基于巴宾奈特原理的双基地声纳前向探测方法

Forward Detection for Bistatic Sonar Based on the Babinet's Principle

当物体靠近双基地声纳基线时,由于直达波的干扰,声纳系统存在检测盲区,因此提出基于巴宾奈特原理的双基地前向探测方法,其原理是在盲区对前向散射信号进行长时间的累计检测,实现双基地盲区检测。理论上推导出的水下前向散射目标强度的计算公式与旋转椭球体目标强度的经验公式一致。仿真表明前向散射信号强度呈眼状分布,讨论了利用对前向散射信号进行时间累计探测低速运动目标的可行性。

For the problem that the bistatic sonar can not detect the target near the baseline because of the interference of direct wave, a method based on the Babinefs principle is proposed for bistatic sonar detection. The basic idea is that the forward scattering signal is accumulated and detected for a long time in the blind zone of bistatic sonar. The result shows that the target strength formula derived in this paper is consistent with that of the rotational ellipsoid. The simulation results show that the forward scattering signal strength distribution looks like an eye. It is feasible to detect the slowly moving target in the blind zone with the proposed method.