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    • 3. 发明授权
    • Sonar navigation system
    • 声纳导航系统
    • US4635240A
    • 1987-01-06
    • US716304
    • 1985-03-26
    • Kenneth P. Geohegan, Jr.Charles W. Allen
    • Kenneth P. Geohegan, Jr.Charles W. Allen
    • G01S15/60G01S15/00
    • G01S15/60
    • A forward look sonar system in which speed and direction of a sonar platform is obtained. Each acoustic transmission towards the target area over which the platform is traveling is comprised of a plurality of frequencies. A plurality of receiver beams is formed and each individual beam from one transmission is cross-correlated with its corresponding beam from a selected subsequent transmission to derive a delay value. The later received signal for each beam, for each frequency is divided into a plurality of small segments each of which is cross-correlated with a portion of the first return signal corresponding to the same frequency and beam. The cross-correlation functions for the plurality of frequencies for each particular segment are added together to obtain a more precise delay value. The correlation functions for each of the beams are added together and compared to derive a value for platform direction in the intercomparison period and the delay values are utilized to derive a velocity indication.
    • 获得声纳平台速度和方向的前瞻性声纳系统。 朝向平台所在的目标区域的每个声音传输由多个频率组成。 形成多个接收机波束,并且来自一个传输的每个单独的波束与来自所选择的后续传输的相应的波束进行交叉相关以导出延迟值。 对于每个频率,每个波束的稍后接收的信号被分成多个小段,每个小段与对应于相同频率和波束的第一返回信号的一部分互相关。 将用于每个特定段的多个频率的互相关函数相加在一起以获得更精确的延迟值。 将每个光束的相关函数相加在一起,并进行比较以导出比较周期中平台方向的值,并且使用延迟值来导出速度指示。
    • 4. 发明授权
    • Sonar system for detection of near bottom targets
    • 用于检测近底目标的声纳系统
    • US5414675A
    • 1995-05-09
    • US755117
    • 1985-07-15
    • Kenneth P. Geohegan, Jr.
    • Kenneth P. Geohegan, Jr.
    • G01S7/52G01S15/87G01S3/66G01S15/89
    • G01S7/52003G01S15/87
    • Target detection apparatus wherein a pulse of acoustic energy transmitted toward a target area of the sea bottom is reflected back to two spaced-apart receiver transducers. The sum and difference of the transducer outputs are obtained with the phase relationship therebetween being detected. An acoustic return from a target above or on the bottom will cause two returns to arrive at the receiver transducers at very slightly different times and at different angles thereby resulting in a phase relationship different than a return from the bottom. An output signal indicative of a target or no target condition is provided and is normalized so that its amplitude is independent of target strength.
    • 目标检测装置,其中向海底目标区域传输的声能的脉冲被反射回两个间隔开的接收换能器。 在检测到传感器输出之间的相位关系时获得传感器输出的和差。 从目标上方或底部的声音返回将导致两个返回以非常稍微不同的时间和不同的角度到达接收器换能器,由此导致与从底部的返回不同的相位关系。 提供指示目标或无目标条件的输出信号并被归一化,使其幅度与目标强度无关。
    • 5. 发明授权
    • Inertial balanced dipole hydrophone
    • 惯性平衡偶极子水听器
    • US4131874A
    • 1978-12-26
    • US796243
    • 1977-05-12
    • Kenneth P. Geohegan, Jr.
    • Kenneth P. Geohegan, Jr.
    • B06B1/06H04B13/00
    • B06B1/0603
    • A dipole hydrophone which includes a piezoelectric bender bar having at the ends thereof two identical disks having high added mass and low actual mass, and a single mass at the center with low added mass and high actual mass. Support wires are connected to the unit at the bender nodes so that movement of the support causes no electrical output. Another configuration includes a piezoelectric bender disk having an annular ring near the edge portion thereof and a single mass at the center of the disk with the ring and central mass having the same relationship as the disk and central mass of the other embodiment.
    • 一种双极水听器,其包括压电弯曲杆,其端部具有两个相同的盘,其具有高附加质量和低实际质量,并且在中心具有低质量和高实际质量的单个质量。 支撑线在弯曲节点处连接到单元,使得支撑件的移动不会导致电气输出。 另一种结构包括在其边缘部分附近具有环形环的压电弯曲盘和在盘的中心处的单个质量块,其中环和中心质量具有与另一实施例的盘和中心质量相同的关系。