Hongke Wang, Decheng Xu, Lei Lin, Yuwei Qi, Guodong Zhang. Design and Strain Characteristics of Trifarious Fiber Bragg Grating Strain Sensor[J]. Laser & Optoelectronics Progress, 2022, 59(11): 1128001
- Laser & Optoelectronics Progress
- Vol. 59, Issue 11, 1128001 (2022)
Fig. 1. Structure of the FBG sensor
Fig. 2. Packaging process of trifarious FBG strain sensor. (a) Welding schematic diagram; (b) photo after encapsulation; (c) photo after calibration
Fig. 3. Calibration of the sensor
Fig. 4. Schematic diagram of the experimental setup
Fig. 5. Static test curves of the two sensors. (a) Time domain signal of resistance strain gauge; (b) time domain signal of FBG strain sensor
Fig. 6. Sinusoidal sweep response curves of two sensors. (a) Time domain signal of strain gauge; (b) time domain signal of FBG strain sensor
Fig. 7. Random vibration time domain signals of two sensors. (a) Time domain signal of strain gauge; (b) time domain signal of FBG strain sensor
Fig. 8. Power spectrum of random vibration signals of two sensors. (a) Strain gauge; (b) FBG strain sensor
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Table 1. Calibration result of FBG sensor
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Table 2. Parameter settings of random vibration experiment
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Table 3. Results of static test
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