CN107764375A - Gas meter, flow meter error of indication calibrating installation - Google Patents
Gas meter, flow meter error of indication calibrating installation Download PDFInfo
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- CN107764375A CN107764375A CN201711283066.6A CN201711283066A CN107764375A CN 107764375 A CN107764375 A CN 107764375A CN 201711283066 A CN201711283066 A CN 201711283066A CN 107764375 A CN107764375 A CN 107764375A
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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
- G01F25/15—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume of flowmeters specially adapted for gas meters
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- General Physics & Mathematics (AREA)
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Abstract
The invention provides a kind of gas meter, flow meter error of indication calibrating installation, it is related to intelligent meter field.The gas meter, flow meter error of indication calibrating installation, by detecting the actual volume by gas, target induction installation is recycled to generate pulse signal when detecting target induction installation, then using controller according to the number for receiving pulse signal, presetting revolution volume, the outflow point error of indication is calculated by the actual volume of gas, so as to save the calibrating time, improve calibrating accuracy and calibrating sensitivity, and reduce energy resource consumption, realize energy-saving and emission-reduction, the detecting gas meter technology of enterprise itself can also be improved, adapt to the economic situation of Industry Quick Development, improve the competitiveness of enterprise itself.
Description
Technical field
The present invention relates to intelligent meter field, in particular to a kind of gas meter, flow meter error of indication calibrating installation.
Background technology
The daily fuel cooked of people turns from the serious waste of resources such as firewood, coal, with serious pollution conventional energy resource
It is changed into using natural gas and coal gas.Can only see outside gas meter, flow meter has a roller with number in small windowpane, on roller
There are seven bit digitals, four black before decimal point, rear three red can accumulative air volume automatically so that those use natural
Other of gas or piped gas, easily can know how much gas used, so as to can according to monthly consume combustion gas cubic meter number
Payment.And the error of indication of gas meter, flow meter refer to the difference of volume that gas meter, flow meter shows and the actual volume for passing through gas meter, flow meter with it is actual logical
The percentage of the volume of gas meter, flow meter is crossed, is an important indicator for evaluating gas meter, flow meter product quality.
In the prior art, gas consumption is measured usually using diaphragm gas meter, diaphragm gas meter be using positive displacement as
The utensil that principle is measured, once being molded, it turns round volume and just had determined that product.The batching cycle of core of membrane type gas meter is
The diaphragm for doing reciprocating using two panels is transported as power by the at the uniform velocity revolution of double rocking lever single crank mechanism urges distributing valve bonnet
It is dynamic and realization, when the mechanism completes rev, the air inlet and exhaust of a revolution volume are just completed, with natural gas
The continuous rising of usage amount, and Large Infrastructure Projects are gradually improved, and gas meter, flow meter market represents in rapid expansion, current gas
The deficiency of value error testing also gradually highlights, and the especially calibrating of minimum discharge point, time-consuming, and accuracy is not high, calibrating efficiency
It is low, govern the production efficiency of gas meter, flow meter.Therefore it is existing mainly to ask that it is low, which to take long and accuracy, for error of indication calibrating
Topic, the accuracy and efficiency of calibrating have much room for improvement.
The content of the invention
In view of this, it is above-mentioned to improve it is an object of the invention to provide a kind of gas meter, flow meter error of indication calibrating installation
Problem.
The invention provides a kind of gas meter, flow meter error of indication calibrating installation, the gas meter, flow meter error of indication calibrating installation includes
Rotating disc, the first target, actual volume calibrating installation, first object induction installation and controller to be detected, described first treats
Detection target is arranged in the rotating disc, and the rotating disc is used to drive the described first target rotation to be detected, first mesh
Mark induction installation, the actual volume calibrating installation are electrically connected with the controller respectively, and the actual volume calibrating installation is used
Actual volume in detection by gas, the first object induction installation are used for when detecting first target to be detected
Generate the first pulse signal, and by the first pulse signal transmission to the controller, the controller is used for according to receiving the
The number of one pulse signal, presetting revolution volume, the big-and-middle flow point error of indication calculated by the actual volume of gas.
Further, whether the controller is additionally operable to judge the big-and-middle flow point error of indication in presetting first threshold
In the range of, if it is, generation assay approval result, if it is not, then unqualified result is examined and determine in generation.
Further, the described first target to be detected is magnet, and the first object induction installation is magnetic strength element.
Further, the described first target to be detected is reflection cursor, and the first object induction installation is photoelectric sensing
Device.
Further, the gas meter, flow meter error of indication calibrating installation also includes the multiple second targets to be detected and the second target
Induction installation, first target to be detected are located on the circumference of the first radius of the rotating disc, and multiple described second is to be checked
Target spaced set is surveyed on the circumference of the second radius of the rotating disc, and the first radius is more than the second radius, described the
Two target induction installations are arranged at intervals with the first object induction installation, the second target induction installation and the controller
Electrical connection, the second target induction installation are used to generate the second pulse letter when detecting second target to be detected
Number, and the second pulse signal transmission to the controller, the controller are used for the number according to the described second target to be detected
Amount, revolution volume preset value, the number calculating gas meter, flow meter indicating value for receiving the first pulse signal, according to the described second mesh to be detected
Target quantity, movement revolution volume actual value, receive the real gas that the number calculating of the second pulse signal passes through gas meter, flow meter
Volume, then calculate the lower-capacity point error of indication according to gas meter, flow meter indicating value, by the real gas volume of gas meter, flow meter.
Further, the described second target to be detected is magnet, and the second target induction installation is magnetic strength element.
Further, the described second target to be detected is reflection cursor, and the second target induction installation is photoelectric sensing
Device.
Further, whether the controller is additionally operable to judge the lower-capacity point error of indication in presetting Second Threshold model
In enclosing, if it is, generation assay approval result, if it is not, then unqualified result is examined and determine in generation.
Further, the gas meter, flow meter error of indication calibrating installation also includes switching switch, the first object sensing dress
Put, it is described switching switch and the controller be sequentially connected electrically, the second target induction installation, it is described switching switch and
The controller is sequentially connected electrically, and whether the frequency that the controller is additionally operable to judge to receive the first pulse signal is less than default
Fixed frequency, if the frequency for receiving the first pulse signal is less than predetermined frequency value, control it is described switching switch with it is described
Second target induction installation turns on.
Further, the gas meter, flow meter error of indication calibrating installation also includes register, the register and the control
Device electrically connects.
Compared with prior art, gas meter, flow meter error of indication calibrating installation provided by the invention, by detecting by gas
Actual volume, first object induction installation is recycled to generate the first pulse signal when detecting first object induction installation, so
Afterwards using controller according to number, presetting revolution volume, the actual volume by gas for receiving the first pulse signal
The big-and-middle flow point error of indication is calculated, so as to saving the calibrating time, improving calibrating accuracy and examining and determine sensitivity, and
Reduce energy resource consumption, realize energy-saving and emission-reduction, additionally it is possible to improve the detecting gas meter technology of enterprise itself, adapt to industry and quickly send out
The economic situation of exhibition, improve the competitiveness of enterprise itself.
To enable the above objects, features and advantages of the present invention to become apparent, preferred embodiment cited below particularly, and coordinate
Appended accompanying drawing, is described in detail below.
Brief description of the drawings
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, the reality of the invention to providing in the accompanying drawings below
The detailed description for applying example is not intended to limit the scope of claimed invention, but is merely representative of the selected implementation of the present invention
Example.Based on the embodiment in the present invention, what those of ordinary skill in the art were obtained under the premise of creative work is not made
Every other embodiment, belongs to the scope of protection of the invention.
Fig. 1 is that the circuit of gas meter, flow meter error of indication calibrating installation provided in an embodiment of the present invention connects block diagram；
Fig. 2 is the structural representation of rotating disc provided in an embodiment of the present invention.
Icon：101- first object induction installations；102- the second target induction installations；103- switching switches；104- first
Target to be detected；The second targets to be detected of 105-；106- controllers；107- actual volume calibrating installations；108- registers；109-
Rotating disc.
Embodiment
Below in conjunction with accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Ground describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.Generally exist
The component of the embodiment of the present invention described and illustrated in accompanying drawing can be configured to arrange and design with a variety of herein.Cause
This, the detailed description of the embodiments of the invention to providing in the accompanying drawings is not intended to limit claimed invention below
Scope, but it is merely representative of the selected embodiment of the present invention.Based on embodiments of the invention, those skilled in the art are not doing
The every other embodiment obtained on the premise of going out creative work, belongs to the scope of protection of the invention.
Fig. 1, Fig. 2 are referred to, the embodiments of the invention provide a kind of gas meter, flow meter error of indication calibrating installation, gas meter, flow meter indicating value
Error verification device includes rotating disc 109, the first target 104 to be detected, actual volume calibrating installation 107, first object sensing
Device 101 and controller 106.As shown in figure 1, the first target 104 to be detected is arranged in rotating disc 109, in the present embodiment,
When needing to detect the big-and-middle flow point error of indication, the first target 104 to be detected is preferably disposed on the edge of rotating disc 109, and
The quantity of one target 104 to be detected can be one or more, be 1 in the present embodiment, the rotation of rotating disc 109 one week, first
Target induction installation 101 generates first pulse signal.Rotating disc 109 can be circular or annular even regular polygon,
It is not limited herein.Rotating disc 109 is used to drive the first target 104 to be detected to rotate, as shown in Fig. 2 first object sensing dress
101, actual volume calibrating installation 107 is put to electrically connect with controller 106 respectively.
Actual volume calibrating installation 107 is used to detect the actual volume by gas, and first object induction installation 101 is used for
Generate the first pulse signal when detecting the first target 104 to be detected, and by the first pulse signal transmission to controller 106,
Controller 106 is used for according to number, presetting revolution volume, the actual volume by gas for receiving the first pulse signal
Calculate the big-and-middle flow point error of indication.
Specifically, controller 106 is used for according to formula
The big-and-middle flow point error of indication is calculated, whereinVcRepresent movement revolution volume actual value, VrTable
Show the actual volume by gas, n represents the number for the first pulse signal that first object induction installation 101 collects, ViTable
Show presetting gas meter, flow meter revolution volume preset value, Vm=nVi, VmRepresent the indicating value volume of gas meter, flow meter, E1Big-and-middle flow point indicating value
Error.
Controller 106 is additionally operable to judge the big-and-middle flow point error of indication whether in the range of presetting first threshold, such as
Fruit is then to generate assay approval result, if it is not, then unqualified result is examined and determine in generation.In the present embodiment, presetting first
Threshold range can be -1.5%≤E1≤ 1.5%, if the big-and-middle flow point error of indication is in -1.5%≤E1≤ 1.5% section,
Big-and-middle flow point error of indication assay approval is then thought, conversely, then examining and determine unqualified.
In the present embodiment, the first target 104 to be detected can use magnet, and first object induction installation 101 can use
Magnetic strength element, or the first target 104 to be detected can also use reflection cursor, and first object induction installation 101 can also be adopted
Use photoelectric sensor.
Gas meter, flow meter error of indication calibrating installation also includes the multiple second target induction installations of target 105 and second to be detected
102, on the circumference for the first radius that the first target 104 to be detected is located at rotating disc 109, multiple second targets 105 to be detected etc.
Spacing is arranged on the circumference of the second radius of rotating disc 109, and the first radius is more than the second radius, the second target induction installation
102 are arranged at intervals with first object induction installation 101.Second target induction installation 102 electrically connects with controller 106, the second mesh
Mark induction installation 102 is used to generate the second pulse signal when detecting second target 105 to be detected, and by the second pulse
Signal is transmitted to controller 106.
Controller 106 is additionally operable to the quantity according to the second target 105 to be detected, revolution volume preset value, receives first
The number of pulse signal calculates gas meter, flow meter indicating value, quantity, movement revolution volume actual value according to the second target 105 to be detected,
The number for receiving the second pulse signal is calculated by the real gas volume of gas meter, flow meter, then according to gas meter, flow meter indicating value, pass through combustion
The real gas volume of gas meter calculates the lower-capacity point error of indication.
Specifically, controller 106 is used for according to formulaGas meter, flow meter indicating value is calculated, according to formulaCalculating passes through
The real gas volume of gas meter, flow meter, according to formulaThe lower-capacity point error of indication is calculated,
Wherein, n is that controller 106 receives pulse number, and m is the quantity of the second target 105 to be detected, E2Missed for lower-capacity point indicating value
Difference, VcRepresent movement revolution volume actual value, ViRepresent presetting gas meter, flow meter revolution volume preset value.
Controller 106 is additionally operable to judge the lower-capacity point error of indication whether in the range of presetting Second Threshold, if
It is then to generate assay approval result, if it is not, then unqualified result is examined and determine in generation.In the present embodiment, presetting Second Threshold
It may range from -3%≤E2≤ 3%, if the big-and-middle flow point error of indication is in -3%≤E2≤ 3% section, then it is assumed that low discharge
Point error of indication assay approval.
In the present embodiment, the second target 105 to be detected can use magnet, and the second target induction installation 102 can use
Magnetic strength element, or the second target 105 to be detected can also use reflection cursor, and the second target induction installation 102 can also be adopted
Use photoelectric sensor.
Gas meter, flow meter error of indication calibrating installation also includes switching switch 103, first object induction installation 101, switching switch
103 and controller 106 be sequentially connected electrically, the second target induction installation 102, switching switch 103 and controller 106 it is electric successively
Connection, whether the frequency that controller 106 is additionally operable to judge to receive the first pulse signal is less than presetting frequency, if receiving
When the frequency of first pulse signal is less than predetermined frequency value, control switching switch 103 is led with the second target induction installation 102
It is logical.If the frequency for receiving the first pulse signal illustrates that the rotating speed of now rotating disc 109 is slower when being less than predetermined frequency value, can
To be detected to the lower-capacity point error of indication, if the frequency for receiving the first pulse signal is more than predetermined frequency value, say
The rotating speed of bright now rotating disc 109 is very fast, then switching switch 103 maintains to turn on the second target induction installation 102.
Gas meter, flow meter error of indication calibrating installation also includes register 108, and register 108 electrically connects with controller 106.Deposit
Device 108 can be used for storing parameter and verification result.
In summary, gas meter, flow meter error of indication calibrating installation provided by the invention, by detecting the actual body by gas
Product, recycle first object induction installation to generate the first pulse signal when detecting first object induction installation, then utilize
Controller is according to receiving the number of the first pulse signal, presetting revolution volume, calculated by the actual volume of gas
The big-and-middle flow point error of indication, or the second target to be detected is detected using the second target induction installation, and detecting one
Generate the second pulse signal during the second target induction installation, and by the second pulse signal transmission to controller；Recycle controller
The quantity of the second target to be detected of foundation, revolution volume preset value, the number calculating combustion gas expression for receiving the second pulse signal
Value；Then turn round volume actual value using the quantity of controller the second target to be detected of foundation, movement, receive the second pulse letter
Number number calculate by the real gas volume of gas meter, flow meter；Finally using controller according to gas meter, flow meter indicating value, pass through gas meter, flow meter
Real gas volume calculate the lower-capacity point error of indication, so as to save the calibrating time, improve calibrating accuracy and inspection
Determine sensitivity, and reduce energy resource consumption, realize energy-saving and emission-reduction, additionally it is possible to improve the detecting gas meter technology of enterprise itself, fit
The economic situation of Industry Quick Development is answered, improves the competitiveness of enterprise itself.
In several embodiments provided herein, it should be understood that disclosed apparatus and method, can also pass through
Other modes are realized.Device embodiment described above is only schematical, for example, flow chart and block diagram in accompanying drawing
Show the device of multiple embodiments according to the present invention, method and computer program product architectural framework in the cards,
Function and operation.At this point, each square frame in flow chart or block diagram can represent the one of a module, program segment or code
Part, a part for the module, program segment or code include one or more and are used to realize holding for defined logic function
Row instruction.It should also be noted that at some as in the implementation replaced, the function that is marked in square frame can also with different from
The order marked in accompanying drawing occurs.For example, two continuous square frames can essentially perform substantially in parallel, they are sometimes
It can perform in the opposite order, this is depending on involved function.It is it is also noted that every in block diagram and/or flow chart
The combination of individual square frame and block diagram and/or the square frame in flow chart, function or the special base of action as defined in performing can be used
Realize, or can be realized with the combination of specialized hardware and computer instruction in the system of hardware.
In addition, each functional module in each embodiment of the present invention can integrate to form an independent portion
Point or modules individualism, can also two or more modules be integrated to form an independent part.
If the function is realized in the form of software function module and is used as independent production marketing or in use, can be with
It is stored in a computer read/write memory medium.Based on such understanding, technical scheme is substantially in other words
The part to be contributed to prior art or the part of the technical scheme can be embodied in the form of software product, the meter
Calculation machine software product is stored in a storage medium, including some instructions are causing a computer equipment (can be
People's computer, server, or network equipment etc.) perform all or part of step of each embodiment methods described of the present invention.
And foregoing storage medium includes：USB flash disk, mobile hard disk, read-only storage (ROM, Read-Only Memory), arbitrary access are deposited
Reservoir (RAM, Random Access Memory), magnetic disc or CD etc. are various can be with the medium of store program codes.Need
Illustrate, herein, such as first and second or the like relational terms be used merely to by an entity or operation with
Another entity or operation make a distinction, and not necessarily require or imply between these entities or operation any this reality be present
The relation or order on border.Moreover, term " comprising ", "comprising" or its any other variant are intended to the bag of nonexcludability
Contain, so that process, method, article or equipment including a series of elements not only include those key elements, but also including
The other element being not expressly set out, or also include for this process, method, article or the intrinsic key element of equipment.
In the absence of more restrictions, the key element limited by sentence "including a ...", it is not excluded that including the key element
Process, method, other identical element also be present in article or equipment.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should be included in the scope of the protection.It should be noted that：Similar label and letter exists
Similar terms is represented in following accompanying drawing, therefore, once being defined in a certain Xiang Yi accompanying drawing, is then not required in subsequent accompanying drawing
It is further defined and explained.
The foregoing is only a specific embodiment of the invention, but protection scope of the present invention is not limited thereto, any
Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, should all be contained
Cover within protection scope of the present invention.Therefore, protection scope of the present invention described should be defined by scope of the claims.
It should be noted that herein, such as first and second or the like relational terms are used merely to a reality
Body or operation make a distinction with another entity or operation, and not necessarily require or imply and deposited between these entities or operation
In any this actual relation or order.Moreover, term " comprising ", "comprising" or its any other variant are intended to
Nonexcludability includes, so that process, method, article or equipment including a series of elements not only will including those
Element, but also the other element including being not expressly set out, or it is this process, method, article or equipment also to include
Intrinsic key element.In the absence of more restrictions, the key element limited by sentence "including a ...", it is not excluded that
Other identical element also be present in process, method, article or equipment including the key element.
Claims (10)
1. a kind of gas meter, flow meter error of indication calibrating installation, it is characterised in that the gas meter, flow meter error of indication calibrating installation includes turning
Moving plate, the first target, actual volume calibrating installation, first object induction installation and controller to be detected, described first is to be checked
Survey target and be arranged in the rotating disc, the rotating disc is used to drive the described first target rotation to be detected, the first object
Induction installation, the actual volume calibrating installation electrically connect with the controller respectively, and the actual volume calibrating installation is used for
Detection is by the actual volume of gas, and the first object induction installation when detecting first target to be detected for giving birth to
Into the first pulse signal, and by the first pulse signal transmission to the controller, the controller is used for foundation and receives first
The number of pulse signal, presetting revolution volume, the big-and-middle flow point error of indication calculated by the actual volume of gas.
2. gas meter, flow meter error of indication calibrating installation according to claim 1, it is characterised in that the controller is additionally operable to sentence
Whether the big-and-middle flow point error of indication of breaking is in the range of presetting first threshold, if it is, generation assay approval result, such as
Fruit is no, then unqualified result is examined and determine in generation.
3. gas meter, flow meter error of indication calibrating installation according to claim 1, it is characterised in that first target to be detected
For magnet, the first object induction installation is magnetic strength element.
4. gas meter, flow meter error of indication calibrating installation according to claim 1, it is characterised in that first target to be detected
To reflect cursor, the first object induction installation is photoelectric sensor.
5. gas meter, flow meter error of indication calibrating installation according to claim 1, it is characterised in that the gas meter, flow meter error of indication
Calibrating installation also includes the multiple second targets to be detected and the second target induction installation, and first target to be detected is positioned at described
On the circumference of first radius of rotating disc, multiple second target spaced sets to be detected in the rotating disc the second half
On the circumference in footpath, and the first radius is more than the second radius, the second target induction installation and the first object induction installation
It is arranged at intervals, the second target induction installation electrically connects with the controller, and the second target induction installation is used to examine
Generate the second pulse signal when measuring second target to be detected, and by the second pulse signal transmission to the control
Device, the controller are used for the quantity according to the described second target to be detected, revolution volume preset value, receive the first pulse letter
Number number calculate gas meter, flow meter indicating value, quantity according to the described second target to be detected, movement revolution volume actual value, receive
The number of second pulse signal calculates the real gas volume by gas meter, flow meter, then according to gas meter, flow meter indicating value, pass through gas meter, flow meter
Real gas volume calculates the lower-capacity point error of indication.
6. gas meter, flow meter error of indication calibrating installation according to claim 5, it is characterised in that second target to be detected
For magnet, the second target induction installation is magnetic strength element.
7. gas meter, flow meter error of indication calibrating installation according to claim 5, it is characterised in that second target to be detected
To reflect cursor, the second target induction installation is photoelectric sensor.
8. gas meter, flow meter error of indication calibrating installation according to claim 5, it is characterised in that the controller is additionally operable to sentence
Whether the disconnected lower-capacity point error of indication is in the range of presetting Second Threshold, if it is, generation assay approval result, if
No, then unqualified result is examined and determine in generation.
9. gas meter, flow meter error of indication calibrating installation according to claim 5, it is characterised in that the gas meter, flow meter error of indication
Calibrating installation also includes switching switch, and the first object induction installation, the switching switch and the controller are electric successively
Connection, the second target induction installation, the switching switch and the controller are sequentially connected electrically, and the controller is also used
Whether it is less than presetting frequency in the frequency for judging to receive the first pulse signal, if receiving the frequency of the first pulse signal
During less than predetermined frequency value, the switching switch is controlled to be turned on the second target induction installation.
10. gas meter, flow meter error of indication calibrating installation according to claim 1, it is characterised in that the gas meter, flow meter indicating value is missed
Poor calibrating installation also includes register, and the register electrically connects with the controller.
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| CN201711283066.6A CN107764375B (en) | 2017-12-07 | 2017-12-07 | Gas meter indication error calibrating device |
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| CN201711283066.6A CN107764375B (en) | 2017-12-07 | 2017-12-07 | Gas meter indication error calibrating device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109141774A (en) * | 2018-08-15 | 2019-01-04 | 威海拙诚燃气安全设备有限公司 | One kind realizing gas safe management method by registering gas equipment to gas meter, flow meter |
| CN114001787A (en) * | 2020-07-17 | 2022-02-01 | 成都秦川物联网科技股份有限公司 | Double-speed photoelectric sampling method for Internet of things intelligent gas meter |
| CN114018355A (en) * | 2020-07-17 | 2022-02-08 | 成都秦川物联网科技股份有限公司 | Double-speed photoelectric sampling device for intelligent gas meter based on Internet of things |
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| CN114001787B (en) * | 2020-07-17 | 2023-05-05 | 成都秦川物联网科技股份有限公司 | Dual-speed photoelectric sampling method for intelligent gas meter of Internet of things |
| CN114018355B (en) * | 2020-07-17 | 2023-05-09 | 成都秦川物联网科技股份有限公司 | Internet of things intelligent gas meter double-speed photoelectric sampling device |
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