干涉合成孔径声纳系统中的数据采集

Data Acquisition in Interferometric Synthetic Aperture Sonar System

为了协调测绘速率与方位模糊之间的矛盾,给出了干涉合成孔径声纳采集系统中信号源的设计、多路回波信号的同步采集、时变增益的控制、姿态数据的获取等问题的解决方案,采用双线程技术实现了回波与姿态数据的同时采集。经干涉合成孔径声纳湖试检验,证明此采集系统是稳定可行的。

Interferometric synthetic aperture sonar （InSAS） usually adopts multi-receiver as a compromise between mapping rate and azimuth ambiguity. So synchronal acquisition Of multi-channel echo signal is necessary for the system coherence. In addition, the acquisition system resolves signal attenuation and roll error by serious influence on interferometric imaging. A set of means includes signal generation, synchronal acquisition of multi-channel echo signal, attitude data, and controlling of TVG （Time variable gain）. Both echo signal and attitude data are synchronously collected by dual-thread technology. Results from lake trials of the InSAS demonstrate the reliability and the feasibility of the acquisition system.