CN108775936A - A kind of flow measurement device, metering method and measurement and control integration gate system - Google Patents
A kind of flow measurement device, metering method and measurement and control integration gate system Download PDFInfo
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- CN108775936A CN108775936A CN201810246736.5A CN201810246736A CN108775936A CN 108775936 A CN108775936 A CN 108775936A CN 201810246736 A CN201810246736 A CN 201810246736A CN 108775936 A CN108775936 A CN 108775936A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/66—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B7/00—Barrages or weirs; Layout, construction, methods of, or devices for, making same
- E02B7/20—Movable barrages; Lock or dry-dock gates
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Abstract
The present invention relates to a kind of flow measurement devices,Metering method and measurement and control integration gate system,The flow measurement device includes surveying liquid case,Ultrasonic transducer and sonar,Wherein ultrasonic transducer and sonar setting is on surveying liquid case,Ultrasonic transducer is used to obtain the flow velocity of liquid,Sonar is used to obtain the sectional area and flow revisory coefficient of liquid flowing,According to the flow velocity of liquid,The sectional area and flow revisory coefficient of liquid flowing obtain fluid flow,The present invention is on the basis of existing measurement and control integration gate surveys water tank,Optimization for Ultrasonic Wave transducer layout,Increase sonar to measure sectional area and flow revisory coefficient,Ultrasonic transducer measurement result is modified,Significantly improve the precision of flow measurement,Precision reaches 99% or more,Measurement and control integration gate system of the present invention can mitigate the working strength of watermaster,Reduce water distribution dispute,Improve water distribution management level,Make full use of Water Resources Irrigation,Improve Irrigation Project Design benefit.
Description
Technical field
The present invention relates to a kind of flow measurement device, metering method and measurement and control integration gate systems, belong to flow measurement
And observation and control technology field.
Background technology
As irrigated area automates the proposition of concept, to water quantity monitoring, more stringent requirements are proposed with control, is used at present
Open channel measure drainage facility mainly and include two classes, the water quantity monitoring equipment that a kind of amount of being water section is laid, including water-level gauge and
The metering effect of flowmeter, measurement drainage facility simple at present is general, mainly by open channel condition, equipment itself precision, manager
Formula etc. limits, and there is no preferable improved procedure at present；One kind is measurement and control integration gate, including integrated form and combined type two
Kind.
Measurement and control integration gate system mainly transports Modern Tracking Technology's, computer networking technology and Advanced Control Techniques
For the automatic measurement of the parameters such as gate and flow, calculating, control and adjusting, come realize the reasonable conveying of water resource, restraining and
Distribution.Existing measurement and control integration gate uses ultrasonic wave time difference method, in conjunction with acoustic wave array flow measurement technology, to surveying in sink
Flow carries out 3D segmentations, and result is overlapped, in the hope of flow speed data, data on flows is acquired in conjunction with gatage value.
Since the Northwest is larger to measurement and control integration gate demand, therefore, herein for the Northwest's natural environment to existing
Some measurement and control integration gates are analyzed.The main hydrological characteristics in the Northwest：1, water is small, mostly ephemeral stream, by ice
The influence of snowmelt, Summer Precipitation are big；2, SEA LEVEL VARIATION is influenced by temperature, and summer water, water level are higher；3, drought,
The silt content in river is big.4, based on ephemeral stream, winter generally stops.Silt, floating material in flow etc. are surveyed in water tank
The mud of accumulation can all influence measurement accuracy；Meanwhile theoretically Array Method being used to measure flow, it is desirable that cut off the water supply plane as possible
It is more, that is, it requires energy converter more as possible, not so can have measurement blind area, but survey water tank mounting condition is limited, can only install a fixed number
The energy converter of amount, furthermore, if energy converter spacing is too small, adjacent energy converter can influence each other.
Ultrasonic wave is in communication process, under the action of fluid molecule, solid particle, suspended matter and bubble, some
Acoustic energy can irreversibly be converted into the energy of the other forms of medium, be exactly that some energy is absorbed for ultrasonic wave
?；On the other hand, when ultrasonic wave is propagated in medium, if in medium containing a large amount of scattering particles (in such as fluid media
The nutty structure defect in minute bubbles, solid medium, dopant in suspended particles, liquid etc.), then a part of ultrasonic wave will
It is scattered and, no longer advanced along original direction, an only remaining part is moved on along former direction, thus formed
Scatter attenuation, and the scatterers itself such as solid particle, suspended matter become sound source, and acoustic energy can be radiated to all directions.
Therefore, it can constantly decay when ultrasonic wave is propagated in water, or even can be flooded by noise.
Therefore only rely on the flow that ultrasonic transducer measures and can reach the 95% of requirement in laboratory environment, but in reality
Since there are many required precisions that influence factor is extremely difficult to 95% in application environment.
It there is now the product for civilian use using sonar technique, there are mainly two types of：One is sonar flowmeter is installed in pipeline
On measure flow in pipeline, this measurement of discharge method is not influenced by lining, fouling or the ore pulp in pipeline be magnetic；It is another
It is sonar fish deteclor, fish deteclor is positioned using fishing sonar, detectable bottom state, profile, composition and the depth of water, and is emitted
To cell phone apparatus, the information such as water-bed depth, water-bed landform, vegetation state, water-bed temperature, shoal of fish positioning can be accurately known.But
Both products can not all be used for measuring open channel flow rate, and the method for open channel flow rate is measured in existing literature data, and there are two main classes：
One kind is to lay water quantity monitoring equipment, including water-level gauge (i.e. water level method measurement of discharge) and flowmeter in amount water section
(i.e. velocity_area method measurement of discharge), such method measurement of discharge needs carry out under hydrostatic state.It is needed with water level method measurement of discharge
One section of flow-measuring weir is built on open channel, by monitoring the water level of sluice stream on-line, recycles hydraulic formula that can calculate logical
Cross the flow of weir notch；It is not required to build measuring structure with velocity_area method measurement of discharge, by measuring cross-section of river flow velocity and crossing water
Cross-sectional area can acquire flow.It is limited by open channel condition, equipment itself precision, way to manage etc., such mode is measured
Effect is undesirable.
One kind is measurement and control integration gate, integrates flowmeter and regulating gate, wherein the function of flowmeter is by survey water
Case undertakes.The equipment uses acoustic wave array flow measurement technology, and ultrasonic transducer is installed in water tank, will survey space in water tank
Multiple planes of cutting off the water supply are cut into, average water flow velocity is calculated.Gatage value combines survey tank size to calculate water section.According to
Flow velocity calculates flow value with water section is crossed.The flow speed value calculated depends on ultrasonic transducer precision and quantity, and precision is got over
Height is as a result more accurate；Quantity is more, and the plane of cutting off the water supply being cut into is more, and corresponding calculating process is more complicated, the mean flow rate obtained
Value is also more accurate.Such method is crossed water section and is directly determined by gatage and survey water tank width, is deposited due to surveying water tank bottom
In impurity effects such as mud, directly resulting in flow measurement, there are relatively large deviations.
Invention content
It is an object of the invention to overcome the drawbacks described above of the prior art, a kind of flow measurement device is provided, by using
Ultrasonic array flow measurement technology and sonar technique, can accurate measurement fluid flow, and the flow measurement device structure
Simply, small, it is suitable for the measurement of various fluid floies, application field is wide, highly practical.
Another object of the present invention is to provide a kind of flow metering method.
A further object of the present invention is to provide a kind of measurement and control integration gate system.
What the above-mentioned purpose of the present invention was mainly achieved by following technical solution：
A kind of flow measurement device, including survey liquid case, ultrasonic transducer and sonar, wherein ultrasonic transducer and sonar
On surveying liquid case, ultrasonic transducer is used to obtain the flow velocity of liquid for setting, and sonar is used to obtain the sectional area of liquid flowing, root
The sectional area flowed according to the flow velocity and liquid of the liquid obtains fluid flow.
In above-mentioned flow measurement device, the sonar is additionally operable to obtain flow revisory coefficient, according to the flow velocity of liquid, liquid
The sectional area and flow revisory coefficient of body flowing obtain fluid flow.
Further include controller in above-mentioned flow measurement device, the controller receives the survey of ultrasonic transducer input
The flow velocity that data obtain liquid is measured, the measurement data for receiving sonar input obtains the sectional area of liquid flowing, and according to the liquid
The sectional area of flow velocity and the liquid flowing of body obtains fluid flow.
Further include controller in above-mentioned flow measurement device, the controller receives the survey of ultrasonic transducer input
The flow velocity that data obtain liquid is measured, the measurement data for receiving sonar input obtains sectional area and the flow revision system of liquid flowing
Number, and the sectional area and flow revisory coefficient that are flowed according to the flow velocity of the liquid, liquid obtain fluid flow.
In above-mentioned flow measurement device, the ultrasonic transducer be two groups, survey liquid case in it is diagonally positioned, i.e., its
In one group of side wall for being positioned close to survey liquid case open end internal face, another group is positioned close to survey liquid case that another is opened
The internal face of another side wall opposite with the side wall at mouth end；One ultrasonic transducer of one of which with another group
One ultrasonic transducer constitutes a pair of of ultrasonic transducer, forms N altogether to ultrasonic transducer, N is positive integer, N >=1.
In above-mentioned flow measurement device, the value of the N is 3~6.
In above-mentioned flow measurement device, if the height for surveying liquid case is b, the number of ultrasonic transducer meets following item
Part：
In above-mentioned flow measurement device, plane where each pair of ultrasonic transducer is not installed with one of survey liquid case super
The side wall surface of acoustic wave transducer is parallel.
In above-mentioned flow measurement device, the sonar is two, and the internal face in a side wall for surveying liquid case is arranged, and
It is symmetrical arranged as symmetric points using the side wall surface center.
In above-mentioned flow measurement device, side wall surface and the setting ultrasonic transducer of the survey liquid case of the setting sonar
The side wall surface for surveying liquid case is different lateral face.
Further include water inlet in above-mentioned flow measurement device, the water inlet is tapered inlet, and liquid is being surveyed in setting
The liquid feeding end of case.
In above-mentioned flow measurement device, the measurement data that the controller receives ultrasonic transducer input obtains liquid
The specific method is as follows by flow velocity v：
And meet：k1+k2+…kN=2N
Wherein：v1For the flow velocity that the 1st pair of ultrasonic transducer obtains, k1The power of flow velocity is obtained for the 1st pair of ultrasonic transducer
Weight coefficient；v2For the flow velocity that the 2nd pair of ultrasonic transducer obtains, k2The weight system of flow velocity is obtained for the 2nd pair of ultrasonic transducer
Number；vNFor the flow velocity that N obtains ultrasonic transducer, kNThe weight coefficient of flow velocity is obtained to ultrasonic transducer for N.
In above-mentioned flow measurement device, the 1st pair, the 2nd pair ... the flow velocity v that N obtains ultrasonic transducer1、v2…
vNSpecific formula for calculation it is as follows：
Wherein:C is the velocity of sound in detected fluid；A is the width for surveying liquid case；θ1For the angle the 1st between of ultrasonic transducer
Degree, θ2Angle, θ for the 2nd between of ultrasonic transducerNFor angles of the N between ultrasonic transducer；Δt1For the 1st pair of ultrasound
The concurrent-countercurrent time difference for the liquid that wave transducer measures；Δt2When the concurrent-countercurrent of the liquid measured for the 2nd pair of ultrasonic transducer
Between it is poor；ΔtNFor the concurrent-countercurrent time difference of the N liquid measured to ultrasonic transducer.
In above-mentioned flow measurement device, the measurement data that the controller receives sonar input obtains cutting for liquid flowing
The method of area is：
The survey liquid case operating mode image obtained using sonar is crossed in surveying liquid case operating mode image in the operating mode plan view of the mouth of a river
Coordinate system is established, obtains surveying the curvilinear equation that liquid case crosses bottom sludge surface in the operating mode plan view of the mouth of a river, be become silted up according to the bottom
The curvilinear equation on mud surface obtains the sectional area of liquid flowing.
In above-mentioned flow measurement device, the measurement data that the controller receives sonar input obtains cutting for liquid flowing
The specific method is as follows for area：
(1), it obtains surveying liquid case operating mode image using sonar, mouth of a river operating mode plan view is crossed in liquid case operating mode image if surveying
A vertex be coordinate origin, surveys liquid case width direction be x-axis, short transverse is y-axis, survey liquid case width be a, be highly b,
Flashboard Lift is h, obtains surveying liquid case and crosses the curvilinear equation y=f (x) on bottom sludge surface in the operating mode plan view of the mouth of a river, 0≤
x≤a；
(2), the sectional area A of liquid flowing is calculated according to the curvilinear equation on the bottom sludge surface：
In above-mentioned flow measurement device, the measurement data that the controller receives sonar input obtains flow revisory coefficient
Method be：
The survey liquid case operating mode image obtained using sonar is established coordinate system in surveying liquid case operating mode image, is surveyed
The surface equation that liquid case bottom sludge surface is surveyed in liquid case operating mode image, according to the curved surface on the survey liquid case bottom sludge surface
Equation obtains flow revisory coefficient.
In above-mentioned flow measurement device, the measurement data that the controller receives sonar input obtains flow revisory coefficient
The specific method is as follows：
(1), it obtains surveying liquid case operating mode image using sonar, a vertex of liquid case is surveyed if surveying in liquid case operating mode image
For coordinate origin, survey liquid case width direction is x-axis, and short transverse is y-axis, and depth direction is z-axis, it is known that survey liquid case width is a,
Height is b, depth c, and the surface equation for obtaining surveying survey liquid case bottom sludge surface in liquid case operating mode image is
(2), flow revisory coefficient K is calculated according to the surface equation on the survey liquid case bottom sludge surface：
In above-mentioned flow measurement device, sectional area and flow that the controller is flowed according to flow velocity, the liquid of liquid
The specific formula that revisory coefficient calculates fluid flow is as follows：
Q=K × A × v
Wherein：Q is fluid flow, and A is the sectional area of liquid flowing, and v is flow rate of liquid, and K is flow revisory coefficient.
A kind of flow metering method, including：
The flow velocity of liquid is obtained using ultrasonic transducer；
The sectional area of liquid flowing is obtained using sonar；
The sectional area flowed according to the flow velocity of the liquid and liquid obtains the flow of liquid.
In above-mentioned flow metering method, further include：
Flow revisory coefficient is obtained using sonar；
The sectional area and flow revisory coefficient flowed according to the flow velocity of the liquid, liquid obtains fluid flow.
In above-mentioned flow metering method, obtaining flow rate of liquid v using ultrasonic transducer, the specific method is as follows：
And meet：k1+k2+…kN=2N
Wherein：v1For the flow velocity that the 1st pair of ultrasonic transducer obtains, k1The power of flow velocity is obtained for the 1st pair of ultrasonic transducer
Weight coefficient；v2For the flow velocity that the 2nd pair of ultrasonic transducer obtains, k2The weight system of flow velocity is obtained for the 2nd pair of ultrasonic transducer
Number；vNFor the flow velocity that N obtains ultrasonic transducer, kNThe weight coefficient of flow velocity is obtained to ultrasonic transducer for N.
In above-mentioned flow metering method, the method that the sectional area of liquid flowing is obtained using sonar is：
It obtains surveying liquid case operating mode image using sonar, it is built-in that mouth of a river operating mode plan view is crossed in surveying liquid case operating mode image
Vertical coordinate system obtains surveying the curvilinear equation that liquid case crosses bottom sludge surface in the operating mode plan view of the mouth of a river, according to the bottom sludge
The curvilinear equation on surface obtains the sectional area of liquid flowing.
In above-mentioned flow metering method, obtaining the sectional area that liquid flows using sonar, the specific method is as follows：
(1), it obtains surveying liquid case operating mode image using sonar, mouth of a river operating mode plan view is crossed in liquid case operating mode image if surveying
A vertex be coordinate origin, surveys liquid case width direction be x-axis, short transverse is y-axis, survey liquid case width be a, be highly b,
Flashboard Lift is h, obtains surveying liquid case and crosses the curvilinear equation y=f (x) on bottom sludge surface in the operating mode plan view of the mouth of a river, 0≤
x≤a；
(2), the sectional area A of liquid flowing is calculated according to the curvilinear equation on the bottom sludge surface：
In above-mentioned flow metering method, it is using the method that sonar obtains flow revisory coefficient：
It obtains surveying liquid case operating mode image using sonar, coordinate system is established in surveying liquid case operating mode image, obtain surveying liquid
The surface equation that liquid case bottom sludge surface is surveyed in case operating mode image, according to the curved surface side on the survey liquid case bottom sludge surface
Journey obtains flow revisory coefficient.
In above-mentioned flow metering method, obtaining flow revisory coefficient using sonar, the specific method is as follows：
(1), it obtains surveying liquid case operating mode image using sonar, if a vertex for surveying liquid case operating mode image is that coordinate is former
Point, survey liquid case width direction are x-axis, and short transverse is y-axis, and depth direction is z-axis, it is known that survey liquid case width is a, is highly b,
Depth is c, and the surface equation for obtaining surveying survey liquid case bottom sludge surface in liquid case operating mode image is
(2), flow revisory coefficient K is calculated according to the surface equation on the survey liquid case bottom sludge surface：
In above-mentioned flow metering method, the calculation formula of the fluid flow is as follows：
Q=K × A × v
Wherein：Q is fluid flow, and A is the sectional area of liquid flowing, and v is flow rate of liquid, and K is flow revisory coefficient.
Measurement and control integration gate system, including flow measurement device, gate frame, flashboard and sluice control system, wherein
Flow measurement device includes surveying liquid case, ultrasonic transducer and sonar, and wherein ultrasonic transducer and sonar setting is surveying liquid case
On, ultrasonic transducer is used to obtain the flow velocity of liquid, and sonar is used to obtain the sectional area of liquid flowing, according to the liquid
Flow velocity and the sectional area of liquid flowing obtain fluid flow；The gate frame is connect with liquid case is surveyed, and flashboard is arranged in gate frame
It in frame, can be moved along gate frame, for controlling the flow for surveying liquid in liquid case；The sluice control system is for controlling flashboard
Unlatching and closure.
In above-mentioned measurement and control integration gate system, the sonar is additionally operable to obtain flow revisory coefficient, according to the liquid
The flow velocity of body, the sectional area of liquid flowing and flow revisory coefficient obtain fluid flow.
In above-mentioned measurement and control integration gate system, the flow measurement device further includes controller, and the controller connects
The measurement data for receiving ultrasonic transducer input obtains the flow velocity of liquid, and the measurement image for receiving sonar input obtains liquid flowing
Sectional area and flow revisory coefficient, and according to the flow velocity of the liquid, liquid flow sectional area and flow revisory coefficient obtain
To fluid flow.
The present invention has the advantages that compared with prior art：
(1), the present invention provides a kind of novel flow measurement device, and the basis of water tank is surveyed in existing measurement and control integration gate
On, Optimization for Ultrasonic Wave transducer layout increases sonar to measure sectional area, and obtains flow revisory coefficient by sonar, to ultrasound
Wave transducer measurement result is modified, and compared with conventional method, significantly improves the precision of flow measurement, has important meaning
Justice；
(2), inventive flow metering device and method by using sonar to measure liquid flow section and obtains flow
Revisory coefficient significantly improves the precision of flow measurement, still can without installing greater number of ultrasonic transducer
Enough reach high measurement accuracy, not only reduce cost, but also reduce measurement complexity, increases product reliability；
(3), the present invention combines verification experimental verification by theoretical research measuring and calculating, gives the optimal installation side of ultrasonic transducer
Formula, installation number and installation site greatly reduce the installation number of ultrasonic transducer, overcome in the prior art to protect
Measurement accuracy is demonstrate,proved, needs that greater number of ultrasonic transducer is installed, leads to the interference between the quantity and each measurement point of measurement point
It greatly increases, it is necessary to therefrom screen and remove distracter, and increase measurement complexity, improve the defect of measurement cost, not only
Measurement cost is saved, and simplifies flow, is greatly improved work efficiency；
(4), the optimization design that inventive flow metering device passes through quantity, installation site to installing component etc. so that
Overall structure is simple, small, adaptable；
(5), inventive flow metering device and method is applicable not only to the flow measurement of water in open channel, and suitable for each
The flow measurement of kind liquid, has a wide range of applications field and wide application prospect；
(6), measurement and control integration gate system provided by the invention not only may be used using the flow measurement device of innovative design
To realize the accurate water distribution in irrigated area, scientific dispatch and information system management, and the working strength of watermaster can be mitigated, improve water distribution
Management level makes full use of Water Resources Irrigation, improves Irrigation Project Design benefit, plays an important roll for building Water Conservancy Information；
(7), a large amount of samples show using inventive flow metering device and method the measuring accuracy of fluid flow to be reached
To 99% or more, it is significantly higher than conventional metered dose device and method, there is higher novelty.
Description of the drawings
Fig. 1 is measurement and control integration gate system schematic diagram of the present invention；
1- water inlets；2- surveys liquid case；3- sonars；4- ultrasonic transducers；5- gate frames；6- flashboards
Fig. 2 is that the present invention surveys ultrasonic transducer horizontal plane position schematic diagram in liquid case；
Fig. 3 is ultrasonic transducer vertical plane scheme of installation of the present invention, and Fig. 3 a are that ultrasonic transducer is 3 pairs；Fig. 3 b
It it is 4 pairs for ultrasonic transducer；
Fig. 4 is ultrasonic wave time difference method fundamental diagram of the present invention；
Fig. 5 is sonar fundamental diagram of the present invention；
Fig. 6 is sonar processor block diagram of the present invention；
Fig. 7 is that sonar of the present invention receives oscillogram；
Fig. 8 is sonar detection model schematic of the present invention, and wherein Fig. 8 a are to survey liquid case operating mode image, and Fig. 8 b are to survey liquid case
Mouth of a river operating mode plan view is crossed in operating mode image；
Fig. 9 is the model schematic of sectional area and flow revisory coefficient that another method of the present invention calculates liquid flowing,
Wherein Fig. 9 a are to calculate flow revisory coefficient schematic diagram, and Fig. 9 b are the sectional area schematic diagram for calculating liquid flowing.
Specific implementation mode
The present invention is described in further detail in the following with reference to the drawings and specific embodiments：
As shown in Figure 1 is measurement and control integration gate system schematic diagram of the present invention, as seen from the figure measurement and control integration lock of the present invention
Door system includes flow measurement device, gate frame 5, flashboard 6 and sluice control system (not shown), wherein flow measurement
Device includes water inlet 1, surveys liquid case 2, sonar 3, ultrasonic transducer 4 and controller (not shown).Survey liquid case 2 is both ends
The body structure of opening, water inlet 1 are tapered inlet, are arranged in an open end (liquid feeding end) for surveying liquid case 2, can drain
Current stabilization keeps liquid flowing in case steady.It is cuboid or cube structure that liquid case 2 is surveyed in the embodiment of the present invention.Ultrasonic wave transducer
Device 4 and sonar 3 are installed on the internal face for surveying 2 side wall of liquid case, and ultrasonic transducer 4 obtains the stream of liquid with controller cooperation
Speed, sonar 3 obtains the sectional area and flow revisory coefficient of liquid flowing with controller cooperation, according to the flow velocity of liquid, liquid flow
Dynamic sectional area and flow revisory coefficient obtains fluid flow.Specially：Controller receives the measurement of ultrasonic transducer input
Data obtain the flow velocity of liquid, and the measurement data for receiving sonar input obtains the sectional area and flow revisory coefficient of liquid flowing,
And the sectional area and flow revisory coefficient flowed according to the flow velocity of liquid, liquid obtains fluid flow.
Gate frame 5 is arranged in another open end (water outlet) for surveying liquid case 2, outer with survey 2 water outlet side wall of liquid case
Wall surface connects, and flashboard 6 is arranged in gate frame 5, can be moved up and down along gate frame 5, and liquid in liquid case 2 is surveyed for controlling
Flow, sluice control system are used to control unlatching and the closure of flashboard 6, and the controller that inventive flow measures in device can also
It is arranged in sluice control system.In addition for surveying water tank, size can be customized according to channel size, according to Place Research knot
Fruit, for example, it can be set to the size of flashboard 6 is：Width minimum 400mm, maximum 2000mm；Height minimum 400mm, maximum
2000mm。
It is illustrated in figure 2 the present invention and surveys ultrasonic transducer horizontal plane position schematic diagram in liquid case, the present invention is in ultrasonic wave
Consider that optimal survey water section number (i.e. optimal numbers of transducers) and optimal section spacing are (i.e. optimal in the installation site of energy converter 4
Energy converter between the upper and lower away from), ultrasonic transducer 4 have best measurement radius, such as can for 150~400mm between, for survey
Measuring accurate each group energy converter measurement range should be overlapped as possible, but cannot be excessively close, and ultrasonic transducer is set as two groups by the present invention,
It is arranged close to survey the internal face of a side wall of one open end of liquid case in diagonal installation, i.e. one of which surveying in liquid case,
The internal face of another group of another side wall opposite with aforementioned lateral wall for being arranged close to survey another open end of liquid case；Wherein one
A ultrasonic transducer in group constitutes a pair of of ultrasonic transducer with a ultrasonic transducer in another group, is formed altogether
N is 3~6 to ultrasonic transducer, the preferably value of N.
The present invention combines verification experimental verification by theoretical research measuring and calculating, provides following each size and surveys liquid case installation ultrasonic wave transducer
Device quantity (surveying water tank width does not influence numbers of transducers), it is assumed that the height for surveying liquid case 2 is b：
For the present invention by taking 800mm × 800mm surveys liquid case 2 as an example, 3 pairs or 4 pairs of installation is optimal, and it is super to be illustrated in figure 3 the present invention
Acoustic wave transducer vertical plane scheme of installation, wherein Fig. 3 a are that ultrasonic transducer is 3 pairs；Fig. 3 b are that ultrasonic transducer is 4
It is right.As shown in Figure 3a, it is a to survey water tank width, is highly b, in every group of ultrasonic transducer between two neighboring energy converter center
Distance be L2, the 1st, 3 energy converter center is L1, this group of energy converter center and another side edge at a distance from sidewall edge
The distance of edge is 0.2a, a=800mm, L2=250mm, L1=150mm in the present embodiment.As shown in Figure 3b, surveying water tank width is
A is highly b, and the distance between two neighboring energy converter center is L4 in every group of ultrasonic transducer, in the 1st, 4 energy converter
The heart is L3 at a distance from sidewall edge, this group of energy converter center is 0.2a at a distance from another sidewall edge, a in the present embodiment
=800mm, L3=100mm, L4=200mm.By theoretical research measuring and calculating and verification experimental verification, select to survey liquid in the embodiment of the present invention
Diagonally 3 pairs of the installation of case 2 or so, totally 6 ultrasonic transducers, can measure and survey typical disconnected fluid level flow speed value in liquid case 2；Installation side
Just, enough installation gaps, each group energy converter are not interfered with each other when measuring between each group energy converter.The present embodiment is when mounted
0.2 times away from inlet is chosen respectively and surveys 2 inside casing depth of liquid case and 0.8 times of survey 2 inside casing depth location of liquid case, obtains energy converter phase
For surveying the plan-position of liquid case 2, plane where each pair of ultrasonic transducer is parallel with the bottom plate of liquid case 2 is surveyed, further according to flat
Face position can obtain the angle between two opposite ultrasonic transducers.
As shown in Fig. 2, the internal face for surveying another side wall (top plate) of liquid case 2 is equipped with 2 sonars 5, the present invention is real
Two sonars 5 are placed in the roof symmetric position for applying survey liquid case 2 of the example in size between 400~2000mm, and two sonars 5 are with side wall
Face center is that symmetric points are symmetrical arranged.Sonar 5 actively emits sound wave " irradiation " target, then receives what target in water reflected
Echo is illustrated in figure 5 sonar fundamental diagram of the present invention, and wherein label 10 is mud, and 13 be transmitted wave, and 14 be back wave,
15 be flow, and 8 be the mouth of a river, and 6 be flashboard, and 3 be two sonars being symmetrically installed.It is illustrated in figure 6 sonar processor of the present invention
Block diagram is illustrated in figure 7 sonar of the present invention and receives oscillogram.The active sonar that the present invention uses understands oneself and sound equipment signal occurs,
By the variation that signal contact object back reflection is returned, the data as the relative size and distance for calculating this object.This
Sonar 5 is added in invention in survey liquid case can precisely depict ambient conditions in survey liquid case, draw out environmental model, that is, survey liquid case
Operating mode image can accurately calculate sectional area and flow revisory coefficient by model image.
Below for surveying water tank, detailed description ultrasonic transducer obtains the specific method and sonar of flow rate of liquid
Obtain the specific method of the sectional area and flow revisory coefficient of liquid flowing.
One, flow rate of liquid is obtained using ultrasonic transducer
A standard cistern is established, installation corresponding specification surveys water tank 2 and mating corresponding flashboard, allocation test water source pour into
In cistern, after 2 bottom deposit of water tank to be measured has certain mud, flashboard 6 is opened to height h, it is high that wherein height h is more than mud
Degree.Below by taking 800 × 800mm specifications survey water tank as an example, the computational methods to flowing through flashboard mouth flow value are described further.
First with the average speed for calculating flow in survey water tank 2 mounted on the ultrasonic transducer 4 for surveying 2 both sides of water tank
Degree.
Each pair of ultrasonic transducer 4 calculates corresponding plane of cutting off the water supply using ultrasonic wave time difference method and corresponds to flow velocity.When ultrasonic wave
Poor method be exactly using sound wave in a fluid fair current, adverse current propagate same distance when existence time it is poor, and the difference in propagation time with
The flowing velocity of detected fluid has relationship, therefore the difference for measuring the time can obtain the flow velocity of fluid.Its basic principle is such as
Shown in Fig. 4, Fig. 4 is ultrasonic wave time difference method fundamental diagram of the present invention.A pair that ultrasonic transducer A, B represent gate left and right sides can
Emit or receive the ultrasonic transducer of ultrasonic pulse in turn, components of the flow velocity v on ultrasonic propagation direction is v1, calculating side
Formula such as Fig. 4.
If the velocity of sound in detected fluid is C, time when ultrasonic wave fair current from A to B is t1, time when adverse current from B to A
For t2, gate widths (survey water tank width) are a, and angle is θ (two i.e. opposite ultrasounds between opposite two ultrasonic transducers
Angle in line and Fig. 9 between wave transducer center between x-axis is θ), then have：
In general industry measurement, the spread speed of ultrasonic wave in a liquid is much larger than the flow velocity of liquid, i.e. C2>>ν2sin2
θ, therefore, the concurrent-countercurrent time difference, Δ t can be reduced to：
Therefore, the fundamental equation of time difference method ultrasound flow velocity can be written as：
If surveying the flow velocity that N calculates ultrasonic transducer 4 from top to bottom of water tank 2 is followed successively by v1、v2…vN, then can find out
Mean flow rate v：
And meet：k1+k2+…kN=2N
Wherein：v1For the flow velocity of the 1st pair of ultrasonic transducer measuring and calculating, k1The power of flow velocity is calculated for the 1st pair of ultrasonic transducer
Weight coefficient；v2For the flow velocity of the 2nd pair of ultrasonic transducer measuring and calculating, k2The weight system of flow velocity is calculated for the 2nd pair of ultrasonic transducer
Number；vNFor the flow velocity that N calculates ultrasonic transducer, kNThe weight coefficient of flow velocity is calculated to ultrasonic transducer for N.C is
The velocity of sound in detected fluid；A is the width for surveying liquid case；θ1Angle, θ for the 1st between of ultrasonic transducer2For the 2nd pair of ultrasonic wave
Angle, θ between energy converterNFor angles of the N between ultrasonic transducer；Δt1The liquid measured for the 1st pair of ultrasonic transducer
The concurrent-countercurrent time difference；Δt2For the concurrent-countercurrent time difference for the liquid that the 2nd pair of ultrasonic transducer measures；ΔtNIt is N to ultrasound
The concurrent-countercurrent time difference for the liquid that wave transducer measures.θ in the embodiment of the present invention1=θ2=...=θN。
In the embodiment of the present invention as N=3, the flow velocity calculated is followed successively by v1、v2、v3, then can find out mean flow rate v is：
Numbers of transducers is different, asks single speed method constant, the formula of average speed is different：
4 pairs of 8 energy converters
5 pairs of 10 energy converters
6 pairs of 12 energy converters
The calculating of flow rate of liquid is completed by controller in the step, the measurement number that controller is inputted according to ultrasonic transducer
It is calculated according to completion.
Two, the sectional area and flow revisory coefficient of liquid flowing are obtained using sonar
The formula of flow is calculated it is found that volume flow Q can be by sectional area A and mean flow rate v products according to velocity_area method
It obtains, i.e. Q=Av, theoretically, sectional area A can be obtained by gatage value and survey water tank width, as shown in figure 3, surveying water tank
H (is calculated) in width a, gate opening height value by opening value, then A=ah.Under actual condition, water tank bottom meeting is surveyed
There is siltation, calculated water section of crossing is caused not conformed to the actual conditions；Meanwhile average speed calculation formula listed above is not examined
Consider actual condition.The present invention can map out environment in water tank in detail using sonar, can be calculated by sonograms analysis
It is practical to cross water section A, and give outflow revisory coefficient K, detailed computational methods as follows according to actual environment：
It obtains surveying water tank operating mode image using sonar 3 to get being sonar detection mould of the present invention to environmental model, such as Fig. 8
Type schematic diagram, wherein Fig. 8 a are to survey liquid case operating mode image, and Fig. 8 b are to survey to cross mouth of a river operating mode plan view in liquid case operating mode image.
As shown in Figure 8 a, wherein flow is 9, flashboard 6, and it is 8 to cross the mouth of a river, bottom sludge 10, if surveying a vertex of liquid case in figure
(left front vertex) is coordinate origin, and survey liquid case width direction is x-axis, and short transverse is y-axis, and depth direction is z-axis, it is known that is surveyed
Water tank width is a, is highly b, depth c, and image data is inputted the softwares such as origin, matlab, directly fits survey water
The surface equation of bottom portion muck surface is Or it can also be according to image data
Go out to survey the surface equation of water tank bottom muck surface by least square fitting, such as equation form can be y=A1x3+
B1x2+C1x+A2z3+B2z2+C2z+D。
Flow revisory coefficient K is found out according to the practical ratio crossed water volume and survey water tank inside casing actual volume, it can be to curved surfaceIt carries out dual-integration and calculates sludge volume, to obtain outflow revisory coefficient K,
Specific formula for calculation is as follows：
Mouth of a river operating mode plan view is crossed in liquid case operating mode image to survey as shown in Figure 8 b, flashboard is 6 in figure, crosses water section and is
12, bottom sludge 11, if a vertex (lower-left angular vertex) for the plane is coordinate origin in figure, surveying water tank width direction is
X-axis, short transverse are y-axis, it is known that flashboard Lift is h, and it is a to survey width of frame in water tank, is highly b；Image data is defeated
Enter the softwares such as origin, excel, matlab, the curvilinear equation for directly fitting bottom sludge surface in the plan view is y=f
(x) (0≤x≤a), or bottom sludge surface in the plan view can also be gone out by least square fitting according to image data
Curvilinear equation, such as equation form can be y=Ax2+Bx+C。
By the way that hatched area, i.e. the sectional area A of liquid flowing can be found out to curvilinear equation integral：
Then, actual flow is：
Q=K × A × v.
Further, it is also possible to calculate the sectional area A of flow revisory coefficient K and liquid flowing by other methods, such as by sound
It receives in the survey liquid case operating mode image Input Software (C language or other programming languages obtain) for measuring and obtaining, liquid case operating mode will be surveyed
Image is divided into that a many regular figures find out volume or area is superimposed again, and required volume or area can be obtained.If Fig. 9 is this
Another method of invention calculates the model schematic of the sectional area and flow revisory coefficient of liquid flowing, and wherein Fig. 9 a are to calculate to flow
Revisory coefficient schematic diagram is measured, Fig. 9 b are the sectional area schematic diagram for calculating liquid flowing.As illustrated in fig. 9, the imaging of water tank operating mode will be surveyed
Liquid volume is divided into many small cuboids in figure, finds out each cuboid volume superposition, you can required liquid volume is found out,
It is compared again with survey water tank volume, and then finds out flow revisory coefficient K；As shown in figure 9b, it will survey in water tank operating mode image
It crosses discharge area in the operating mode plan view of the mouth of a river and is divided into many small rectangles, liquid can be found out by finding out each rectangular area superposition
The sectional area A of body flowing.
The calculating for the sectional area and flow revisory coefficient that liquid flows in the step is completed by controller, and controller is according to sound
Receive input measurement image complete calculate.
The present invention also provides a kind of flow metering methods, specifically comprise the following steps：
(1), the flow velocity v of liquid is obtained using ultrasonic transducer；
(2), the sectional area A of liquid flowing is obtained using sonar；
(3), flow revisory coefficient K is obtained using sonar；
(4), the sectional area A and flow revisory coefficient K flowed according to the flow velocity v of liquid, liquid obtains fluid flow, specifically
Calculation formula is：Q=K × A × v.
The present invention is on the basis of existing measurement and control integration gate surveys water tank, Optimization for Ultrasonic Wave transducer layout, increase sound
It receives sensor measurement sectional area, and obtains flow revisory coefficient, ultrasonic transducer measurement result is modified.
Embodiment 1
A standard cistern is established, installation corresponding specification surveys water tank 2 and mating corresponding flashboard 6, allocation test water source fall
Enter in cistern, after 2 bottom deposit of water tank to be measured has certain mud, opens flashboard 6 to height h, it is high that wherein height h is more than mud
Degree.Input water is measured with standard electromagnetic flowmeter, water tank metering outflow water is surveyed with 800 × 800mm specifications, with static pressure type water
The position meter metering pond depth of water.The survey water tank is equipped with two groups of ultrasonic transducers, is installed in diagonal surveying in liquid case, i.e., wherein one
Group is positioned close on the internal face for surveying a side wall of liquid case open end (0.2 times of inlet surveys 2 inside casing depth location of liquid case),
Internal face (0.8 times of survey liquid of inlet of another group of another the opposite side wall for being positioned close to survey another open end of liquid case
2 inside casing depth location of case).A ultrasonic transducer in one of which is constituted with a ultrasonic transducer in another group
A pair of of ultrasonic transducer forms 3 pairs of ultrasonic transducers altogether；Two sonars are also equipped with, is arranged and is surveying the top of liquid case
Internal face, and be symmetrical arranged using the internal face center as symmetric points.When pond liquid level is constant, water is flowed out in the unit interval
Equal to input water, it is 99.27% to measure flow mean accuracy, and examination data are as follows：
And the flow accuracy for using conventional method to measure under the same terms is only 90%.
The above, best specific implementation mode only of the invention, but scope of protection of the present invention is not limited thereto,
Any one skilled in the art in the technical scope disclosed by the present invention, the change or replacement that can be readily occurred in,
It should be covered by the protection scope of the present invention.
The content that description in the present invention is not described in detail belongs to the known technology of professional and technical personnel in the field.
Claims (29)
1. a kind of flow measurement device, it is characterised in that：Including surveying liquid case, ultrasonic transducer and sonar, wherein ultrasonic waves
On surveying liquid case, ultrasonic transducer is used to obtain the flow velocity of liquid for energy device and sonar setting, and sonar is flowed for obtaining liquid
Sectional area, the sectional area flowed according to the flow velocity of the liquid and liquid obtains fluid flow.
2. flow measurement device according to claim 1, it is characterised in that：The sonar is additionally operable to obtain flow revision system
Number, the sectional area and flow revisory coefficient flowed according to the flow velocity of liquid, liquid obtain fluid flow.
3. flow measurement device according to claim 1, it is characterised in that：Further include controller, the controller receives
The measurement data of ultrasonic transducer input obtains the flow velocity of liquid, and the measurement data for receiving sonar input obtains liquid flowing
Sectional area, and fluid flow is obtained according to the sectional area that the flow velocity of the liquid and liquid flow.
4. flow measurement device according to claim 2, it is characterised in that：Further include controller, the controller receives
The measurement data of ultrasonic transducer input obtains the flow velocity of liquid, and the measurement data for receiving sonar input obtains liquid flowing
Sectional area and flow revisory coefficient, and the sectional area and flow revisory coefficient that are flowed according to the flow velocity of the liquid, liquid obtain
Fluid flow.
5. the flow measurement device according to one of Claims 1 to 4, it is characterised in that：The ultrasonic transducer is two
Group, diagonally positioned in liquid case surveying, i.e., one of which is positioned close to survey the internal face of a side wall of liquid case open end, separately
The internal face of one group of another side wall opposite with the side wall for being positioned close to survey another open end of liquid case；One of which
A ultrasonic transducer constitute a pair of of ultrasonic transducer with another group of a ultrasonic transducer, form N altogether to super
Acoustic wave transducer, N are positive integer, N >=1.
6. flow measurement device according to claim 5, it is characterised in that：The value of the N is 3~6.
7. flow measurement device according to claim 6, it is characterised in that：If the height for surveying liquid case is b, ultrasonic wave transducer
The number of device meets following condition：
400mm≤b≤1000mm N=3, ultrasonic transducer are 6；
1000mm<B≤1400mm N=4, ultrasonic transducer are 8；
1400mm<B≤1600mm N=5, ultrasonic transducer are 10；
1600mm<B≤2000mm N=6, ultrasonic transducer are 12.
8. flow measurement device according to claim 5, it is characterised in that：Plane where each pair of ultrasonic transducer with
A side wall surface for not installing ultrasonic transducer for surveying liquid case is parallel.
9. the flow measurement device according to one of Claims 1 to 4, it is characterised in that：The sonar is two, and setting exists
The internal face of a side wall of liquid case is surveyed, and is symmetrical arranged as symmetric points using the side wall surface center.
10. flow measurement device according to claim 9, it is characterised in that：The side wall of the survey liquid case of the setting sonar
The side wall surface of face and the survey liquid case of setting ultrasonic transducer is different lateral face.
11. the flow measurement device according to one of Claims 1 to 4, it is characterised in that：Further include water inlet, it is described into
The mouth of a river is tapered inlet, is arranged in the liquid feeding end for surveying liquid case.
12. flow measurement device according to claim 3 or 4, it is characterised in that：The controller receives sonar input
The method of sectional area that measurement data obtains liquid flowing is：
The survey liquid case operating mode image obtained using sonar is crossed in the operating mode plan view of the mouth of a river in surveying liquid case operating mode image and is established
Coordinate system obtains surveying the curvilinear equation that liquid case crosses bottom sludge surface in the operating mode plan view of the mouth of a river, according to the bottom sludge table
The curvilinear equation in face obtains the sectional area of liquid flowing.
13. flow measurement device according to claim 12, it is characterised in that：The controller receives the survey of sonar input
Measuring the sectional area that data acquisition liquid flows, the specific method is as follows：
(1), it obtains surveying liquid case operating mode image using sonar, the one of mouth of a river operating mode plan view is crossed in liquid case operating mode image if surveying
A vertex is coordinate origin, and survey liquid case width direction is x-axis, and short transverse is y-axis, and survey liquid case width is a, is highly b, flashboard
Lift is h, obtains surveying liquid case and crosses the curvilinear equation y=f (x) on bottom sludge surface in the operating mode plan view of the mouth of a river, 0≤x≤
a；
(2), the sectional area A of liquid flowing is calculated according to the curvilinear equation on the bottom sludge surface：
14. flow measurement device according to claim 4, it is characterised in that：The controller receives the survey of sonar input
Measuring the method that data obtain flow revisory coefficient is：
The survey liquid case operating mode image obtained using sonar establishes coordinate system in surveying liquid case operating mode image, obtains surveying liquid case
The surface equation that liquid case bottom sludge surface is surveyed in operating mode image, according to the surface equation on the survey liquid case bottom sludge surface
Obtain flow revisory coefficient.
15. flow measurement device according to claim 14, it is characterised in that：The controller receives the survey of sonar input
Measuring data acquisition flow revisory coefficient, the specific method is as follows：
(1), it obtains surveying liquid case operating mode image using sonar, a vertex of liquid case is surveyed to sit if surveying in liquid case operating mode image
Origin is marked, survey liquid case width direction is x-axis, and short transverse is y-axis, and depth direction is z-axis, it is known that survey liquid case width is a, height
For b, depth c, the surface equation for obtaining surveying survey liquid case bottom sludge surface in liquid case operating mode image is0≤
X≤a, 0≤z≤c；
(2), flow revisory coefficient K is calculated according to the surface equation on the survey liquid case bottom sludge surface：
16. flow measurement device according to claim 3 or 4, it is characterised in that：The controller receives ultrasonic wave transducer
The measurement data of device input obtains flow rate of liquid v, and the specific method is as follows：
And meet：k1+k2+…kN=2N
Wherein：v1For the flow velocity that the 1st pair of ultrasonic transducer obtains, k1The weight system of flow velocity is obtained for the 1st pair of ultrasonic transducer
Number；v2For the flow velocity that the 2nd pair of ultrasonic transducer obtains, k2The weight coefficient of flow velocity is obtained for the 2nd pair of ultrasonic transducer；vN
For the flow velocity that N obtains ultrasonic transducer, kNThe weight coefficient of flow velocity is obtained to ultrasonic transducer for N.
17. flow measurement device according to claim 16, it is characterised in that：1st pair, the 2nd pair ... N is to ultrasonic wave
The flow velocity v that energy converter obtains1、v2…vNSpecific formula for calculation it is as follows：
Wherein:C is the velocity of sound in detected fluid；A is the width for surveying liquid case；θ1Angle, θ for the 1st between of ultrasonic transducer2
Angle, θ for the 2nd between of ultrasonic transducerNFor angles of the N between ultrasonic transducer；Δt1For the 1st pair of ultrasonic waves
The concurrent-countercurrent time difference for the liquid that energy device measures；Δt2For the concurrent-countercurrent time difference for the liquid that the 2nd pair of ultrasonic transducer measures；
ΔtNFor the concurrent-countercurrent time difference of the N liquid measured to ultrasonic transducer.
18. flow measurement device according to claim 4, it is characterised in that：Flow velocity, liquid of the controller according to liquid
The specific formula that the sectional area and flow revisory coefficient of body flowing calculate fluid flow is as follows：
Q=K × A × v
Wherein：Q is fluid flow, and A is the sectional area of liquid flowing, and v is flow rate of liquid, and K is flow revisory coefficient.
19. a kind of flow metering method, it is characterised in that：Including：
The flow velocity of liquid is obtained using ultrasonic transducer；
The sectional area of liquid flowing is obtained using sonar；
The sectional area flowed according to the flow velocity of the liquid and liquid obtains the flow of liquid.
20. flow metering method according to claim 19, it is characterised in that：Further include：
Flow revisory coefficient is obtained using sonar；
The sectional area and flow revisory coefficient flowed according to the flow velocity of the liquid, liquid obtains fluid flow.
21. the flow metering method according to claim 19 or 20, it is characterised in that：Liquid is obtained using ultrasonic transducer
The specific method is as follows by body flow velocity v：
And meet：k1+k2+…kN=2N
Wherein：v1For the flow velocity that the 1st pair of ultrasonic transducer obtains, k1The weight system of flow velocity is obtained for the 1st pair of ultrasonic transducer
Number；v2For the flow velocity that the 2nd pair of ultrasonic transducer obtains, k2The weight coefficient of flow velocity is obtained for the 2nd pair of ultrasonic transducer；vN
For the flow velocity that N obtains ultrasonic transducer, kNThe weight coefficient of flow velocity is obtained to ultrasonic transducer for N.
22. the flow metering method according to claim 19 or 20, it is characterised in that：Liquid flowing is obtained using sonar
The method of sectional area is：
It obtains surveying liquid case operating mode image using sonar, crosses to establish in the operating mode plan view of the mouth of a river in surveying liquid case operating mode image and sit
Mark system obtains surveying the curvilinear equation that liquid case crosses bottom sludge surface in the operating mode plan view of the mouth of a river, according to the bottom sludge surface
Curvilinear equation obtain liquid flowing sectional area.
23. flow metering method according to claim 22, it is characterised in that：The section of liquid flowing is obtained using sonar
It is long-pending that the specific method is as follows：
(1), it obtains surveying liquid case operating mode image using sonar, the one of mouth of a river operating mode plan view is crossed in liquid case operating mode image if surveying
A vertex is coordinate origin, and survey liquid case width direction is x-axis, and short transverse is y-axis, and survey liquid case width is a, is highly b, flashboard
Lift is h, obtains surveying liquid case and crosses the curvilinear equation y=f (x) on bottom sludge surface in the operating mode plan view of the mouth of a river, 0≤x≤
a；
(2), the sectional area A of liquid flowing is calculated according to the curvilinear equation on the bottom sludge surface：
24. flow metering method according to claim 20, it is characterised in that：Flow revisory coefficient is obtained using sonar
Method is：
It obtains surveying liquid case operating mode image using sonar, coordinate system is established in surveying liquid case operating mode image, obtain surveying liquid case work
The surface equation that liquid case bottom sludge surface is surveyed in condition image is obtained according to the surface equation on the survey liquid case bottom sludge surface
To flow revisory coefficient.
25. flow metering method according to claim 24, it is characterised in that：Flow revisory coefficient is obtained using sonar
The specific method is as follows：
(1), it obtains surveying liquid case operating mode image using sonar, if a vertex for surveying liquid case operating mode image is coordinate origin,
Survey liquid case width direction is x-axis, and short transverse is y-axis, and depth direction is z-axis, it is known that survey liquid case width is a, is highly b, deep
Degree is c, and the surface equation for obtaining surveying survey liquid case bottom sludge surface in liquid case operating mode image is0≤x≤a, 0
≤z≤c；
(2), flow revisory coefficient K is calculated according to the surface equation on the survey liquid case bottom sludge surface：
26. according to the flow metering method described in claim 20,24 or 25, it is characterised in that：The calculating of the fluid flow
Formula is as follows：
Q=K × A × v
Wherein：Q is fluid flow, and A is the sectional area of liquid flowing, and v is flow rate of liquid, and K is flow revisory coefficient.
27. measurement and control integration gate system, it is characterised in that：It is controlled including flow measurement device, gate frame, flashboard and gate
System, wherein flow measurement device include surveying liquid case, ultrasonic transducer and sonar, wherein ultrasonic transducer and sonar setting
On surveying liquid case, ultrasonic transducer is used to obtain the flow velocity of liquid, and sonar is used to obtain the sectional area of liquid flowing, according to institute
The sectional area of the flow velocity and liquid flowing of stating liquid obtains fluid flow；The gate frame is connect with liquid case is surveyed, flashboard setting
It in gate frame, can be moved along gate frame, for controlling the flow for surveying liquid in liquid case；The sluice control system is used for
Control unlatching and the closure of flashboard.
28. measurement and control integration gate system according to claim 27, it is characterised in that：The sonar is additionally operable to be flowed
Revisory coefficient is measured, the sectional area and flow revisory coefficient flowed according to the flow velocity of the liquid, liquid obtains fluid flow.
29. measurement and control integration gate system according to claim 28, it is characterised in that：The flow measurement device also wraps
Controller is included, the controller receives the flow velocity of the measurement data acquisition liquid of ultrasonic transducer input, receives sonar input
Measure image obtain liquid flowing sectional area and flow revisory coefficient, and according to the flow velocity of the liquid, liquid flow
Sectional area and flow revisory coefficient obtain fluid flow.
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