CN106895889A - The measuring method of pipe network flow - Google Patents
The measuring method of pipe network flow Download PDFInfo
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- CN106895889A CN106895889A CN201710263940.3A CN201710263940A CN106895889A CN 106895889 A CN106895889 A CN 106895889A CN 201710263940 A CN201710263940 A CN 201710263940A CN 106895889 A CN106895889 A CN 106895889A
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- receiver
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- pipe network
- ultrasonic wave
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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
- G01F1/663—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 by measuring Doppler frequency shift
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
Abstract
The measuring method of pipe network flow of the invention, it places the first receiver, transmitter and the second receiver in the bottom of pipe network, first receiver, transmitter and the second receiver are placed along pipe network water flow velocity direction, and the first receiver and the second receiver are individually positioned in the symmetric position of transmitter, the direction of the launch of transmitter is vertical with water (flow) direction, and the method is comprised the following steps：Pipe network cross section is divided evenly into N parts in the direction of the launch along transmitter, and calculates every part of area；Allow transmitter in a transmit direction tranmitting frequency be f0Ultrasonic wave, while the second receiver and the first receiver receive reflection frequency f of the ultrasonic wave launched by transmitter in water1And f2The angle of the direction of the launch and reflection direction residing for the reflection frequency is received simultaneously, the flow velocity of the water is multiplied by the water flow velocity every part of area in step, obtain the water-carrying capacity on every part of area, water-carrying capacity on every a area is added, that is, has obtained the water-carrying capacity on the pipe network cross section vertical with transmitter.
Description
Technical field
The present invention relates to a kind of measuring method of flow, particularly a kind of measuring method of pipe network flow.
Background technology
Pipe network flow monitoring is the important component of sponge city on-line monitoring system, high-precision real-time traffic measurement
Data, are that runoff coefficient examination, flood forecasting and scheduling etc. provide important data foundation.
At present, the present situation to the monitoring method of pipe network flow is：
1）At present, flow is commonly used in pipe network and is calculated as spot measurement of flow amount, and the shape in drainage pipeline measurement section is fixed, when water level hair
During changing, the position of measurement point is constant, then often there is problem during the flow for calculating.Different measuring environment and under the conditions of,
Measurement is often inaccurate.
2）Every kind of flowmeter has the applicability of oneself.The flow commonly used in pipe network is calculated as single-point flow, and most of is seat
Bottom formula flowmeter cannot be otherwise measured, it is necessary to be applied to certain depth of water.But in actual drainpipe, the height on-fixed of water level
, therefore in actual applications, limited by environment.
3）Drainage pipeline networks realizes the less of on-line monitoring, does not have too many experience.Existing monitoring effect is also undesirable, reason
On the one hand lectotype selection, the adaptability at scene and equipment setting be can be summarized as and there is problem, the coffret of another aspect data
Traditional Serial Port Transmission mode is still used, and current main-stream transmission means is network transmission, in the epoch based on network monitoring, is passed
System interface is gradually eliminated, and is not easy to be integrated.
The content of the invention
Present invention purpose is to solve the problems, such as above-mentioned pipe network flow, and provides a kind of measurement of pipe network flow
Method.
In order to complete present invention purpose, the application uses following technical scheme：
A kind of measuring method of pipe network flow of the invention, it places the first receiver, transmitter and second in the bottom of pipe network
Receiver, the first receiver, transmitter and the second receiver are placed along pipe network water flow velocity direction, and the first receiver and the
Two receivers are individually positioned in the symmetric position of transmitter, and the direction of the launch of transmitter is vertical with water (flow) direction, wherein：The party
Method is comprised the following steps：
（1）Pipe network cross section is divided evenly into N parts in the direction of the launch along transmitter, and calculates every part of face
Product,
（2）Allow transmitter in a transmit direction tranmitting frequency be f0Ultrasonic wave, while the second receiver and the first receiver connect
Receive the reflection frequency f in water by the ultrasonic wave of transmitter transmitting1And f2, while receiving the direction of the launch residing for the reflection frequency
With the angle of reflection direction,
（3）According to formula, the flow velocity of water is obtained, it is every in step that the flow velocity of the water is multiplied by into the water flow velocity
Part area, obtains the water-carrying capacity on every part of area, and the water-carrying capacity on every a area is added, that is, obtained vertical with transmitter
Pipe network cross section on water-carrying capacity, wherein c be speed of the ultrasonic wave in water, it is related to water temperature, water temperature for 20 DEG C when,
C=1492m/s, when water temperature is constant, c is identical.
The measuring method of pipe network flow of the invention, wherein：In step（2）In, super along what is launched by transmitter 2
On sound wave direction, the distance that ultrasonic wave is walked on pipe network cross section is L, and L is divided into N parts, and the ultrasonic wave is from transmitting
Device 2 was respectively to the time required for being divided into N Fen Meifen centers, first
The receiver 3 of receiver 1 and second receives the time returned from every part of foveal reflex for being divided into N parts and is respectively , i.e. the first receiver 1 and the second receiver 3 are received and sent out from transmitter 2
Penetrate ultrasonic wave to count, time interval is Received f1And f2And the angle α of the corresponding direction of the launch and reflection direction.
The measuring method of pipe network flow of the invention, wherein：It also includes：Controller, the controller connects with first respectively
Device, transmitter and the second receiver is received to be connected；
The measuring method of pipe network flow of the invention, wherein：The N is the natural number more than 3；
The measuring method of pipe network flow of the invention, wherein：The underwater speed of ultrasonic wave is related to water temperature, is in water temperature
At 20 DEG C, C=1492m/s.
The method is tested the speed based on ultrasonic Doppler technique, by the modulation to transmission signal, receives the demodulation of signal, real
The measurement of existing vertical flow velocity.By the measurement of vertical flow velocity multilayer water flow velocity, can the accurate vertical flow of reference section.With section
Vertical flow velocity replaces traditional single-point flow velocity, improves measurement flow accuracy.Meanwhile, measurement water level information in real time will be obtained, in real time
Vertical measurement distance is adjusted, with the flow measurement being applicable under different water levels.In real-time monitoring, pipe network flowmeter uses Ethernet
As the mode of data transfer, networking synchro measure can be carried out, and in the on-line monitoring system of sponge city, as intelligent whole
End, for real-time monitoring provides authentic data.
Brief description of the drawings
Fig. 1 is one section in the measuring method for pipe network flow of the present invention and illustrates with river direction identical river section
Figure；
Fig. 2 is to flow to vertical longitudinal profile schematic diagram with river at A-A in Fig. 1.
In Fig. 1, label 1 is the first receiver；Label 2 is transmitter；Label 3 is the second receiver；Label 4 is transmitting
Direction；Label 5 is reflection direction；Label 6 is controller.
Specific embodiment
It is symmetrically relation as shown in figure 1, the first receiver 1 and the second receiver 3 are at the two ends of transmitter 2.Measurement
The two-dimentional flow velocity of each water layer, i.e. x, y directions flow velocity.First, the transmitting terminal transmitting fixed frequency and regular length of transmitter 2
Pulse signal, the pulse signal runs into the reflective particle of the motion in water on different water layers, then the pulse signal is reflected
Or scattering, received by the first receiver 1 and the second receiver 3 respectively.Motion is run into the pulse signal that certain frequency is launched
After reflective particle, the pulse signal frequency of its reflection or scattering will change.First receiver 1 and the second receiver 3 are captured
To after the pulse signal of reflection or scattering, by auto-correlation algorithm, the change of the frequency is extracted, according to formula 1）, you can obtain
Frequency displacement,.The formula is in paper " Flow and turbulence in sharp open-channel bends " the 49th
Disclosed in page, author is Koen BLANCKAERT.According to velocity formula 1), x and y directions two dimension flow velocity is calculated respectively,,
Such as formula 2）.
1)
2)
Wherein C is ultrasonic underwater speed（Coolant-temperature gage is 20 DEG C, C=1492m/s）, α is the direction of the launch 4 and reflection direction 5
Angle, f0Launch the frequency of ultrasonic wave in the direction of the launch 4 for transmitter 2.
Calculate fluid flow, it is assumed that fluid is dS, in the 1/N being such as divided into one by a certain small area in section
Part, and v i.e. above-mentioned formula 1 will be taken as by the flow velocity of the small area fluid）VxWhen, then fluid is by small area dS's
Volume flow dQ is：
A kind of measuring method of pipe network flow of the invention, the method uses following device：First receiver 1, transmitter 2 and
Two receivers 3 and controller 6, the controller 6 are connected with the first receiver 1, the receiver 3 of transmitter 2 and second respectively, in pipe network
Bottom place the first receiver 1, the receiver 3 of transmitter 2 and second, the first receiver 1, the edge of 2 and second receiver of transmitter 3
The placement of pipe network water flow velocity direction, and the first receiver 1 and the second receiver 3 are individually positioned in the symmetric position of transmitter 2
On, the direction of the launch 4 of transmitter 2 is vertical with water (flow) direction, and the method is comprised the following steps：
（1）Pipe network cross section is divided evenly into N parts in the direction of the launch 4 along transmitter 2, and calculates every part of face
Product, wherein N is the natural number more than 3；
（2）On along the ultrasonic wave direction launched by transmitter 2, the distance that ultrasonic wave is walked on pipe network cross section is
L, L are divided into N parts, and the ultrasonic wave is respectively from transmitter 2 to the time required for being divided into N Fen Meifen centers , the first receiver 1 and the second receiver 3 are received from being divided into N parts every
The time that part foveal reflex is returned is respectively, i.e.,
One receiver 1 and the second receiver 3 are received to be counted from the transmitting ultrasonic wave of transmitter 2, and time interval is Reflection frequency f1And f2And it is corresponding
The angle α of the direction of the launch 4 and reflection direction 5.
（3）According to the reflection frequency f that the receiver 3 of above-mentioned first receiver 1 and second is received1And f2And corresponding hair
The angle α in direction 4 and reflection direction 5 is penetrated, formula is used, obtain being divided into the flow velocity at N Fen Meifen centers, will
The flow velocity of the water is multiplied by the water flow velocity in step（1）In corresponding every part of area, obtain the water-carrying capacity on every part of area, will be each
Water-carrying capacity on part area is added, that is, obtained the water-carrying capacity on the pipe network cross section vertical with transmitter 2, and wherein c is described
The underwater speed of ultrasonic wave, it is related to water temperature, and when water temperature is 20 DEG C, C=1492m/s, operator can in advance measure water
Temperature, finds the underwater speed of ultrasonic wave.
Above description is explanation of the invention, is not the restriction to inventing, and limited range of the present invention is referring to right
It is required that, in the case of without prejudice to spirit of the invention, the present invention can make any type of modification.
Claims (5)
1. a kind of measuring method of pipe network flow, it places the first receiver 1, transmitter 2 and second and receives in the bottom of pipe network
Device 3, the first receiver 1, the receiver 3 of transmitter 2 and second are placed along pipe network water flow velocity direction, and the He of the first receiver 1
Second receiver 3 is individually positioned in the symmetric position of transmitter 2, and the direction of the launch 4 of transmitter 2 is vertical with water (flow) direction, its
It is characterised by：The method is comprised the following steps：
1）Pipe network cross section is divided evenly into N parts in the direction of the launch 4 along transmitter 2, and calculates every part of face
Product,
2）It is f to allow the tranmitting frequency in the direction of the launch 4 of transmitter 20Ultrasonic wave, the second receiver 3 and the first receiver 1 are received
Reflection frequency f of the ultrasonic wave launched by transmitter 2 in water1And f2, while receiving the direction of the launch 4 residing for the reflection frequency
With the angle α of reflection direction 5,
3）According to formula, the flow velocity of water is obtained, the flow velocity of the water is multiplied by the water flow velocity in step 1）In it is every
Part area, obtains the water-carrying capacity on every part of area, and the water-carrying capacity on every a area is added, that is, obtained being hung down with transmitter 2
Water-carrying capacity on straight pipe network cross section, wherein c is the underwater speed of ultrasonic wave.
2. the measuring method of pipe network flow as claimed in claim 1, it is characterised in that：In step 2）In, along by
On the ultrasonic wave direction that transmitter 2 is launched, the distance that ultrasonic wave is walked on pipe network cross section is L, and L is divided
Into N parts, the ultrasonic wave is respectively from transmitter 2 to the time required for being divided into N Fen Meifen centers , the first receiver 1 and the second receiver 3 are received from every part of foveal reflex for being divided into N parts
The time returned is respectively , i.e. the first receiver 1
Received with the second receiver 3 and counted from the transmitting ultrasonic wave of transmitter 2, time interval is 's
Reflection frequency f1And f2And the angle α of the corresponding direction of the launch 4 and reflection direction 5.
3. the measuring method of pipe network flow as claimed in claim 1 or 2, it is characterised in that：It also includes：Controller 6, the control
Device processed 6 is connected with the first receiver 1, the receiver 3 of transmitter 2 and second respectively.
4. the measuring method of pipe network flow as claimed in claim 1, it is characterised in that：The N is the natural number more than 3.
5. the measuring method of pipe network flow as claimed in claim 1, it is characterised in that：The underwater speed of ultrasonic wave with
Water temperature is related, when water temperature is 20 DEG C, C=1492m/s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710263940.3A CN106895889A (en) | 2017-04-21 | 2017-04-21 | The measuring method of pipe network flow |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710263940.3A CN106895889A (en) | 2017-04-21 | 2017-04-21 | The measuring method of pipe network flow |
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| CN106895889A true CN106895889A (en) | 2017-06-27 |
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| CN201710263940.3A Pending CN106895889A (en) | 2017-04-21 | 2017-04-21 | The measuring method of pipe network flow |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110426531A (en) * | 2019-09-12 | 2019-11-08 | 吉林大学 | Subglacial stream flow velocity measuring system based on ultrasound and measurement method |
| CN114740220A (en) * | 2022-04-08 | 2022-07-12 | 武汉新烽光电股份有限公司 | Method for measuring linear flow velocity based on ultrasonic Doppler |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19722140A1 (en) * | 1996-05-27 | 1997-12-11 | Changmin Co | Multiple channel ultrasonic metering system for fluid flow in pipes |
| JP2000111375A (en) * | 1998-10-06 | 2000-04-18 | Kansai Electric Power Co Inc:The | Devices for continuously observing flow rate, turbidity of water, and hydraulic information |
| CN201007720Y (en) * | 2006-09-20 | 2008-01-16 | 松下电器产业株式会社 | Ultrasonic liquid measuring device |
| CN101573594A (en) * | 2006-12-29 | 2009-11-04 | 通用电气公司 | Ultrasonic flow meter using simultaneous time-of-flight and doppler methods |
| CN105486363A (en) * | 2016-01-21 | 2016-04-13 | 成都声立德克技术有限公司 | Ultrasonic gas flowmeter and measuring method |
-
2017
- 2017-04-21 CN CN201710263940.3A patent/CN106895889A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19722140A1 (en) * | 1996-05-27 | 1997-12-11 | Changmin Co | Multiple channel ultrasonic metering system for fluid flow in pipes |
| JP2000111375A (en) * | 1998-10-06 | 2000-04-18 | Kansai Electric Power Co Inc:The | Devices for continuously observing flow rate, turbidity of water, and hydraulic information |
| CN201007720Y (en) * | 2006-09-20 | 2008-01-16 | 松下电器产业株式会社 | Ultrasonic liquid measuring device |
| CN101573594A (en) * | 2006-12-29 | 2009-11-04 | 通用电气公司 | Ultrasonic flow meter using simultaneous time-of-flight and doppler methods |
| CN105486363A (en) * | 2016-01-21 | 2016-04-13 | 成都声立德克技术有限公司 | Ultrasonic gas flowmeter and measuring method |
Non-Patent Citations (1)
| Title |
|---|
| KOEN BLANCKAERT: "Mean Flow and Turbulence in open-channel Bend", 《JOURNAL OF HYDRAULIC ENGINEERING》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110426531A (en) * | 2019-09-12 | 2019-11-08 | 吉林大学 | Subglacial stream flow velocity measuring system based on ultrasound and measurement method |
| CN114740220A (en) * | 2022-04-08 | 2022-07-12 | 武汉新烽光电股份有限公司 | Method for measuring linear flow velocity based on ultrasonic Doppler |
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Application publication date: 20170627 |
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