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1. 发明授权

US4320397A Echo tracker/range finder for radars and sonars 失效
标题翻译：回波跟踪器/雷达和声纳测距仪
公开(公告)号：US4320397A
公开(公告)日：1982-03-16
申请号：US53572
申请日：1979-06-29
申请人： Robert A. Administrator of the National Aeronautics and Space Administration, with respect to an invention of Frosch , Nick J. Constantinides
发明人： Robert A. Administrator of the National Aeronautics and Space Administration, with respect to an invention of Frosch , Nick J. Constantinides
IPC分类号： G01S13/12 , G01S13/88
CPC分类号： G01S13/12 , G01S13/882
摘要： An echo tracker/range finder or altimeter in which the pulse repetition frequency (PFR) of a predetermined plurality of transmitted pulses is adjusted so that echo pulses received from a reflecting object are positioned between transmitted pulses and divide their interpulse time interval into two time intervals having a predetermined ratio with respect to each other. The thus-adjusted PRF is related to the range of the reflecting object. More specifically, the invention provides a means whereby the arrival time of a plurality of echo pulses is defined as the time at which a composite echo pulse formed of a sum of the individual echo pulses has the highest amplitude. This arrival time is determined by dividing an interpulse time interval between adjacent transmitted pulses into a predetermined plurality of corresponding time increments. The sum of a plurality of echo pulse portions occurring within each corresponding time increment defines the composite echo pulses, the time increment containing the highest sum defining the arrival time for the plurality of echo pulses. Having determined the arrival time with respect to the interpulse time period, the transmitted PRF is automatically adjusted so that the arrival time divides the interpulse time interval in accordance with a predetermined ratio, this PRF then being related to the range or altitude of the reflecting object. The invention is applicable to radar systems, sonar systems, or any other kind of system in which pulses are transmitted and echoes received therefrom.
摘要翻译：回波跟踪器/测距仪或高度计，其中调整预定多个发射脉冲的脉冲重复频率（PFR），使得从反射对象接收的回波脉冲位于发射脉冲之间并将其脉冲间隔划分成两个时间间隔具有相对于彼此的预定比率。这样调整的PRF与反射物体的范围有关。更具体地，本发明提供了一种装置，其中多个回波脉冲的到达时间被定义为由各个回波脉冲之和形成的复合回波脉冲具有最高幅度的时间。该到达时间通过将相邻发送脉冲之间的脉冲间隔间隔除以预定的多个对应的时间增量来确定。在每个对应的时间增量内发生的多个回波脉冲部分的总和定义了复合回波脉冲，该时间增量包含定义多个回波脉冲的到达时间的最高和。确定相对于脉冲间时间的到达时间后，发送的PRF被自动调整，使得到达时间根据预定比例除以脉冲间隔时间，该PRF然后与反射对象的范围或高度相关。本发明适用于雷达系统，声纳系统或其中传送脉冲并从其接收的回波的任何其他类型的系统。

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