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RSS FeedsSensors, Vol. 18, Pages 1607: Sensitivity Enhancement of FBG-Based Strain Sensor (Sensors)

 
 

21 may 2018 06:01:44

 
Sensors, Vol. 18, Pages 1607: Sensitivity Enhancement of FBG-Based Strain Sensor (Sensors)
 


A 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.


 
46 viewsCategory: Chemistry, Physics
 
Sensors, Vol. 18, Pages 1608: Determination of the Maximum Temperature in a Non-Uniform Hot Zone by Line-of-Site Absorption Spectroscopy with a Single Diode Laser (Sensors)
Sensors, Vol. 18, Pages 1606: Improving the Energy Saving Process with High-Resolution Data: A Case Study in a University Building (Sensors)
 
 
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