Cui ZHANG, Rui LUO, Yinjie ZHANG, Sikai JIA, Weibing GAN. Fourier Series Based Grating Wavelength Signal Reconstruction and Accurate Vibration Displacement Measurement[J]. Acta Photonica Sinica, 2024, 53(8): 0806002
- Acta Photonica Sinica
- Vol. 53, Issue 8, 0806002 (2024)
Fig. 1. Vibration test systems
Fig. 2. Sensitivity fitting curve
Fig. 3. Comparison of wavelength offsets reconstructed using FSWCM with wavelength offsets of the original grating
Fig. 4. Comparison of FSWCM and MFWCM results for vibration acceleration and vibration displacement
Fig. 5. Comparison of wavelength offsets between FSWCM reconstructed gratings and original gratings for dual-frequency vibrational excitation
Fig. 6. Spectrogram of FSWCM-reconstructed grating wavelength offsets versus original grating wavelength offsets under dual-frequency vibration excitation
Fig. 7. The time-domain response of vibration acceleration of FSWCM and MFWCM under dual frequency vibration excitation
Fig. 8. The time-domain response of vibration displacement of FSWCM and MFWCM under dual frequency vibration excitation
Fig. 9. Fiber Bragg grating accelerometer and electrical sensor installation diagram
Fig. 10. Comparison of the wavelength offset of the FSWCM reconstructed grating with the wavelength offset of the original grating for the upper rack Y
Fig. 11. Spectrogram of FSWCM reconstructed grating wavelength offsets versus original grating wavelength offsets for the upper rack Y
Fig. 12. Time domain response of FSWCM and MFWCM vibration acceleration of upper rack Y
Fig. 13. Time domain response of FSWCM and MFWCM vibration displacement of upper rack Y
Fig. 14. Comparison of upper rack Y and stator end data
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Table 1. Comparison of vibration acceleration calculation results between FSWCM and MFWCM
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Table 2. Comparison of vibration displacement calculation results between FSWCM and MFWCM
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Table 3. Dual-frequency vibration excitation parameters
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Table 4. Comparison of peak-to-peak vibration displacements for FSWCM and MFWCM
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