Abstract
In this study, an optical fiber sensor for the simultaneous measurement of pressure and position based on a pair of fiber Bragg gratings (FBG) in a clamped beam is proposed. The FBG pair are pasted on a one-meter-long beam, and the pasted position is at 20 cm and 80 cm. The pressure and the position information applied at any point of the beam could be obtained through the wavelength shift of the FBG pair. The experimental results show that in the pressure range of 0 to 40 N, the maximum pressure sensitivity of the sensor is 54 pm/N. In the position range of 20 to 80 cm, the minimum error of position detection is 0.38 cm. The proposed sensor has the advantages of good stability, high sensitivity, simple manufacturing process, and low cost.
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