Yu Wang, Tengfei Wu, Qiang Zhou, Hui Zhao, Jigui Zhu. Fast Acquisition and Processing Method of Optical Frequency Scanning Interferometry Ranging Signal[J]. Laser & Optoelectronics Progress, 2023, 60(1): 0107003
- Laser & Optoelectronics Progress
- Vol. 60, Issue 1, 0107003 (2023)
Fig. 1. Diagram of FSI ranging system
Fig. 2. Data processing process
Fig. 3. Diagram of equal optical frequency sampling. (a) Frequency-swept auxiliary interferometer signal; (b) rectified and frequency-doubled clock signal is used to resample the signal; (c) frequency-swept measuring interferometer signal; (d) final equal optical frequency interval sampling signal
Fig. 4. Diagram of extracting center frequency of the refined spectrum based on SFFT
Fig. 5. Process of refining spectrum of the resampled signal based on ZFFT
Fig. 6. Schematic diagram of the experimental device
Fig. 7. Experimental device. (a) Device for comparing the distance; (b) experimental optical beam path; (c) device for hardware resampling
Fig. 8. Effect of equal optical frequency sampling. (a) Spectrum of the signal without resampling; (b) software resampling and hardware resampling as well as their zoom-in spectra
Fig. 9. Comparison of spectra of FFT and SFFT with different sparsity degrees. (a) FFT spectrum; SFFT spectra with (b) k = 50, (c) k = 100, and (d) k = 200
Fig. 10. Computing time of FFT and SFFT with different sparsity degrees
Fig. 11. CZT spectrum and ZFFT spectrum as well as their zoom-in spectra
Fig. 12. Ranging residuals
|
Table 1. Running time of different algorithms
Set citation alerts for the article
Please enter your email address
© Copyright 2018-2021 | Chinese Laser Press. All Rights Reserved 沪ICP备15018463号-20