ADCP

An Acoustic Doppler Current Profiler (ADCP or ADP), is a type of sonar that attempts to produce a record of water current velocities over a range of depths.Depending on the field application, ADCP may use 2, 3, 4, or more ceramic transducers, which work in water similar to loud speakers in air. These transducers are aimed in such a way that the monofrequency, sound pulse they produce travels through the water in different, but known directions. As the echo of the sound is returned by scatterers in the water, it is shifted in frequency due to the Doppler effect. ADCPs can be configured for side-looking into rivers & canals for long term continuous discharge measurements, mounted on boats for instantanteous surveys in the ocean or rivers of currents & depth, and mounted on the seabed for long term current & wave studies.
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Das heute wichtigste Messgerät zur Strömungsmessung ist der Ultraschall-Doppler-Profil-Strömungsmesser (engl.: Acoustic Doppler Current Profiler (ADCP)), ein Aktivsonar, das die Doppler-Frequenzverschiebung des Nachhalls von Streukörpern im Wasser (vorwiegend Plankton) zur Bestimmung der lokalen Strömungsgeschwindigkeit nutzt. Grundsätzlich ist die Auflösung durch die Nachhallunschärfe-Relation
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Een ADCP (Acoustic Doppler Current Profiler, akoestische dopplerstroommeter) is een soort sonar die wordt gebruikt om zeestromingen te meten tot op grote diepte.
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Acoustic Doppler Current Profiler - An instrument that obtains profiles of water velocity by transmitting sound of known frequency into the water and measuring the Doppler shift of reflections from scatterers