Yin Jianjing, Xu Xuemei, Ding Yipeng. Real-Time Monitoring and Demodulation System of Fiber Bragg Grating Displacement Sensor[J]. Laser & Optoelectronics Progress, 2018, 55(1): 10601
- Laser & Optoelectronics Progress
- Vol. 55, Issue 1, 10601 (2018)
Fig. 1. FBG displacement sensor demodulation system
Fig. 2. Generation system frame of sawtooth wave
Fig. 3. Flow chart of wavelet threshold denoising
Fig. 4. Effects of wavelet threshold denoising. (a) Original signal; (b) wavelet threshold denosing signal; (c) partial magnification of some peak point in a grating channel for original signal; (d) partial magnification of the peak point for denoising signal
Fig. 5. Ideal peak shape and double peak shape. (a) Ideal peak shape; (b) double peak shape
Fig. 6. Invalid peak shape and left peakshape. (a) Invalid peak shape; (d) left peak shape
Fig. 7. Schematic diagrams of Gaussian models. (a) Standard Gaussian curve; (b) asymmetric Gaussian curve
Fig. 8. Effects of Gaussian fitting algorithm. (a) Total peak points after Gaussian fitting and the second processing; (b) partial magnification of some peak point
Fig. 9. Photo of FBG demodulation platform
Fig. 10. Displacement sensor waveform display
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Table 1. Measurement results
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