Abstract
This paper presents the development of an intensity variation-based polymer optical fiber (POF) curvature sensor integrated on a smartphone. In this case, the smartphone acts as the interrogation unit for the POF sensor, where the smartphone light emitting diode (LED) of its flashlight is used as the light source, whereas the smartphone camera is the light detector. Results show the feasibility of the proposed approach, where the sensor and interrogation unit were able to measure angle ranging from 0 to 90 ° at different angular velocities (0.94 rad/s, 1.39 rad/s and 2.62 rad/s). We also demonstrate the influence of the smartphone camera parameters on the sensor performance, where it was possible to obtain a sevenfold increase on the sensor sensitivity by just adjusting the camera ISO (parameter responsible for adjusting the camera sensitivity to ambient light).
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