JPS5673371A - Measuring device for tidal current - Google Patents

Measuring device for tidal current

Info

Publication number
JPS5673371A
JPS5673371A JP14952279A JP14952279A JPS5673371A JP S5673371 A JPS5673371 A JP S5673371A JP 14952279 A JP14952279 A JP 14952279A JP 14952279 A JP14952279 A JP 14952279A JP S5673371 A JPS5673371 A JP S5673371A
Authority
JP
Japan
Prior art keywords
speed
signal
receiving
wave
sea
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP14952279A
Other languages
Japanese (ja)
Inventor
Hideyuki Takahashi
Keinosuke Ueda
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Oki Electric Industry Co Ltd
Original Assignee
Oki Electric Industry Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Oki Electric Industry Co Ltd filed Critical Oki Electric Industry Co Ltd
Priority to JP14952279A priority Critical patent/JPS5673371A/en
Publication of JPS5673371A publication Critical patent/JPS5673371A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
    • G01S15/02—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems using reflection of acoustic waves
    • G01S15/50—Systems of measurement, based on relative movement of the target
    • G01S15/58—Velocity or trajectory determination systems; Sense-of-movement determination systems

Abstract

PURPOSE:To continuously measure the flow speed of the tidal current in the wide sea area by a method wherein an ultrasonic signal is emitted from a wave sending and receiving device fitted in a ship into the sea and a water speed and a ground speed are obtained to perform a vector operation for the flow speed of tidal current. CONSTITUTION:A transmitting frequency is generated through an oscillator 1 and the generated wave is modulated through a pulse number modulating circuit 2. The modulated pulse wave is passed through a transmitting and receiving change-over circuit 3a-3d, and then, is entered into wave sending and receiving devices 4a-4d then, is sent into water as an ultrasonic pulse wave. And the water signal is received as a reflection of plankton micro particles in the sea and the ground signal is received as a reflection signal from the sea bottom in the wave sending and receiving devices 4a-4d, once more. This receiving signal is applied to Doppler displacement detectors 6a-6d via transmitting and receiving change-over circuits 3a-3d and amplifiers 5a-5d and a Doppler shift quantity is detected. Next thereto, a ground speed and a water speed of a ship are obtained from a Doppler shift quantity of these components and therefrom, a speed of a tidal current is obtained. With this constitution, a current speed in the vast sea area can be continuously measured.
JP14952279A 1979-11-20 1979-11-20 Measuring device for tidal current Pending JPS5673371A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14952279A JPS5673371A (en) 1979-11-20 1979-11-20 Measuring device for tidal current

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14952279A JPS5673371A (en) 1979-11-20 1979-11-20 Measuring device for tidal current

Publications (1)

Publication Number Publication Date
JPS5673371A true JPS5673371A (en) 1981-06-18

Family

ID=15476969

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14952279A Pending JPS5673371A (en) 1979-11-20 1979-11-20 Measuring device for tidal current

Country Status (1)

Country Link
JP (1) JPS5673371A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61146118U (en) * 1986-03-04 1986-09-09
WO2014033457A1 (en) * 2012-08-30 2014-03-06 Mojo Maritime Limited Apparatus and method
JP2017227566A (en) * 2016-06-23 2017-12-28 本多電子株式会社 Tidal current meter

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61146118U (en) * 1986-03-04 1986-09-09
JPS627063Y2 (en) * 1986-03-04 1987-02-18
WO2014033457A1 (en) * 2012-08-30 2014-03-06 Mojo Maritime Limited Apparatus and method
JP2017227566A (en) * 2016-06-23 2017-12-28 本多電子株式会社 Tidal current meter

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