five optic fiber nerves have been employed to monitor hand postures. Three kinds of hand postures have been recognized by means of the template matching process. A body posture monitoring has also been developed by placing the wearable hetero-core optical fiber bend sensors on the body segments. In order for the CMOS system to be a human brain-like, the luminescent spots in the obtained picture were arranged to make the pattern corresponding to the position of body segments. As a result, it was successfully demonstrated that the proposed fiber optic smart structure could recognize eight kinds of body postures. The developed system will give a capability of human brain-like processing to the existing fiber optic smart structures.

Citation Download Citation

Yuya Koyama, Michiko Nishiyama, and Kazuhiro Watanabe "Multi-channel measurement for hetero-core optical fiber sensor by using CMOS camera", Proc. SPIE 9655, Fifth Asia-Pacific Optical Sensors Conference, 965525 (1 July 2015); https://doi.org/10.1117/12.2184463

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