准确测量水下目标的目标强度

以测量球和短柱的目标强度为例 ,本文根据主动声纳方程数值模拟研究在测量水下目标的目标强度实验中应当满足的平面波入射、稳态和散射远场条件。讨论了满足基本远场条件存在的测试误差和平面波条件 ;除了单“亮点”回波外 ,根据回波形成机理 ,提出多“亮点”回波情况下建立稳态散射入射波脉冲的宽度必须大于窄脉冲回波的扩展宽度。

Exact measuring target strength of underwater target

Taking a sphere and a short cylinder as instance and based on active sonar equation, numerical simulation means are used to study the plane wave impinge, steady scattering and far field conditions should be satisfied in experiments of measuring the target strength in this paper. The measuring error when just satisfying the basic far field condition and plane wave condition are discussed. Besides single "high light" echo, according to the forming mechanism of echo, puts forward that under the many "high-light" echo circumstances, the steady scattering condition is that the incident pulse width must be greater than the extended width of narrow pulse echo.