Chinese Optics, Volume. 17, Issue 3, 560(2024)
Simulation and experiment of weak multi-target laser detection in complex hydrology
Fig. 4. Laser backscattering peak values of a single target at different distances under different water quality conditions
Fig. 5. Echo signal diagrams of three targets with different turbidity values
Fig. 6. Echo signal diagrams of target with different reflectance values
Fig. 7. Echo signal diagrams of four targets with different turbidity values
Fig. 14. An experimental system for multi-target laser detection in a certain lake
Fig. 19. Laser backscattering echo time plots with different targets
Fig. 20. Laser backscatter echo intensity plots with different targets
Table 1. Reflection coefficients of different targets[25]
View tableView in ArticleTable 1. Reflection coefficients of different targets[25]
目标类型 反射系数 气泡群 0.05 鱼线 0.1 渔网 0.23 多孔礁石 0.36
Table 2. Statistics of the farthest distances of four detection targets under different water quality conditions
(m) View tableView in ArticleTable 2. Statistics of the farthest distances of four detection targets under different water quality conditions
(m) 水质 目标类型 气泡群 鱼线 渔网 多孔礁石 东海台湾海峡 17.2 25.4 30.5 38.8 黄海中部 15.8 22.7 25 32 渤海中部 12.4 19.6 22 26
Table 3. Three target detection distances under different water quality conditions
View tableView in ArticleTable 3. Three target detection distances under different water quality conditions
目标类型 时间/ns 探测距离/m 渔网 47.8 5.5 气泡群 87.0 10 鱼线/多孔礁石 113.1 13
Table 4. Four target detection distances under different water quality conditions
View tableView in ArticleTable 4. Four target detection distances under different water quality conditions
目标类型 时间/ns 探测距离/m 渔网 17.4 2 气泡群 34.8 4 鱼线 69.6 8 多孔礁石 87.0 10
Table 5. Size of test target
View tableView in ArticleTable 5. Size of test target
目标类型 尺寸 气泡群 D为70~90 μm 鱼线 D=210 μm 渔网 Φ=2.5 cm；D=280 μm；l=3 m 多孔礁石 L=15 cm；W=13 cm；H=20 cm
Table 6. Comparison of detection distance and actual distance for three targets
View tableView in ArticleTable 6. Comparison of detection distance and actual distance for three targets
目标类型 探测距离/m 时间/ns 实际探测距离/m 平均值/m 相对误差/m 标准差 渔网 5.5 51.2 46.5 48.6 5.894 5.345 5.582 5.607 0.107 0.1548 气泡群 10 91.9 87.85 84.05 10.366 9.909 9.475 9.916 0.084 0.210 鱼线 13 114.8 116.55 115.6 12.955 13.35 13.039 13.15 0.150 0.0538
Table 7. Comparison of detection distance and actual distance for four targets
View tableView in ArticleTable 7. Comparison of detection distance and actual distance for four targets
目标类型 探测距离/m 时间/ns 实际探测距离/m 平均值/m 相对误差/m 标准差 鱼线 2 18.5 18.3 18.05 2.128 2.105 2.075 2.102 0.102 0.03 气泡群 4 34.5 36.2 37.7 3.968 4.163 4.334 4.155 0.155 0.259 渔网 8 70.1 69.3 68.3 8.05 7.970 7.855 7.958 0.042 0.133 多孔礁石 10 91.1 86.5 87.15 10.477 9.940 10.010 10.142 0.142 0.413
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Si-guang ZONG, Shao-peng YANG, Xin ZHANG, Dan PENG, Zi-ke DUAN, Bao CHEN. Simulation and experiment of weak multi-target laser detection in complex hydrology[J]. Chinese Optics, 2024, 17(3): 560
Category: Original Article
Received: Aug. 20, 2023
Accepted: --
Published Online: Jul. 31, 2024
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