Wen-tao LI, Hao TANG, Jian ZHOU. Research on Laser Velocimeter for Overspeed Detection on Highways[J]. Acta Photonica Sinica, 2020, 49(9): 0912001
- Acta Photonica Sinica
- Vol. 49, Issue 9, 0912001 (2020)
Fig. 1. Relative positions of light source, moving particle and light detector
Fig. 2. Gaussian beam field distribution and its transmission trough a single lens
Fig. 3. Diagram of beam transformation of double-lens telescopic system
Fig. 4. Structure of the laser velocity measuring system
Fig. 5. The flow chart of signal processing
Fig. 6. Two-dimensional image of the spot at the central working distance
Fig. 7. Actual testing environment of the system
Fig. 8. Signals of the system without the conversion lens group and the system with conversion lens group
Fig. 9. Results of velocity measuring of passing vehicles
Fig. 10. The enlarged views of the six peaks in Fig. 9
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Table 1. Main technical parameters of laser velocimeter
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Table 2. Experimental results atdifferent velocity levels
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Table 3. Performance comparison of velocimeter products
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