A broadband adcp flow measurement method with a large flow velocity measurement range
A technology with a large measurement range and a large flow rate, which is applied in the direction of fluid velocity measurement, velocity/acceleration/shock measurement, and measurement devices. It can solve the problems of small flow measurement range and phase ambiguity, and achieve the effect of eliminating phase (flow velocity) ambiguity.
Active Publication Date: 2021-08-06
HANGZHOU KAIHONG FLUID TECH CO LTD
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[0005] The purpose of the present invention is to provide a broadband ADCP flow measurement method with a large flow velocity measurement range, which overcomes the disadvantages of the small flow measurement range of the traditional broadband flow measurement method, and solves the problem of phase ambiguity while maintaining the accuracy of broadband flow measurement. Extend the flow measurement range of broadband flow measurement
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[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments of the present invention belong to the protection scope of the present invention.
[0019] Those skilled in the art should understand that in the disclosure of the present invention, the terms "vertical", "transverse", "upper", "lower", "front", "rear", "left", "right", " The orientation or positional relationship indicated by "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present invention and The above terms should not be con...
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The present invention provides a wide-band ADCP flow measurement method with a large flow velocity measurement range. The method uses the first frequency offset measured in the adjacent first time period to provide indication and correction for the phase difference measured in the second time period, and Carry out sequential tracking measurement of flow velocity, wherein when the first time period is the initial measurement, use the narrow-band non-coherent current measurement method to measure a certain water layer; when the first time period is the non-initial measurement, use the last broadband The frequency offset of the current measurement results is used as the first frequency offset, and in the second time period, the same water layer is measured twice using the broadband current measurement method. This method overcomes the shortcoming of the small flow measurement range of the traditional broadband flow measurement method, solves the problem of phase ambiguity while maintaining the accuracy of the broadband flow measurement, and expands the flow measurement range of the broadband flow measurement.
Description
technical field [0001] The invention relates to the field of flow measurement, in particular to a broadband ADCP flow measurement method with a large flow velocity measurement range. Background technique [0002] ADCP, also known as the Acoustic Doppler Velocity Profiler, emits sound waves into the water, and the scatterers in the water scatter the sound waves. ADCP receives the echo signals returned by the scatterers, and calculates the Velocity is widely used to measure the velocity of water in oceans, lakes, and estuaries. The current ADCP flow measurement generally uses the complex autocorrelation algorithm. The complex autocorrelation algorithm mainly uses the phase relationship between the two echo signals to obtain the frequency information through the instantaneous derivative of the phase. [0003] According to the different signal forms and processing methods, ADCP flow measurement can be divided into narrowband flow measurement and broadband flow measurement. Spe...
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IPC IPC(8): G01P5/24
CPCG01P5/241
Inventor 张明苏南郑豪峰
Owner HANGZHOU KAIHONG FLUID TECH CO LTD