摘要
将距离方位直角坐标显示转化为无失真的扇面显示是高分辨电子扫描声纳的主要任务之一.本文提出一种利用DSP器件进行这种快速转换的方案.在引进声纳载体航向角并完成转换的同时,可实现电子扫描声纳的波束航向稳定已建立的系统与编制的应用程序证明方案可行,在0～40 m距离量程内,扇面无失真显示图形刷新速率可这每秒10幅.
The high resolution electronic scanning technique is a fast and efficient approach for detecting small targets in water, which can scan a certain sector in within a transmitting pulse duration.The rectangular range-direction display is normally used in this kind of sector.However in short range, this display mode will cause image distortion, so that it is necessary to convert the rectangular range-direction display into a true sector display with no distortion.A scheme using DSP to perform the fast conversion in real time is presented by introducing the bearing of the sonar carrier, the sonar beam stabilization in the dimension of the direction can be realized while the conversion is performed.A built hardware system and some application software have proved available with this method.The sector image update rate has reached to 10 frames per second in a range of 40 m for a typical sector of 23 degrees.
关键词
声纳
水声
扫描
变换器
sonar
underwater acoustics
highresolution
scanning
