双基地声纳目标特性实验研究  

Experimental Study of Scattering Strength of Underwater Target

作　　者：徐贵英[1,2] 丁玮[1,2] 阎宜生[1,2] 赵俊渭[1,2] 赵日昌 

机构地区：[1]西北工业大学 [2]中国船舶工业总公司760研究所

出　　处：《西北工业大学学报》1997年第3期476-481,共6页Journal of Northwestern Polytechnical University

基　　金：航空科学基金;船总"八五"预研科题资助

摘　　要：为了解双基地声纳目标强度特性及目标回波信号结构，用高逼真度模型进行了实验研究，找出了目标强度与声波入射方位角及分置角的关系，得出了在接收方向上获取最大目标强度值时入射角与分置角应满足的条件，这将对收发分置系统双基地的配置有重要价值。Sonar engineers in P.R.China now need reliable scattering strength, which is different for monostatic and bistatic sonars and which, for bistatic sonar, is not available in detail in the open literature. The model of underwater target used in our tests was metallic. We deem that metal can approximate the target better than other material. Our model was scaled down to only 2% in linear dimension from the real target, including its internal structure. Measured values of scattering strength are shown in Fig.3. Figs.3(a), (b), (c), and (d) are for bistatic angle (∠SOR) equal to 30 °, 60 °, 90 °, and 145 ° respectively. Scattering strength varies with angle of incidence θ . It peaks at θ ≈90 °-(α/2) or θ ≈270 °-(α/2), where α is the bistatic angle (∠SOR). It is desirable to decompose reflected waves into parts that come from different places in the target. We did some preliminary work and the test results are presented in Figs.4 and 5.

关 键 词：声纳 目标强度 双基地声纳 方位角 分置角 

分 类 号：U666.7[交通运输工程—船舶及航道工程]