基于片光源照明成像的水中群气泡特性测量

研究了舰船尾流分布特性规律,分析了图像法测量舰船尾流气泡参数的难点,提出了片光源照明、高速摄影技术结合的尾流气泡群测量方法.采用空气泵产生压缩空气,并通过微孔陶瓷管释放的方法建立了水中气泡产生及控制平台,系统通过调节空压泵气压,产生不同大小、密度、运动速度的气泡源,并采用片光源、短曝光时间（最小曝光时间为14μs）高速相机对不同气泡源进行了测量分析.结果表明：采用片光源照明、CCD照相技术可对气泡群进行清晰成像,空压泵压力的调节可获取不同尺寸、密度、运动速度的气泡源.

Study of Bubble Characteristic in Water by Use of High Speed Photography Based Line Lighting Lamp-House

The measure of warship wake bubble is a base for developing an underwater sound and light wake detector. The distribution characteristics of the warship wake were studied, and the difficulties in the bubble image measured by the image method were analyzed. A new method of bubble measure is put forward by use of high speed photography based line lighting lamp-house. The system of bubble controlling is established through the air pump and chinaware. The bubble image of different size is gained, and characteristic of bubble is analyzed based numeric image disposal. The result shows the measure of bubble characteristic by use of high speed photography based line lighting lamp-house is a good way.