CN104700506B - Safety cut-off type remote-control intelligent mass flow gas meter, flow meter and its management system - Google Patents
Safety cut-off type remote-control intelligent mass flow gas meter, flow meter and its management system Download PDFInfo
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Abstract
The invention discloses a kind of safety cut-off type remote-control intelligent mass flow gas meter, flow meter and its management system, belong to a kind of combustible gas metering arrangement, described gas meter, flow meter includes microcomputer controller, micro electronmechanical metering units, valve control circuit combustion gas use state acquisition process unit and communication module, and the micro electronmechanical metering units pass sequentially through signal gathering unit, signal processing unit access microcomputer controller；The microcomputer controller is connected by valve control circuit with stop valve；The microcomputer controller is also connected with communication module；The present invention uses mass flow metering principle, no mechanical transmission component, it is to avoid the measurement problem that mechanical aging is brought, it is ensured that measuring accuracy；And 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.
Description
Technical field
The present invention relates to a kind of combustible gas metering arrangement, in particular, the invention mainly relates to a kind of safety cut-off type is remote
Control intelligent quality flow gas table and its management system.
Background technology
As the cleanings such as natural gas, high efficient energy sources are developed rapidly, increasing town dweller uses natural gas, and fire
Gas measurement instrument is the necessary equipment of natural gas consumption metering clearing.At present, domestic gas metering base table is mainly mechanical combustion
Gas meter, using volumetric metering principle, the volume flow of gas is measured by flexible membrane measuring room mode.Flexible membrane is easy
Influenceed by moisture, dust etc. in natural gas, the mechanical gas table based on mechanical driven principle, during long-term use not
It can avoid that mechanical aging phenomenon occurs, and then measuring accuracy is also deteriorated therewith, reliability is not high, restricted lifetime.In addition,
The promotion of mechanical device will also result in the pressure loss, in turn result in the loss on meterage.
Using the metering base table of volumetric metering principle, its measuring accuracy is larger by pressure and temperature effect, if temperature, pressure
Power does not do any amendment, will produce metering loss, and side more by north, metering loss is bigger, such as in Jinan, pressure and temperature two because
There may be 5% metering loss for element.In this case, it is guarantee metering accuracy, it is necessary to which the amendment of external temp volume is filled
Put and be corrected for, and on the one hand external temp volume correcting device influences the integral structure of whole measurement instrument, and then influence
The accuracy of base table metering is measured, on the other hand, the temperature volume correcting device installed additional can increase cost.In order to tackle existing machine
Tool formula gas meter, flow meter is not due to the problems such as measuring accuracy caused by mechanical wear is high, reliability is not high, service life is limited, in the market
Start the gas meter, flow meter on probation based on ultrasonic wave principle and the gas meter, flow meter based on MEMS principles, but there is following ask in this two classes product
Topic：One is that the gas meter, flow meter based on ultrasonic wave principle is to utilize following current and propagation of the countercurrent direction ultrasonic signal in gas medium
Time difference calculates the flow velocity of gas medium, and then calculates instantaneous delivery, integrated flow, but the existing combustion based on ultrasonic wave principle
Gas meter bad adaptability, can only adapt to single source of the gas, and the source of the gas that most domestic user uses is mixed type source of the gas, therefore simultaneously
It is inapplicable.In addition, the gas meter, flow meter based on ultrasonic wave principle is high to flow rates demand, it is impossible to handle Pulsating Flow.Two be former based on MEMS
The gas meter, flow meter of reason refers to the combustible gas metering arrangement developed using MEMS flows chip technology.MEMS is MEMS (Micro-
Electro-Mechanical Systems) abbreviation.Influences of the MEMS to product not only includes reduction but also the bag of cost
The reduction that size and weight are realized in the case where not sacrificing performance is included, therefore, the gas meter, flow meter product based on MEMS principles has
Certain advantage.But because the existing gas meter, flow meter based on MEMS principles is also in experimental stage, product function also imperfection, production
Product intelligence degree is not high, and Product Safety need to be improved.
The content of the invention
An object of the present invention is that there is provided a kind of combustion of safety cut-off type remote-control intelligent mass flow for above-mentioned deficiency
Gas meter and its management system, it is larger with the metering base table error for expecting to solve volumetric metering principle in the prior art, install temperature additional
Volume correction device increase production cost is spent, the base table of ultrasonic wave principle metering is not suitable for mixing source of the gas, it is impossible to which combustion gas is supplied
To technical problems such as cut-outs with high safety.
To solve above-mentioned technical problem, the present invention uses following technical scheme：
One aspect of the present invention provides a kind of safety cut-off type remote-control intelligent mass flow gas meter, flow meter, described gas meter, flow meter bag
Include microcomputer controller, micro electronmechanical metering units, valve control circuit, combustion gas use state acquisition process unit and communication module, institute
State micro electronmechanical metering units and pass sequentially through signal gathering unit, signal processing unit access microcomputer controller, for by signal
Processing unit is by digital quality information transfer to microcomputer controller；The microcomputer controller passes through valve control circuit and stop valve
It is connected, the open and close for controlling stop valve；The microcomputer controller is also connected with communication module, for by micro- electricity
Brain controller carries out telecommunication by communication module and gas intelligent management system, by safety cut-off type remote-control intelligent quality stream
The table client information real-time Transmission of gas meter, flow meter is measured to gas intelligent management system, and receives the finger that gas intelligent management system is issued
Order；
At the access of combustion gas use state acquisition process the unit microcomputer controller, and the combustion gas use state collection
Reason unit collection terminal also access micro electronmechanical metering units, by by combustion gas use state acquisition process unit collection it is micro electronmechanical based on
The flow information that combustion gas is passed through inside unit is measured, and is converted into corresponding electronic measurement pulse signal input micro computer control
Device；The inside of the microcomputer controller is at least preset with abnormal tiny flow quantity leakage corresponding with micro electronmechanical metering units, different
Normal big flow and the long abnormality threshold range of use time, for coming from combustion gas use state acquisition process unit
Electronic measurement pulse signal in the flow information that includes contrasted, judged whether to close by valve control circuit according to comparing result
Close stop valve；
At least include mass flow processing module in the signal processing unit, the mass flow processing module connects respectively
Enter memory module and microcomputer controller, for by mass flow processing module based on the mass flowmenter stored in memory module
Formula is calculated, the digital temperature signal that signal gathering unit is collected is converted into digital quality information；Described memory module is also
Access microcomputer controller, for by microcomputer controller to the coefficient of heat conduction in mass flow calculation formula, instrument constant,
Specific heat at constant pressure is modified.
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, stop 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 being used in safety cut-off type remote-control intelligent mass flow gas meter, flow meter
Occur under-voltage working power, power cut-off in journey or change battery, occur high voltage, gas flow and be continued above target flow
During situation, the operation of pass valve is completed to stop valve by valve control circuit by microcomputer controller.
Further technical scheme is：Also include sensor detection module, the sensor detection in the gas meter, flow meter
Module accesses microcomputer controller by communication interface, the current shape for detecting gas meter, flow meter external environment condition by external sensor
State, and corresponding environmental information is transmitted to sensor detection module, adopted by microcomputer controller from sensor detection module
Collect environmental information, judged whether to close stop valve by valve control circuit according to current environmental information；The external sensor bag
Include earthquake vibrating sensor, gaseous-pressure sensor, gas concentration detection alarm, among compound alarm any one or it is many
Kind.
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 stop 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 safety cut-off type remote-control intelligent mass flow combustion gas list management system, institute
The system stated includes multiple above-mentioned safety cut-off type remote-control intelligent mass flow gas meter, flow meters and gas intelligent management system, described
Multiple safety cut-off type remote-control intelligent mass flow gas meter, flow meters access gas intelligent management system, for remote by safety cut-off type
Two-way communication is carried out between control intelligent quality flow gas table and gas intelligent management system；In the gas intelligent management system
Including：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, table type is set, payment type is set, manufacturer is set；
Remote supervision module, for realizing remote meter reading, remote valve control, remote alarms and telecommunication；Statement management module, for reality
Existing user basic information Report Server Management, subscriber payment information report are managed, user's benefit card information Report Server Management, daily sheet are managed,
Moon sheet management, year Report Server Management；System setup module：For realizing Administrator, menu setting, password setting, invoice
Form is set, 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) telecommunication technique is combined, remote meter reading, remote recharge, long-range ladder gas price, remote valve control and remote is realized
Journey is alarmed, and is easy to remote fuel gas intelligent management and long-distance intelligent control, is improved service and the efficiency of civil gas management, it is ensured that
Combustion gas gas safety.
(6) 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.
(7) 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.
(8) 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；
(9) there are the exception shapes such as low discharge leakage, abnormal big flow and use time be long detecting base table body
During state, the stop valve that can be closed in time on base table body, and can be alarmed by liquid crystal display, buzzer, it is to avoid gas leakage
It is excessive, burning or explosion phenomenon are caused, people's safety of life and property is protected.
Brief description of the drawings
Fig. 1 is the structured flowchart for illustrating one embodiment of the invention；
Fig. 2 is for illustrating that the combustion gas state acquisition of one embodiment of the invention handles block diagram；
Fig. 3 is the structured flowchart for illustrating the signal processing unit in one embodiment of the invention；
Fig. 4 is for illustrating the microcomputer controller functional block diagram in one embodiment of the invention；
Fig. 5 is for illustrating the table end intelligent control function block diagram in one embodiment of the invention；
Fig. 6 is the structural representation for illustrating another embodiment of the present invention；
Fig. 7 is the structured flowchart for illustrating further embodiment of the present invention；
Fig. 8 is for illustrating the gas intelligent management system block diagram in further embodiment of the present invention；
In figure, 1 be electric resistance welding joint, 2 be barrel cover, 3 be watch shell, 4 be stop valve, 5 be radome fairing, 6 be current divider, 7
It is measurement runner for micro electronmechanical metering units, 8,9 be sprue, 10 be escape pipe, 11 be display, 12 is main circuit board, 13
It is inquiry switch for radio-frequency antenna, 14,15 be anti-backflow device, 16 is air inlet pipe.
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 safety cut-off type remote-control intelligent mass flow gas meter, flow meter,
The gas meter, flow meter includes microcomputer controller, micro electronmechanical metering units, valve control circuit and communication module；As shown,
Foregoing micro electronmechanical metering units pass sequentially through signal gathering unit, signal processing unit access microcomputer controller, for by
Signal processing unit is by digital quality information transfer to microcomputer controller；Wherein microcomputer controller by valve control circuit with cutting
Disconnected valve is connected, the open and close for controlling stop valve；Foregoing microcomputer controller is also connected with communication module, for by
Microcomputer controller carries out telecommunication by communication module and gas intelligent management system, by safety cut-off type remote-control intelligent matter
The table client information real-time Transmission of flow gas table is measured to gas intelligent management system, and receives what gas intelligent management system was issued
Instruction；
With reference to shown in Fig. 2, above-mentioned combustion gas use state acquisition process unit access microcomputer controller, and the combustion gas
The collection terminal of use state acquisition process unit also accesses micro electronmechanical metering units, for by combustion gas use state acquisition process list
The flow information that combustion gas is passed through inside the micro electronmechanical metering units of member collection, and it is converted into corresponding electronic measurement pulse signal
Input microcomputer controller；And the inside of above-mentioned microcomputer controller is at least preset with exception corresponding with micro electronmechanical metering units
Tiny flow quantity leakage, the abnormality threshold range of abnormal big flow and use time long (continuing flow overtime), for
The flow information included in the electronic measurement pulse signal for coming from combustion gas use state acquisition process unit is contrasted, according to
Comparing result judges whether to close stop valve by valve control circuit；Go out as shown in Figure 2, in foregoing microcomputer controller also
It may include the combustion gas threshold range such as unused, overload for a long time.
Detecting the abnormalities such as low discharge leakage, abnormal big flow occurs in base table body and use time is long
When, the stop valve that can be closed in time on base table body, it is to avoid gas leakage is excessive causes burning or explosion phenomenon, protects people
Safety of life and property；
In addition, triggering microcomputer controller in above-mentioned abnormal conditions, perform it and close after the operation of stop valve, be timely
Remind user to know, the function of alarm can be also designed on gas meter, flow meter；Therefore liquid is set up in gas meter, flow meter again in the present embodiment
Crystalline substance screen and buzzer, and liquid crystal display and buzzer are also accessed into microcomputer controller, and be at least used to aid in terminal micro computer controlled
Device processed completes the operation of alarm, i.e., when any one above-mentioned abnormality occurs in gas meter, flow meter, while pass valve is carried out, also lead to
Cross buzzer and carry out sound and light alarm with liquid crystal display.
Above-mentioned combustion gas is not used for a long time to be referred in normal conditions of use, when combustion gas use state acquisition process unit exists
Flow is not detected by the time (most long 30 days) of setting.
Abnormal tiny flow quantity leakage refers under regular service conditions, with less than 2 times initial-flows in micro electronmechanical metering units
Combustion gas persistently circulate when reaching setting value (most long 10 days)；Foregoing initial-flow, which refers to, refers to that the flow for flowing through gas meter, flow meter can be real
The flow that existing gas meter, flow meter is counted.
Abnormal big flow refers to that in normal conditions of use, the flow for the micro electronmechanical metering units that circulate exceedes Gas appliance most
When greatly using 1.5 times of flow；When there is the situation of abnormal big flow, microcomputer controller closes stop valve simultaneously in 120S
Alarm, while reporting current pass valve information and warning message to gas intelligent management system by communication module.
Continue flow time-out to refer in normal conditions of use, persistently use with any relative constancy flow when gas meter, flow meter
Time exceedes the setting value that manufacturer states.
Gas leakage cut-out refers to that in normal conditions of use microcomputer controller receives the alarm of outer combustion gas Concentration Testing
During the alarm signal that device is transmitted.
Even more important technological means is in the present embodiment：
At least need to include mass flow processing module with reference to shown in Fig. 3, 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. 6, 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 stop 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, measurement is passed through
Go out 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
Stop 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, and for occurring during safety cut-off type remote-control intelligent mass flow gas meter, flow meter use, working power is under-voltage, electricity
When source is powered off or replacing battery, generation high voltage, gas flow are continued above the situation of target flow, led to by microcomputer controller
Valve control circuit is crossed stop valve is completed to close the operation of valve.
In addition, even if inventor also found that the combustion gas flowed through in micro electronmechanical metering units does not occur above-mentioned abnormal feelings
Condition, but if the external environment condition that gas meter, flow meter is installed is not suitable for using combustion gas, still easily there is security incident, therefore to make combustion gas
Table in the case of use, can also make the partial parameters in external environment condition in the micro electronmechanical metering units of guarantee under non-abnormality
The condition of shut-off stop valve is carried out for triggering microcomputer controller；Sensor detection module is specially set up in gas meter, flow meter, and
Sensor detection module is accessed into microcomputer controller by communication interface, for being detected by external sensor outside gas meter, flow meter
The current state of environment, and corresponding environmental information is transmitted to sensor detection module, microcomputer controller is examined from sensor
Survey in module and gather environmental information, judged whether to close stop valve by valve control circuit according to current environmental information；And it is foregoing
External sensor can be selected according to the field of employment of gas meter, flow meter with area, it is determined that using one or more；Such as earthquake
Vibrating sensor, gaseous-pressure sensor, gas concentration detection alarm, and or compound alarm etc..Foregoing sensor
Detection module refers to the detection means for connecting external sensor, and the signal for external sensor to be passed over is converted into switch
Output signal is measured, and switching value output signal can be delivered to microcomputer controller.
Preferably, above-mentioned communication module can be using GSM message module, GPRS module, ZigBee module, low-frequency wireless letter
Any one in number module, LoRa wireless modules, infrared transceiver module, Ethernet wireless module and other radio-frequency communication moulds
Block, or RS485 communication modules, M-BUS communication modules, power carrier communication module any one wire transmission module.
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. 4, 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, remote-control 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.
With reference to shown in Fig. 5, remote-control intelligent management：For realizing long-distance intelligent management, table end intelligent control and telecommunication
The function of management.Long-distance intelligent management function specifically include real time remote supplement with money, real time remote price adjustment, real-time ladder gas price, reality
When the function such as remote valve control, Electric Remote Meter Reading.Table end intelligent control function specifically includes overcurrent protection, overtime protection, limitation
Protection, discharge prevention, maloperation prompting, 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
Make, supplement the functions such as display, upper electricity display with money.Telecommunication administration function specifically includes wake-up management, bubbling control, phasitron
Reason, double-channel management, sensitivity preferably, be in charge of with frequency difference reason, broadcast communication management, three-layer network management, concentrator manage, in
After functions such as device management, hand-held set management GPRS management.
Intelligent metering is managed：For realizing mass flow metering, metrical information storage, metrical information real-time report, metering
Information command reports, measures the functions such as overtime protection, metering overcurrent protection, the real-time ladder gas price in table end, consumption curve record.
Wherein, the combustion gas of remote-control intelligent mass flow also includes reset circuit and enquiry circuit, and reset switch is by resetting electricity
Road connects microcomputer controller, and safety reset can be carried out to gas meter, flow meter by reset switch；Inquiry switch is connected by 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. 7, an alternative embodiment of the invention is a kind of safety cut-off type remote-control intelligent mass flow combustion gas
List management system, the system includes safety cut-off type remote-control intelligent mass flow gas meter, flow meter and combustion gas in multiple above-described embodiments
Intelligent management system, multiple safety cut-off type remote-control intelligent mass flow gas meter, flow meters access gas intelligent management system, are used for
Two-way communication is carried out between safety cut-off type remote-control intelligent mass flow gas meter, flow meter and gas intelligent management system；Foregoing is more
Individual remote-control intelligent gas meter preferably accesses gas intelligent management system by multistage communication device, during multistage communication device can be used
After the combination of device and concentrator, but it is not limited to such；With reference to shown in Fig. 8, 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；
Remote supervision module, for realizing remote meter reading, remote valve control, remote alarms and telecommunication；Remote meter reading work(
Can specifically include remotely open an account, the inquiry of remote recharge, remote status, the work(such as long-range price adjustment, long-range ladder gas price, long-range cancellation
Energy；Remote alarming function specifically include over voltage alarm, undervoltage warning, metering excessively stream alarm, Sorry, your ticket has not enough value alarm and gas leakage
The functions such as alarm.
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.
Claims (7)
1. a kind of safety cut-off type remote-control intelligent mass flow gas meter, flow meter, it is characterised in that：Described gas meter, flow meter includes micro computer
Controller, micro electronmechanical metering units, valve control circuit, combustion gas use state acquisition process unit and communication module, it is described micro electronmechanical
Metering units pass sequentially through signal gathering unit, signal processing unit access microcomputer controller, for by signal processing unit
By digital quality information transfer to microcomputer controller；The microcomputer controller is connected by valve control circuit with stop valve, is used
In the open and close of control stop valve；The microcomputer controller is also connected with communication module, for by micro computer control
Device carries out telecommunication by communication module and gas intelligent management system, by safety cut-off type remote-control intelligent mass flow combustion gas
The table client information real-time Transmission of table receives the instruction that gas intelligent management system is issued to gas intelligent management system；
The combustion gas use state acquisition process unit accesses microcomputer controller, and the combustion gas use state acquisition process list
The collection terminal of member also accesses micro electronmechanical metering units, for single by the micro electronmechanical metering of combustion gas use state acquisition process unit collection
The flow information that first internal combustion gas is passed through, and it is converted into corresponding electronic measurement pulse signal input microcomputer controller；
The inside of the microcomputer controller is at least preset with abnormal tiny flow quantity leakage corresponding with micro electronmechanical metering units, different
Normal big flow and the long abnormality threshold range of use time, for coming from combustion gas use state acquisition process unit
Electronic measurement pulse signal in the flow information that includes contrasted, judged whether to close by valve control circuit according to comparing result
Close stop valve；
At least include mass flow processing module in the signal processing unit, the mass flow processing module is respectively connected to deposit
Module and microcomputer controller are stored up, for public based on the mass flow calculation stored in memory module by mass flow processing module
Formula, digital quality information is converted into by the temperature signal that signal gathering unit is collected；Described memory module also accesses micro- electricity
Brain controller, for by microcomputer controller to the coefficient of heat conduction in mass flow calculation formula, instrument constant, specific heat at constant pressure
Appearance is modified；
Described gas meter, flow meter also includes temperature sensor C, and the temperature sensor C accesses microcomputer controller, for by temperature
Sensor C detects ambient temperature, and current temperature value is transmitted to microcomputer controller；
The mass flow processing module is additionally operable to the error curve for the parameter that basis is sampled to environment temperature and every time to public affairs
Temperature difference in formula is corrected；Analog signal amplification is additionally provided between the mass flow processing module and signal gathering unit
Module and A/D analog-to-digital conversion modules；The microcomputer controller is built-in with the amendment table of comparisons, by correction chart to mass flowmenter
The coefficient of heat conduction in formula, instrument constant, specific heat at constant pressure is calculated to be modified；
The microcomputer controller also accesses the preset tolerance value that is stored with memory cell, the memory cell, for by micro- electricity
Brain controller is deducted according to digital quality information to the preset tolerance value in memory cell, when preset tolerance value is 0, by
Microcomputer controller closes stop valve by valve control circuit.
2. safety cut-off type remote-control intelligent mass flow gas meter, flow meter according to claim 1, it is characterised in that：Described combustion
Gas meter also includes under-voltage protecting circuit, power-off protecting circuit, high voltage protection circuit and flow current foldback circuit, under-voltage protection
Circuit, power-off protecting circuit, high voltage protection circuit and flow current foldback circuit are connected with microcomputer controller respectively, are used for
Occur under-voltage working power, power cut-off during safety cut-off type remote-control intelligent mass flow gas meter, flow meter use or change electricity
When pond, generation high voltage, gas flow are continued above the situation of target flow, by microcomputer controller by valve control circuit to cutting
Disconnected valve completes to close the operation of valve.
3. safety cut-off type remote-control intelligent mass flow gas meter, flow meter according to claim 1, it is characterised in that：The combustion gas
Also include sensor detection module in table, the sensor detection module accesses microcomputer controller by communication interface, is used for
The current state of gas meter, flow meter external environment condition is detected by external sensor, and corresponding environmental information is transmitted to sensor detection
Module, environmental information is gathered by microcomputer controller from sensor detection module, is judged whether according to current environmental information
Stop valve is closed by valve control circuit；The external sensor includes earthquake vibrating sensor, gaseous-pressure sensor, gas concentration inspection
Survey alarm, any one or more among compound alarm.
4. safety cut-off type remote-control intelligent mass flow gas meter, flow meter according to claim 1, it is characterised in that：Described combustion
Gas meter also includes power sense circuit, power sense circuit one end and the power supply circuit phase being powered for each module of gas meter, flow meter
Even, the other end is connected with microcomputer controller, for detecting supplying cell voltage and the time apart from predicted life, and by power supply
Life information is transferred to microcomputer controller；
Described gas meter, flow meter also includes display and alarm, and display and alarm are connected on microcomputer controller, described
Display is used to show metrical information, control information and management information, and the metrical information includes gas instantaneous delivery, accumulative gas
Body flow information, control information includes valve control information, and management information includes valve state information, charging information information；Institute
State the alarm operation that alarm is used to complete gas meter, flow meter table end.
5. safety cut-off type remote-control intelligent mass flow gas meter, flow meter according to claim 1, it is characterised in that：The combustion gas
Table includes air inlet pipe (16), escape pipe (10) and the display (11) being tightly connected respectively with electric resistance welding joint (1), described aobvious
Show that device (11) is arranged on the outside of gas meter, flow meter, stop valve (4) is installed in air inlet pipe (16)；The inside of the gas meter, flow meter is also equipped with
The current divider (6) being connected with gas meter, flow meter internal cavity, the inside of the current divider (6) is additionally provided with multiple air-flow rectilinear ducts,
The inlet end of the current divider (6) is additionally provided with an air-flow rectilinear duct conduct at the top of radome fairing (5), the current divider (6)
Measure in runner, the measurement runner and micro electronmechanical metering units (7) are installed；
The micro electronmechanical metering units (7) include temperature sensor A, temperature sensor B and micro-heater, the temperature sensor
A, temperature sensor B and micro-heater are installed in the near middle of the measurement runner, and the temperature sensor A is passed with temperature
Sensor B signal output part is connected with the signal acquisition terminal of signal gathering unit respectively.
6. safety cut-off type remote-control intelligent mass flow gas meter, flow meter according to claim 5, it is characterised in that：The outlet
The outlet side of pipe (10) is also equipped with anti-backflow device (15), for when adverse current occurs in combustion gas, anti-backflow device (15) to be certainly
Escape pipe (10) is closed under body gravity and counter-current gas pressure collective effect.
7. a kind of safety cut-off type remote-control intelligent mass flow combustion gas list management system, it is characterised in that：Described system includes
Safety cut-off type remote-control intelligent mass flow gas meter, flow meter described in multiple claim 1 to 6 any one is managed with gas intelligent
System, the multiple safety cut-off type remote-control intelligent mass flow gas meter, flow meter accesses gas intelligent management system, for by pacifying
Full two-way communication is carried out between cut-out type remote-control intelligent mass flow gas meter, flow meter and gas intelligent management system；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, table type is set, payment type is set, manufacturer sets
Put；
Remote supervision module, for realizing remote meter reading, remote valve control, remote alarms and telecommunication；
Statement management module, for realizing that user basic information Report Server Management, the management of subscriber payment information report, user mend card letter
Cease 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 port setting.
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| CN201510150492.7A CN104700506B (en) | 2015-03-31 | 2015-03-31 | Safety cut-off type remote-control intelligent mass flow gas meter, flow meter and its management system |
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| CN201510150492.7A CN104700506B (en) | 2015-03-31 | 2015-03-31 | Safety cut-off type remote-control intelligent mass flow gas meter, flow meter and its management system |
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