Online monitoring and measurement system for river flow, and flow calculation method

A monitoring measurement and flow calculation technology, applied in the measurement flow/mass flow, liquid/fluid solid measurement, measurement device, etc., can solve the problems of low efficiency, labor and time-consuming, etc., achieve high efficiency, do not affect the channel, do not affect The effect of the flow field

Pending Publication Date: 2019-01-22
宁波市海洋环境监测中心
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  • Abstract
  • Description
  • Claims
  • Application Information

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  • Online monitoring and measurement system for river flow, and flow calculation method
  • Online monitoring and measurement system for river flow, and flow calculation method
  • Online monitoring and measurement system for river flow, and flow calculation method

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Embodiment 1

[0024] System composition:

[0025] as attached figure 1 Shown: a river flow online monitoring and measuring system of the present invention, the system is composed of a flow calculation system 1-1, a flow measuring instrument 1-5 and an installation platform. The flow calculation system 1-1 is installed in the monitoring room above the water surface to control the work of the flow meter; it can also be a simple house or a workstation, mainly to protect the flow calculation system 1-1 from being damaged by man-made damage or weather. resulting in inability to work. At the same time, the data measured by the flow meter is processed and calculated to obtain the flow data; the flow meter is installed on the installation platform and located in the river channel to measure the flow velocity and direction of the water flow; the installation platform is used to install the fixed flow meter , and its bottom is located in the river channel; the current meter of the present invention...

Embodiment 2

[0036] as attached figure 2The schematic diagram of the flow calculation is shown, flow calculation: taking the depth sounder as the origin, the water depth h at the origin is measured by the sounding sensor in the acoustic Doppler current meter or a separately installed sounder, and compared with the water depth during the wet period Comparing the water depth at the origin at the highest water level h1, the water level change δh, ie Δh, is obtained. Therefore, the water depth at any point on the section is H(x)-δh; where H(x) is the water table depth at any point.

[0037] The flow velocity function of the cross-section measured by the flow meter 1-5 in the flow measurement system 1-1, namely V(x, t);

[0038] Consider the area element d at a distance from the origin X at a certain moment S , then d S =[H(x)-δh]·d x , and the flow velocity here is V(x,t), then it flows through d S The flow rate is V(x,t)·d S =V(x,t)·[H(x)-δh]·d x ; where, S is the entire cross-section...

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Abstract

The invention discloses an online monitoring and measurement system for a river flow. The system consists of a flow calculation system, a flow measuring instrument and an installation platform, wherein the flow calculation system is installed in a monitoring room and is positioned above a water surface for controlling the flow measuring instrument to work, meanwhile, data measured by the flow measuring instrument is processed and calculated to obtain flow data; the flow measuring instrument is installed on the installation platform and is positioned in the riverway of the river for measuring the flow velocity and the flow direction of the water flow; and the installation platform is used for installing and fixing the flow measuring instrument, and the bottom of the installation platform ispositioned in the riverway. The system has the advantages of simple structure, accuracy in data measurement, high efficiency, simpleness in installation and the like, and does not affect a flow fieldor a course, and an acoustic Doppler flow measuring instrument can be used for monitoring the flow velocity and the flow direction in real time.

Description

technical field [0001] The invention belongs to the field of hydrological monitoring equipment, and in particular relates to an on-line monitoring and measurement system for river flow and a flow calculation method. Background technique [0002] River flow measurement is one of the important tasks of hydrologists. Traditional river flow measurement methods include manual ship survey, bridge survey, cableway survey and wading survey, etc. The basic principle is to lay out multiple vertical lines on the flow measurement section, measure the water depth on each vertical line and measure the flow velocity at one to several points with a current meter, so as to obtain the average flow velocity of the vertical line, and then obtain the cross-sectional area and cross-sectional average flow velocity, flow rate It is obtained by the product of the cross-sectional area and the average velocity of the cross-section. This traditional method is time-consuming and inefficient. Content...

Claims

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Application Information

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IPC IPC(8): G01F1/66
CPCG01F1/002G01F1/663
Inventor 任敏费岳军钟宇金余娣
Owner 宁波市海洋环境监测中心
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