CN114169155B - Method for calibrating representative line by depending on section flow velocity - Google Patents
Method for calibrating representative line by depending on section flow velocity Download PDFInfo
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- CN114169155B CN114169155B CN202111415843.4A CN202111415843A CN114169155B CN 114169155 B CN114169155 B CN 114169155B CN 202111415843 A CN202111415843 A CN 202111415843A CN 114169155 B CN114169155 B CN 114169155B
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- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
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- G—PHYSICS
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- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2113/00—Details relating to the application field
- G06F2113/08—Fluids
Abstract
The invention discloses a method for setting representative line by section flow rate, which uses micro adcp or walking adcp to measure a flow, wherein the flow comprises a group of section flow rate, a section is selected as representative line from the section according to a real flow calculated by Q= Σsp [ i ] Area [ i ], a trial flow is obtained according to Q = Area [ Sp ], the position and length of the representative line are continuously changed, cyclic trial calculation is carried out, the representative line close to the real flow is found in the trial calculation result, and the representative line corresponding to the position and length in the trial calculation result is the average flow representative line of the section. By means of miniature or navigation adcp flow measurement results, the installation of the horizontal adcp equipment and the vertical adcp equipment can be effectively guided through trial calculation and optimization of representative lines, unnecessary dismantling, moving and reconstruction are avoided, manpower, material resources and financial resources are saved, and meanwhile potential safety hazards are reduced to the minimum.
Description
Technical Field
The invention is applied to the field of adcp flow measurement, and relates to a method for calibrating a representative line by depending on a section flow velocity.
Background
In conventional adcp equipment installation deployment, planning and guidance by personnel familiar with the hydrologic characteristics of the measuring station are needed to determine the installation position of the equipment, and the basis of the guidance is only intuition and cannot be digitized, which brings inconvenience to later work.
The method can effectively guide the installation of the horizontal adcp equipment and the vertical adcp equipment by means of the trial calculation and the optimization of the representative line by means of the minitype adcp or the navigation adcp current measurement result, avoid unnecessary disassembly, movement and reconstruction, save manpower, material resources and financial resources, and simultaneously minimize the potential safety hazards.
Disclosure of Invention
The method for calibrating the representative line by means of the profile flow rate can effectively guide the installation of the horizontal adcp equipment and the vertical adcp equipment by means of trial calculation and optimization of the representative line by means of micro or navigation adcp flow measurement results, avoid unnecessary disassembly, movement and reconstruction, save manpower, material resources and financial resources, and simultaneously reduce potential safety hazards to the minimum.
In order to achieve the above object, the present invention provides the following technical solution:
1. as shown in fig. 1 and 2, a flow is measured by using a micro adcp or a pilot adcp, the flow includes a set of flow rates of a section (3), a section is selected from the section as a representative line (4) according to a real flow calculated by q=Σsp [ i ] Area [ i ], a trial flow is obtained according to q=area [ Sp ], the position and length of the representative line are continuously changed, cyclic trial calculation is performed, and a representative line corresponding to the position and length in the trial result is found out in the trial result, namely the average flow rate representative line of the section (1).
In practical use, the large cross section shape of the cross section of the measuring flow needs to be measured before the adcp is used for measuring the flow.
In practical use, the flow measurement section is divided into a plurality of rectangular small units, and the section flow velocity is the flow velocity corresponding to the small units.
In actual use, a plurality of flow rates are measured in different water level and different fluctuation water processes, and after a plurality of trial calculations are carried out, the most reasonable representative line is determined.
2. The true flow calculation formula q= Σsp [ i ] area [ i ] is to sum the flow of each section unit to obtain the true flow, and the flow of each section unit is the flow rate of the section unit.
In actual use, due to the reason of the flow measuring equipment, all the flow measuring units, especially the positions of the river side, the river bottom and the position close to the water surface (2), cannot be measured, and a plurality of dead zones exist, and the dead zones are calculated by combining the adjacent units with an empirical formula.
3. Corresponding to the representative line are several cross-section cells which are continuous horizontally or vertically, the position of the representative line is related to the cross-section grid, that is, the position of the center point of a certain cross-section cell grid, and the length of the representative line is an integer multiple of the length of the cross-section cell.
In actual use, if the horizontal adcp device is to be installed on the section, the representative line is subjected to trial calculation in a horizontal mode, and if the base or float adcp is to be installed, the representative line is subjected to trial calculation in a vertical mode.
4. The trial flow calculation formula q=area×sp, area is the Area of the cross section, sp is the average flow velocity representing the line, and is the average value representing the flow velocity of each cross section unit at the position where the line is located.
In practical use, the representative lines all adopt a plurality of continuous units so as to simplify the use of the rating results.
5. The continuous change of the position and length of the representative line is a double-cycle traversing process, wherein the first cycle is to change the position of the representative line, that is, to circularly assume that each section unit is a start unit of the representative line, and the second cycle is to change the length of the representative line, that is, to try out the corresponding calculation flow of the representative line with different lengths on each start unit.
In actual use, the representative line will be selected from the part below the water surface (2) throughout the year, namely only the representative line corresponding to the position below the water surface throughout the year is tried.
In practical use, the representative line cannot be set to a length at will, which is related to the measuring instrument, the length of the representative line cannot exceed the measuring range of the instrument, the representative line cannot be too short, and the representative line which is too short cannot represent the whole section.
In practical use, before the representative line is circularly calculated, the calculation range of the representative line is set according to the specific condition of the flow measurement section and the measurement index of the adopted equipment.
In actual operation, the representative line also needs to avoid the shielding formed by the river bottom.
6. The preliminary result of trial calculation is a structure array, the structure comprises the attributes of X coordinate of the initial unit, Y coordinate of the initial unit, length of the initial unit and trial flow, and the structure with the trial flow closest to the real flow in the array corresponds to the X coordinate of the initial unit, Y coordinate of the initial unit and length of the initial unit, which are representative lines.
The invention has the advantages that:
by means of miniature adcp or sailing adcp flow measurement results, the installation of horizontal adcp equipment and vertical adcp equipment can be effectively guided through trial calculation and optimization of representative lines, unnecessary dismantling, moving and reconstruction are avoided, manpower, material resources and financial resources are saved, and meanwhile potential safety hazards are reduced to the minimum.
Drawings
Fig. 1: the horizontal represents a line.
Fig. 2: the vertical represents a line.
Detailed Description
The method for calibrating the representative line by means of the profile flow rate can effectively guide the installation of the horizontal adcp equipment and the vertical adcp equipment by means of trial calculation and optimization of the representative line by means of the miniature adcp or the navigation adcp flow measurement result, avoid unnecessary disassembly, movement and reconstruction, save manpower, material resources and financial resources, and simultaneously reduce the potential safety hazards to the minimum.
In order to achieve the above object, the present invention provides the following technical solution:
1. as shown in fig. 1 and 2, a flow is measured by using a micro adcp or a pilot adcp, the flow includes a set of flow rates of a profile unit (3), a section is selected from the profile as a representative line (4) according to a real flow calculated by q=Σsp [ i ]. Area [ i ], a trial flow is obtained according to q=area [ Sp ], the position and length of the representative line are continuously changed, cyclic trial calculation is performed, and a representative line corresponding to the position and length in the trial result is found out in the trial result, namely the average flow rate representative line of the profile (1).
In practical use, the large cross section shape of the cross section of the measuring flow needs to be measured before the adcp is used for measuring the flow.
In practical use, the flow measurement section is divided into a plurality of rectangular small units, and the section flow velocity is the flow velocity corresponding to the small units.
In actual use, a plurality of flow rates are measured in different water level and different fluctuation water processes, and after a plurality of trial calculations are carried out, the most reasonable representative line is determined.
In particular, the method comprises the following steps of: the water level, the position of the representative line (starting point distance and elevation), the length of the representative line, the real flow, the trial flow and the flow measurement scheme designer need to judge and select an optimal scheme from the optimal results corresponding to a plurality of real flow, combining the conditions of the measured section, the terrain, the upstream and downstream, and the like, and guiding the installation of the horizontal adcp or the vertical adcp.
2. The real flow calculation formula q= Σsp [ i ] area [ i ] is to sum the flow of each section unit (3) to obtain the real flow, and the flow of each section unit is the flow rate of the section unit.
In actual use, due to the reason of the flow measuring equipment, all the flow measuring units, especially the positions of the river side, the river bottom and the position close to the water surface (2), cannot be measured, and a plurality of dead zones exist, and the dead zones are calculated by combining the adjacent units with an empirical formula.
In the specific implementation, the area of the cut-off section unit which is cut off into incomplete section units is calculated according to the actual value after the cut-off.
3. Corresponding to the representative line are several cross-section cells which are continuous horizontally or vertically, the position of the representative line is related to the cross-section grid, that is, the position of the center point of a certain cross-section cell grid, and the length of the representative line is an integer multiple of the length of the cross-section cell.
In actual use, if the horizontal adcp device is to be installed on the section, the representative line is subjected to trial calculation in a horizontal mode, and if the base or float adcp is to be installed, the representative line is subjected to trial calculation in a vertical mode.
4. The trial flow calculation formula q=area×sp, area is the Area of the cross section, sp is the average flow velocity representing the line, and is the average value representing the flow velocity of each cross section unit at the position where the line is located.
In practical use, the representative line often employs several units in succession to simplify the use of the calibration effort.
In practice, the average flow velocity of a representative line after the calibration of the present method will be referred to as the average flow velocity of the entire cross-section.
5. The continuous change of the position and length of the representative line is a double-cycle traversing process, wherein the first cycle is to change the position of the representative line, that is, to circularly assume that each section unit is a start unit of the representative line, and the second cycle is to change the length of the representative line, that is, to try out the corresponding calculation flow of the representative line with different lengths on each start unit.
In actual use, the representative line will be selected from the part below the water surface (2) throughout the year, namely only the representative line corresponding to the position below the water surface throughout the year is tried.
In practice, the water surface will fluctuate with the images of seasons, precipitation, flood discharge, dam interception, etc., and the representative line will need to be selected to be 0.5 meter or more below the water surface (see the water depth of the navigation ADCP).
In practical use, the representative line cannot be set to a length at will, which is related to the measuring instrument, the length of the representative line cannot exceed the measuring range of the instrument, the representative line cannot be too short, and the representative line which is too short cannot represent the whole section.
In practical use, before the representative line is circularly calculated, the calculation range of the representative line is set according to the specific condition of the flow measurement section and the measurement index of the adopted equipment.
In actual operation, the representative line also needs to avoid the shielding formed by the river bottom.
6. The preliminary result of trial calculation is a structure array, the structure comprises the attributes of X coordinate of the initial unit, Y coordinate of the initial unit, length of the initial unit and trial flow, and the structure with the trial flow closest to the real flow in the array corresponds to the X coordinate of the initial unit, Y coordinate of the initial unit and length of the initial unit, which are representative lines.
In the specific implementation, the X coordinate and the Y coordinate corresponding to the representing unit are in one-to-one correspondence with the starting point distance and the elevation in the flow measurement.
In practice, the horizontal adcp device or the vertical adcp device will be installed with reference to the representative unit, these devices only collect flow rates on the representative unit, flow rates of other profiles are not collected, and even if they are collected, they are not signaled, and they do not participate in the calculation of the final flow rate.
The invention has the advantages that:
by means of miniature or navigation adcp flow measurement results, the installation of the horizontal adcp equipment and the vertical adcp equipment can be effectively guided through trial calculation and optimization of representative lines, unnecessary dismantling, moving and reconstruction are avoided, manpower, material resources and financial resources are saved, and meanwhile potential safety hazards are reduced to the minimum.
Claims (3)
1. The method for calibrating the representative line by depending on the profile flow rate is characterized by comprising the following steps of: measuring a flow by using a miniature adcp or a pilot adcp, wherein the flow comprises a group of section flow rates, obtaining a real flow according to Q1 = Σsp [ i ] Area [ i ], selecting a section from the section as a representative line, obtaining a test flow according to Q2 = Area [ Sp ], continuously changing the position and the length of the representative line, performing cyclic test, and finding the part closest to the real flow in a test result, wherein the representative line corresponding to the position and the length in the test result is the average flow rate representative line of the section;
the real flow calculation formula Q1= Σsp [ i ] area [ i ] is to accumulate the flow of each section unit to obtain the real flow, sp [ i ] is the flow velocity of the section unit, and area [ i ] is the area of the section unit;
corresponding to the representative line are several section cells which are continuous horizontally or vertically, the position of the representative line is related to the section grid, the position is the center point position of the initial section cell grid of the representative line, and the length of the representative line is an integral multiple of the length of the section cell;
the trial flow calculation formula q2=area×sp, area is the Area of the cross section, sp is the average flow velocity representing the line, and is the average value representing the flow velocity of each cross section unit at the position where the line is located.
2. A method of profiling a line depending on profile flow rate as claimed in claim 1, characterised by: the continuous change of the position and length of the representative line is a double-cycle traversing process, wherein the first cycle is to change the position of the representative line, that is, to circularly assume that each section unit is a start unit of the representative line, and the second cycle is to change the length of the representative line, that is, to try out the corresponding calculation flow of the representative line with different lengths on each start unit.
3. A method of profiling a line depending on profile flow rate as claimed in claim 1, characterised by: the preliminary result of trial calculation is a structure array, the structure comprises the attributes of X coordinate of the initial unit, Y coordinate of the initial unit, length of the initial unit and trial flow, and the structure with the trial flow closest to the real flow in the array corresponds to the X coordinate of the initial unit, Y coordinate of the initial unit and length of the initial unit, which are representative lines.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| KR20110116765A (en) * | 2010-04-20 | 2011-10-26 | 주식회사 하이드로소닉 | Ultrasonic flow measuring method and apparatus for canal |
| CN112948767A (en) * | 2021-02-24 | 2021-06-11 | 长江水利委员会水文局 | Online flow measurement scheme recommendation method based on long-sequence ADCP flow model |
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| US6138810A (en) * | 1999-08-04 | 2000-10-31 | Ford Global Technologies, Inc. | Method for controlling a hydraulic valve of an automatic transmission |
| GB2392731B (en) * | 2002-09-03 | 2005-03-30 | Schlumberger Holdings | Method for interpreting data measured in a hydrocarbon well in production |
| US8936762B2 (en) * | 2009-09-01 | 2015-01-20 | Trustees Of Boston University | High throughput multichannel reader and uses thereof |
| CN110112785B (en) * | 2019-05-31 | 2022-11-04 | 国电南瑞科技股份有限公司 | Comprehensive energy system simplified model design method based on equilibrium transformation theory |
| CN110297104A (en) * | 2019-06-04 | 2019-10-01 | 长江水利委员会水文局 | A kind of river represents vertical velocity profile real-time online measuring method |
| CN110906992B (en) * | 2019-11-27 | 2021-12-24 | 长江水利委员会水文局 | River flow measuring method based on horizontal ADCP measuring vertical line flow velocity distribution |
| CN113406354A (en) * | 2021-06-21 | 2021-09-17 | 湖南国天电子科技有限公司 | Data optimization method and system for ADCP |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20110116765A (en) * | 2010-04-20 | 2011-10-26 | 주식회사 하이드로소닉 | Ultrasonic flow measuring method and apparatus for canal |
| CN112948767A (en) * | 2021-02-24 | 2021-06-11 | 长江水利委员会水文局 | Online flow measurement scheme recommendation method based on long-sequence ADCP flow model |
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