Shenbo Hu, Junchen Liu, Su Yu, Chengyu Yang, Xinghua Qu, Fumin Zhang. Multiline parallel precision coherent length measurement of frequency modulation continuous wave LiDAR[J]. Opto-Electronic Engineering, 2024, 51(3): 230285-1
- Opto-Electronic Engineering
- Vol. 51, Issue 3, 230285-1 (2024)
Fig. 1. The basic optical diagram of FMCW laser ranging
Fig. 2. HCN gas cell signal diagram
Fig. 3. Schematic diagram of FMCW ranging system based on HCN gas cell
Fig. 4. Schematic diagram of HCN absorption peak phase fitting
Fig. 5. HCN combined with resampling multiline ranging system
Fig. 6. Error comparison of three measurement methods
Fig. 7. Differential error bar with a step of 10 mm
Fig. 8. Signal comparison diagram. (a) Before resampling and filtering；(b) After Resampling and filtering
Fig. 9. Comparison chart of the results of three measurement methods
Fig. 10. The standard deviation of four-way measurement at different positions
Fig. 11. Four-channel measurement differential error bar
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