CN110057413A - Flow measurement device and its method based on dynamic grid - Google Patents
Flow measurement device and its method based on dynamic grid Download PDFInfo
- Publication number
- CN110057413A CN110057413A CN201910107685.2A CN201910107685A CN110057413A CN 110057413 A CN110057413 A CN 110057413A CN 201910107685 A CN201910107685 A CN 201910107685A CN 110057413 A CN110057413 A CN 110057413A
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- ultrasonic transducer
- grid
- flow
- open channel
- automatically lifting
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Classifications
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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
- G01F1/002—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow wherein the flow is in an open channel
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/30—Assessment of water resources
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Measuring Volume Flow (AREA)
Abstract
The present invention relates to middle-size and small-size open channel flow rate fields of measurement, it is flow measurement device and its method based on dynamic grid, solves the problems, such as big without flow velocity method measurement error in the prior art.The present invention includes being respectively arranged at the ultrasonic transducer group of open channel two sides to be measured, microcontroller, water level monitoring device, apparatus for automatically lifting；Ultrasonic transducer is provided on the apparatus for automatically lifting；The ultrasonic transducer group, water-level detecting device and apparatus for automatically lifting are separately connected microcontroller.A kind of flow measurement device and its method based on dynamic grid disclosed by the invention is based on the flow-measuring method of dynamic grid by region division grid to be measured, dynamic adjusts the size and quantity of grid, pass through algorithm for reconstructing, the mean flow rate for rebuilding the flow velocity in each grid improves the precision of flow relocity calculation；It is called and is calculated by more ultrasonic transducer routes to the apparent region of change rate or grid, further increase the raising of flow velocity precision.
Description
Technical field
The present invention relates to middle-size and small-size open channel flow rate fields of measurement, particularly relate to flow measurement device based on dynamic grid with
Method.
Background technique
Open channel flow rate measuring system be suitable for reservoir, river, hydraulic engineering, urban water supply, sewage treatment, field irrigation,
The flow measurement of the rectangles such as water administration water resource, trapezoidal open channel and culvert.
Existing open channel flow rate measurement method has radar wave flowmeter, ultrasonic open channel flowmeter, acoustic doppler open channel
Measuring instrument equivalent amount of water technology mostly using a flow velocity method, the flow velocity of level is represented with a point or several points, according to each
The speed of level calculates the substantially flow velocity of water flow, therefore precision is very low, develop it is a kind of it is at low cost, precision is high, easy to operate, knot
The simple open-channel meter of structure has practical significance rational utilization of water resources, waste water control.
The fluidised form of open channel is very complicated, there is torrent, unhurried current, turbulent flow etc., and the different location of the same level its fluidised form
Difference, existing method is mostly using flow velocity method or level mean flow rate method, i.e., with the flow velocity of limited measurement point
Characterize the mean flow rate of entire level, very not precisely.
Summary of the invention
The present invention proposes flow measurement device and method based on dynamic grid, solves in the prior art without a flow velocity method
The big problem of measurement error.
The technical scheme of the present invention is realized as follows: the flow measurement device based on dynamic grid, including ultrasonic transduction
Device group, the ultrasonic transducer group are respectively arranged at open channel two sides to be measured, and ultrasonic transducer group is uniformly distributed in open channel depth side
To further including the microcontroller for control and operation, water level monitoring device, apparatus for automatically lifting；The apparatus for automatically lifting
On be provided with ultrasonic transducer；The apparatus for automatically lifting is set to open channel two sides ultrasonic transducer group vertical direction, with open channel
The water surface is parallel；The ultrasonic transducer group, water-level detecting device and apparatus for automatically lifting are separately connected microcontroller.
Further, the open channel bottom is additionally provided with ultrasonic transducer, the ultrasonic transducer and is set to automatic liter
Ultrasonic transducer on falling unit is arranged in parallel.
Further, described to be set to apparatus for automatically lifting and the ultrasonic transducer of open channel bottom is no less than two.
It further, further include communication device and remote control apparatus, the communication device connection microcontroller and long-range
Control device.
Flow-measuring method disclosed by the invention based on dynamic grid, comprising the following steps: ultrasonic transducer is arranged in A:
Ultrasonic transducer group is respectively set in open channel two sides to be measured；Apparatus for automatically lifting is set in open channel, is set on apparatus for automatically lifting
Set ultrasonic transducer；Water-level detecting device is set；B adjusts apparatus for automatically lifting position: water level is monitored by water level monitoring device,
Apparatus for automatically lifting is controlled by microcontroller, submerges the ultrasonic transducer on apparatus for automatically lifting in water；Dynamic Networks are arranged in C
Lattice: according to the ultrasonic transducer submerged in water, pass through microcontroller dynamic call flow field grid；D flow field is rebuild: by micro-
Controller operation generates flow field；The transmitting of E signal: remote control apparatus is transmitted signals to by communication device.
Further, the step A further includes being parallel to apparatus for automatically lifting direction setting ultrasonic transduction in open channel bottom
Device.
Further, the step D particularly judges flow field change rate, and ultrasonic transducer is called to become change rate
Change apparent region, dynamic changes sizing grid and quantity and ultrasonic transducer route calls, and realizes flow field by algorithm
It rebuilds.
Further, further include step F real-time monitoring: repeating step C, D and E, real-time traffic field is passed through into communication device
It is sent to remote control apparatus；After the step F is set to step E.
A kind of flow of flow measurement device and its method based on dynamic grid based on dynamic grid disclosed by the invention
For measurement method by region division grid to be measured, the size and quantity that dynamic adjusts grid rebuild each net by algorithm for reconstructing
The mean flow rate of flow velocity in lattice improves the precision of flow relocity calculation；By to the mostly super of the apparent region of change rate or grid
Sonic transducer route is called and is calculated, and further increases the raising of flow velocity precision.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention without any creative labor, may be used also for those of ordinary skill in the art
To obtain other drawings based on these drawings.
Fig. 1: ultrasonic transducer layout drawing；
Fig. 2: sound-wave path and grid dividing figure；
Fig. 3: sound-wave path and grid dividing figure after dynamic change.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
As shown in Fig. 1 ultrasonic transducer layout drawing, a kind of flow measurement device based on dynamic grid disclosed by the invention,
Including ultrasonic transducer group, the ultrasonic transducer group is respectively arranged at open channel two sides to be measured, and ultrasonic transducer group is uniformly distributed
It further include the microcontroller for control and operation, water level monitoring device, apparatus for automatically lifting in open channel depth direction；It is described
Ultrasonic transducer is provided on apparatus for automatically lifting；It is vertical that the apparatus for automatically lifting is set to open channel two sides ultrasonic transducer group
Direction, it is parallel with the open channel water surface；The ultrasonic transducer group, water-level detecting device and apparatus for automatically lifting are separately connected microcontroller
Device.Wherein stain indicates that ultrasonic transducer, ultrasonic transducer 11,12,13 are placed on above apparatus for automatically lifting, changes ultrasonic wave
Energy converter 11,12,13 position is determined to dynamically change the size and quantity of reconstruction regions and grid by measurement water level
Using which energy converter, optimal path is adaptively used, achievees the purpose that quickly to rebuild.
Further, the open channel bottom is additionally provided with ultrasonic transducer, the ultrasonic transducer and is set to automatic liter
Ultrasonic transducer on falling unit is arranged in parallel.
Further, described to be set to apparatus for automatically lifting and the ultrasonic transducer of open channel bottom is no less than two.
It further, further include communication device and remote control apparatus, the communication device connection microcontroller and long-range
Control device.
Flow-measuring method disclosed by the invention based on dynamic grid, comprising the following steps: ultrasonic transducer is arranged in A:
Ultrasonic transducer group is respectively set in open channel two sides to be measured；Apparatus for automatically lifting is set in open channel, is set on apparatus for automatically lifting
Set ultrasonic transducer；Water-level detecting device is set；B adjusts apparatus for automatically lifting position: water level is monitored by water level monitoring device,
Apparatus for automatically lifting is controlled by microcontroller, submerges the ultrasonic transducer on apparatus for automatically lifting in water；Dynamic Networks are arranged in C
Lattice: according to the ultrasonic transducer submerged in water, pass through microcontroller dynamic call flow field grid；D flow field is rebuild: by micro-
Controller operation generates flow field；The transmitting of E signal: remote control apparatus is transmitted signals to by communication device.
Further, the step A further includes being parallel to apparatus for automatically lifting direction setting ultrasonic transduction in open channel bottom
Device.
Further, the step D particularly judges flow field change rate, and ultrasonic transducer is called to become change rate
Change apparent region, dynamic changes sizing grid and quantity and ultrasonic transducer route calls, and realizes flow field by algorithm
It rebuilds.
Further, further include step F real-time monitoring: repeating step C, D and E, real-time traffic field is passed through into communication device
It is sent to remote control apparatus；After the step F is set to step E.
It is multiple small grids, the net of 6x6 by region division to be measured as shown in sound-wave path figure Fig. 2 of the invention
Lattice, i.e. dynamic grid.As shown in sound-wave path after Fig. 3 dynamic change and grid dividing figure, when water level changes, surpass
The path of sound wave and the grid number of reconstruction regions also dynamically change, which may be implemented multicellular flow velocity and surveyed
Amount, can accurately measure real-time traffic.
In use, when water level did not had 1 and No. 6 ultrasonic transducer, all ultrasonic waves are devoted oneself to work, and are rebuild complete
Portion region；When water level is among 1 and 2 energy converters, 1 stops using with 6, and reconstruction regions become the region of 2,5,10,7 compositions；Water
Successively decline reconstruction regions are also successively reduced with number of grid for position；Similarly, mud gets higher 5 and stops using with 10, reconstruction regions
It is reduced into the region of 1,4,9,6 compositions accordingly.By water-level detecting device, rebuilding plane is adjusted in real time and is reached with ultrasonic wave path
Two-dimentional velocity field is restored to accurate.
The principle of ultrasonic two dimension measurement of discharge is as follows:
If sound wave launch point A to receiving point B distance is that (unit m) then flies over time Δ t (singly in static underwater acoustic wave to L
Position is
cABThe bulk sound velocity (unit m/s) for being sound wave on the AB of path.If there is the velocity component v of the direction of propagationABIt deposits
Then having
Wherein vABFor along the fluid velocity component of path AB, unit m/s.
When sound wave transmitting/receiving point is exchanged, (unit s) is for flying over the time from B point to A point
Wherein vABFor along the fluid velocity component of path AB, unit m/s.
If twice of flying over subtracted each other:
More than small 3 orders of magnitude of measurement object ratio c, therefore in denominatorIt can be omitted.
If it is θ that sound wave, which flies degree path and the angle of water (flow) direction, then there is w=v/cos θ, wherein w is the speed of water flow
Use LkiIndicate that kth paths pass through the length of i-th of grid, wiIndicate the average speed of sound wave in the stereoscopic grid
Degree, then sound wave spends the time difference along the winged of kth paths
Least square method is to enable the quadratic sum of equation for minimum
ATAW=AT·t
Wherein W=(w1,...,wn)T, t=(Δ t1,...,Δtm)T,
Wherein,
Wherein θkiFor the angle of kth paths and water (flow) direction in i-th of grid, c is acoustic speed.
wnFor i-th of flow velocity, dl is the differential of sound-wave path.
W=(AT·A)-1·AT·t
Water level height is obtained by surveying water level device, and the size of two-dimentional velocity field, real-time reconstruction two dimension are rebuild in adjustment in real time
Flow velocity field data, final flow rate are
Wherein, wiIndicate mean flow rate in i-th of grid, SiIndicate that the area of i-th of grid, n indicate the grid divided
Number.
A kind of flow of flow measurement device and its method based on dynamic grid based on dynamic grid disclosed by the invention
For measurement method by region division grid to be measured, the size and quantity that dynamic adjusts grid rebuild each net by algorithm for reconstructing
The mean flow rate of flow velocity in lattice improves the precision of flow relocity calculation；By to the mostly super of the apparent region of change rate or grid
Sonic transducer route is called and is calculated, and further increases the raising of flow velocity precision.
Certainly, without deviating from the spirit and substance of the present invention, those skilled in the art should can be with
Various corresponding changes and modifications are made according to the present invention, but these corresponding changes and modifications all should belong to appended by the present invention
Scope of protection of the claims.
Claims (8)
1. the flow measurement device based on dynamic grid, including ultrasonic transducer group, the ultrasonic transducer group is respectively arranged at
Open channel two sides to be measured, ultrasonic transducer group are uniformly distributed in open channel depth direction, it is characterised in that: further include for controlling and transporting
Microcontroller, water level monitoring device, the apparatus for automatically lifting of calculation；
Ultrasonic transducer is provided on the apparatus for automatically lifting；The apparatus for automatically lifting is set to open channel two sides ultrasonic transduction
Device group vertical direction, it is parallel with the open channel water surface；
The ultrasonic transducer group, water-level detecting device and apparatus for automatically lifting are separately connected microcontroller.
2. the flow measurement device according to claim 1 based on dynamic grid, it is characterised in that: the open channel bottom is also
It is provided with ultrasonic transducer, the ultrasonic transducer is arranged in parallel with the ultrasonic transducer being set on apparatus for automatically lifting.
3. the flow measurement device according to claim 2 based on dynamic grid, it is characterised in that: described to be set to automatically
Lifting device and the ultrasonic transducer of open channel bottom are no less than two.
4. based on the flow measurement device of dynamic grid described according to claim 1-any one of 3, it is characterised in that:
It further include communication device and remote control apparatus, the communication device connects microcontroller and remote control apparatus.
5. the flow-measuring method based on dynamic grid, it is characterised in that: the following steps are included:
Ultrasonic transducer is arranged in A: ultrasonic transducer group is respectively set in open channel two sides to be measured；Automatic lifting is arranged in open channel to fill
It sets, ultrasonic transducer is set on apparatus for automatically lifting；
Water-level detecting device is set；
B adjusts apparatus for automatically lifting position: monitoring water level by water level monitoring device, controls automatic lifting dress by microcontroller
It sets, submerges the ultrasonic transducer on apparatus for automatically lifting in water；
Dynamic grid is arranged in C: according to the ultrasonic transducer submerged in water, passing through microcontroller dynamic call flow field grid；
D flow field is rebuild: generating flow field by microcontroller operation；
The transmitting of E signal: remote control apparatus is transmitted signals to by communication device.
6. the flow-measuring method according to claim 5 based on dynamic grid, it is characterised in that: the step A is also wrapped
It includes in open channel bottom, is parallel to apparatus for automatically lifting direction setting ultrasonic transducer.
7. the flow-measuring method according to claim 6 based on dynamic grid, it is characterised in that: the step D is specific
Be to judge flow field change rate, and ultrasonic transducer is called to change apparent region to change rate, dynamic changes sizing grid
It is called with quantity and ultrasonic transducer route, the reconstruction of flow field is realized by algorithm.
8. the flow-measuring method according to claim 6 based on dynamic grid, it is characterised in that: further include step F real
When monitor: repeat step C, D and E, real-time traffic field is sent to remote control apparatus by communication device；
After the step F is set to step E.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910107685.2A CN110057413B (en) | 2019-02-02 | 2019-02-02 | Flow measuring device and method based on dynamic grid |
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| CN201910107685.2A CN110057413B (en) | 2019-02-02 | 2019-02-02 | Flow measuring device and method based on dynamic grid |
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| CN110057413A true CN110057413A (en) | 2019-07-26 |
| CN110057413B CN110057413B (en) | 2023-06-20 |
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Cited By (2)
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|---|---|---|---|---|
| CN111089627A (en) * | 2019-12-23 | 2020-05-01 | 太原理工大学 | Multi-resolution open channel automatic flow measuring device based on area flow velocity method |
| CN111881599A (en) * | 2020-06-24 | 2020-11-03 | 江苏大学 | Flow measurement device and method based on finite element method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111089627A (en) * | 2019-12-23 | 2020-05-01 | 太原理工大学 | Multi-resolution open channel automatic flow measuring device based on area flow velocity method |
| CN111881599A (en) * | 2020-06-24 | 2020-11-03 | 江苏大学 | Flow measurement device and method based on finite element method |
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| CN110057413B (en) | 2023-06-20 |
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