Laser Transmission Characteristics of Wake Bubble Curtain
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摘要: 舰船在航行过程中会产生尾流区域, 激光穿过气泡尾流区域时会发生散射现象, 通过对散射光的探测和分析, 能够实现检测与识别舰船的目的。文中研究了尾流气泡幕对激光传输特性的影响, 并利用光纤光谱仪探测了尾流气泡幕的光强变化。实验仿真了不同压强下的尾流气泡幕在距离水面5、15和20 cm, 气泡幕厚度分别为10、15 cm时的光强变化, 并探讨了前向散射和后向散射的光强随压强的变化情况。仿真实验结果表明, 随着压强的增大, 光强变化逐渐降低, 气泡浓度与半径也随之增大; 气泡浓度越大, 光强变化越小; 随着压强的增大, 前向散射光强逐渐呈线性降低, 而后向散射光强则会随之增大。Abstract: In the process of navigation, the ship will produce the wake region, and the scattering phenomenon occurs when the laser passes through the wake region of the bubble. Through the detection and analysis of the scattered light, the ship can be detected and identified. In this paper, the influence of the wake bubble curtain on laser transmission characteristics was investigated, and the light intensity changes of the wake bubble curtain were detected based on a fiber optic spectrometer. The experiment simulated the light intensity change of the wake bubble curtain with a thickness of 10 cm and 15 cm under different pressures at 5, 15, and 20 cm away from the water surface and explored the variation of intensity of forward and backward scattered light with pressure. The experimental results show that with the increases in pressure, the variation of light intensity slows down, and the concentration and the radius of the bubble increase. Higher bubble concentration indicates a smaller variation of light intensity. With the increase in pressure, the intensity of forward scattered light decreases linearly, and the intensity of backward scattered light increases.
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Key words:
- wake bubble curtain /
- scattered light /
- bubble concentration
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表 1 实验仪器型号及参数
Table 1. Models and parameters of experimental instruments
仪器 型号/参数 微型光谱仪 Flame-S-UV-UIS-ES Oceanview V. 1.6.7 光纤探头 QP600-2-UV-UIS 长2 m He-Ne 激光器 波长632.8 nm 微孔陶瓷管 外径68 mm、内径30 mm、长750 mm、膜孔径10 μm 高压气泵 550W-8L 玻璃水池 高80 cm、宽80 cm、长160 cm、厚12 mm -
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