CN104677471B - A kind of networking on-line calibration system of gas turbine meter - Google Patents
A kind of networking on-line calibration system of gas turbine meter Download PDFInfo
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- CN104677471B CN104677471B CN201510054818.6A CN201510054818A CN104677471B CN 104677471 B CN104677471 B CN 104677471B CN 201510054818 A CN201510054818 A CN 201510054818A CN 104677471 B CN104677471 B CN 104677471B
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Abstract
The present invention provides a kind of networking on-line calibration system of gas turbine meter, is related to field of measuring technique.It includes remote control terminal, server, data acquisition unit, video camera and communication network, remote control terminal utilizes " differential flow " mathematical modeling that the differential pressure information of upload is converted into flow value, by standard accumulation flow value compared with the cumulative flow value of online gas turbine meter, the flowmeter error of indication is obtained；By grid platform, the calibration process to flowmeter is monitored in real time.The present invention, which solves gas turbine meter calibration censorship influence supply, on-line calibration in the prior art, to be needed to put into the technical problem of a large amount of manpower and materials.The present invention has the beneficial effect that：Network remote calibration fits like a glove with practical service environment, and calibration result is accurate.It is cost-effective to carry without split flow gauge, mobile standard device and technical staff to scene.Monitoring in real time, can provide more definite assessment to field calibration level.
Description
Technical field
The present invention relates to field of measuring technique, more particularly, to a kind of gas turbine meter networking on-line calibration system
System.
Background technology
Development and " construction of the key project such as West-east Gas, a kind of cleaning energy of natural gas conduct with gas industry
Source and important industrial chemicals, people increasingly increase to its dependency degree.The quantity that this results in natural gas metering station is rapid
Increase so that increasing gas metering instrument comes into operation.Natural gas is generally required by multiple from gas well to user
The metering of gas flowmeter, can be only achieved fair deal.Gas turbine meter is as extensive in energy measurement of natural gas instrument
The important instrument used, required precision of the people to it are also increasingly strict.For that purpose it is necessary to the gas turbine meter used is entered
Row periodic calibration.Periodic calibration only is carried out to gas turbine meter, just can guarantee that the correct of gas turbine meter indicating value
Property.Tradition is calibrated to gas turbine meter typically by two methods：One kind is to pull down gas turbine meter to send experiment
Room is calibrated, and this needs to dismount gas turbine meter, has influence on normal supply；Standard device, the function of being calibrated equipment can not
Make full use of, cause the waste of resource.Another kind is that standard device and calibration instrument are transported into scene to be calibrated.Chinese patent
Authorization Notice No. CN201772915U, authorized announcement date on March 23rd, 2011, a kind of entitled " online gas flow standard dress
Put " utility model patent, be exactly one kind therein, the device is mainly used in the accuracy of on-line checking big flow gas meter, flow meter.
It includes packaged type casing, and at least standard table being in parallel being connected with calibrating pipeline, detective tube are provided with casing
The inlet end on road is provided with the bindiny mechanism that can be connected with checklist, be provided with the pipeline before and after each standard table with it is portable
The pressure acquisition point and temperature acquisition point of formula computer system connection, connected burning is provided with the end of calibrating pipeline
Stove.This field calibration needs experienced professional's operation, extremely inefficient.Often mobile standard device, both influences standard
The uncertainty of measurement of equipment, also easily cause and unnecessary artificial damage is brought to standard device.In addition, with science and technology
Rapid development, network technology have penetrated into the every field of our daily lifes.Traditional flow measurement instrument calibrating mode
Also develop towards the direction being combined with network technology.Using network technology, networking on-line calibration gas-turbine flow is carried out
Also when the water comes, a channel is formed for meter.
The content of the invention
In order to solve in the prior art gas turbine meter calibration censorship to influence normally to supply, on-line calibration needs to throw
Enter the low technical problem of a large amount of manpower and materials efficiency, the present invention provides a kind of conveniently to the network of gas turbine meter
Change on-line calibration system, while convenient monitoring in real time, allow the gas turbine meter used persistently to keep accurate and optimal property
Energy.
The technical scheme is that：A kind of networking on-line calibration system of gas turbine meter, it includes,
Some data acquisition units, for being uploaded after collection site information processing, data acquisition unit includes：Collection is online
Differential pressure transmitter, the online gas turbine meter turbine both ends pressure difference of collection of gas turbine meter import and export differential pressure information
The flow integrator of information, the temperature transmitter and pressure transmitter for gathering air delivering pipeline temperature and pressure information；
Some video cameras, for recording online gas turbine meter using on-the-spot circumstance and gauge outfit display numerical value and
Pass information；
An at least server, for storing online gas turbine meter essential information and all previous calibration information, store number
According to collecting unit and video camera upload information；
An at least remote control terminal, uploaded for invoking server data, control data collecting unit collection information, processing
Information, generation Calibration Report, statistics and analysis offer analysis report is carried out to information；
Communication network, connection remote control terminal, data acquisition unit, video camera and server transport information.
Preferably, remote control terminal, which is provided with, is based on LabVIEW softwares, " differential pressure-flow " mathematical modeling is utilized to upload
Differential pressure information be converted into flow value, by the accumulation of the standard accumulation flow value in prover time and online gas turbine meter
Flow value compares, and obtains the error of indication of online gas turbine meter；Realize the online gas turbine meter of remote calibration.
Preferably, data acquisition unit also includes data collection station, data collection station gathers differential pressure transmitter
Analog signal change into data signal, the information of data acquisition unit collection passes through acquisition terminal upload server；Data pass
It is defeated reliable.
Preferably, communication network includes wireless network and cable network, data acquisition unit is uploaded by wireless network
Data signal, video camera pass through cable network uploaded videos signal；Using existing network, cost is reduced.
Preferably, wireless network is CDMA.
Compared with prior art, the beneficial effects of the invention are as follows：Pass through the remote on-line calibration gas-turbine flow of network
Meter, fits like a glove, calibration result is accurate with practical service environment.Gas turbine meter need not be dismounted, is set without mobile standard
It is standby, it is cost-effective without technical staff to scene, improve efficiency.Monitoring calibration process in real time, before calibration process completion,
Its result can be rechecked online, can also terminate calibration at any time, can be well while live final calibration result is obtained
It was found that the drawbacks of live produced problem in a calibration process and exposure, more definite so as to be provided to field calibration level
Assessment.Calibration result is stored in server database, and when calibrating or verifying afterwards, user can call at any time, both will not
Missing inspection, it will not also repeat to examine, moreover it is possible to retrospective analysis reason, substantially increase calibrating quality.Historical data is shared, and is gas-turbine
The maintenance of flowmeter, new type selecting provide technical support.
Brief description of the drawings
Accompanying drawing 1 is connection diagram of the present invention；
Accompanying drawing 2 is data acquisition unit connection diagram.
In figure：1- remote control terminals；2- servers；3- data acquisition lists；4- video cameras；The online gas-turbine flows of 5-
Meter；6- straight tubes；31- data collection stations；32- pressure transmitters；33- temperature transmitters；34- differential pressure transmitters；35- flows accumulate
Calculate instrument.
Embodiment
Below by embodiment, and with reference to accompanying drawing, technical scheme is described in further detail.
Embodiment 1：
As shown in figure 1, a kind of networking on-line calibration system of gas turbine meter, it includes, at least one long-range control
End 1, at least a server 2, some data acquisition units 3, some video cameras 4 and communication network processed.Data acquisition unit 3, use
Uploaded after collection site information processing.Data acquisition unit 3 is identical with the online quantity of gas turbine meter 5.Data acquisition
Single 3 yuan include：Data collection station 31, pressure transmitter 32, temperature transmitter 33, differential pressure transmitter 34 and flow integrator
35.Data collection station 31 is provided with four inputs.First input end electrically connects with pressure transmitter 32.Pressure transmitter 32 is adopted
Collect air delivering pipeline pressure data.Second input electrically connects with temperature transmitter 33.Temperature transmitter 33 gathers air delivering pipeline temperature
Degrees of data.3rd input electrically connects with differential pressure transmitter 34.Differential pressure transmitter 34 gather online gas turbine meter 5 enter,
Differential pressure information is exported, the information is analog signal.Data collection station 31 converts analog signals into data signal.4th input
End electrically connects with flow integrator 35.Flow integrator 35 is that online gas turbine meter 5 carries.Flow integrator 35 utilizes
Magneto-dependent sensor induces the angular speed arteries and veins directly proportional to fluid volume flow of turbine rotation from the signal wheel rotated coaxially
Signal is rushed, the signal is amplified, filters, enters the micro- of flow integrator 35 after shaping together with temperature, pressure transmitter signal
Processing unit carries out calculation process.Flow integrator 35 directly displays the volume flow of gas and total amount in online gas-turbine
In the LCD screen of flowmeter 5, while data collection station 31 is uploaded to, the information is data signal.Video camera 4, for being recorded in
Line gas turbine meter 5 uses on-the-spot circumstance and gauge outfit display numerical value and upload information.Every online gas-turbine flow
One video camera 4 of configuration of meter 5, is continuously shot numerical value and the work for recording that the online gauge outfit display of gas turbine meter 5 is shown
Field condition.Server 2, for storing the online essential information of gas turbine meter 5 and all previous check information, storage data are adopted
Collect unit 3 and the upload information of video camera 4.Server 2 requires to configure according to Database size.The online base of gas turbine meter 5
This information includes：Model type, manufacturer, factory number, accuracy class, range of flow, and supporting pressure transmitter, temperature
Spend the accuracy class of transmitter and differential pressure pick-up.Remote control terminal 1, it is single for the data of invoking server 2, control data collection
Member 3 gathers information, processing upload information, generates Calibration Report.The quantity of remote control terminal 1 is determined by the quantity for opening user's access end
It is fixed.Communication network, connection remote control terminal 1, data acquisition unit 3 and server 2 transmit data；Connect video camera 4 and service
The uploaded videos signal of device 2.Communication network includes wireless network (being represented by dashed line in figure) and cable network, wireless network are
CDMA.Remote control terminal 1 is by wireless network management and the data of processing server 2, and data collection station 3 is by wireless network
Data signal is passed, video camera 4 passes through cable network uploaded videos signal.
As shown in Fig. 2 figure chain lines arrow represents gas flow.Two input pickups bridging of flow integrator 35
The online turbine both ends of gas turbine meter 5.The import and export of gas turbine meter 5 is connected to straight tube 6.Pressure inverting
On the straight tube 6 that the input pickup insertion of device 32 is connected with the online import of gas turbine meter 5.The input of temperature transmitter 33
Sensor is inserted on the straight tube 6 connected with the outlet of online gas turbine meter 5.The positive pressure side of differential pressure transmitter 34 is inserted in line
The entrance point of gas turbine meter 5 connects straight tube 6, between pressure transmitter 32 and the online import of gas turbine meter 5
Close to the online entrance of gas turbine meter 5.The negative pressure end of differential pressure transmitter 34 is inserted online gas turbine meter 5 and exported
End connection straight tube 6, close to online gas-turbine flow between temperature transmitter 33 and the online outlet of gas turbine meter 5
Count 5 exits.
As illustrated in fig. 1 and 2, LabVIEW softwares are based in remote control terminal 1 and establish " Zhejiang Province's natural gas energy resource networking
The detecting system network platform ".The content of platform includes：
1) energy measurement of natural gas system management interface.The interface includes：A, the temperature of each gas metering point is gathered in real time
Degree, pressure, flow, component operational factor, and Energy Conversion is carried out according to each parameter in real time, and carry out energy accumulation.B, inquire about
Use gas situation in any stoichiometric point random time section, temperature, pressure, flow, energy curve, and can be with print record.c、
Operation to whole energy measurement of natural gas system is analyzed, and has powerful statistics and query function.D, as needed certainly
Dynamic generation daily sheet, moon sheet, year form, periodic inspection record, and can directly print out.
2) gas turbine meter real time calibration and monitoring management interface.The interface includes：A, client's log-in interface, to visitor
Family authentication.B, gas turbine meter Calibration interface, online gas turbine meter 5 is monitored in real time and is calibrated.The platform leads to
Crossing video camera 4, monitoring can pass through remote control terminal computer to the online calibration process of gas turbine meter 5, operator in real time
The camera video data for accessing the online scene of gas turbine meter 5 on server (including history video data and regard in real time
Frequency evidence), so as to whether monitor the online performance of gas turbine meter 5 and calibration operation specification, it is larger whether data on flows has
Change or saltus step, being easy to retain subsequent examination has review basis.
3) data publication interface.The interface includes：A, systematic parameter management, for parameter setting, serial port setting.B, data
Query interface, for data query printing, history report inquiry.Calibration explanation is provided c,.
4) back-stage management interface.The interface includes：A, system actor management, for setting the authority of each login user, respectively
The authority of class login user is different, so needing unified a management and distribution.B, subscriber information management, for stepping on
Land user profile is added, changed, deleting and password modification.User profile includes user name, password, user type and user
Organization etc..All types of user right system actor management definition.C, meter information management, to the instrument bag of all monitoring points
Include gas turbine meter, flow computer and supporting differential pressure transporting, temperature transmitter, the information of pressure transmitter carry out pipe
Reason, including add, change, delete.Meter information includes (having keeper's typing)：It is equipment manufacturer, specifications and models, accurate
Spend the conventional datas such as grade, infield, factory number, date.D, data base administration, DB Backup, recovery and original number
According to removing.E, data and information are issued, and regular each gas turbine meter of manual confirmation is run and calibration data.Issue briefly
Announcement information is shown to enterprise customer, the information when corresponding enterprise customer logs in.
Remote control terminal 1, which is provided with, is based on LabVIEW softwares, utilizes " differential pressure-flow " mathematical modeling to believe the pressure difference of upload
Breath is converted into flow value, by the standard accumulation flow value in prover time and the cumulative flow value of online gas turbine meter 5
Compare, obtain the error of indication of online gas turbine meter 5.
It is as follows to calibrate flow：Select online gas turbine meter 5.Start to calibrate, read online gas turbine meter 5
Data, while calculate standard accumulation flow value.Data form is formed, operating personnel choose five groups of valid data.According to database
Information, measured data and result of calculation automatically generate original record.Print and preserve.Calibration Report remotely is given, is realized by school
Quasi- instrument is not then sent through laboratory and goes to calibrate.
During calibration, remote control terminal 1 accesses " Zhejiang Province's natural gas energy resource Network Measuring System network platform ", is servicing
The selection of the lane database of device 2 needs the gas turbine meter 5 calibrated, and chooses sampling initial time and the cut-off to be extracted data
Time.
Remote control terminal 1 sends instruction and starts to detect.The calculation process of flow integrator 35 gathers online gas-turbine flow
The pulse signal of meter 5, calculate the accumulation value of prover time interior gas turbine meter 5 online.Differential pressure transmitter 34 simultaneously
Gather the differential pressure data before and after online gas turbine meter 5, gas pressure data, the temperature pick-up that pressure transmitter 32 gathers
The gas temperature data that device 33 gathers.Gathered data upload server 2 is stored in database by data collection station 31.Long-range control
Data are called at end 1 processed, according to " differential pressure-flow " mathematical modeling, calculate the cumulative flow value in the prover time of straight tube 6.
Flow integrator 35 is become by pressure by by the pulse signal of the online gas turbine meter 5 collected
Device is sent to measure pressure value Pg, temperature transmitter measures temperature value Tg, calculate online gas turbine meter 5 in prover time
Cumulant.The working condition lower volume for flowing through online gas turbine meter 5 is：
In formula：
Vb：Flow through the working condition lower volume of tested turbine flowmeter, unit m3；
N：The umber of pulse of online gas turbine meter, dimensionless；
K：The instrument coefficient of online turbine flowmeter, unit m-3；
P0、T0、Z0The absolute pressure of air, thermodynamic temperature and the compressed coefficient, i.e. P respectively under the status of criterion0=
101.325kPa、T0=293.15K, Z0=1；
Pg、Tg、ZgAbsolute pressure, thermodynamic temperature and the pressure of air at turbine flowmeter are detected respectively under working condition
Contracting coefficient, unit are respectively Pa, K, dimensionless, Z under normal pressureg=1.
The pressure loss and the flow that on line vortex flowmeters 1 differential pressure transmitter 34 measures are connected across under working condition
Between relation be：
In formula：
ΔPQmax：Under standard state, medium be dry air (20 DEG C, 101.325kPa, ρ=1.205kg/m3) when, max-flow
The pressure loss of amount, unit kPa；
ρ0：Media density under standard state (20 DEG C, 101.325kPa), units/kg/m3；
Pa：Local atmospheric pressure, unit kPa；
Pg：The absolute pressure of online gas turbine meter pressure detecting point, unit kPa；
P0：Standard atmospheric pressure (101.325kPa)；
T0：Absolute temperature (293.15K) under standard state；
Tg：Absolute temperature under the conditions of mixture condition, unit K；
Q：Operating mode flow, unit m3/h；
Qmax：Instrument maximum duty flow, unit m3/h。
Pressure value P is measured by pressure transmitter 32g, temperature transmitter 33 measures temperature value Tg, Δ PQmax、QmaxAnd ρ0By looking into
Table is drawn, you can calculates the gas operating mode theoretical delivery Q for flowing through online gas turbine meter 5, and then integrating meter calculates school
Theoretical gas integrated flux V in punctualc, in this, as normal stream value.
The error of indication of line gas turbine meter 5 is calculated by formula c：
In formula：
Vb：Tested turbine flowmeter indicating value (accumulated value) online；
Vc：Differential pressure signal processing unit calculated value (accumulated value).
Compare both flow values, draw the error of indication of online gas turbine meter 5.
Claims (4)
- A kind of 1. networking on-line calibration system of gas turbine meter, it is characterised in that：It includesSome data acquisition units（3）, for being uploaded after collection site information processing, the data acquisition unit（3）Including：Adopt Collect online gas turbine meter（5）The differential pressure transmitter of import and export differential pressure information（34）, the online gas turbine meter of collection （5）The flow integrator of turbine both ends differential pressure information（35）, collection air delivering pipeline temperature and pressure information temperature transmitter （33）And pressure transmitter（32）；Some video cameras（4）, for recording online gas turbine meter（5）Using on-the-spot circumstance and gauge outfit display numerical value simultaneously Upload information；An at least server（2）, for storing online gas turbine meter（5）Essential information and all previous calibration information, storage Data acquisition unit（3）And video camera（4）Upload information；An at least remote control terminal（1）, for invoking server（2）Data, control data collecting unit（3）Gather information, place Manage upload information, generation Calibration Report, statistics and analysis offer analysis report is provided to information；Communication network, connect remote control terminal（1）, data acquisition unit（3）, video camera（4）With server（2）Transmit information；The remote control terminal（1）Provided with based on LabVIEW softwares, utilize " differential pressure-flow " mathematical modeling to upload differential pressure and become Send device（34）, temperature transmitter（33）And pressure transmitter（32）Signal of change goes out online gas turbine meter（5）Manage at place The gas operating mode theoretical delivery value on road, and then integrating meter calculates the Theoretical gas integrated flux in prover time, in this, as mark Quasi- flow value judges online gas turbine meter（5）Error.
- A kind of 2. networking on-line calibration system of gas turbine meter according to claim 1, it is characterised in that：Institute State data acquisition unit（3）Also include data collection station（31）, data collection station（31）By differential pressure transmitter（34）Collection Analog signal change into data signal, data acquisition unit（3）The information of collection passes through acquisition terminal（31）Upload server （2）.
- A kind of 3. networking on-line calibration system of gas turbine meter according to claim 1, it is characterised in that：Institute Stating communication network includes wireless network and cable network, data acquisition unit（3）Pass through wireless network upload digital signal, shooting Machine（4）Pass through cable network uploaded videos signal.
- A kind of 4. networking on-line calibration system of gas turbine meter according to claim 3, it is characterised in that：Institute It is CDMA to state wireless network.
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