CN106768207B - A kind of weighing system for water flow device - Google Patents
A kind of weighing system for water flow device Download PDFInfo
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- CN106768207B CN106768207B CN201710035855.1A CN201710035855A CN106768207B CN 106768207 B CN106768207 B CN 106768207B CN 201710035855 A CN201710035855 A CN 201710035855A CN 106768207 B CN106768207 B CN 106768207B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F25/00—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume
- G01F25/10—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume of flowmeters
- G01F25/14—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume of flowmeters using a weighing apparatus
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F25/00—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Flow Control (AREA)
Abstract
The invention discloses a kind of weighing systems for water flow device, including Weighing module, signal integration module and control module；Weighing module have it is multiple, for acquiring the water flow of its corresponding water system；Signal integration module is electrically connected with Weighing module, and signal integration module is equipped with integrated signal interface identical with Weighing module quantity；Control module is equipped with the control signaling interface for being suitable for different flow range and matching with integrated signal interface；In application weighing system, the control signaling interface of link control module and the integrated signal interface of signal integration module are required according to range of flow, so that control module is connected to corresponding Weighing module by signal integration module.The present invention can be used in more set water flow devices, and be suitable for different range of flow requirements, and the weighing system is flexible in application and reliable, the quick and direct switching that can be suitable between multiple Weighing modules.
Description
Technical field
The present invention relates to flow detection technical fields, and in particular to a kind of weighing system for water flow device.
Background technique
Flow standard device is that metrological service and flowmeter manufacturing enterprise carry out transmission of quantity value, trace to the source and demarcate test job
One of standard device, to guaranteeing flowmeter product quality, promote the research and development of high-precision and new flowmeter that all there is important meaning
Justice.
Flow apparatus technical indicator has two indexs of expanded uncertainty and discharge stability, and expanded uncertainty determines
The calibration of instrument and calibration accuracy, expanded uncertainty are determined that weighing system includes two parts, commutator system by weighing system
With electronic scale Weighing system, when commutator system uncertainty numerical value very little, the precision of electronic scale Weighing system determines stream
The expanded uncertainty for measuring device is horizontal.
Currently, generally flow apparatus is designed to independent to demarcate and examine and determine the flow instrument of bore wider range
More set flow apparatus, i.e. without structure without electrical link between two covering devices.Due to the uniqueness of every set flow apparatus, design time
All higher with hardware cost, the construction time is also longer, and especially in high-accuracy water flow standard device, the price of weighing system is non-
Chang Gao becomes the principal element of flow apparatus cost.
Summary of the invention
For the defects in the prior art, the present invention provides a kind of weighing system for water flow device, can be used in
More set water flow devices, and be suitable for different range of flow requirements, and the weighing system flexible in application and reliable, Neng Goushi
For the quick and direct switching between multiple Weighing modules.
In order to solve the above technical problems, the present invention the following technical schemes are provided:
On the one hand, the present invention provides a kind of weighing system for water flow device, the weighing system includes weighing
Module, signal integration module and control module；
The Weighing module has multiple, and the Weighing module is used to acquire the water flow of its corresponding water system；
The signal integration module is electrically connected with the Weighing module, and the signal integration module is equipped with and the title
The identical integrated signal interface of molality number of blocks；
The control module is equipped with the control letter for being suitable for different flow range and matching with the integrated signal interface
Number interface；
In the application weighing system, according to range of flow require to connect the control module control signaling interface and
The integrated signal interface of the signal integration module so that the control module be connected to by the signal integration module it is described
Weighing module.
Further, each Weighing module include: sequentially connected water inlet switch valve, commutator, claim water container,
Electronic scale and water outlet switch valve further include the stepper motor connecting with the commutator, and are arranged in the stepper motor
The optoelectronic switch at both ends；
The water inlet switch valve is used to the water in pond flowing into the commutator；
For controlling water incision or cutting out the title water container, the optoelectronic switch is used for the commutation commutator
The position of device carries out signal acquisition and position limitation protection, and the electronic scale is used to weigh the water weight in the title water container, described
Water outlet switch valve makes water flow go back to the pond for filling the water and discharging water into the title water container.
Further, the signal integration module includes: signal integrated unit and integrated signal interface；
The signal integrated unit is used to integrate water inlet switch valve, water outlet switch valve, step in the weighing unit
Into motor and the electric signal of optoelectronic switch, and by integrated electric signal transmission to the integrated signal interface；
The quantity of the integrated signal interface is identical as the water flow Weighing module quantity.
Further, the signal integration module further include: marshalling cabinet；
The signal integrated unit and the integrated signal interface are arranged in the marshalling cabinet.
Further, the control module includes: control unit and control signaling interface；
Described control unit is connected to the control signaling interface, so that described control unit is through the control signaling interface
It is connected to the integrated signal interface of the signal integration module, and sends control signal to the signal integration module and obtains shape
State signal.
Further, the control module further include: control cabinet；
Described control unit is arranged in the control cabinet；
The inside of the control cabinet is arranged in the integrated signal interface.
Further, described control unit includes: industrial personal computer, board and pinboard；
The industrial personal computer is connected to the control signaling interface by PCI board card, pinboard and communication card, then connects
To the integrated signal interface in the signal integration module.
Further, the quantity of the integrated signal interface in the control module is at least 3, and this 3 integrated
Signaling interface is respectively suitable for different range of flows.
Further, the control module has multiple, and each control module is suitable for different range of flows.
Further, the quantity of the water flow Weighing module is at least 8, and every 2 Weighing modules are connected to
A set of flow device system.
As shown from the above technical solution, a kind of weighing system for water flow device of the present invention, including weighing
Module, signal integration module and control module；Weighing module has water flows that are multiple, and being used to acquire its corresponding water system
Amount；Signal integration module is electrically connected with Weighing module, and signal integration module is equipped with integrated letter identical with Weighing module quantity
Number interface；Control module is equipped with the control signaling interface for being suitable for different flow range and matching with integrated signal interface；?
When using weighing system, the control signaling interface of link control module and integrating for signal integration module are required according to range of flow
Signaling interface, so that control module is connected to Weighing module by signal integration module；It can be used in more set water flow devices, and
Suitable for different range of flow requirements, and the weighing system is flexible in application and reliable, can be suitable for multiple Weighing modules
Between quick and direct switching.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it is therefore apparent that the accompanying drawings in the following description is of the invention
Some embodiments for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other attached drawings.
Fig. 1 is a kind of a kind of structural representation of specific embodiment of weighing system for water flow device of the invention
Figure；
Fig. 2 is a kind of structural schematic diagram of specific embodiment of Weighing module 10 in weighing system of the invention；
Fig. 3 is a kind of structural schematic diagram of specific embodiment of signal integration module 20 in weighing system of the invention；
Fig. 4 is a kind of structural schematic diagram of specific embodiment of control module 30 in weighing system of the invention；
Fig. 5 is the weight method water flow device working principle diagram in application example of the invention；
Fig. 6 is the water flow device electrical systematic drawing in application example of the invention；
Fig. 7 is the weighing system electrical schematic diagram in application example of the invention；
Fig. 8 is the structural schematic diagram of marshalling cabinet in weighing system in application example of the invention；
Fig. 9 is the structural schematic diagram of control cabinet in weighing system in application example of the invention.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, the technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
The embodiment of the present invention one provides a kind of specific embodiment of weighing system for water flow device.Referring to
Fig. 1, the weighing system specifically include following content:
Weighing module 10, signal integration module 20 and control module 30.
The Weighing module 10 has multiple, and the Weighing module 10 is used to acquire the water flow of its corresponding water system
Amount.
Two Weighing modules 10 are normally applied in a set of water flow device, and two Weighing modules 10 are respectively used to adopt
Collect the water flow of the big flow range and small range of flow in water flow device.
The signal integration module 20 is electrically connected with the Weighing module 10, and the signal integration module 20 be equipped with
The identical integrated signal interface 23 of 10 quantity of Weighing module.
In signal integration module 20, considers the convenience that the range of flow of water flow device is expanded, weighing will be covered single more
Member, which is concentrated, is designed to a signal integration module 20, and the signal integration module 20 is equipped with and the water flow Weighing module 10
The identical integrated signal interface 23 of quantity, when using the system, signal integration module 20 is by integrated signal interface 23 and even
Wiring is connected to control module 30.
The control module 30 is equipped with the control for being suitable for different flow range and matching with the integrated signal interface 23
Signaling interface 32 processed.
In control module 30, in the application weighing system, required to connect the control module according to range of flow
30 control signaling interface 32 and the integrated signal interface 23 of the signal integration module 20, so that the control module 30 passes through
The signal integration module 20 is connected to the Weighing module 10.
As can be seen from the above description, embodiment of the invention discloses a kind of universal weighing systems for water flow device
System, the weighing system can be used in more set water flow devices, and be suitable for different range of flow requirements, and the weighing system
Quick and direct switching flexible in application and reliable, being suitable between multiple Weighing modules.
The embodiment of the present invention two provides the specific embodiment of the Weighing module 10 in above-mentioned weighing system.Referring to figure
2, which specifically includes following content:
Sequentially connected water inlet switch valve, claims water container, electronic scale and water outlet switch valve at commutator, further include with
The stepper motor of the commutator connection, and the optoelectronic switch at the stepper motor both ends is set；The water inlet switch
Valve flows into the commutator for the water in the pond；The commutator is for controlling water incision or cutting out the title water capacity
Device.The optoelectronic switch is used to carry out position tracking to the commutator, realizes that accurate metering water flows into the time for claiming water container
And position limitation protection；The electronic scale is used to weigh the water weight in the title water container；The water outlet switch valve is used for institute
It states to claim to fill the water and discharge water in water container and flows back to the pond.
The quantity of the water flow Weighing module 10 is at least 8, and general every 2 Weighing modules 10 are connected to one
Cover water flow device.
As can be seen from the above description, the embodiment of the present invention two discloses a kind of universal weighing for water flow device
Weighing module specific structure in system, the structure can efficiently and accurately weigh to water in water system, in turn
The water flow in water system can accurately be calculated.
The embodiment of the present invention three provides the specific embodiment of the signal integration module 20 in above-mentioned weighing system.Ginseng
See Fig. 3, which specifically includes following content:
Marshalling cabinet 21, signal integrated unit 22 and integrated signal interface 23.
The signal integrated unit 22 and integrated signal interface 23 are arranged in the marshalling cabinet 21.The signal is integrated
Unit 22 is used to integrate water inlet switch valve, water outlet switch valve, stepper motor and the optoelectronic switch in the Weighing module 10
Electric signal, and by integrated electric signal transmission to the integrated signal interface 23.
The quantity of the integrated signal interface 23 is identical as 10 quantity of Weighing module.
As can be seen from the above description, the embodiment of the present invention considers the convenience that the range of flow of water flow device is expanded, it will
It is designed to a signal integration module 20 in the electrical signal set of multiple Weighing modules 10, then will be believed by integrated signal interface 23
Signal integrated unit 22 and the control module 30 in number integration module 20 carry out connection accurately and securely.
The embodiment of the present invention four provides the specific embodiment of the control module 30 in above-mentioned weighing system.Referring to figure
4, which specifically includes following content:
Control unit 31, control signaling interface 32 and control cabinet 33.
Described control unit 31 is connected to the control signaling interface 32, so that described control unit 31 is believed through the control
Number interface 32 is connected to the integrated signal interface 23 of the signal integration module 20, and sends and control to the signal integration module 20
Signal processed and acquisition status signal.
Described control unit 31 and control signaling interface 32 are arranged in the control cabinet 33, and described control unit includes work
Control machine, board and pinboard.
The industrial personal computer is connected to the control signaling interface 32 by PCI board card, pinboard and communication interface board, it
The integrated signal interface 23 being connected in the signal integration module 20 afterwards.
The quantity of the control signaling interface 32 in the control module 30 is at least 3, and this 3 control signals connect
Mouth 32 is respectively suitable for different range of flows；
The control module 30 have it is multiple, and each control module 30 be suitable for different range of flows.
As can be seen from the above description, the embodiment of the present invention considers the convenience that the range of flow of water flow device is expanded, it will
Be designed to one in the electrical signal set of multiple Weighing modules 10, then by the control signaling interface 32 of the control module 30 with
Integrated signal interface 23 in the signal integration module 20 carries out connection accurately and securely, can be wanted according to range of flow
It asks so that the control module 30 is connected to the water flow Weighing module 10 by the signal integration module 20.
For further instruction this programme, the present invention also provides the application of a set of weighing system for water flow device is real
Example, the weighing system specifically include following content:
Fig. 5 is a set of weight method water flow standard apparatus working principle diagram in this programme, mainly by pond, water pump pipe
Line, pressure transmitter, voltage-stablizer of cooling down, checklist calibrating pipeline, standard scale pipeline, temperature transmitter, Weighing module 1 and weighing
Module 2 forms.
The Weighing module quantity of set of device determines by the instrument range of flow demarcated, the big Weighing module mark of big flow
Fixed, small flow is demarcated with smaller Weighing module.Standard scale pipeline is by upstream switch valve, standard scale, downstream damper, downstream switches
Valve group at, checklist pipeline is made of upstream switch valve, checklist, meter-clamping apparatus, downstream switches valve, discharging valve, water pump pipeline by
Switch valve, filter, water pump, check-valves, by-passing valve, bypass line composition.
The working principle of water flow device are as follows: starting water pump, water pump pass through water pump pipeline valve, water from pool water-pumping, water
Pump, pressure transmitter, pressure stabilizing getter container, checklist calibrating pipeline, standard scale pipeline, temperature transmitter, water inlet switch valve,
Commutator claims water container, water outlet switch valve to flow back to pond, after waiting stability of flow, passes through data Collection & Processing System meter
Calculation obtains the flow value of weight method, instrument can be demarcated and be examined and determine.
Dotted line frame in Fig. 5 is Weighing module, two Weighing modules of this set water flow standard apparatus principle diagram design, often
A Weighing module mainly switchs valve group by water inlet switch valve, commutator, stepper motor, title water container, electronic scale, water outlet
At.Water flow Weighing module working principle are as follows: industrial personal computer controls stepper motor operation, and stepper motor drives commutator to cut water
Claim water container weighed, record water flow into claim water container time and weight, by temperature transmitter acquire temperature value into
Trip temperature compensation operation, the exact flow rate value of available weight method, so that tested flow-meter is demarcated and be examined and determine.
In mostly set water flow device, there are multiple Weighing modules, in order to share Weighing module, respectively by each water flow
Weighing module is made into modular unit form, referred to as Weighing module 1, Weighing module 2 ..., Weighing module n.
Water flow standard apparatus electrical system forms as shown in Figure 6:
It mainly include industrial personal computer, PLC control system of water pump, standard scale data acquisition processing system, the acquisition of checklist data
Processing system, weighing control system.PLC control system of water pump mainly controls the invariablenes turning speed of water pump, guarantees the water of water system
Stability of flow；The correct acquisition of standard scale data collection system completion standard scale data；Checklist data collection system completes quilt
The correct acquisition of table data is examined, the data of acquisition realize the calibration and calibrating of checklist by data processing system；Weighing system
The main commutation for completing commutator, correct metering flow into the water weight and time claimed in water container, obtain accurate flow value.
One Weighing module electrical schematic diagram as shown in Figure 7, by industrial personal computer, PCI-1750, PCI-1780, PCI-1612C,
Pinboard composition.Industrial personal computer is opened and closed by PCI-1750 control valve, while receiving the status signal and optoelectronic switch letter of valve
Number, industrial personal computer stepper motor operation controlled by PCI1780 and pinboard, stepper motor drives commutator to realize water incision and cut
Claim water container out, photoelectric switching signal flows into the time t for claiming water in water container when being used to record commutator switching, and realizes and change
To device position limitation protection.Industrial personal computer realizes that electronic scale claims the data of water G to acquire by 485 communications of PCI-1612C, then weight method
Water flow be
Valve in Weighing module, optoelectronic switch, stepper motor monitoring signal concentration are made into a plug, formed a set of
Water flow Weighing module, plug are 36 core plugs, and wherein monitoring signal is 30, and 6 are spare.
In mostly set water flow device design, considers the convenience that the range of flow of water flow device is expanded, n is weighed
Module concentration is designed to a marshalling cabinet, then passes through patch for the control with other devices respectively of Weighing module in marshalling cabinet
Weighing module in cabinet is connected.
Fig. 8 is marshalling cabinet schematic diagram, Fig. 9 be 4 sets of water flow device control cabinets (DN25 control cabinet, DN50 control cabinet,
DN100 control cabinet, DN200 control cabinet) schematic diagram, 4 sets of water flow devices be according to the calibration bore and production capacity of instrument carry out
Design.8 Weighing modules are devised in marshalling cabinet, difference nominal 1,2,3,4,5,6,7,8, Weighing module unit uses
One 36 core plug can be convenient by connecting line and be connected with Weighing module in 4 sets of flow control cabinets.Marshalling cabinet and control cabinet frame
The connection type that Weighing module is only depicted in figure, does not draw other control elements, and every set control cabinet designs large, medium and small three
Weighing module respectively corresponds the larger flow, intermediate flow and smaller flow of this covering device.3 are devised on DN25 device
The connecting line that Weighing module passes sequentially through 3 band, 36 core socket is connected with the Weighing module of marshalling cabinet No. 1, No. 2 and No. 3 respectively,
Two Weighing modules are devised on DN50 device, are connected respectively with No. 4 of marshalling cabinet and No. 5 Weighing modules, in DN100 device
Two Weighing modules of upper design, are connected with No. 6 of marshalling cabinet and No. 7 Weighing modules respectively, design a weighing in DN200 device
Module is connected, it is generally the case that this connection method can satisfy 85% meter calibration with No. 8 Weighing modules of marshalling cabinet
It is required with calibrating.Sometimes user require instrument range of flow it is wider, need on device with lesser flow carry out calibration and
Small Weighing module, can be merged on this covering device run at this time, such as demarcate small flow instrument on DN200 device by calibrating
When, No. 6 in DN100 device or No. 7 Weighing modules can be connected to this covering device, in the small flow instrument of DN100 device normalization
When, No. 4 in DN50 device or No. 5 Weighing modules can be connected to this covering device, in the small flow instrument of DN50 device normalization
No. 1, No. 2 or No. 3 Weighing module in DN25 device can be connected to this covering device.
In order to reduce water flow device construction cost, accelerating design and shorten the construction time, the long-term work of device is considered
Benefit and flexibility, this patent proposes more set water flow device flexible configuration Weighing module schemes, i.e., by the key of every covering device
Part weighing system is made into modular form, and flexible configuration is into different water flow device systems, that is, in apparatus structure
On weighing system is made into independent structure, between every two covering device plus a pipeline, a valve reality is used at pipeline both ends respectively
The switching of existing Weighing module, is made into electrical Weighing module, the monitoring line of all Weighing modules for weighing system in electrical system
It is made into connection-peg form, is switched by the Weighing module that more set water flow devices are completed in plug.
The above examples are only used to illustrate the technical scheme of the present invention, rather than its limitations；Although with reference to the foregoing embodiments
Invention is explained in detail, those skilled in the art should understand that: it still can be to aforementioned each implementation
Technical solution documented by example is modified or equivalent replacement of some of the technical features；And these are modified or replace
It changes, the spirit and scope for technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution.
Claims (7)
1. a kind of weighing system for water flow device, which is characterized in that the weighing system includes Weighing module, signal collection
At module and control module；
The Weighing module has multiple, and the Weighing module is used to acquire the water flow of its corresponding water system；
The signal integration module is electrically connected with the Weighing module, and the signal integration module is equipped with and the weighing mould
The identical integrated signal interface of number of blocks；
The control module is equipped with suitable for different flow range and the control signal that matches with the integrated signal interface connects
Mouthful；
In the application weighing system, require to connect the control signaling interface of the control module and described according to range of flow
The integrated signal interface of signal integration module, so that the control module is connected to the weighing by the signal integration module
Module；
Wherein, each Weighing module include: sequentially connected water inlet switch valve, commutator, claim water container, electronic scale and
Water outlet switch valve further includes the stepper motor connecting with the commutator, and the light at the stepper motor both ends is arranged in
Electric switch；
The water inlet switch valve is used to the water in pond flowing into the commutator；
For controlling water incision or cutting out the title water container, the optoelectronic switch is used for the commutator commutator
Position carries out signal acquisition and position limitation protection, and the electronic scale is used to weigh the water weight in the title water container, the water outlet
Mouth switch valve makes water flow go back to the pond for filling the water and discharging water into the title water container；
Wherein, the control module includes: control unit and control signaling interface；
Described control unit is connected to the control signaling interface, so that described control unit is connected through the control signaling interface
The extremely integrated signal interface of the signal integration module, and send control signal to the signal integration module and obtain state letter
Number；
Wherein, described control unit includes: industrial personal computer, board and pinboard；
The industrial personal computer is connected to the control signaling interface by PCI board card, pinboard and communication card, is then attached to institute
State the integrated signal interface in signal integration module；
Wherein, start water pump, water pump is cooled down from pool water-pumping, water by water pump pipeline valve, water pump, pressure transmitter, pressure stabilizing
Container, standard scale pipeline, temperature transmitter, water inlet switch valve, commutator, claims water container, water outlet at checklist calibrating pipeline
Switch valve flows back to pond, and after waiting stability of flow, the flow value of weight method is calculated；
Wherein, industrial personal computer control stepper motor operation, stepper motor drive commutator that water is cut title water container and weigh, remember
It records water and flows into the time for claiming water container and weight, temperature-compensating operation is carried out by the temperature value that temperature transmitter acquires, is obtained
The exact flow rate value of weight method.
2. weighing system according to claim 1, which is characterized in that the signal integration module includes: that signal is integrated single
Member and integrated signal interface；
The signal integrated unit is used to integrate water inlet switch valve, water outlet switch valve, stepping electricity in the weighing unit
The electric signal of machine and optoelectronic switch, and by integrated electric signal transmission to the integrated signal interface；
The quantity of the integrated signal interface is identical as the water flow Weighing module quantity.
3. weighing system according to claim 2, which is characterized in that the signal integration module further include: marshalling cabinet；
The signal integrated unit and the integrated signal interface are arranged in the marshalling cabinet.
4. weighing system according to claim 1, which is characterized in that the control module further include: control cabinet；
Described control unit is arranged in the control cabinet；
The inside of the control cabinet is arranged in the integrated signal interface.
5. weighing system according to claim 1, which is characterized in that the integrated signal interface in the control module
Quantity be at least 3, and 3 integrated signal interfaces are respectively suitable for different range of flows.
6. weighing system according to any one of claims 1 to 5, which is characterized in that the control module has multiple and each
Control module is suitable for different range of flows.
7. weighing system according to any one of claims 1 to 3, which is characterized in that the number of the water flow Weighing module
Amount is at least 8, and every 2 Weighing modules are connected to a set of flow device system.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710035855.1A CN106768207B (en) | 2017-01-17 | 2017-01-17 | A kind of weighing system for water flow device |
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|---|---|---|---|
| CN201710035855.1A CN106768207B (en) | 2017-01-17 | 2017-01-17 | A kind of weighing system for water flow device |
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| CN106768207B true CN106768207B (en) | 2019-08-16 |
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| CN109884973A (en) * | 2019-02-28 | 2019-06-14 | 宁波明兮信息技术有限公司 | A kind of method of multi-channel control shared components |
| CN110595582A (en) * | 2019-09-04 | 2019-12-20 | 成都赫泰智能科技有限公司 | Closed electric commutator |
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| JP4113647B2 (en) * | 2000-01-31 | 2008-07-09 | トキコテクノ株式会社 | Flow meter calibration system |
| CN1952624A (en) * | 2005-10-20 | 2007-04-25 | 鞍钢股份有限公司 | Automatic verification control system for water flow standard device |
| CN201983839U (en) * | 2011-04-18 | 2011-09-21 | 张广忠 | Combined-type standard weighing container used for liquid flow standard calibrating device |
| CN102353427B (en) * | 2011-06-23 | 2014-04-02 | 温岭甬岭水表有限公司 | Detection device for metrological characteristics of water meter and detection method for using same |
| CN103411653A (en) * | 2013-08-30 | 2013-11-27 | 福建恒劲科博测控技术有限公司 | Calibration and detection device of liquid flow meter |
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