摘要
拖线列阵声纳大多采用单根线列阵作为基阵测定目标方位,其不能获得目标距离信息,并存在左右舷分辨问题。针对近场声波的特点,根据时域波束形成原理建立以目标方位和距离为自变量的目标函数,当拖线阵阵形发生畸变时,通过二维搜索后目标函数最大值所对应的自变量值确定目标方位和距离,实现目标定位。此外,通过畸变后目标函数灰度图的变化,辨别出目标方位和镜像源方位,从而解决左右舷分辨问题。仿真实验验证了方法的正确性。
Single line array is usually used by towed line array to measure target＇ s bearing,but it can＇ t acquire information of target＇ s range or there is a problem of port/starboard discrimination. Aiming at the characters of sound wave in the near-field zone, according to the theory of time domain beam-torming, the target function whose parameters are target＇ s bearing and range is established. When the towed line array distress, target＇ s bearing and range can be acquired according to the parameters related to the maximum value of target function through two- dimensions searching, the target location is realized, target＇ s bearing and mirror source bearing could be discriminated according to the change of target function＇ s grey-scale picture. The problem of port/starboard discrimination is solved. The validity of this method is verified by simulations.
出处
《传感器与微系统》
CSCD
北大核心
2011年第10期72-74,共3页
Transducer and Microsystem Technologies
关键词
近场
拖线阵
方位
距离
阵形畸变
左右舷分辨
near-field zone
towed line array
bearing
range
array shape distortion
port/starboard discrimination
