CN208000145U - A kind of liquid flow measurement device based on sound wave matrix - Google Patents
A kind of liquid flow measurement device based on sound wave matrix Download PDFInfo
- Publication number
- CN208000145U CN208000145U CN201820542533.6U CN201820542533U CN208000145U CN 208000145 U CN208000145 U CN 208000145U CN 201820542533 U CN201820542533 U CN 201820542533U CN 208000145 U CN208000145 U CN 208000145U
- Authority
- CN
- China
- Prior art keywords
- sound wave
- flow
- ultrasonic probe
- liquid
- wave matrix
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Measuring Volume Flow (AREA)
Abstract
The utility model discloses a kind of liquid flow measurement devices based on sound wave matrix, belong to flow measurement technology field.A kind of liquid flow measurement device based on sound wave matrix, including the internal rectangle for the hollow structure that can be flowed liquid through are surveyed water tank and are arranged in two groups of ultrasonic probes for surveying two opposite sides inside water tank;Two groups of ultrasonic probes are arranged in arrays and correspond, and the flow direction of line and liquid between corresponding two ultrasonic probes is arranged at angle;Ultrasonic probe is connect with the measurement portion in control box.The utility model to carry out flow measurement to fluid provided with ultrasonic probe composition sound wave matrix, can measure that sustained height different location is different in flow rate, accurately reflect the whole flow velocity of fluid, achieved the purpose that accurate measurement.The utility model is simple in structure, practical and convenient, and it is accurate to measure.
Description
Technical field
The utility model is related to a kind of liquid flow measurement devices based on sound wave matrix, belong to flow measurement technology neck
Domain.
Background technology
Before the 1980s, domestic and international nearly all hydrometric station all uses the flow velocity-based on rotating element current meter
The mean flow rate of area-method observation river cross-section layout points simultaneously calculates flow.Due to have it is accurate, stable, simple in structure, be easy to
The characteristics of grasp, the contact current measuring instrument of this classics are still the main tool of China's river discharge detection.But due to day
It is also big that the site environment that point-measurement technique obtains or cost is very high and severe is difficult to be utilized in the Turbulent characteristics of right river complexity
The big difficulty for increasing hydrology detection does not only result in river flow under the extreme conditions such as flood and arid, flow field for a long time
And the flow information of water such as total runoff rate of change are difficult to obtain in time, and cause people limited to the understanding of Turbulence in Open channel Flow, it is many
It should cannot all be well solved with the fluid mechanics problem that turbulent theory is solved in hydraulic engineering.Flow rate test technology
Till now, test method is even more a piece very act, such as propagation speed differential method, beam deviation hair, Doppler method, spatial filtering method
Etc..The flow test facility of China's early stage is largely to lean on import, we have accurately grasped this technology now, and
Rapid to go into operation to process industrial, energy meter, urban public utilities, this also promotes flow instrument to rapidly develop.Microelectric technique
With the even more great update for having pushed flow instrument of developing by leaps and bounds of computer technology, new flow instrument is also as after rain
It is emerged as spring bamboo.
Ultrasonic wave just carries the flow rate information of upper fluid when being propagated in the fluid of flowing.When passing through concurrent-countercurrent when sonic transmissions
The time difference of generation can detect the flow velocity of fluid, to be converted into flow.Ultrasonic pulse reaches another from a sensor
A sensor.When liquid does not flow, ultrasonic pulse is propagated in two directions with identical speed.If the liquid in babinet
There is certain flow velocity (flow velocity centainly be more than zero), then can transmit faster, and reverse flow side along the ultrasonic pulse of flowing
To ultrasonic pulse can be slow.Fair current transmission time can be shorter in this way, and the countercurrent time can be longer.According to relevant
Computational methods calculate outflow.
Utility model content
The purpose of this utility model be to provide it is a kind of can accurately carry out flow velocity measure so that obtain flow based on sound wave
The liquid flow measurement device of matrix.
To achieve the goals above, the technical solution adopted in the utility model is:
A kind of liquid flow measurement device based on sound wave matrix, including the internal hollow structure for that can flow liquid through
Rectangle survey water tank and be arranged survey water tank inside two opposite sides two groups of ultrasonic probes;Two groups of ultrasonic probes
Arranged in arrays and correspond, the flow direction of line and liquid between corresponding two ultrasonic probes is set at angle
It sets;Ultrasonic probe is connect with the measurement portion in control box.
Technical solutions of the utility model further improvement lies in that:Water conservancy diversion frame is fixedly installed in the fluid inlet end for surveying water tank.
Technical solutions of the utility model further improvement lies in that:The inside rounded corner of water conservancy diversion frame.
Technical solutions of the utility model further improvement lies in that:The inside bevelling of water conservancy diversion frame.
Technical solutions of the utility model further improvement lies in that:Measurement portion includes gate circuit selector and AND gate circuit
The ARM microcontrollers and time figure chip of selector connection;Time figure chip is also connect with ARM microcontrollers;Ultrasonic probe
AND gate circuit selector connects.
Technical solutions of the utility model further improvement lies in that:Every group of ultrasonic probe is in horizontal liquid flow direction
Setting 2~4, every group of ultrasonic probe are arranged 4~8 in vertical direction.
A kind of measurement method of liquid flow measurement device of the use based on sound wave matrix, measuring device is put into and needs to survey
In the liquid of the flowing of amount, start measuring device;Ultrasonic probe periodical launch signal, measurement portion calculate upstream and downstream
Differential time of flight, the flow rate of liquid that a pair of of ultrasonic probe measures then is calculated by formula, formula is as follows,
In formula, Δ t is the differential time of flight of upstream and downstream, c0For the velocity of sound in liquid, α is the super of signal sending end
Line between sonic probe and the ultrasonic probe of signal receiving end and the angle between the flow direction of liquid, L are to measure
The path of pipeline section;
Cross-sectional area in conjunction with flow after calculating flow velocity obtains the whole flow for flowing through sound wave matrix.
Integration obtains complete flow rate of liquid after every layer of ultrasonic probe measures single layer flow velocity.
Measure the path L=c of pipeline section0* T*N/2, wherein c0 are the velocity of sound in liquid, and T is that arteries and veins occurs for ultrasonic probe
Rush the period of signal
By adopting the above-described technical solution, the technique effect that the utility model obtains has:
The utility model can effectively avoid the shakiness because of flow-shape due to carrying out flow measurement by sound wave matrix
Calmly, the problem of can not being accurately measured caused by.Since every group of ultrasonic probe is in horizontal liquid flow direction setting 2~4
A, it is different in flow rate thus to measure sustained height different location, effectively avoid different location it is different in flow rate cause with
It is practical to measure the problem for differing larger.Every group of ultrasonic probe is arranged 4~8 in vertical direction, can effectively avoid difference
Fluid layer flow velocity different problems accurately reflect the whole flow velocity of current fluid, achieve the purpose that accurately to measure.
The utility model is avoided and is brought because civil engineering is nonstandard due to surveying cisten mechanism using the rectangle of standard
The influence of cross-sectional area inaccuracy.Accurate flow velocity after integration, the cross-sectional area of standard allow the water flow in river very
Easily obtain.
The utility model in input end setting water conservancy diversion frame due to can effectively avoid making because flow abruptly enters device
It is lost at excessive flow velocity, flow can be made to be flowed in survey water tank more steady, can more accurately measure flow velocity.
The apparatus for measuring liquid flow speed of the utility model can be suitable for water channel, pipeline etc. and be not easy to measure the occasion of flow velocity,
Flow velocity measurement can be accurately carried out, it is easy to operation, it measures accurate.
Description of the drawings
Fig. 1 is the utility model stereoscopic schematic diagram;
Fig. 2 is the utility model front view;
Fig. 3 is the utility model measurement portion schematic diagram;
Wherein, 1 water tank, is surveyed, 2, ultrasonic probe, 3, water conservancy diversion frame.
Specific implementation mode
Below in conjunction with the accompanying drawings and specific embodiment is described in further details the utility model:
The utility model discloses a kind of apparatus for measuring liquid flow speed using sound wave matrix, under varying environment
The device that flow rate of liquid measures, by the way that ultrasonic probe is arranged in arrays come the accurate whole flow velocity for measuring liquid, into
And obtain the flow of liquid.Here is specific embodiment:
The utility model discloses a kind of liquid flow measurement devices based on sound wave matrix, as shown in Figure 1 and Figure 2, including
The survey water tank 1 of rectangle and two groups of ultrasonic probes 2;The survey water tank 1 of rectangle is hollow structure and both ends open, liquid (example
Such as water) the survey water tank 1 of hollow structure can be flowed through;The inside that two groups of ultrasonic probes 2 are separately positioned on survey water tank 1 is opposite
On two sides, the rectangular arrangement of every group of ultrasonic probe 2, the ultrasonic probe 2 on a side is on another side
Corresponded there are one ultrasonic probe.Ultrasonic probe is transmitting-receiving integrated, in actually measuring, if left side
On ultrasonic probe send ultrasonic probe of the signal then on right side and receive signal;Then signal sending end and signal receive
End reversion, i.e., the ultrasonic probe on right side send signal, and the ultrasonic probe on left side receives signal.Corresponding guarantor
Card ultrasonic signal can accurately send and receive;Ultrasonic probe 2 is connect with the measurement portion in control box, ultrasonic probe
2 by the signal transmission detected to measurement portion.The flow direction of line and liquid between corresponding two ultrasonic probes 2 at
Angle is arranged, i.e., the ultrasonic probe of one side is located at the upstream of fluid, and the ultrasonic probe of another side is located under fluid
Trip flows the line between the corresponding ultrasonic probe 2 positioned at upstream and the ultrasonic probe 2 positioned at downstream with liquid
Angle between direction is denoted as α.
It is further fixedly arranged on water conservancy diversion frame 3, inward flange and the survey water tank of the water conservancy diversion frame 3 at the fluid inlet end for surveying water tank 1
Medial surface it is concordant.The inside of water conservancy diversion frame 3 with bevelling or can can make flow enter the shadow that device is subject to rounded corner
Sound is small as far as possible, and the survey water tank that enters that fluid is capable of steady and smooth is vortexed without will produce interference, ensure that device measured
Accuracy.
Measurement portion includes gate circuit selector and the ARM microcontrollers and time figure core of the connection of AND gate circuit selector
Piece;Time figure chip is also connect with ARM microcontrollers;Ultrasonic probe AND gate circuit selector connects, specific as shown in Figure 3.
Due to using ARM microcontrollers as processing chip, it can be ensured that circuit can be very accurate by the time of logic gate, measures
Unit is triggered by start signals, stop signals cut-off, due to the position of ring oscillator and the count value of value counter
The time interval between start signals and stop signals can be calculated.After initialization, the high speed of time figure chip measures
Start-up operation just stops work until reaching the hits of setting or encountering after measurement is overflowed after unit receives start pulses
Make.The setting of HIT1 and HIT2 is handled data and gives ARM monolithic movements result output register by ALU after measurement
Piece.ARM singlechip chips can converse flow velocity with the signal that high speed processing is fed back by the time difference between two subpulses.
ARM microcontrollers are a kind of common singlechip chips, and the measurement for being used as the time herein is to have used the function of its time of measuring.It surveys
Amount portion, which mainly emits by ultrasonic probe and receives the process of signal, calculates the transmission time of signal, the flow velocity after being
Calculating provide condition.
In the measurement work of fluid flow, important is the measurements for flow velocity, and flow plane is combined after measuring flow velocity
Product can obtain the whole flow of liquid.Specific to be in the device by the single layer flow velocity gone out between every layer of ultrasonic probe
It integrates afterwards and obtains complete flow velocity, whole flow is obtained in conjunction with the cross-sectional area of flow.If measuring the stream by surveying water tank
Amount, then surveying the cross-sectional area of water tank can measure in advance;If measuring the flow of pipeline, the cross-sectional area of pipeline can
To calculate in advance.
Ultrasonic probe AND gate circuit selector connects.Every group of ultrasonic probe is in horizontal liquid flow direction setting 2
~4, when in this way can be to avoid by device, different location flow velocity different problems in device, every group of ultrasonic probe be perpendicular
Histogram, in this way can be to avoid because of river depth difference, the different problem of different depth flow velocity to setting 4~8.Matrix arrangement
Ultrasonic probe, single layer flow velocity can be measured.After i.e. every layer of ultrasonic probe can measure single layer flow velocity, then each layer is ultrasonic
The flow velocity that wave probe measures is integrated to obtain complete flow rate of liquid.When integrating liquid entirety flow velocity, can by the following method,
The flow velocity that middle layer position obtains is multiplied by larger coefficient 0.6-0.8, and the flow velocity that upper layer and lower layer obtain is multiplied by smaller
Coefficient 0.3-0.4, the flow velocity topmost obtained with bottom are multiplied by coefficient 0.1-0.2.In specific implement, sound wave matrix
The horizontal direction of ultrasonic probe and the number of vertical direction carry out adaptability according to the actual cross-sectional sizes for measuring fluid
Adjustment.
Specific in use, using the device to carry out the measurement of flow by the following method.Measuring device is put into
In the liquid for needing the flowing measured, start measuring device;Ultrasonic probe emits signal, and measurement portion calculates upstream and downstream
Differential time of flight, the flow rate of liquid that a pair of of ultrasonic probe measures then is calculated by formula, formula is as follows,
In formula, Δ t is the differential time of flight of upstream and downstream, can specifically be measured by measurement portion.c0In liquid
The velocity of sound, can directly obtain;Between lines and the flow direction of liquid of the α between corresponding two ultrasonic probes 2
Angle, this is that the parameter of the device is generally 1-8 °;L is the path for measuring pipeline section;
Cross-sectional area in conjunction with flow after calculating flow velocity obtains the whole flow for flowing through sound wave matrix.
Measure pipeline section path can the method for clicking accurately calculated:In sound wave pulse measurement, t is typically to pass through
Ranging counter is a to the clock pulses for entering counter during returning to reception system from transmitting pulse to target and from target
It is several accumulative to measure.Be located in the t times, there is N number of pulse to enter counter, clock cycle T, frequency of oscillation f.
L in formula is the distance of the period movement of a pulse ultrasonic wave, l=c0*T/2.When N is 1, pipeline is measured
Path L=c0*T/2.In order to improve measurement accuracy, typically emit N number of ultrasonic pulse signal within a time, accordingly
Pulse time-period shortens, L=c0* T*N/2, therefore it is known that the time of cycle T shorter i.e. frequency of oscillation is bigger, measurement accuracy
It can be higher.
Specifically during manufacturing use, ultrasonic probe is to be processed into mold injection molding by the angle of theoretical calculation
, it is various sizes of to survey the ultrasonic probe angle and mounting distance difference that water tank is processed.Ultrasonic probe mounting and fixing support
Distance and installation dimension are accurately processed by numerically controlled lathe, ultrasonic probe and rectangle are surveyed between water tank and hold out against spiral shell by fastening
Silk is fixed, and structural silicone adhesive seals, and reduces in transport because of the influence that vibrations generate probe positions.The ultrasound of injection molding
Wave probe is ultrasonic acoustic wedge structure, preferential, temperature compensation function is carried, water temperature shadow caused by probe precision is effectively reduced
It rings.
The measuring device that installation is complete is placed in the channel for needing to measure flow velocity in (such as water channel, river), is connected
Power supply, device for opening switch, the data that ultrasonic probe will measure under same even depth different location and same position different depth
Microcontroller processing, microcontroller processing and calculating are given together, obtain flow rate of liquid.
The measuring circuit with microcontroller is combined quickly can accurately to measure using ultrasonic probe in the utility model
Pass through the flow velocity of one group of ultrasonic probe.
The utility model to carry out flow measurement to fluid provided with ultrasonic probe composition sound wave matrix, can be effective
Avoid the problem that because flow-shape it is unstable, caused by can not accurately measure.Sustained height different location can be measured not
Same flow velocity, while different fluid layer flow velocity different problems can also be effectively avoided, accurately reflect fluid in current channel
Whole flow velocity, can achieve the purpose that accurately to measure.
Claims (6)
1. a kind of liquid flow measurement device based on sound wave matrix, it is characterised in that:It is that can flow liquid through including inside
The rectangle of hollow structure survey water tank (1) and setting and visited in two groups of ultrasonic waves for surveying the internal two opposite sides of water tank (1)
Head (2);Two groups of ultrasonic probes (2) correspond and arranged in arrays, between corresponding two ultrasonic probes (2)
The flow direction of line and liquid is arranged at angle;Ultrasonic probe (2) is connect with the measurement portion in control box.
2. a kind of liquid flow measurement device based on sound wave matrix according to claim 1, it is characterised in that:Survey water tank
(1) fluid inlet end fixed setting water conservancy diversion frame (3).
3. a kind of liquid flow measurement device based on sound wave matrix according to claim 2, it is characterised in that:Water conservancy diversion frame
(3) inside rounded corner.
4. a kind of liquid flow measurement device based on sound wave matrix according to claim 2, it is characterised in that:Water conservancy diversion frame
(3) inside bevelling.
5. a kind of liquid flow measurement device based on sound wave matrix according to claim 1, it is characterised in that:Measurement portion
The ARM microcontrollers and time figure chip connected including gate circuit selector and AND gate circuit selector;Time figure chip
Also it is connect with ARM microcontrollers;Ultrasonic probe AND gate circuit selector connects.
6. according to a kind of liquid flow measurement device based on sound wave matrix of Claims 1 to 5 any one of them, feature exists
In:Every group of ultrasonic probe (2) is arranged 2~4 in horizontal liquid flow direction, and every group of ultrasonic probe (2) is in vertical side
To setting 4~8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820542533.6U CN208000145U (en) | 2018-04-09 | 2018-04-09 | A kind of liquid flow measurement device based on sound wave matrix |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820542533.6U CN208000145U (en) | 2018-04-09 | 2018-04-09 | A kind of liquid flow measurement device based on sound wave matrix |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208000145U true CN208000145U (en) | 2018-10-23 |
Family
ID=63840477
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820542533.6U Active CN208000145U (en) | 2018-04-09 | 2018-04-09 | A kind of liquid flow measurement device based on sound wave matrix |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208000145U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108387279A (en) * | 2018-04-09 | 2018-08-10 | 河北科鼎机电科技有限公司 | A kind of liquid flow measurement device and measurement method based on sound wave matrix |
-
2018
- 2018-04-09 CN CN201820542533.6U patent/CN208000145U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108387279A (en) * | 2018-04-09 | 2018-08-10 | 河北科鼎机电科技有限公司 | A kind of liquid flow measurement device and measurement method based on sound wave matrix |
| CN108387279B (en) * | 2018-04-09 | 2024-05-24 | 河北科鼎智能科技有限公司 | Liquid flow measuring device and measuring method based on acoustic wave matrix |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Kraus et al. | New acoustic meter for measuring 3D laboratory flows | |
| CN102147275B (en) | Low-power-consumption and high-precision ultrasonic flow rate measuring method and device | |
| CN104569480B (en) | A kind of liquid impulse force Flow speed measurer and its measurement method | |
| CN102288235B (en) | Double-track mixed type ultrasonic flowmeter and measuring method | |
| CN108387279A (en) | A kind of liquid flow measurement device and measurement method based on sound wave matrix | |
| CN102261937A (en) | High-accuracy time-difference type ultrasonic flow meter and method for measuring flow thereof | |
| Nystrom et al. | Measurement of turbulence with acoustic doppler current profilers-sources of error and laboratory results | |
| CN103090916A (en) | Ultrasonic flow measurement device and ultrasonic flow measurement method | |
| Razaz et al. | An acoustic travel time method for continuous velocity monitoring in shallow tidal streams | |
| CN105181997A (en) | Non-contact ultrasonic flow velocity meter and non-contact flow velocity detection method | |
| CN114088151B (en) | External clamping type multichannel ultrasonic flow detection device and detection method | |
| CN110986892A (en) | Runoff flow velocity and flow monitoring method, monitoring device and monitoring system | |
| CN110346600A (en) | A kind of ultrasonic wind speed and direction measurement method | |
| CN208000145U (en) | A kind of liquid flow measurement device based on sound wave matrix | |
| CN106153173A (en) | Sonic velocity measurement method and device in a kind of water | |
| CN203148479U (en) | Ultrasonic flow measuring device | |
| JP2002340644A (en) | Ultrasonic flow and flow velocity-measuring instrument and ultrasonic flow and flow velocity-measuring method | |
| CN100383496C (en) | Ultrasonic method for flow measurement and device thereof | |
| Chandran et al. | Time of flight measurement system for an ultrasonic anemometer | |
| Bahreinimotlagh et al. | Investigation of flow condition in the haftbarm lake using acoustic tomography technology | |
| CN211783654U (en) | Low-cost wireless ultrasonic time difference method flow measurement equipment | |
| CN102023038A (en) | Ultrasonic measurement method for pipeline flux | |
| CN204556138U (en) | There is the pipeline section of the ultrasonic calorimeter of flow stabilizing function | |
| Gerasimov et al. | Influence of dynamic characteristics of electro-acoustic path on ultrasonic flowmeters accuracy | |
| CN202024794U (en) | Ultrasonic flow measuring device with low power consumption and high precision |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |