The content of the invention
An object of the present invention is that there is provided a kind of IC-card intelligent quality flow gas table and its pipe for above-mentioned deficiency
Reason system, reload temperature volume correction larger with the metering base table error for expecting to solve volumetric metering principle in the prior art
Device increases production cost, and the base table of ultrasonic wave principle metering is not suitable for the technical problems such as mixing source of the gas.
To solve above-mentioned technical problem, the present invention uses following technical scheme:
One aspect of the present invention provides a kind of IC-card intelligent quality flow gas table, and described gas meter, flow meter includes micro computer controlled
Device processed, micro electronmechanical metering units, valve control circuit and IC-card read/write circuit, the micro electronmechanical metering units pass sequentially through signal acquisition
Unit, signal processing unit access microcomputer controller, for by signal processing unit by digital quality information transfer to micro- electricity
Brain controller;The microcomputer controller is connected by valve control circuit with electromechanical valve, the open and close for controlling electromechanical valve;
The microcomputer controller is also connected with IC-card read/write circuit, for by IC-card read/write circuit by the data information transfer of IC-card
To microcomputer controller, microcomputer controller is carried out data transmission by IC-card with gas intelligent management system;At the signal
Managing at least includes mass flow processing module in unit, the mass flow processing module is respectively connected to memory module and micro computer
Controller, for by mass flow processing module based on the mass flow calculation formula stored in memory module, by signal acquisition
The digital temperature signal that unit is collected is converted into digital quality information;Described memory module also accesses microcomputer controller,
For being repaiied by microcomputer controller to the coefficient of heat conduction in mass flow calculation formula, instrument constant, specific heat at constant pressure
Just.
Preferably, further technical scheme is:Described gas meter, flow meter also includes temperature sensor C, and the temperature is passed
Sensor C access microcomputer controller, for by temperature sensor C detect ambient temperature, and by current temperature value transmit to
Microcomputer controller.
Further technical scheme is:The mass flow processing module is additionally operable to according to environment temperature and every time
The error curve of the parameter of sampling is corrected to the temperature difference in formula;The mass flow processing module and signal acquisition list
Analog signal amplification module and A/D analog-to-digital conversion modules are additionally provided between member;The microcomputer controller is built-in with amendment control
Table, is repaiied by the correction chart to the coefficient of heat conduction in mass flow calculation formula, instrument constant, specific heat at constant pressure
Just.
Further technical scheme is:The microcomputer controller is also accessed to be deposited in memory cell, the memory cell
Preset tolerance value is contained, for being carried out by microcomputer controller according to digital quality information to the preset tolerance value in memory cell
Deduct, when preset tolerance value is 0, electromechanical valve is closed by valve control circuit by microcomputer controller.
Further technical scheme is:Described gas meter, flow meter also includes under-voltage protecting circuit, power-off protecting circuit, high electricity
Voltage protection circuit and flow current foldback circuit, under-voltage protecting circuit, power-off protecting circuit, high voltage protection circuit and flow mistake
Stream protection circuit is connected with microcomputer controller respectively, for there is work during IC-card intelligent quality flow gas table use
When making line under-voltage, power cut-off or change battery, occurring high voltage, gas flow and be continued above the situation of target flow, by
Microcomputer controller completes to close the operation of valve by valve control circuit to electromechanical valve.
Further technical scheme is:Described gas meter, flow meter also includes acceleration transducer, for by acceleration sensing
Device detects environmental vibration, when occurring earthquake, by the information transmission detected to microcomputer controller, is led to by microcomputer controller
Cross valve control circuit and close electromechanical valve.
Further technical scheme is:Described gas meter, flow meter also includes power sense circuit, power sense circuit one end
It is connected with the power supply circuit being powered for each module of gas meter, flow meter, the other end is connected with microcomputer controller, for detecting power supply
Cell voltage and the time apart from predicted life, and by power source life information transfer to microcomputer controller;Described gas meter, flow meter
Also include display and alarm, display and alarm are connected on microcomputer controller, the display is based on showing
Information, control information and management information are measured, the metrical information includes the information, control such as gas instantaneous delivery, accumulative gas flow
Information processed includes the information such as valve control information, and management information includes the information such as valve state information, charging information;The alarm is used
In the alarm operation for completing gas meter, flow meter table end.
Further technical scheme is:The gas meter, flow meter include be tightly connected respectively with electric resistance welding joint air inlet pipe,
Escape pipe and display, the display are arranged on the outside of gas meter, flow meter, and electromechanical valve is provided with air inlet pipe;The gas meter, flow meter
Inside is also equipped with the current divider being connected with gas meter, flow meter internal cavity, and the inside of the current divider is additionally provided with multiple air-flow straight lines
Pipeline, the inlet end of the current divider is additionally provided with radome fairing, and an air-flow rectilinear duct of the splitter overhead is used as measurement
Micro electronmechanical metering units are installed in runner, the measurement runner;The micro electronmechanical metering units include temperature sensor A, temperature
Sensor B and micro-heater are spent, the temperature sensor A, temperature sensor B and micro-heater are installed in the measurement runner
Near middle, the signal of the temperature sensor A and temperature sensor B signal output part respectively with signal gathering unit adopts
Collect end to be connected.
Further technical scheme is:The outlet side of the escape pipe is also equipped with anti-backflow device, for working as combustion gas
When there is adverse current, anti-backflow device closes escape pipe under self gravitation and counter-current gas pressure collective effect.
Another aspect of the present invention additionally provides a kind of IC-card intelligent quality flow gas list management system, described system bag
Include above-mentioned IC-card intelligent quality flow gas table and gas intelligent management system, the multiple IC-card intelligent quality flow gas
Table accesses gas intelligent management system, for passing through IC-card and IC-card intelligent quality flow gas by gas intelligent management system
Carry out data transmission between table;The gas intelligent management system includes:Service management module, for realize open an account, hair fastener,
Payment, move back expense, change table, transfer, cancellation meter reading and blacklist management;Basic data module, for realizing that website is set, region is set
Put, table type is set, payment type is set, manufacturer is set;IC-card management module, makees for implementation tool blocking, mends card
With IC-card reparation;Statement management module, for realizing user basic information Report Server Management, the management of subscriber payment information report, using
Mend card information Report Server Management, daily sheet management, moon sheet management, year Report Server Management in family;System setup module:For realizing management
Member's setting, menu setting, password setting, invoice format setting, serial port setting.
Compared with prior art, part of the invention has the beneficial effect that:
(1) mass flow metering principle, no mechanical transmission component are used, it is to avoid the measurement problem that mechanical aging is brought,
It ensure that measuring accuracy.
(2) temperature adjustmemt function is reached with mass flow metering, temperature and pressure compensation is carried out without external correcting device,
Whole table small volume, measuring accuracy is high, highly reliable.
(3) integral structure is used, it is to avoid install matching problem caused by attachment device additional, it is ensured that metering accuracy, and
Reduce production cost.
(4) protection circuits such as under-voltage, power-off, high voltage are provided with, it is ensured that with gas safety.
(5) anti-backflow device is housed on escape pipe, can when gas meter is anti-loaded anti-gas reverse flow, or prevented when stopping the supple of gas or steam
Negative pressure is mixed into air.
(6) sprue inlet end is equipped with radome fairing, and sprue is built with current divider, it is ensured that combustion gas is uniformly flowed in pipeline
It is dynamic, improve measuring accuracy.
(7) air inlet pipe is provided separately with escape pipe, even if being used for a long time, the impurity being mixed into combustion gas can also be deposited in watchcase
Downside, is prevented effectively from impurity and is piled up in pipeline, it is ensured that gas metering accuracy.
Embodiment
The present invention is further elaborated below in conjunction with the accompanying drawings.
With reference to shown in Fig. 1, one embodiment of the present of invention is a kind of IC-card intelligent quality flow gas table, the gas meter, flow meter bag
Include microcomputer controller, micro electronmechanical metering units, valve control circuit and IC-card read/write circuit;As shown, it is foregoing
Micro electronmechanical metering units pass sequentially through signal gathering unit, signal processing unit access microcomputer controller, for by signal
Unit is managed by digital quality information transfer to microcomputer controller;Wherein microcomputer controller passes through valve control circuit and electromechanical valve phase
Even, the open and close for controlling electromechanical valve;Foregoing microcomputer controller is also connected with IC-card read/write circuit, for by IC
Card read/write circuit (the IC-card seat that can be accessed by it) is by the data information transfer of IC-card to microcomputer controller, and micro computer is controlled
Device is carried out data transmission by IC-card with gas intelligent management system;Gas intelligent management system can be write data by card reader
Entering technological means even more important in IC-card, the present embodiment is:
At least need to include mass flow processing module with reference to shown in Fig. 2, in above-mentioned signal processing unit, at the mass flow
Reason module is respectively connected to memory module and above-mentioned microcomputer controller, for being based on memory module by mass flow processing module
The mass flow calculation formula of middle storage, digital quality information is converted into by the temperature signal that signal gathering unit is collected;Together
When, inventor ensures the accuracy of digital quality information, improves the accuracy that gas meter, flow meter carries out mass flow metering, will also be upper
State memory module access microcomputer controller, for by microcomputer controller to the heat transfer system in mass flow calculation formula
Number, instrument constant, specific heat at constant pressure are modified.
Above-mentioned microcomputer controller built-in can correct the table of comparisons, by the correction chart in mass flow calculation formula
The coefficient of heat conduction, instrument constant, specific heat at constant pressure are modified.
Mass flow processing module can be stored in the information such as continuous data to memory module, and can take out each from memory module
Parameter preset is planted, the parameter preset includes algorithm and coefficient required during mass flow processing module computing, such as mass flow
Calculation formula, combustion gas conversion coefficient, temperature etc..
In the present embodiment, mass flow calculation formula mentioned above is as follows:
In above formula, Δ T is the temperature difference, and K is instrument constant, and A is heater and the coefficient of heat conduction of surrounding environment heat exchange, Cp
To be tested the specific heat at constant pressure of gas, the heat of Q upstream toward downstreams conduction;
With reference to shown in Fig. 4, in another embodiment of the invention, inventor has done further to the structure of above-mentioned gas meter, flow meter
Optimal design-aside, be specially the gas meter, flow meter include be tightly connected respectively with electric resistance welding joint 1 air inlet pipe 16, escape pipe 10 and
Display 11, display 11 is arranged on the outside of gas meter, flow meter, and is provided with air inlet pipe 16 electromechanical valve 4;Wherein gas meter, flow meter
Inside is also equipped with the current divider 6 being connected with gas meter, flow meter internal cavity, and the inside of the current divider 6 is additionally provided with multiple air-flow straight lines
Pipeline, and radome fairing 5 is set up in the inlet end of current divider 6, and it regard an air-flow rectilinear duct at the top of current divider 6 as measurement
Micro electronmechanical metering units 7 are installed in runner, the measurement runner;
According to above-described embodiment, add in above-mentioned micro electronmechanical metering units 7 provided with temperature sensor A, temperature sensor B with micro-
Hot device, temperature sensor A, temperature sensor B and micro-heater is installed in the near middle of the measurement runner, the temperature
Degree sensors A is connected with the signal acquisition terminal of signal gathering unit respectively with temperature sensor B signal output part.Based on this reality
Gas meter, flow meter structure above-mentioned in example is applied, the process drawn of above-mentioned mass flow calculation formula is as follows:
Combustion gas quality flow measurement principle is introduced first:Combustion gas flows into air inlet pipe 16 from gas meter, flow meter air inlet, then
Air-flow rectilinear duct is oriented to by radome fairing 5, into measurement runner 8 combustion gas and other air-flow rectilinear ducts total combustion gas into one
Gas flow in certainty ratio, order measurement runner is qm, into measurement runner and the total gas flow rate of other air-flow rectilinear ducts
For q, it is a shunting specific ray constant C to measure gas flow in runner and account for total gas flow rate q ratio, and shunting specific ray constant C is by outlet
(split ratio C realizes automatic calibration in different flow point, it is ensured that metering is accurate) of the structures shape of pipe 10 itself, then q=qm/ C, qm
Drawn by following computational methods:
Temperature difference T is measured by micro-heater upstream and downstream symmetrically arranged temperature sensor A and temperature sensor B, then
Heat Q=K × A × Δ the T conducted from upstream toward downstream, wherein, K is instrument constant, and A is heater and surrounding environment heat exchange
The coefficient of heat conduction, these origin of heat are in the flowing of air-flow.The heat that air-flow is brought is qm×Cp, wherein CpTo be tested gas
Specific heat at constant pressure, i.e. K × A × Δ T=q equal according to the twom×Cp, can draw:Therefore, by measuring
Temperature difference T, you can calculate the mass flow of tested combustion gas.
Based on above-mentioned mass flow calculation formula calculation, the coefficient of heat conduction that microcomputer controller is carried out, instrument
Table constant, specific heat at constant pressure are modified specific as follows:
It is relevant with gas componant that mass flow processing module calculates the coefficient of heat conduction used;Mass flow processing module exists
The heat transmitted in temperature changing process, by the different gas componant of microcomputer controller correspondence in mass flow calculation formula
The coefficient of heat conduction be modified.
It is relevant with measurement gas flow split ratio, pipeline configuration that mass flow processing module calculates the instrument constant used;
Actual pipeline configuration has different, and the instrument constant in mass flow calculation formula is entered by microcomputer controller correspondence difference
Row correction.
It is relevant with gas temperature, gas componant that mass flow processing module calculates the specific heat at constant pressure used;By micro computer
Controller is corrected with various regions according to gas temperature using gas componant to the specific heat at constant pressure in mass flow calculation formula.
Before the correction that above-mentioned microcomputer controller is carried out to the parameters in formula, inventor is referring also to existing skill
Art, is corrected first using mass flow processing module to the above-mentioned coefficient of heat conduction, instrument constant, specific heat at constant pressure, tool
Body is as follows:
Differentiation in certain limit is had a case that according to instrument design in itself, mass flow processing module is in memory module
In can be stored in instrument constant characteristic correction table, when long according to the local atmospheric pressure of actual use client, peripheral environment, instrument
Between work after, meter parameter has different change, and mass flow processing module is corrected according to these characteristics.
Mass flow processing module, using the inconsistent situation of natural gas density, is deposited in a storage module according to user area
Air pressure density and external pressure the change of divergence constant checking list are entered, mass flow processing module can be carried out after multiple repairing weld
After contrast confirms, specific heat at constant pressure parameter correction is carried out.Parameter is put into memory module after correction.
Referring again to shown in Fig. 1, in the present invention for solving in the more preferred one embodiment of technical problem, inventor
Further the error rate of reduction mass flow gas meter, flow meter metering, lifts microcomputer controller and deducts preset tolerance according to metric results
The degree of accuracy of value, on the basis of above-described embodiment gas meter, flow meter structure, is additionally arranged temperature sensor C, temperature sensor C is accessed
Microcomputer controller, for detecting ambient temperature by temperature sensor C, and current temperature value is transmitted to micro computer control
Device, then sent by microcomputer controller to memory module.
So that mass flow processing module can also be adopted based on the temperature value in memory module to environment temperature and every time
The error curve of the parameter of sample is corrected, specific as follows:
Environment temperature is corrected:According to sensor characteristics, mass flow processing module is directed to temperature sensor A and temperature respectively
Two sensors of sensor B are sampled, and sampling is simultaneously respectively for temperature sensor A and two sensors of temperature sensor B
Linear Amplifer is carried out, the progress that is superimposed again while then amplified signal is exported is with mutually amplification, the A and B in sampling
Two sensors are actual or carrying out heating process, and mass flow processing module is according to the temperature value of current outside environment, profit
With current temperature value should corresponding temperature difference threshold range, to the temperature of A and the whole story of the temperature change of two temperature sensors of B
Degree difference is corrected, it is ensured that the accuracy that above-mentioned formula is calculated.
Error curve is corrected:Mass flow processing module is according to Millisecond carry out data sampling per second, sampled data identification
Hundredths after decimal point, error curve correction is carried out for the mode that thousand points of positions are rounded up after decimal point, be conducive into
Row linearization process, sampling is all a level digital every time, and a sampling curve is just had for multiple repairing weld and is come out, and is used
It in the range of a sampling curve, 3V~5V is also a sampling curve that can be in the range of 1V~3V, similarly in the range of 1V~5V
It is also a sampling curve, mass flow processing module carries out certain correction for this sampling curve.
In addition, microcomputer controller can also pass through the error curve of method similar to the above to digital quality information
Secondary correction is carried out with environment temperature, further to lift digital quality information accuracy.
Further, inventor, referring also to prior art, is the circuit knot that analog-to-digital conversion is realized in signal processing unit
Structure, is also additionally arranged analog signal amplification module and A/D analog-to-digital conversions between mass flow processing module and signal gathering unit
Module.
On the other hand, the conventional structure based on intelligent gas meter, can also access storage again by above-mentioned microcomputer controller
The preset tolerance value that is stored with unit, the memory cell (gas quantity that i.e. user supplements with money), for by microcomputer controller according to
Digital quality information is deducted to the preset tolerance value in memory cell, when preset tolerance value is 0, by microcomputer controller
Electromechanical valve is closed by valve control circuit.
It is the security that further lifting combustion gas is used in another embodiment of the invention referring still to shown in Fig. 1,
Under-voltage protecting circuit, power-off protecting circuit, high voltage protection circuit and flow overcurrent protection can be also set up in above-mentioned gas meter, flow meter
Circuit, under-voltage protecting circuit, power-off protecting circuit, high voltage protection circuit and flow current foldback circuit respectively with it is micro computer controlled
Device processed is connected, for occurring under-voltage working power, power cut-off or more during IC-card intelligent quality flow gas table use
When changing battery, occurring high voltage, gas flow and be continued above the situation of target flow, valve control circuit is passed through by microcomputer controller
Electromechanical valve is completed to close the operation of valve.In addition, acceleration transducer can be also set up in gas meter, flow meter, for by acceleration sensing
Device detects environmental vibration, when occurring earthquake, by the information transmission detected to microcomputer controller, is led to by microcomputer controller
Cross valve control circuit and close electromechanical valve.
Further, it is the stability of guarantee combustion gas apparent source, power sense circuit can be also set up in above-mentioned gas meter, flow meter,
Power sense circuit one end is connected with the power supply circuit being powered for each module of gas meter, flow meter, the other end and microcomputer controller phase
Even, micro computer control is given for detecting supplying cell voltage and the time apart from predicted life, and by power source life information transfer
Device;
Further, above-mentioned gas meter, flow meter also includes display and alarm, and display and alarm are connected to micro- electricity
On brain controller, the display is used to show metrical information, control information and management information, and the metrical information includes gas
The information such as instantaneous delivery, accumulative gas flow, control information includes the information such as valve control information, and management information is believed including valve state
The information such as breath, charging information;The alarm is used for the alarm operation for completing gas meter, flow meter table end.
It is more preferable that the generation gas reverse flow of escape pipe 10 to prevent above-mentioned gas meter, flow meter, or prevent when stopping the supple of gas or steam
Only negative pressure is mixed into air, can also install anti-backflow device 15 in the outlet side of escape pipe 10, for when adverse current occurs in combustion gas, preventing
Backflow device 15 closes escape pipe 10 under self gravitation and counter-current gas pressure collective effect.
With reference to shown in Fig. 3, the difference in functionality that above-mentioned microcomputer controller is performed according to it at table end is broadly divided into intelligence
Energy management through quantification module, Intelligent management module and digital quality information processing module, wherein:
Digital quality message processing module:For realizing the storage of digital quality information, error curve correction, environment temperature school
Just, instrument constant characteristic correction, specific heat at constant pressure correction, the function of mass metrology informix processing.As mentioned here above
, digital quality information storage refers to the storage to relevant parameters such as temperature difference parameter correction, instrument constant corrections.Error is bent
Line correction is corrected for the design parameter sampled every time.Environment temperature correction is that the temperature difference for being directed to use environment is entered
Row correction.Instrument constant characteristic correction be for instrument use environment, pressure, work long hours after parameter differences carry out school
Just.Specific heat at constant pressure correction refers to the specific heat at constant pressure parameter differences correction of tested gas.Mass metrology informix is handled
Refer to integrated treatment after temperature, instrument, pressure and other parameters Integral correction.
Referring still to shown in Fig. 3, Intelligent management module is used to realize pre-payment management and table end intelligent control, wherein prepaying
Expense management function is reduced including IC-card read-write, tolerance, tolerance SC service ceiling is controlled, purchase tolerance is cumulative controls, information back feedback
Control etc.;Table end intelligent control function specifically includes overcurrent protection, overtime protection, limitation protection, discharge prevention, maloperation and carried
Show, high voltage protection, under-voltage protection, auto-lock function, fault diagnosis, ID management, state self-inspection, parameter setting, undervoltage warning
Prompting, power down shut-off protection, Valve controlling, the shut-off of zero tolerance, tolerance alarm, screen display control, supplement the work(such as display, upper electricity display with money
Energy.
Intelligent metering management module:For realize mass flow metering, metrical information storage, metrical information real-time report,
Metrical information instruction reports, measures the work(such as overtime protection, metering overcurrent protection, the real-time ladder gas price in table end, consumption curve record
Energy.
Wherein, IC-card intelligent quality flow gas table also includes reset circuit and enquiry circuit, and reset switch is by resetting
Circuit connects microcomputer controller, and safety reset can be carried out to gas meter, flow meter by reset switch;Inquiry switch passes through enquiry circuit
Microcomputer controller is connected to, gas meter, flow meter relevant information, such as gas metering information, control letter can be inquired about automatically by inquiring about switch
Breath, civil gas management information etc..
With reference to shown in Fig. 5, an alternative embodiment of the invention is a kind of IC-card intelligent quality flow gas list management system,
The system includes IC-card intelligent quality flow gas table and gas intelligent management system, multiple IC-cards in multiple above-described embodiments
Intelligent quality flow gas table accesses gas intelligent management system, for passing through IC-card and IC-card by gas intelligent management system
Carry out data transmission between intelligent quality flow gas table;Above-mentioned gas intelligent management system includes:
Service management module, opens an account for realizing, hair fastener, payment, move back expense, changes table, transfer, cancellation meter reading and blacklist pipe
Reason;
Basic data module, for realizing that website is set, region is set, table type is set, payment type is set, factory
Family is set;
IC-card management module, makees for implementation tool blocking, mends card and IC-card reparation;
Statement management module, for realizing that user basic information Report Server Management, the management of subscriber payment information report, user mend
Card information Report Server Management, daily sheet management, moon sheet management, year Report Server Management;
System setup module:For realizing that Administrator, menu setting, password are set, invoice format is set, serial ports is set
Put.
Than that described above, in addition it is also necessary to which explanation is " one embodiment ", " another implementation spoken of in this manual
Example ", " embodiment " etc., refer to that the specific features, structure or the feature that combine embodiment description are included in the application summary
Property description at least one embodiment in.It is not necessarily to refer to same reality that statement of the same race, which occur, in multiple places in the description
Apply example.Furthermore, it is understood that when describing a specific features, structure or feature with reference to any embodiment, what is advocated is knot
Other embodiment is closed to realize that this feature, structure or feature are also fallen within the scope of the present invention.
Although reference be made herein to invention has been described for multiple explanatory embodiments of the invention, however, it is to be understood that
Those skilled in the art can be designed that a lot of other modification and embodiment, and these modifications and embodiment will fall in this Shen
Please be within disclosed spirit and spirit.More specifically, can in the range of disclosure, drawings and claims
A variety of variations and modifications are carried out with the building block to theme composite configuration and/or layout.Except to building block and/or layout
Outside the variations and modifications of progress, to those skilled in the art, other purposes also will be apparent.