• Opto-Electronic Engineering
  • Vol. 51, Issue 3, 230285-1 (2024)
Shenbo Hu1,2, Junchen Liu1,2, Su Yu3, Chengyu Yang1,2..., Xinghua Qu1,2 and Fumin Zhang1,2,*|Show fewer author(s)
Author Affiliations
  • 1School of Precision Instrument and Opto-Electronics Engineering, Tianjin University, Tianjin 300072, China
  • 2National Key Laboratory of Precision Testing Technology and Instruments, Tianjin University, Tianjin 300000, China
  • 3Erzhong (Deyang) Heavy Equipment Co., Ltd, Deyang, Sichuan 618000, China
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    DOI: 10.12086/oee.2024.230285 Cite this Article
    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 Copy Citation Text show less
    The basic optical diagram of FMCW laser ranging
    Fig. 1. The basic optical diagram of FMCW laser ranging
    HCN gas cell signal diagram
    Fig. 2. HCN gas cell signal diagram
    Schematic diagram of FMCW ranging system based on HCN gas cell
    Fig. 3. Schematic diagram of FMCW ranging system based on HCN gas cell
    Schematic diagram of HCN absorption peak phase fitting
    Fig. 4. Schematic diagram of HCN absorption peak phase fitting
    HCN combined with resampling multiline ranging system
    Fig. 5. HCN combined with resampling multiline ranging system
    Error comparison of three measurement methods
    Fig. 6. Error comparison of three measurement methods
    Differential error bar with a step of 10 mm
    Fig. 7. Differential error bar with a step of 10 mm
    Signal comparison diagram. (a) Before resampling and filtering;(b) After Resampling and filtering
    Fig. 8. Signal comparison diagram. (a) Before resampling and filtering;(b) After Resampling and filtering
    Comparison chart of the results of three measurement methods
    Fig. 9. Comparison chart of the results of three measurement methods
    The standard deviation of four-way measurement at different positions
    Fig. 10. The standard deviation of four-way measurement at different positions
    Four-channel measurement differential error bar
    Fig. 11. Four-channel measurement differential error bar
    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
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