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    • 6. 发明授权
    • Underwater detection system
    • 水下检测系统
    • US5805528A
    • 1998-09-08
    • US610941
    • 1996-03-05
    • Tokihiko HamadaYoshinari YoshidaYuzuru HiraokaGenzi MoriHiroyasu FujimotoYoshiki TominagaTatsuo Hayashi
    • Tokihiko HamadaYoshinari YoshidaYuzuru HiraokaGenzi MoriHiroyasu FujimotoYoshiki TominagaTatsuo Hayashi
    • G01S7/524G01S7/62G01S15/42G01S15/89G01S15/96
    • G01S7/6263G01S15/89G01S7/6227G01S15/42G01S15/8902G01S15/96G01S7/524
    • An underwater detection system for displaying underwater conditions over a large area around a ship comprises a linear array type transducer, a transducer training mechanism for rotating the transducer stepwise in a horizontal plane, a receiver which forms a receiving beam for scanning a fan-like vertical cross-sectional area by giving specified time delays or phase differences to echo signals received by the transducer, an image memory for storing echo signal data picked up by the receiving beam in addresses defined by horizontal directions relative to the ship and depths, a sampling circuit for reading out data of one vertical line after another in a downward direction from the image memory and determining a bottom depth in each vertical line, a seabed data memory for storing bottom depths, a PPI image generator for producing a fractional PPI image depicting the bottom based on bottom depth data read from the seabed data memory, and an indicator for presenting search results in the form of a plan view covering a large area of search around the ship by jointly displaying fractional PPI images produced by the PPI image generator.
    • 一种用于在船周围大面积显示水下条件的水下检测系统包括线性阵列式换能器,用于在水平面中逐步旋转换能器的换能器训练机构,形成用于扫描扇形垂直的接收束的接收器 通过给由换能器接收到的回波信号给定规定的时间延迟或相位差的横截面积;图像存储器,用于存储由相对于船舶和深度的水平方向限定的地址中由接收波束拾取的回波信号数据;采样电路 用于从图像存储器向下读出一条垂直线的数据,并确定每条垂直线的底部深度,用于存储底部深度的海底数据存储器,用于产生描绘底部的PPI图像的PPI图像生成器 基于从海底数据存储器读取的底部深度数据,以及用于在f中呈现搜索结果的指示符 通过共同显示由PPI图像发生器产生的PPI图像的分数,涵盖船上大面积搜索的平面图。