System and method for acoustic doppler velocity processing with a phased array transducer

A transducer and phased array technology, applied in the re-radiation of sound waves, radio wave measurement systems, fluid velocity measurement and other directions, can solve the problems of measurement deviation and so on

Active Publication Date: 2009-09-23
特励达仪器有限公司
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  • Abstract
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Problems solved by technology

Measurement bias persists even when long-term averaging has reduced variance to predetermined acceptable limits

Method used

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  • System and method for acoustic doppler velocity processing with a phased array transducer
  • System and method for acoustic doppler velocity processing with a phased array transducer
  • System and method for acoustic doppler velocity processing with a phased array transducer

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Embodiment Construction

[0043] Various aspects and features of the present invention will become more apparent from the following description and appended claims, taken in conjunction with the foregoing drawings. In the drawings, like reference numbers indicate identical or functionally similar elements. In the following description, a detailed description is given to provide a thorough understanding of the disclosed methods and apparatus. However, it will be understood by those of ordinary skill in the art that the disclosed systems and methods may be practiced without these specific details. For example, electrical components are shown in block diagram form in order not to obscure aspects with unnecessary detail. In other instances, components and other structures and techniques may be shown in detail to further explain certain aspects.

[0044] It should also be noted that certain aspects may be described as processes, which are depicted as block diagrams, flowcharts, block diagrams, or block di...

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Abstract

Systems and methods for measuring velocity in fluid are disclosed. In one aspect, a method (900) comprises transmitting a first set of signals of a bandwidth broader than the measuring system, receiving echoes from the first set of signals, obtaining a first velocity estimate based on the echoes, transmitting a second set of signals of a bandwidth narrower than the measuring system, receiving echoes from the second set of signals, obtaining velocity estimates based on the echoes from the second set of signals, selecting one of the velocity estimates based on the first velocity estimate. In another aspect, a method (280) comprises removing substantially a bias related to a first velocity from raw velocity estimates. In another aspect, a method (1900) comprises obtaining a velocity estimate for each of a set of transmitted pings, calculating a velocity based on the sum of the velocity estimates.

Description

technical field [0001] The present invention relates to velocity measurement systems and, in particular, to acoustic Doppler current profilers, other underwater devices such as Doppler logs, and radar applications. Background technique [0002] A current profiler is a sonar system used to remotely measure the velocity of water over varying distances. Current profilers are used in freshwater environments such as rivers, lakes, and estuaries, as well as in saltwater environments such as oceans, to study the effects of water velocity. Accurate measurement of water velocity is important in various fields such as weather forecasting, biological studies of nutrients, environmental studies of sewage diffusion, and commercial exploitation of natural resources including petroleum. [0003] Typically, a current profiler measures the flow velocity of a vertical volume of water for each depth "cell" of water up to a maximum distance, thus producing a "profile" of the velocity of the wa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01P5/24G01S15/60G01S15/58G01S15/89
CPCG01S15/58G01P5/241G01S7/52003
Inventor 马克·A·沃格特布莱尔·H·布仁里弗兰·罗
Owner 特励达仪器有限公司
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