摘要
讨论了一个三维成像声呐的系统结构、成像原理及其软件、硬件设计与实现中遇到的有关技术问题.由于采用了二维面阵,该系统可以在一次发射中获取一系列二维回波序列图像,处理单元则据此二维序列图像合成完整的三维声像.本系统的二维面阵由16×8个基元构成,跟随有128通道信号调节器(放大、滤波、自动增益控制等),其后是128通道并行A/D转换器和缓存.该128路并行数据经并/串转换及接口,通过光纤传至水上单元,经由水上单元的PC机及DSP处理器进行三维图像重建及显示.软件由三维成像模型及并行波束形成和聚焦算法构成.虽然该系统是为水下机器人声视觉而设计的,其在海洋工程和水下防卫中具有广泛的应用价值.
The system structure, imaging principle, software and hardware of a 3D imaging sonar and the issues of its implementation are discussed.Since the 2D acoustic array has been used, the system may obtain a set of progressive 2D image sequences from one acoustic power transmission, with which the processing unit composites a complete 3D image.The underwater subsystem is composed of 16 8 transducer elements, 128 channel conditioners (amplifiers, filters, AGC and so on), 128 A/D converters and buffers. After series to parallel converting, the data are transmitted to a surface unit through a fibre. The DSP board and PC in surface unit make 3D image reconstruction and display. The software package contains parallel beam-forming and focusing algorithms, so that the 3D imaging can be implemented.Although the system is designed for an UUV, it can be widely used in oceanic engineering and underwater defence purposes.
出处
《哈尔滨工程大学学报》
EI
CAS
CSCD
2003年第3期241-244,共4页
Journal of Harbin Engineering University