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Feasibility study on fiber-optic goniometer for measuring knee joint angle

  • Special Section: The 9th International Conference on Optics-photonics Design & Fabrication “ODF’14, Itabashi, Tokyo”
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Abstract

In this study, we fabricated a fiber-optic goniometer using a plastic optical fiber, a light-emitting diode, and a photodiode. The cladding of the plastic optical fiber was removed at 0.5–3mm intervals regularly to increase the bending loss of the plastic optical fiber. Also, the output voltages of the photodiode based on light intensity that measured using the fiber-optic goniometer were measured light intensities using the fiber-optic goniometer were measured to evaluate the linearity of the fiber-optic goniometer. Finally, we measured the responses of the fiber-optic goniometer for gait speeds of 3, 5, and 10 km/h using a data acquisition board and a LabVIEW program.

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Authors and Affiliations

  1. School of Biomedical Engineering, Research Institute of Biomedical Engineering, Konkuk University, Chungju, 380-701, Korea

    Seon Geun Kim, Kyoung Won Jang, Wook Jae Yoo, Sang Hun Shin & Bongsoo Lee

  2. Department of Organic Materials & Fiber Engineering, College of Engineering, Soongsil University, Seoul, 156-743, Korea

    Seunghyun Cho

Authors
  1. Seon Geun Kim
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  2. Kyoung Won Jang
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  3. Wook Jae Yoo
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  4. Sang Hun Shin
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  5. Seunghyun Cho
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  6. Bongsoo Lee
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Correspondence to Bongsoo Lee.

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Kim, S.G., Jang, K.W., Yoo, W.J. et al. Feasibility study on fiber-optic goniometer for measuring knee joint angle. OPT REV 21, 694–697 (2014). https://doi.org/10.1007/s10043-014-0112-z

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  • DOI: https://doi.org/10.1007/s10043-014-0112-z

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