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1. (WO2017149637) TIDAL CURRENT METER

Pub. No.:    WO/2017/149637    International Application No.:    PCT/JP2016/056184
Publication Date: Sat Sep 09 01:59:59 CEST 2017 International Filing Date: Wed Mar 02 00:59:59 CET 2016
IPC: G01S 15/60
G01P 5/24
Applicants: HONDA ELECTRONICS CO., LTD.
本多電子株式会社
Inventors: HIGUCHI Kazuki
樋口和樹
Title: TIDAL CURRENT METER
Abstract:
Provided is a tidal current meter that makes it possible to accurately measure tidal current velocity even if the ship equipped with the tidal current meter is turning. When measuring tidal current velocity, this tidal current meter 12 uses a transducer 31 to transmit an ultrasonic beam TB in a prescribed direction and receive the waves reflected by a scattered body G, or the like, in a water mass positioned at an analysis depth for measurement. A Doppler shift frequency is derived on the basis of a reception signal generated through the reception of the reflected waves by the transducer 31 and the tidal current velocity is calculated on the basis of the Doppler shift frequency. When measuring tidal current velocity, the tidal current meter 12 drives the transducer 31 such that the ultrasonic beam TB is transmitted and received in a prescribed direction that is a prescribed orientation in relation to compass directions.