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Method and system for measuring ocean current profile flow velocity using acoustic Doppler ocean current section plotter

A technology of Doppler ocean current and profiler, which is applied in the direction of radio wave measurement system, fluid velocity measurement, measuring device, etc., and can solve problems such as phase ambiguity, insufficient Doppler ocean current profiler, and inaccurate velocity measurement

Inactive Publication Date: 2005-06-29
INST OF ACOUSTICS CHINESE ACAD OF SCI
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Problems solved by technology

[0007] However, there are deficiencies in the broadband acoustic Doppler current profiler installed at moorings
In actual work, it is often desired to install a wideband acoustic Doppler current profiler on a ship to measure the flow field in a large area of ​​sea area during sailing. At this time, the profiler measures the vector sum of ship velocity and current velocity. The speed of the ship is greater than the velocity of the flow, often making this velocity vector sum greater than the fuzzy velocity V a , resulting in phase ambiguity and velocity inaccuracy

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  • Method and system for measuring ocean current profile flow velocity using acoustic Doppler ocean current section plotter
  • Method and system for measuring ocean current profile flow velocity using acoustic Doppler ocean current section plotter
  • Method and system for measuring ocean current profile flow velocity using acoustic Doppler ocean current section plotter

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Embodiment Construction

[0032] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific methods.

[0033] Such as figure 1 As shown, when the acoustic Doppler ocean current profiler measures fluid velocity, it is mounted on a carrier (ship) 100 , and the acoustic Doppler ocean current profiler generally includes a wet end 200 and a dry end 600 . The wet end includes a transducer array 300, an electronic extension 400 and a sensor 500; the dry end 600 includes a terminal computer 601 and several peripheral devices, which are installed on the water surface. The acoustic Doppler ocean current profiler transmits the beam 101 underwater through the transducer array 300 , and receives the reflected signal of the fluid 103 and / or the seabed 102 , and obtains the velocity of the fluid 103 after being processed by the electronic extension 400 .

[0034] The schematic diagram of the device of the acoustic Doppler current profiler is shown in ...

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Abstract

This invention discloses a Doppler sea flow section flow speed test method, which comprises the following steps: first to pre-estimate the ship speed and flow speed vector and the valuation V#-[E] of V and to set first time interval T#-[1] between two sub-impulse according to the valuation; to get the pre-valuation V#-[S] of the ship speed and flow speed vector and V according to first time interval; to set second time interval T#-[2] according to pre-valuation V#-[S]; to choose the relative impulse emission code according to second time interval T#-[2] and to adopt relative impulse pair covariance method to test flow speed to get the ship speed and flow speed vector and V accurate value V#-[P]; final to get flow speed by minus the ship speed from the measurement results.

Description

technical field [0001] The invention relates to the measurement of the flow velocity of the ocean current profile, and more specifically, relates to a method for measuring the flow velocity by an acoustic Doppler ocean current profiler and a wide-band acoustic Doppler ocean current profiler. Background technique [0002] The Broadband Acoustic Doppler Current Profiler is an acoustic device for measuring the velocity of the ocean current profile. At present, the signal processing method of the broadband acoustic Doppler current profiler is the correlation pulse pair covariance method. The pulse pair transmitted by it is composed of two sub-pulses, and each sub-pulse includes multiple pulse elements. Find the corresponding pulse elements in the two sub-pulses The phase of the correlation function between them is used to obtain the flow velocity. (See literature [1]: Zhu Weiqing, etc., "Spectral moment estimates of broadband backscattering acoustic wave in moving medium", Chin...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01P5/24G01S7/52G01S15/58
Inventor 朱维庆潘锋朱敏汪玉玲
Owner INST OF ACOUSTICS CHINESE ACAD OF SCI
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