Characterization of Multiple-bend Optical Fiber Extensometer Design for Landslide Sensor
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.Â The light intensity in the extensometer was set by varying the laser diode resistance in the range (150 â€“ 250) Î©.Â 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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