Yuepeng LIANG, Runfeng HU, Fu LIU, Tongqing LIAO. The design and algorithm research of a high-precision laser Doppler online length measurement system[J]. Infrared and Laser Engineering, 2025, 54(2): 20240507
- Infrared and Laser Engineering
- Vol. 54, Issue 2, 20240507 (2025)
Fig. 1. Optical path diagram of laser Doppler velocimeter system
Fig. 2. Dual-beam and dual-scattering optical path analysis model
Fig. 3. Doppler signal processing flowchart
Fig. 4. Adaptive sampling flowchart
Fig. 5. Zoom-FFT spectrum refinement logic diagram
Fig. 6. Comparison chart of relative errors between fixed sampling frequency and adaptive sampling algorithm
Fig. 7. Accuracy verification chart of the energy centrobaric correction algorithm
Fig. 8. Comparison chart of relative error before and after spectrum thining
Fig. 9. Experimental platform
Fig. 10. Laser velocimeter calibration equipment
Fig. 11. Error in length measurement stability
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Table 1. Correspondence between sampling modes and speed ranges
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Table 2. Comparison table of measured results and calibration results
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