A system and method for two-dimensional flow velocity and flow measurement in a river

A flow measurement and flow velocity technology, which is applied in the field of two-dimensional flow velocity and flow measurement systems in rivers, can solve problems such as the inability to guarantee the real-time accuracy and validity of the measured flow data, and achieve the effects of convenient installation, commissioning and maintenance, small size, and improved accuracy

Active Publication Date: 2020-03-31
HANGZHOU KAIHONG FLUID TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to address the deficiencies in the prior art and provide a two-dimensional flow rate and flow measurement system and method for rivers. The system is based on the two-dimensional flow rate ADCP product developed by phased array scanning technology, and utilizes underwater mechanical rotating equipment and acoustic The combined design of the Doppler velocity profiler expands the traditional one-dimensional velocity profile data into two-dimensional scanning velocity data, and uses the fluid dynamics calculation model to calculate and fit the river flow to obtain more accurate flow data. The existing measurement system cannot guarantee the real-time accuracy and validity of the measured flow data.

Method used

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  • A system and method for two-dimensional flow velocity and flow measurement in a river
  • A system and method for two-dimensional flow velocity and flow measurement in a river
  • A system and method for two-dimensional flow velocity and flow measurement in a river

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0159] In Example 1, when nitSize=0.1,

[0160] The relevant parameters of the acoustic Doppler current meter are set as follows:

[0161] MinRange=0.5; the nearest range, unit: m

[0162] MaxRange=15; maximum range, unit: m

[0163] ADCPdepth=0.5; Acoustic Doppler current meter measures layer thickness, unit: m

[0164] ADCPNoP=50; the number of layers measured by the acoustic Doppler current meter

[0165] Adjustable coefficient:

[0166] Manning=0.05; Manning rough coefficient;

[0167] Karman=0.41; Karman constant=0.41

[0168] mExp=6; empirical constant m

[0169] Gravity=9.8; gravity acceleration

[0170] Beta=1; 1-10 anisotropic turbulence constant

[0171] Init.ADCPPosition=[6,2.8]; Acoustic Doppler current meter installation position [distance from section 0 coordinate point and water depth], unit: m

[0172] Get the measured picture as Figure 11 shown.

Embodiment 2

[0173] In Example 2, when nitSize=0.5,

[0174] The relevant parameters of the acoustic Doppler current meter are set as follows:

[0175] MinRange=0.5; the nearest range, unit: m

[0176] MaxRange=15; maximum range, unit: m

[0177] ADCPdepth=0.5; Acoustic Doppler current meter measures layer thickness, unit: m

[0178] ADCPNoP=50; the number of layers measured by the acoustic Doppler current meter

[0179] Adjustable coefficient:

[0180] Manning=0.05; Manning rough coefficient;

[0181] Karman=0.41; Karman constant=0.41

[0182] mExp=6; empirical constant m

[0183] Gravity=9.8; gravity acceleration

[0184] Beta=1; 1-10 anisotropic turbulence constant

[0185] Init.ADCPPosition=[6,2.8]; Acoustic Doppler current meter installation position [distance from section 0 coordinate point and water depth], unit: m

[0186] Get the measured picture as Figure 12 shown.

[0187] There are two sets of examples of the effects of velocity simulation and assimilation:

[0188...

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Abstract

The invention discloses a river channel two-dimensional flow velocity and flow measuring system. The system comprises an acoustic Doppler current profiler, a mechanical rotation driving device, an embedded control and data acquisition device and a host computer, the host computer is connected with the embedded control and data acquisition device, the embedded control and data acquisition device isconnected with the mechanical rotation driving device, and the mechanical rotation driving device is connected with the acoustic Doppler current profiler. A river channel two-dimensional flow velocity and flow measuring method includes following steps: (a) flow velocity scanning; (b) flow velocity calculation; and (c) flow calculation. According to the system, the design of the combination of theunderwater mechanical rotation device and the acoustic Doppler current profiler is employed, conventional one-dimensional flow velocity profile data is extended to two-dimensional scanning flow velocity data, and the calculation fitting of the river channel flow is performed by employing a calculation model of fluid dynamics so that more accurate flow data is obtained, and the problem that the conventional measuring system cannot guarantee timeliness, accuracy and validity of measured flow data is solved.

Description

technical field [0001] The invention relates to a two-dimensional flow velocity and flow measurement system and method of a river channel. Background technique [0002] The traditional ADCP generally adopts a fixed installation on the shore and emits sound waves horizontally to obtain one-dimensional flow velocity profile data. This flow velocity data is called the index flow velocity. The index flow velocity is poorly representative of the average flow velocity of the entire river section, and when the water level changes, the relationship between the index flow velocity and the average flow velocity of the section will change fundamentally, and the relationship between the two must be recalibrated to ensure the data availability of the flow measurement system , which will lead to a large consumption of manpower and material resources, and cannot guarantee the real-time accuracy and validity of the measured flow data. In addition, due to floods, siltation and other reasons...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01P5/24G01F1/66
Inventor 杨波方雷郑豪锋
Owner HANGZHOU KAIHONG FLUID TECH CO LTD
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