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1. 发明公开

EP2816359A1 SHIP SPEED METER AND SHIP SPEED MEASUREMENT METHOD 有权
标题翻译： SCHIFFGESCHWINDIGKEITSMESSER UND SCHIFFGESCHWINDIGKEITSMESSVERFAHREN
公开(公告)号：EP2816359A1
公开(公告)日：2014-12-24
申请号：EP13749496.9
申请日：2013-02-04
申请人： Nippon Yusen Kabushiki Kaisha
发明人： ANDO, Hideyuki , HORI, Masatoshi , KAKUTA, Ryo
IPC分类号： G01P5/00 , G01P5/24 , G01P5/08 , B63B49/00
CPC分类号： G01S15/88 , B63B49/00 , B63J2099/008 , G01P3/02 , G01P3/26 , G01P3/50 , G01P5/241 , G01S15/60
摘要： A ship's speed meter for measuring a speed relative to the water of a ship 10, the ship's speed meter including a wave transmitter 1 for emitting a sound wave toward a sea bottom 20, a wave receiver 2 for detecting a plurality of reflected waves, which are reflected waves of the sound wave having been emitted from the wave transmitter 1, reflected by a plurality of reflecting objects 30 positioned at different water depths, and an arithmetic processing unit 4 for calculating a ship's speed relative to the water of the ship 10 based on a frequency difference of the sound wave and the reflected wave. The arithmetic processing unit 4 obtains a change rate of a current velocity in a water depth direction by obtaining current velocities at a plurality of different water depths based on a frequency difference between the sound wave and the plurality of reflected waves, and calculates a current velocity at a water depth at which the change rate is smaller than or equal to a threshold value as the ship's speed relative to the water of the ship 10.
摘要翻译：用于测量相对于水的水速的船舶速度计10，该船舶速度计包括用于向海底20发射声波的波发射器1，用于检测多个反射波的波形接收器2，是从波发射器1发射的声波的反射波，由位于不同水深的多个反射物体30反射的运算处理单元4，用于计算相对于船舶10的水的船舶的速度在声波和反射波的频率差上。算术处理单元4通过基于声波和多个反射波之间的频率差来获得多个不同水深的当前速度来获得水深方向上的当前速度的变化率，并计算当前速度在变化率小于或等于阈值的水深处，作为船舶相对于船舶10的水的速度。

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