Phase Unwrapping and Frequency Points Subdivision of the Frequency Sweeping Interferometry Based Absolute Ranging System
Frequency sweeping interferometry (FSI) based absolute distance ranging has high precision and no ranging blind area. It can be used to realize large-scale and non-cooperative target measurement. However, the nonlinear frequency modulation of the laser seriously affects the ranging accuracy. In this...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI
2022
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| Subjects: | |
| Online Access: | View Fulltext in Publisher |
| LEADER | 01925nam a2200373Ia 4500 | ||
|---|---|---|---|
| 001 | 10.3390-s22082904 | ||
| 008 | 220510s2022 CNT 000 0 und d | ||
| 020 | |a 14248220 (ISSN) | ||
| 245 | 1 | 0 | |a Phase Unwrapping and Frequency Points Subdivision of the Frequency Sweeping Interferometry Based Absolute Ranging System |
| 260 | 0 | |b MDPI |c 2022 | |
| 856 | |z View Fulltext in Publisher |u https://doi.org/10.3390/s22082904 | ||
| 520 | 3 | |a Frequency sweeping interferometry (FSI) based absolute distance ranging has high precision and no ranging blind area. It can be used to realize large-scale and non-cooperative target measurement. However, the nonlinear frequency modulation of the laser seriously affects the ranging accuracy. In this manuscript, a measurement method assisted by Hilbert Transform (HT) and Chirp-z Transform (CZT) is proposed, which can realize the phase unwrapping of the beat signal, the length reduction in the delay fiber of auxiliary optical path, and the improvement of the frequency resolution. The narrow-band frequency suitable for HT is further studied. In the experiment, the ranging resolution is 70 μm and the standard deviation is 12.6 μm within a distance of 4005 mm. © 2022 by the authors. Licensee MDPI, Basel, Switzerland. | |
| 650 | 0 | 4 | |a Absolute distance |
| 650 | 0 | 4 | |a Absolute distance measurement |
| 650 | 0 | 4 | |a Chirp-z transform |
| 650 | 0 | 4 | |a CZT |
| 650 | 0 | 4 | |a Frequency sweeping |
| 650 | 0 | 4 | |a Frequency sweeping interferometry |
| 650 | 0 | 4 | |a FSI |
| 650 | 0 | 4 | |a High-precision |
| 650 | 0 | 4 | |a Hilbert transform |
| 650 | 0 | 4 | |a HT |
| 650 | 0 | 4 | |a Interferometry |
| 650 | 0 | 4 | |a Phase frequency |
| 650 | 0 | 4 | |a Phase-unwrapping |
| 650 | 0 | 4 | |a Ranging systems |
| 650 | 0 | 4 | |a Z transforms |
| 700 | 1 | |a Lin, H. |e author | |
| 700 | 1 | |a Liu, H. |e author | |
| 700 | 1 | |a Shi, G. |e author | |
| 700 | 1 | |a Song, L. |e author | |
| 700 | 1 | |a Sun, D. |e author | |
| 700 | 1 | |a Zhang, F. |e author | |
| 773 | |t Sensors | ||