Sensitivity Enhancement of FBG-Based Strain Sensor
AbstractA novel fiber Bragg grating (FBG)-based strain sensor with a high-sensitivity is presented in this paper. The proposed FBG-based strain sensor enhances sensitivity by pasting the FBG on a substrate with a lever structure. This typical mechanical configuration mechanically amplifies the strain of the FBG to enhance overall sensitivity. As this mechanical configuration has a high stiffness, the proposed sensor can achieve a high resonant frequency and a wide dynamic working range. The sensing principle is presented, and the corresponding theoretical model is derived and validated. Experimental results demonstrate that the developed FBG-based strain sensor achieves an enhanced strain sensitivity of 6.2 pm/με, which is consistent with the theoretical analysis result. The strain sensitivity of the developed sensor is 5.2 times of the strain sensitivity of a bare fiber Bragg grating strain sensor. The dynamic characteristics of this sensor are investigated through the finite element method (FEM) and experimental tests. The developed sensor exhibits an excellent strain-sensitivity-enhancing property in a wide frequency range. The proposed high-sensitivity FBG-based strain sensor can be used for small-amplitude micro-strain measurement in harsh industrial environments. View Full-Text
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Li, R.; Chen, Y.; Tan, Y.; Zhou, Z.; Li, T.; Mao, J. Sensitivity Enhancement of FBG-Based Strain Sensor. Sensors 2018, 18, 1607.
Li R, Chen Y, Tan Y, Zhou Z, Li T, Mao J. Sensitivity Enhancement of FBG-Based Strain Sensor. Sensors. 2018; 18(5):1607.Chicago/Turabian Style
Li, Ruiya; Chen, Yiyang; Tan, Yuegang; Zhou, Zude; Li, Tianliang; Mao, Jian. 2018. "Sensitivity Enhancement of FBG-Based Strain Sensor." Sensors 18, no. 5: 1607.
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