Characterization of Multiple-bend Optical Fiber Extensometer Design for Landslide Sensor

  Author(s)
Aldo Novaznursyah Costrada    (Department of Physics, Faculty of Mathematics and Natural Science, Universitas Andalas, Padang.)
Sixtinah Deswilan (Department of Physics, Faculty of Mathematics and Natural Science, Universitas Andalas, Padang.)
Badrul Mustafa Kemal (Department of Civil Engineering, Faculty of Engineering, Universitas Andalas, Padang.)
Harmadi Harmadi (Department of Physics, Faculty of Mathematics and Natural Science, Universitas Andalas, Padang.)

 ) Corresponding Author
Copyright (c) 2021 Aldo Novaznursyah Costrada, Sixtinah Deswilan, Badrul Mustafa Kemal, Harmadi Harmadi
  Abstract

Design of multiple-bend extensometer based on optical fiber as landslide sensor has been characterized. Multiple-bending characterization has been done by varying the winding number of optical fiber FD-620-10 to obtain the photodiode's effective light intensity.  The light intensity in the extensometer was set by varying the laser diode resistance in the range (150 – 250) Ω.  The optimum sensitivity of 0.03984 V/cm was obtained for triple winding of optical fiber. The designed optical extensometer is able to monitor the displacement with an error of 0.59%. This result indicates that the designed extensometer is the more bending on optical fiber, the more its sensitivity and the bending loss.

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