CN107356297A - Plug-in type ultrasonic flowmeter, Flow Measuring System and method - Google Patents
Plug-in type ultrasonic flowmeter, Flow Measuring System and method Download PDFInfo
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- CN107356297A CN107356297A CN201710568131.3A CN201710568131A CN107356297A CN 107356297 A CN107356297 A CN 107356297A CN 201710568131 A CN201710568131 A CN 201710568131A CN 107356297 A CN107356297 A CN 107356297A
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- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 23
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- 238000009434 installation Methods 0.000 claims description 11
- 238000007726 management method Methods 0.000 claims description 10
- 238000013500 data storage Methods 0.000 claims description 8
- 239000012530 fluid Substances 0.000 claims description 8
- 238000009530 blood pressure measurement Methods 0.000 claims description 6
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- 230000037431 insertion Effects 0.000 description 11
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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
- G01F1/66—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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- 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
- G01F1/662—Constructional details
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
- G01F15/18—Supports or connecting means for meters
Abstract
The invention provides a kind of plug-in type ultrasonic flowmeter, Flow Measuring System and method, is related to flow measurement metering field.The plug-in type ultrasonic flowmeter includes the first plug in sensor and the second plug in sensor, the first ultrasonic transducer is provided with first plug in sensor, the second ultrasonic transducer is provided with second plug in sensor, first plug in sensor and second plug in sensor are separately positioned on the upstream and downstream of the pipeline, and first ultrasonic transducer and second ultrasonic transducer are oppositely arranged.Compared with prior art, the signal reception of plug-in type ultrasonic flowmeter provided by the invention is stronger, and interchannel noise is smaller, therefore power consumption is smaller to be powered with electricity consumption pond, and it can also be accurately measured pipeline water flow low flow velocity and flow.
Description
Technical field
The present invention relates to flow monitoring field, in particular to a kind of plug-in type ultrasonic flowmeter, flow measurement system
System and method.
Background technology
With weary, and the increasingly raising of energy-saving and emission-reduction standard of increasingly bursting of water resource, the accurate measurement of water and supply water to
The system high efficiency management of water, it has also become one of urgent task of current water industry.The average water loss in general city according to statistics
In 20-30% or so.This is the loss of huge resource and the energy.Just need to add on waterline to reduce this loss
Flowmeter is filled, real time on-line monitoring is carried out to pipe network flow and pressure.But because most of pipe network has been laid and is runed more
Year, installing pipeline section type flowmeter or water meter needs to cut off the water, while also needs to cut off existing pipeline section, and engineering cost is higher, therefore manages
Segmentation flowmeter or water meter are limited in practical application.
In recent years, DMA zone meterings method in the leak water detdction of city by most attention.But in force, people
It was found that with the increase of line size, the cost of required pipeline section type flowmeter or water meter also rises rapidly, and this allows for city confession
Draining company has to the installation number of reduction table.This is equal to be the subregion scope for expanding leak water detdction, so as to reduce
The efficiency and accuracy of leak water detdction.
Plug-type ultrasonic flowmeter need not cut off existing pipeline, without cutting off the water, can with installation with pressure, its is easy for construction,
Quickly.Also, its cost changes less with line size, therefore receives significant attention.
Existing inserting-type flowmeter mainly has mechanical, electromagnetic type and ultrasonic type.Plug-in type mechanical meters, refer to
Traditional mechanical current meter such as propeller current meter, turbine current meter etc., it is arranged on the mode of insertion in pipeline.This kind of stream
Gauge has the common weakness of mechanical flowmeter：Easy to wear, easy blocking or stuck, initial-flow is high, and precision is low etc..Therefore it is actual
Limit in very big, it is difficult to detected for accurate measurement and pipe network water leakage.
Electromagnetic flowmeter no-rotary part is inserted, maintenance cost is low can be with battery powered.But it is easily by electromagnetic environment
And the influence of medium conductance, it is not ideal enough additionally, due to the measurement of its low flow velocity, along with cost is high, therefore only make on a small quantity
With.
Insertion ultrasonic flowmeter has the advantages of no-rotary part, maintenance cost is low.It is usually using a pair of transducers.
Its transducer be arranged on pipeline both sides, face-to-face or be separated by a certain distance in pipeline homonymy.Transducer is generally and inner-walls of duct
Flush or near inside pipe wall.Therefore, in measurement, acoustic signals are needed through relatively long distance, such as one times to two times caliber,
Acoustic attenuation is larger, and this requires stronger transmission power, and more complicated Testing of Feeble Signals and processing calculate, then, system power dissipation
It is generally large, it is difficult to realize battery powered.Urban pipe network is at the node for needing to install flowmeter, usually without power supply.If
Flowmeter is not battery powered, can not just be used.
Further, since the noise in reception signal is stronger, insertion ultrasonic flow rate measurement amount low flow velocity is more difficult, Wu Fayong
In leak water detdction.
Furthermore, it is necessary to sensor relative distance be adjusted according to actual conditions, so that reception signal in installation process
Intensity reaches optimal.Therefore, the zero point of system can not accurately determine, and influence measurement result.
In summary, there is presently no a kind of preferable inserting-type flowmeter, it is reliable and stable and can both can be easily installed
Ground works, and not only maintenance cost was low but also moderate, while can also battery powered and detection low flow velocity.Both are to reality after particularly
Border application has very important significance.Because waterline major part place can not or be not easy to get civil power, the power supply of flowmeter
As it is especially important the problem of.On the other hand, leak is belonging to dark leakage in early days, and its flow velocity is smaller, but because the pipe of defeated pipe network
Footpath is all larger, and the water of corresponding leak is not really small, and so, the low flow velocity performance of flowmeter is just very crucial to leak water detdction.
The content of the invention
It is an object of the invention to provide a kind of plug-in type ultrasonic flowmeter, Flow Measuring System and method, it can
It is effectively improved above mentioned problem.
What embodiments of the invention were realized in：
In a first aspect, the embodiments of the invention provide a kind of plug-in type ultrasonic flowmeter, applied to pipeline, the insertion
Formula ultrasonic flowmeter includes the first plug in sensor and the second plug in sensor, is set on first plug in sensor
The first ultrasonic transducer is equipped with, the second ultrasonic transducer is provided with second plug in sensor, described first inserts
Enter formula sensor and second plug in sensor is separately positioned on the upstream and downstream of the pipeline, first ultrasonic wave
Transducer and second ultrasonic transducer are oppositely arranged.
In preferred embodiments of the present invention, first plug in sensor and second plug in sensor rigidity
Connection, its relative position is fixed, so that sensor zero point, instrument coefficient and the systematic function of the plug-in type ultrasonic flowmeter
Fix without changing because of installation.
In preferred embodiments of the present invention, first plug in sensor is gone back on the different height in the pipeline
Be provided with multiple ultrasonic transducers, be additionally provided with second plug in sensor with first plug in sensor
Multiple ultrasonic transducer quantity are identical and multiple ultrasonic transducers of position correspondence, first plug in sensor and
Each two ultrasonic transducer corresponding to position forms a ultrasonic wave sound channel on second plug in sensor, each described
The centerline axis parallel of straight line and the pipeline where ultrasonic wave sound channel.
In preferred embodiments of the present invention, the plug-in type ultrasonic flowmeter also includes the first perforate pedestal and second
Perforate pedestal, first plug in sensor are fixedly connected by the first perforate pedestal with the pipeline, and described second
Plug in sensor is fixedly connected by the second perforate pedestal with the pipeline.
In preferred embodiments of the present invention, the plug-in type ultrasonic flowmeter also includes base joint, and described
One perforate pedestal is fixedly connected with the second perforate pedestal by the base joint.
In preferred embodiments of the present invention, axle is provided with the first perforate pedestal and the second perforate pedestal
To index line, the centerline axis parallel of the axial index line and the pipeline.
In preferred embodiments of the present invention, on first plug in sensor and second plug in sensor
Scale or neck are provided with, so that first plug in sensor and second plug in sensor are inserted in the pipeline
Depth it is identical.
In preferred embodiments of the present invention, the plug-in type ultrasonic flowmeter also includes the first ball valve and the second ball
Valve, first ball valve are fixedly connected by screw thread or flange with the first perforate pedestal, and second ball valve passes through screw thread
Or flange is fixedly connected with the second perforate pedestal, the internal diameter of first ball valve and the first perforate pedestal is more than described
The internal diameter of the external diameter of first plug in sensor, second ball valve and the second perforate pedestal is more than second plug-in type
The external diameter of sensor.
In preferred embodiments of the present invention, the plug-in type ultrasonic flowmeter also includes the first inserted link locking piece and the
Two inserted link locking pieces, first plug in sensor is fixed by the first inserted link locking key and first ball valve to be connected
Connect, second plug in sensor is fixedly connected by the second inserted link locking piece with second ball valve.
Second aspect, the embodiments of the invention provide a kind of Flow Measuring System, and it includes plug-in type as described above and surpassed
Acoustic wave flow meter, time difference measurement unit, reference clock unit, MCU microprocessors, LCD/Buttons is shown and push-button unit,
INTF interface units, DL peripheral data storage units, RTC real time clock units and PMU battery management units, the time difference survey
Amount unit and the MCU microprocessors are connected with the plug-in type ultrasonic flowmeter respectively, the reference clock unit and institute
State MCU microprocessors to be connected with the time difference measurement unit respectively, the LCD/Buttons is shown and push-button unit, described
INTF interface units, the DL peripheral data storage units, the RTC real time clock units and the PMU battery managements list
Member is connected with the MCU microprocessors respectively, and the sensor incoming end of the time difference measurement unit is additionally provided with multichannel conversion
Switch.
In preferred embodiments of the present invention, the Flow Measuring System also includes temperature sensor, pressure sensor, temperature
Measuring unit TMP and pressure measurement cell P is spent, the temperature sensor is arranged at the first of the plug-in type ultrasonic flowmeter
On plug in sensor or the second plug in sensor, the temperature measurement unit TMP connects with the time difference measurement unit, institute
State the first plug in sensor or the second plug in sensor that pressure sensor is arranged at the plug-in type ultrasonic flowmeter
On, the pressure measurement cell P connects with the MCU microprocessors.
The third aspect, the embodiment of the present invention additionally provide a kind of flow-measuring method, are surveyed applied to flow as described above
Amount system, methods described include：Obtain ultrasonic signal be from upstream to downstream propagation time tdn and ultrasonic signal under
Swim over to the propagation time tup of upstream；Obtain the propagation time difference dt between tdn and tup；Ultrasonic signal is obtained to be from upstream to down
Trip or ultrasonic signal swim over to the diffusion path length L of upstream from down, and calculate the point flow velocity V=L/ (tup* at transducer
Tdn) * dt, conduit section mean flow rate Va=Ki*Kp*V, pipeline flow Q=π * R2* Va, wherein, Kp is fluid velocity profile coefficient,
Kc is meter calibration coefficient, and R is pipeline inside radius.
Plug-in type ultrasonic flowmeter, Flow Measuring System and method provided in an embodiment of the present invention, by pipeline
Upstream and downstream sets the first plug in sensor and the second plug in sensor respectively, and in first plug in sensor
The first ultrasonic transducer and the second ultrasonic transducer are oppositely arranged with second plug in sensor, may make up one
Adjusting position and the flow velocity of spacing ultrasonic wave sound channel can be measured according to demand, the both ends of the ultrasonic wave sound channel are located in pipeline
Height it is identical so that the transmission quality of acoustic signals is higher, the point flow velocity being easy in accurate measurement pipe at sustained height.With showing
There is technology to compare, the signal reception of plug-in type ultrasonic flowmeter provided by the invention is stronger, and interchannel noise is smaller, makes stream
The hardware configuration of gauge greatly simplifies, and system power dissipation substantially reduces, and is easy to battery powered；Simultaneously as signal quality is good, system
It is high to the measurement accuracy of ultrasonic propagation time；Again because the first ultrasonic transducer and the second ultrasonic transducer are relative set
Put, so as to ensure that the accuracy of whole Flow Measuring System and its measure the ability of low flow velocity, can realize to pipeline water flow
The accurate measurement of low flow velocity and flow.
Brief description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below by embodiment it is required use it is attached
Figure is briefly described, it will be appreciated that the following drawings illustrate only certain embodiments of the present invention, therefore be not construed as pair
The restriction of scope, for those of ordinary skill in the art, on the premise of not paying creative work, can also be according to this
A little accompanying drawings obtain other related accompanying drawings.
Fig. 1 is the structural representation for the plug-in type ultrasonic flowmeter that first embodiment of the invention provides；
Fig. 2 is the structural representation for the Flow Measuring System that first embodiment of the invention provides；
Fig. 3 is the structural representation for the plug-in type ultrasonic flowmeter that second embodiment of the invention provides；
Fig. 4 is the structural representation for the Flow Measuring System that second embodiment of the invention provides；
Fig. 5 is the FB(flow block) for the flow-measuring method that third embodiment of the invention provides.
Icon：The plug in sensor of 100- first；The ultrasonic transducers of 120- first；140- the first perforate pedestals；142-
First ball valve；144- the first inserted link locking pieces；The plug in sensor of 200- second；The ultrasonic transducers of 220- second；240-
Two perforate pedestals；The ball valves of 242- second；244- the second inserted link locking pieces；300- pipelines；Crossbeam is linked under 400-；Linked on 420-
Crossbeam；500- temperature sensors；600- pressure sensors；700- time difference measurement units.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
Part of the embodiment of the present invention, rather than whole embodiments.The present invention implementation being generally described and illustrated herein in the accompanying drawings
The component of example can be configured to arrange and design with a variety of.
Therefore, below the detailed description of the embodiments of the invention to providing in the accompanying drawings be not intended to limit it is claimed
The scope of the present invention, but be merely representative of the present invention selected embodiment.It is common based on the embodiment in the present invention, this area
The every other embodiment that technical staff is obtained under the premise of creative work is not made, belong to the model that the present invention protects
Enclose.
It should be noted that：Similar label and letter represents similar terms in following accompanying drawing, therefore, once a certain Xiang Yi
It is defined, then it further need not be defined and explained in subsequent accompanying drawing in individual accompanying drawing.
In the description of the invention, it is necessary to explanation, term " in ", " on ", " under ", "left", "right", " interior ", " outer "
Orientation or position relationship Deng instruction are based on orientation shown in the drawings or position relationship, or are used to during the invention product use
The orientation or position relationship often put, it is for only for ease of and describes the present invention and simplify description, rather than indicates or imply and be signified
Device or element must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to the present invention
Limitation.In addition, term " first ", " second ", " the 3rd " etc. are only used for distinguishing description, and it is not intended that instruction or hint phase
To importance.
In addition, the term such as term " level ", " vertical ", " pendency " is not offered as requiring part abswolute level or pendency, and
It is to be slightly tilted.Such as " level " only refers to that its direction is more horizontal with respect to for " vertical ", is not to represent the structure
Must be fully horizontal, but can be slightly tilted.
In the description of the invention, it is also necessary to explanation, unless otherwise clearly defined and limited, term " setting ",
" installation ", " connected ", " connection " should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or one
Connect body；Can be mechanical connection or electrical connection；Can be joined directly together, can also be indirect by intermediary
It is connected, can is the connection of two element internals.For the ordinary skill in the art, on being understood with concrete condition
State the concrete meaning of term in the present invention.
In addition, the term such as " input ", " output ", " feedback ", " formation " is understood as describing a kind of optics, electricity change
Or optics, electricity processing.As " is formationed " only refer to optical signal or electric signal by the element, instrument or device afterwards there occurs
Change optically or electrically so that the optical signal or the electric signal are processed, and then are obtained and implemented technical scheme
Or the signal required for solution technical problem.
The present invention specific embodiment accompanying drawing in, in order to it is more preferable, it is clearer description plug-in type ultrasonic flowmeter and
The operation principle of each element in Flow Measuring System, the annexation of each several part in described device is showed, it is simply obvious to distinguish
Relative position relation between each element, it can not form to the optical path direction in element or structure, the order of connection and each several part
The restriction of structure size, size, shape.
First embodiment
Fig. 1 is refer to, a kind of plug-in type ultrasonic flowmeter is present embodiments provided, applied to pipeline 300.The insertion
Formula ultrasonic flowmeter includes the first plug in sensor 100, the second plug in sensor 200, the first perforate pedestal 140 and the
Two perforate pedestals 240.The first ultrasonic transducer 120, second insertion are provided with first plug in sensor 100
The second ultrasonic transducer 220, first plug in sensor 100 and second insertion are provided with formula sensor 200
Formula sensor 200 is separately positioned on the upstream and downstream of the pipeline 300, first ultrasonic transducer 120 and described
Two ultrasonic transducers 220 are oppositely arranged.In the present embodiment, first ultrasonic transducer 120 and second ultrasonic wave
The centerline axis parallel of the line of transducer 220 and the pipeline 300 forms an angle.In the present embodiment, it is preferred that described
First plug in sensor 100 and the second plug in sensor 200 are rigidly connected, and its relative position is fixed and will not be because of installation
And change, so that each structure function of the plug-in type ultrasonic flowmeter such as sensor zero point, instrument coefficient and systematicness
Can be fixed without changing because of installation.
In the present embodiment, first plug in sensor 100 passes through the first perforate pedestal 140 and the pipeline
300 are fixedly connected, and second plug in sensor 200 is fixed by the second perforate pedestal 240 and the pipeline 300 to be connected
Connect.In the present embodiment, the plug in sensor 200 of the first plug in sensor 100 and second can pass through insertion with pressure
Mounting means, the first perforate pedestal 140 and the second perforate pedestal 240 are each passed through, it is spaced apart to be arranged on pipeline
300 upstream and downstream.It is understood that the direction of fluid motion is from the upstream of pipeline 300 flow direction in the pipeline 300
Downstream, the upstream and downstream of the pipeline 300 can not be the both ends of pipeline 300, you can be arbitrarily along fluid in pipeline 300
Two points of direction of motion distribution or section.
In the present embodiment, the ultrasonic transducer 220 of the first ultrasonic transducer 120 and second is that one kind can utilize
High-frequency electrical energy is converted into the element of mechanical energy by piezo-electric effect, and its primary structure is piezoelectric ceramics.By installed in the first insertion
Transmission line of electricity in the plug in sensor 200 of formula sensor 100 and second is to the first ultrasonic transducer 120 or the second ultrasonic wave
Transducer 220 inputs certain voltage, you can the first ultrasonic transducer 120 or the second ultrasonic transducer 220 is made pottery towards piezoelectricity
The direction of vibration of porcelain disc face sends ultrasonic wave.
In the present embodiment, because the ultrasonic transducer 220 of the first ultrasonic transducer 120 and second is relative sets
Put, it is to be understood that connect by the ultrasonic signal that the first ultrasonic transducer 120 is sent by the second ultrasonic transducer 220
Receive；Relative, the ultrasonic signal sent by the second ultrasonic transducer 220 is then received by the first ultrasonic transducer 120.It is super
The transmitting of acoustic signals is alternately performed with receiving by this to transducer, and a ultrasound being mutually matched is formed between two transducers
Wave sound road, so as to complete to be from upstream to downstream, and swim over to from down the accurate measurement in the propagation time and time difference of upstream.
In the present embodiment, the ultrasonic transducer 220 of the first ultrasonic transducer 120 and second can be arranged on pipeline
On 300 central axis, can also be arranged on a certain distance from the central axis from pipeline 300 but with the pipeline of centerline axis parallel
On.It is understood that in order to reach optimal ultrasonic measurement effect, it is necessary to ensure first ultrasonic transducer 120
And the centerline axis parallel of the second line between ultrasonic transducer 220 and the pipeline 300, now between two transducers
The ultrasonic wave sound channel also centerline axis parallel with pipeline 300, it can be appreciated that now ultrasound signal transmission in ultrasonic wave sound channel
Direction and the fluid movement of pipeline 300 direction on the same line, transmitted noise now is minimum, signal quality highest,
It is just more accurate to measure the data obtained, to realize that the accurate measurement of current low flow velocity and flow provides guarantee.
Particularly, the first ultrasonic transducer 120 in the present embodiment and the second ultrasonic transducer 220 can also be relative
Be arranged in height different in pipeline 300, for example, one on the other, left and right stagger and be obliquely installed, now can be inclined by this
Projection of the ultrasonic wave sound channel on the central axis or the pipeline of a certain bar and centerline axis parallel of pipeline 300 is as the super of reality
Sound wave sound channel, and the data for measuring acquisition are converted accordingly, to obtain the horizontal stroke of two pipelines 300 where two transducers
Flow rate of water flow and flow in section.
In the present embodiment, in order to accurately ensure between the first plug in sensor 100 and the second plug in sensor 200
Relative position is fixed, the first perforate pedestal 140 and the second perforate pedestal 240 can be pre-machined in factory one into
Type, it can also be fixed together by for example lower link crossbeam 400 of base joint as shown in Figure 1.Particularly, first
The top of the plug in sensor 200 of plug in sensor 100 and second can also carry out dual add by upper link crossbeam 420
Gu.
In the present embodiment, the plug-in type ultrasonic flowmeter also includes the first ball valve 142 and the second ball valve 242, described
First ball valve 142 can be fixedly mounted in by screw thread or flange on the first perforate pedestal 140, second ball valve
242 can also be fixedly mounted in by screw thread or flange on the second perforate pedestal 240.Wherein, first ball valve 142
It is slightly larger than the external diameter of first plug in sensor 100 with the internal diameter of the first perforate pedestal 140, so as to the first plug-in type
Sensor 100 can pass through the perforate pedestal 140 of the first ball valve 142 and first；Likewise, second ball valve 242
It is slightly larger than the external diameter of second plug in sensor 200 with the internal diameter of the second perforate pedestal 240, so as to the second plug-in type
Sensor 200 can pass through the perforate pedestal 240 of the second ball valve 242 and second.
In the present embodiment, the plug-in type ultrasonic flowmeter also includes the first inserted link locking piece 144 and the second inserted link is locked
Determine part 244, first plug in sensor 100 is fixed by the first inserted link locking key 144 and the first ball valve 142 to be connected
Connect, second plug in sensor 200 is fixedly connected by the second inserted link locking piece 244 with the second ball valve 242.Pass through
Ball valve and inserted link locking piece are added, plug in sensor can be firmly fixed on perforate pedestal, further enhancing stream
The integrally-built stability of gauge.Preferably, the perforate pedestal in the present embodiment, ball valve, plug in sensor inserted link and insert
Junction between rod lock part uses waterproof sealing measure.
In the present embodiment, in order to help perforate pedestal to be positioned when being installed to pipeline 300 so that base axis and pipeline
300 axis are consistent, and axial index line, institute can be set on the first perforate pedestal 140 and the second perforate pedestal 240
State the centerline axis parallel of axial index line and the pipeline 300.
In the present embodiment, in order to ensure the first surpassing on the first plug in sensor 100 and the second plug in sensor 200
The ultrasonic transducer 220 of acoustic wave transducer 120 and second accurately can be set face-to-face, the He of the first plug in sensor 100
Insertion depth of second plug in sensor 200 in pipeline 300 is identical, now can be by the first plug in sensor
100 and second the scale pre-set on plug in sensor 200 or neck realize.Meanwhile the side of two plug in sensor
To also strictly to be controlled, the first plug in sensor 100 and the second plug in sensor 200 need to be made as far as possible parallel, here
It again may be by setting neck to realize on plug in sensor.It is understood that in the first plug in sensor 100 and
It can also set other that there is the construction package of positioning function on second plug in sensor 200, so that plug in sensor
Installation is more accurate.
In the present embodiment, temperature can also be set on the plug in sensor 200 of the first plug in sensor 100 or second
Sensor 500 and pressure sensor 600 are spent, for being obtained while the ultrasound signal transmission time difference is obtained in measuring environment
Hydraulic pressure and temperature data, to carry out corresponding error compensation calculating.
It is worth noting that, in the present embodiment, the plug in sensor 200 of the first plug in sensor 100 and second
Relative distance and position can be just fixed before dispatching from the factory and form a rigid connection body, such as by the present embodiment
Upper link crossbeam 420 realize, so as to ensure that the ultrasonic transducer 220 of the first ultrasonic transducer 120 and second
Between relative position will not produce change because of the error being likely to occur in construction and installation.Consequently, it is possible to as one just
Property the overall plug-in type ultrasonic flowmeter of connection measurement performance and instrument coefficient can also be demarcated before dispatching from the factory, these are not yet
It can be changed because of installation so that the overall structure of flowmeter is more stable, and measurement result is relatively reliable accurate.
Fig. 2 is refer to, the present embodiment additionally provides a kind of Flow Measuring System, and it includes plug-in type ultrasound as described above
Low, time difference measurement unit 700, reference clock unit, MCU microprocessors, LCD/Buttons is shown and push-button unit,
INTF interface units, DL peripheral data storage units, RTC real time clock units and PMU battery management units.The time difference surveys
Amount unit 700 and the MCU microprocessors be connected respectively with the plug-in type ultrasonic flowmeter, the reference clock unit with
The MCU microprocessors are connected with the time difference measurement unit 700 respectively, and the LCD/Buttons is shown and push-button unit, institute
State INTF interface units, the DL peripheral data storage units, the RTC real time clock units and the PMU battery managements
Unit is connected with the MCU microprocessors respectively.
In the present embodiment, when the first plug in sensor 100 of the plug-in type ultrasonic flowmeter or the second plug-in type
, can also phase in the Flow Measuring System when temperature sensor 500 and pressure sensor 600 are additionally provided with sensor 200
The setting temperature measurement unit TMP and pressure measurement cell P answered.The temperature measurement unit TMP and the time difference measurement unit
700 connection, the pressure sensor 600 be arranged at the plug-in type ultrasonic flowmeter the first plug in sensor 100 or
On second plug in sensor 200, the pressure measurement cell P connects with the MCU microprocessors.
Typically, the temperature measurement unit TMP can be realized in the time difference measurement unit 700, pressure measxurement
Unit can hang over MCU A/D conversion mouths.
In the present embodiment, the time difference measurement unit 700, it can select based on TOF single propagation time measuring methods
Chip, such as ACAM GP21/20/30, MAXIM MAX35101 etc.；The product based on sound endless form, such as D- can also be selected
FLOW scheme；The scheme of oneself can also be built according to the wiring block diagram in Fig. 2.The INTF interface units can be wireless
Interface, RS485 interfaces, MBUS interfaces, pulse interface etc..
In the present embodiment, the PMU battery management units can be converted into cell voltage various required voltages, except this
Outside, it is also responsible for managing various power consumption modes, so that the power consumption of system is minimum, increases the service life of battery.
In the present embodiment, the reference clock unit is that time difference measurement unit 700 provides accurate and stable reference frequency
Rate, it ensure that the precision of time difference measurement.The RTC real time clock units are that system provides the foundation clock and calendar, the calendar
It is important for data record.
In the present embodiment, (E can be selected in the DL data storage cells2PROM, EEPROM) it is logical
It is commonly used to store various flows and status information, including day accumulation, day maximum, minimum discharge, month to date, warning message etc..This
A little data can be in E in the case of system cut-off2Decades are kept in PROM.Particularly, the DL data storage cells can
Applied for meterage etc..
In the present embodiment, the temperature sensor 500 can be used for obtaining water temperature, to compensate shadow of the water temperature to measurement accuracy
Ring.The pressure sensor 600 can be used for the pressure information for obtaining the position in pipeline 300, and the pressure information is to ductwork pressure
Balance, prevent booster, reduce water leakage ratio, save water pump power consumption, be respectively provided with significance.
The plug-in type ultrasonic flowmeter that the present embodiment provides, the plug in sensor being oppositely arranged of uniqueness is employed,
Its signal reception is strong, and easy for installation and Stability Analysis of Structures is reliable, and material price and maintenance cost are low.Flow Measuring System then leads to
Cross PMU battery management units realizes battery powered for whole system, further through the large scale integrated circuit of low power consumption high-precision
Manufactured time difference measurement unit 700 realizes the accurate measurement to the current low flow velocity of pipeline 300 and flow, effectively solves city
The problem of power supply and low flow velocity detection in city's water transfer pipe network engineering, can to realize that the water system management of environmental protection and energy saving provides
Energy.
Second embodiment
Fig. 3 is refer to, present embodiments provides a kind of plug-in type ultrasonic flowmeter, and first embodiment of the invention maximum
Difference be that in the present embodiment, the first plug in sensor 100 in plug-in type ultrasonic flowmeter is in the pipeline 300
Multiple ultrasonic transducers are additionally provided with interior different height, are additionally provided with second plug in sensor 200 and institute
State that multiple ultrasonic transducer quantity on the first plug in sensor 100 are identical and multiple ultrasonic wave transducers of position correspondence
Device.Each two ultrasonic transducer corresponding to position on the plug in sensor 200 of first plug in sensor 100 and second
Between form a ultrasonic wave sound channel, centerline axis parallel of the straight line with the pipeline 300 where each ultrasonic wave sound channel.
Fig. 4 is refer to, the present embodiment additionally provides a kind of Flow Measuring System, and first embodiment of the invention maximum is not
Same to be, in the present embodiment, the sensor incoming end of time difference measurement unit 700 is additionally provided with multichannel change-over switch, by this
Change-over switch, each ultrasonic wave sound channel in multichannel sensor can individually be measured.
Relative to first embodiment of the invention, the present embodiment is multipair by being added at the different height of plug in sensor
Transducer, to form multiple ultrasonic wave sound channels, and each ultrasonic wave sound channel carries out single ultrasonic propagation time difference measurements,
The multi-group data at different height in pipeline 300 can be obtained, makes the result of the last flow velocity for calculating acquisition and flow more accurate
Really.
3rd embodiment
Fig. 5 is refer to, present embodiments provides a kind of flow-measuring method, applied to first embodiment of the invention or second
Flow Measuring System in embodiment.Methods described includes：
Step S800：Obtain ultrasonic signal be from upstream to downstream propagation time tdn and ultrasonic signal from downstream
To the propagation time tup of upstream；
Step S810：Obtain the propagation time difference dt between tdn and tup；
Step S820：Obtain ultrasonic signal and be from upstream to the propagation path that downstream or ultrasonic signal swim over to upstream from down
Length L, and calculate
Point flow velocity V=L/ (tup*tdn) * dt at transducer,
Conduit section mean flow rate Va=Ki*Kp*V,
Pipeline flow Q=π * R2* Va,
Wherein, Kp is fluid velocity profile coefficient, and Kc is meter calibration coefficient, and R is pipeline inside radius.
The flow-measuring method that the present embodiment provides, according to the relative distance between the time difference and transducer surveyed,
Point flow velocity of the fluid in transducer present position can be calculated, further according to fluid mechanics principle, you can according to the current meter
The mean flow rate and pipeline flow of conduit section are calculated, realizes the accurate measurement to flow velocity and flow.
In summary, plug-in type ultrasonic flowmeter, Flow Measuring System and method provided in an embodiment of the present invention, pass through
In the upstream and downstream of pipeline, the first plug in sensor and the second plug in sensor are set respectively, and in the described first insertion
The first ultrasonic transducer and the second ultrasonic transducer are oppositely arranged on formula sensor and second plug in sensor, can
Form one adjusting position and the flow velocity of spacing can measure ultrasonic wave sound channel, the both ends position of the ultrasonic wave sound channel according to demand
It is identical in the height in pipeline so that the transmission quality of acoustic signals is higher, the point being easy in accurate measurement pipe at sustained height
Flow velocity.Compared with prior art, the signal reception of plug-in type ultrasonic flowmeter provided by the invention is stronger, interchannel noise
It is smaller, greatly simplify the hardware configuration of flowmeter, system power dissipation substantially reduces, and is easy to battery powered；Simultaneously as signal matter
Measure, system is high to the measurement accuracy of ultrasonic propagation time；Again due to the first ultrasonic transducer and the second ultrasonic wave transducer
Device is to be oppositely arranged, and so as to ensure that the accuracy of whole Flow Measuring System and its measure the ability of low flow velocity, can be realized
Accurate measurement to pipeline water flow low flow velocity and flow.The preferred embodiments of the present invention are the foregoing is only, are not used to
The limitation present invention, for those skilled in the art, the present invention can have various modifications and variations.All essences in the present invention
God any modification, equivalent substitution and improvements made etc., should be included in the scope of the protection with principle.
Claims (12)
1. a kind of plug-in type ultrasonic flowmeter, applied to pipeline, it is characterised in that including the first plug in sensor and second
Plug in sensor, the first ultrasonic transducer, the second plug-in type sensing are provided with first plug in sensor
The second ultrasonic transducer is provided with device, first plug in sensor and second plug in sensor are set respectively
In the upstream and downstream of the pipeline, first ultrasonic transducer and second ultrasonic transducer are oppositely arranged.
2. plug-in type ultrasonic flowmeter according to claim 1, it is characterised in that first plug in sensor and
Second plug in sensor is rigidly connected, and its relative position is fixed, so that the sensing of the plug-in type ultrasonic flowmeter
Device zero point, instrument coefficient and systematic function fixation because of installation without changing.
3. plug-in type ultrasonic flowmeter according to claim 1, it is characterised in that first plug in sensor exists
Multiple ultrasonic transducers are additionally provided with different height in the pipeline, are additionally provided with second plug in sensor
Identical and multiple ultrasonic wave transducers of position correspondence with multiple ultrasonic transducer quantity on first plug in sensor
Each two ultrasonic transducer structure corresponding to position on device, first plug in sensor and second plug in sensor
Into a ultrasonic wave sound channel, the centerline axis parallel of straight line and the pipeline where each ultrasonic wave sound channel.
4. plug-in type ultrasonic flowmeter according to claim 1, it is characterised in that also including the first perforate pedestal and
Two perforate pedestals, first plug in sensor are fixedly connected by the first perforate pedestal with the pipeline, and described
Two plug in sensor are fixedly connected by the second perforate pedestal with the pipeline.
5. plug-in type ultrasonic flowmeter according to claim 4, it is characterised in that described also including base joint
First perforate pedestal is fixedly connected with the second perforate pedestal by the base joint.
6. plug-in type ultrasonic flowmeter according to claim 4, it is characterised in that the first perforate pedestal and described
Axial index line, the centerline axis parallel of the axial index line and the pipeline are provided with second perforate pedestal.
7. plug-in type ultrasonic flowmeter according to claim 4, it is characterised in that also including the first ball valve and the second ball
Valve, first ball valve are fixedly connected by screw thread or flange with the first perforate pedestal, and second ball valve passes through screw thread
Or flange is fixedly connected with the second perforate pedestal, the internal diameter of first ball valve and the first perforate pedestal is more than described
The internal diameter of the external diameter of first plug in sensor, second ball valve and the second perforate pedestal is more than second plug-in type
The external diameter of sensor.
8. plug-in type ultrasonic flowmeter according to claim 7, it is characterised in that also including the first inserted link locking piece and
Second inserted link locking piece, first plug in sensor is fixed by the first inserted link locking key and first ball valve to be connected
Connect, second plug in sensor is fixedly connected by the second inserted link locking piece with second ball valve.
9. plug-in type ultrasonic flowmeter according to claim 1, it is characterised in that first plug in sensor and
Scale or neck are provided with second plug in sensor, so that first plug in sensor and described second is inserted
It is identical to enter the depth that formula sensor is inserted in the pipeline.
10. a kind of Flow Measuring System, it is characterised in that including the plug-in type ultrasonic wave as described in any one of claim 1 to 9
Flowmeter, time difference measurement unit, reference clock unit, MCU microprocessors, LCD/Buttons is shown and push-button unit, INTF connect
Mouth unit, DL peripheral data storage units, RTC real time clock units and PMU battery management units,
The time difference measurement unit and the MCU microprocessors are connected with the plug-in type ultrasonic flowmeter respectively,
The reference clock unit and the MCU microprocessors are connected with the time difference measurement unit respectively,
The LCD/Buttons is shown and push-button unit, the INTF interface units, the DL peripheral data storage units, institute
State RTC real time clock units and the PMU battery management units be connected with the MCU microprocessors respectively,
The sensor incoming end of the time difference measurement unit is additionally provided with multichannel change-over switch.
11. Flow Measuring System according to claim 10, it is characterised in that also including temperature sensor, pressure sensing
Device, temperature measurement unit TMP and pressure measurement cell P,
The temperature sensor is arranged at the first plug in sensor or the second plug-in type of the plug-in type ultrasonic flowmeter
On sensor, the temperature measurement unit TMP connects with the time difference measurement unit,
The pressure sensor is arranged at the first plug in sensor or the second plug-in type of the plug-in type ultrasonic flowmeter
On sensor, the pressure measurement cell P connects with the MCU microprocessors.
12. a kind of flow-measuring method, applied to the Flow Measuring System described in any one of claim 10 to 11, its feature exists
In methods described includes：
Obtain ultrasonic signal and be from upstream to the propagation time tdn in downstream and when ultrasonic signal swims over to the propagation of upstream from down
Between tup；
Obtain the propagation time difference dt between tdn and tup；
Acquisition ultrasonic signal is from upstream to downstream or ultrasonic signal and the diffusion path length L of upstream is swum over to from down, and calculates
Point flow velocity V=L/ (tup*tdn) * dt at transducer,
Conduit section mean flow rate Va=Ki*Kp*V,
Pipeline flow Q=π * R2* Va,
Wherein, Kp is fluid velocity profile coefficient, and Kc is meter calibration coefficient, and R is pipeline inside radius.
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| CN108132079A (en) * | 2017-12-22 | 2018-06-08 | 马鞍山合力仪表有限责任公司 | A kind of scene flow detector |
| CN108151813A (en) * | 2018-02-06 | 2018-06-12 | 济宁五颗星表计有限公司 | Valve control ultrasonic water meter based on NB-IOT |
| CN109084853A (en) * | 2018-08-31 | 2018-12-25 | 浙江启尔机电技术有限公司 | A kind of axial direction multichannel formula ultrasonic flow rate measuring device |
| CN109341794A (en) * | 2018-12-24 | 2019-02-15 | 南京光声超构材料研究院有限公司 | Ultrasonic flowmeter and the method for adjusting energy converter |
| CN109544891A (en) * | 2018-11-30 | 2019-03-29 | 黄维 | A kind of waterpower on-site data gathering device |
| CN110057923A (en) * | 2019-05-22 | 2019-07-26 | 嘉兴勤慎智能技术有限公司 | A kind of ultrasonic sensor |
| CN110455360A (en) * | 2019-08-28 | 2019-11-15 | 杭州乾博科技有限公司 | A kind of ultrasonic water meter |
| CN110455359A (en) * | 2019-08-28 | 2019-11-15 | 杭州乾博科技有限公司 | A kind of ultrasonic water meter and metering method |
| CN110455358A (en) * | 2019-08-28 | 2019-11-15 | 杭州乾博科技有限公司 | A kind of measurable ultrasonic water meter with verification |
| CN110455357A (en) * | 2019-08-28 | 2019-11-15 | 杭州乾博科技有限公司 | A kind of Bi-directional Ultrasonic wave water meter |
| CN112013917A (en) * | 2020-08-14 | 2020-12-01 | 泉州七洋机电有限公司 | Automatic water leakage alarm type ultrasonic water meter with secondary pipeline reinforcing structure |
| CN112136023A (en) * | 2019-03-16 | 2020-12-25 | 石油和天然气计量设备公司 | Small ultrasonic flowmeter, in particular for gases |
| CN113574349A (en) * | 2019-01-18 | 2021-10-29 | 传感频谱有限责任公司 | Ultrasonic gas meter and associated flow tube |
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Application publication date: 20171117 |