CN104700505A - Remotely-controlled intelligent mass flow rate gas meter and management system thereof, - Google Patents
Remotely-controlled intelligent mass flow rate gas meter and management system thereof, Download PDFInfo
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Abstract
The invention discloses a remotely-controlled intelligent mass flow rate gas meter and a management system thereof, and belongs to a gas metering device. The gas meter comprises a microcomputer controller, a micro-electro-mechanical system metering unit, a valve control circuit and a communication module. The micro-electro-mechanical system metering unit accesses to the microcomputer controller through a signal collection unit and a signal processing unit sequentially. The microcomputer controller is connected with a cut-off valve through the valve control circuit and is also connected with the communication module. The remotely-controlled intelligent mass flow rate gas meter and the management system thereof have the advantages that a mass flow rate metering principle is adopted, and mechanical transmission components are omitted, so that metering problems caused by mechanical aging are avoided, and metering accuracy is guaranteed; a temperature correction function is achieved through mass flow rate metering, a correction device does not need to be arranged externally to compensate temperature and pressure, and the whole meter is small in size, high in metering accuracy and high in reliability.
Description
Technical field
The present invention relates to a kind of combustible gas metering arrangement, in particular, the present invention relates generally to a kind of remote-control intelligent mass rate gas meter, flow meter and management system thereof.
Background technology
The develop rapidly of, high efficient energy sources clean along with rock gas etc., increasing town dweller uses rock gas, and gas metering utensil is the necessary equipment of rock gas consumption metering clearing.At present, domestic gas metering base table is mainly mechanical gas table, adopts volumetric metering principle, is carried out the volumetric flow rate of measurement gas by flexible diaphragm measuring room mode.Flexible diaphragm is subject to the impact of moisture, dust etc. in rock gas, based on the mechanical gas table of mechanical driven principle, in Long-Time Service process, unavoidably there will be mechanical aging phenomenon, and then measuring accuracy be also deteriorated thereupon, reliability is not high, restricted lifetime.In addition, the promotion of mechanical hook-up also can be lost by build-up of pressure, and then causes the loss on meterage.
Adopt the metering base table of volumetric metering principle, its measuring accuracy is comparatively large by pressure and temperature effect, if temperature, pressure do not do any correction, to produce gauging loss, side more by north, gauging loss is larger, as in Jinan, pressure and temperature two factors may produce the gauging loss of 5%.In this case, for ensureing metering accuracy, must be corrected by external temp volume correcting device, and external temp volume correcting device affects the integral structure of whole measurement instrument on the one hand, and then the accuracy of impact metering base table metering, on the other hand, the temperature volume correcting device installed additional can increase cost.Not high in order to tackle the measuring accuracy that existing machinery formula gas meter, flow meter causes due to mechanical wear, reliability is not high, the problems such as serviceable life is limited, market start on probation based on the gas meter, flow meter of ultrasonic wave principle and the gas meter, flow meter based on MEMS principle, but there is following problem in this two series products: one is be the flow velocity utilizing following current and the propagation time difference of countercurrent direction ultrasonic signal in gas medium to calculate gas medium based on the gas meter, flow meter of ultrasonic wave principle, and then calculating instantaneous delivery, integrated flow, but the existing gas meter, flow meter bad adaptability based on ultrasonic wave principle, single source of the gas can only be adapted to, and the source of the gas that most domestic user uses is all mixed type sources of the gas, and inapplicable therefore.In addition, the gas meter, flow meter based on ultrasonic wave principle is high to flow rates demand, cannot process Pulsating Flow.Two is refer to based on the gas meter, flow meter of MEMS principle the combustible gas metering arrangement adopting the exploitation of MEMS flow chip technology.MEMS is MEMS (micro electro mechanical system)
The abbreviation of (Micro-Electro-Mechanical Systems).MEMS realizes the reduction of size and weight when the impact of product is not only comprised to the reduction of cost but also is also included within and do not sacrifice performance, therefore, the gas meter, flow meter product based on MEMS principle has certain advantage.But because the existing gas meter, flow meter based on MEMS principle is also under test, product function is imperfection also, and intelligent product degree is not high, Product Safety need to improve.
Summary of the invention
An object of the present invention is for above-mentioned deficiency, a kind of remote-control intelligent mass rate gas meter, flow meter and management system thereof are provided, to expect that the metering base table error solving volumetric metering principle in prior art is larger, reload temperature volume correction device increases production cost, and the base table of ultrasonic wave principle metering is not suitable for the technical matterss such as mixing source of the gas.
For solving above-mentioned technical matters, the present invention by the following technical solutions:
One aspect of the present invention provides a kind of remote-control intelligent mass rate gas meter, flow meter, described gas meter, flow meter comprises microcomputer controller, micro electronmechanical metering units, valve control circuit and communication module, described micro electronmechanical metering units successively by signal gathering unit, signal processing unit access microcomputer controller, for by signal processing unit by digital quality information transmission to microcomputer controller; Described microcomputer controller is connected with electromechanical valve by valve control circuit, for controlling the open and close of electromechanical valve; Described microcomputer controller is also connected with communication module, for carrying out telecommunication by microcomputer controller by communication module and gas intelligent management system, by the table client information real-time Transmission of remote-control intelligent mass rate gas meter, flow meter to gas intelligent management system, and receive the instruction that gas intelligent management system issues; Mass rate processing module is at least comprised in described signal processing unit, described mass rate processing module accesses memory module and microcomputer controller respectively, for by mass rate processing module based on the mass flow calculation formula stored in memory module, digital temperature signal signal gathering unit collected converts digital quality information to; Described memory module also accesses microcomputer controller, for being revised the heat-conduction coefficient in mass flow calculation formula, meter constant, specific heat at constant pressure by microcomputer controller.
As preferably, further technical scheme is: described gas meter, flow meter also comprises temperature sensor C, and described temperature sensor C accesses microcomputer controller, for detecting ambient temperature by temperature sensor C, and current temperature value is transferred to microcomputer controller.
Further technical scheme is: described mass rate processing module is also for correcting the temperature difference in formula according to the graph of errors of the parameter to environment temperature and each sampling; Simulating signal amplification module and A/D analog-to-digital conversion module is also provided with between described mass rate processing module and signal gathering unit; Described microcomputer controller is built-in with the correction table of comparisons, is revised the heat-conduction coefficient in mass flow calculation formula, meter constant, specific heat at constant pressure by described correction chart.
Further technical scheme is: described microcomputer controller also accesses storage unit, preset tolerance value is stored in described storage unit, for being deducted the preset tolerance value in storage unit according to digital quality information by microcomputer controller, when preset tolerance value is 0, close electromechanical valve by microcomputer controller by valve control circuit.
Further technical scheme is: described gas meter, flow meter also comprises under-voltage protecting circuit, power-off protecting circuit, high voltage protection circuit and flow current foldback circuit, under-voltage protecting circuit, power-off protecting circuit, high voltage protection circuit is connected with microcomputer controller respectively with flow current foldback circuit, for occurring that working power is under-voltage in the use procedure of remote-control intelligent mass rate gas meter, flow meter, power cut-off or replacing battery, there is high voltage, when gas flow is continued above the situation of target flow, by valve control circuit, electromechanical valve is completed to the operation of closing valve by microcomputer controller.
Further technical scheme is: described gas meter, flow meter also comprises acceleration transducer, for being shaken by acceleration transducer testing environment, when there is earthquake, sending the information detected to microcomputer controller, closing electromechanical valve by microcomputer controller by valve control circuit.
Further technical scheme is: described gas meter, flow meter also comprises power sense circuit, power sense circuit one end is connected with the feed circuit carrying out powering for each module of gas meter, flow meter, the other end is connected with microcomputer controller, for detecting the time of supplying cell voltage and distance predicted life, and by power source life information transmission to microcomputer controller; Described gas meter, flow meter also comprises display and alarm, display and alarm are connected on microcomputer controller, described display is for showing metrical information, control information and management information, described metrical information comprises the information such as gas instantaneous delivery, accumulative gas flow, control information comprises the information such as valve control information, and management information comprises the information such as valve state information, charging information; Described alarm is for completing the alarm operation of gas meter, flow meter table end.
Further technical scheme is: described gas meter, flow meter comprises the draft tube, escape pipe and the display that are tightly connected with electric resistance welding joint respectively, and described display is arranged on outside gas meter, flow meter, is provided with electromechanical valve in draft tube; The inside of described gas meter, flow meter is also provided with the shunt be connected with gas meter, flow meter internal cavity, the inside of described shunt is also provided with multiple air-flow rectilinear duct, the inlet end of described shunt is also provided with radome fairing, an air-flow rectilinear duct of described splitter overhead, as measurement runner, is provided with micro electronmechanical metering units in described measurement runner; Described micro electronmechanical metering units comprises temperature sensor A, temperature sensor B and micro-heater, described temperature sensor A, temperature sensor B and micro-heater are installed in the near middle of described measurement runner, and described temperature sensor A is connected with the signals collecting end of signal gathering unit respectively with the signal output part of temperature sensor B.
Further technical scheme is: the outlet side of described escape pipe is also provided with anti-backflow device, and for when adverse current appears in combustion gas, anti-backflow device closes escape pipe under self gravitation and the acting in conjunction of counter-current gas pressure.
The present invention additionally provides a kind of remote-control intelligent mass rate gas meter, flow meter management system on the other hand, described system comprises multiple above-mentioned remote-control intelligent mass rate gas meter, flow meter and gas intelligent management system, described multiple remote-control intelligent mass rate gas meter, flow meter all accesses gas intelligent management system, for carrying out two-way communication by between remote-control intelligent mass rate gas meter, flow meter and gas intelligent management system; Described gas intelligent management system comprises: service management module, for realizing opening an account, hair fastener, pay the fees, move back expense, change table, transfer, cancellation is checked meter and blacklist manages; Basic data module, for realizing, website is arranged, region is arranged, table type is arranged, payment type is arranged, manufacturer is arranged; Remote supervision module, for realizing remote meter reading, remote valve control, remote alarms and telecommunication; Statement management module, for realize user basic information Report Server Management, subscriber payment information report management, user mend card information Report Server Management, daily sheet management, the moon Report Server Management, year Report Server Management; System setup module: for realizing Administrator, menu setting, password is arranged, invoice format is arranged, serial port setting.
Compared with prior art, part beneficial effect of the present invention is as follows:
(1) adopt mass flow metering principle, mechanical drive disk assembly, avoids the measurement problem that mechanical aging brings, ensure that measuring accuracy.
(2) reach temperature adjustmemt function with mass flow metering, need not carry out temperature and pressure compensation by external correcting device, whole table volume is little, and measuring accuracy is high, and reliability is strong.
(3) adopt integral structure, avoid installing additional the matching problem that attachment device causes, ensure that metering accuracy, and reduce production cost.
(4) be provided with the protection circuits such as under-voltage, power-off, high voltage, ensure that and use gas safety.
(5) in conjunction with telecommunication technique, achieve remote meter reading, remote recharge, long-range ladder gas price, remote valve control and remote alarms, be convenient to remote fuel gas intelligent management and long-distance intelligent control, improve service and the efficiency of civil gas management, ensure that combustion gas gas safety.
(6) anti-backflow device is equipped with escape pipe, can when gas meter is anti-loaded anti-gas reversed flow, or prevent negative pressure to be mixed into air when stopping the supple of gas or steam.
(7) sprue inlet end is equipped with radome fairing, and sprue, built with shunt, ensures that combustion gas is flowed uniformly in pipeline, improves measuring accuracy.
(8) draft tube and escape pipe are provided separately, even if Long-Time Service, the impurity be mixed in combustion gas also can be deposited on the downside of watchcase, effectively avoids impurity buildups in pipeline, ensure gas metering accuracy.
Accompanying drawing explanation
Fig. 1 is the structured flowchart for illustration of one embodiment of the invention;
Fig. 2 is the structured flowchart for illustration of the signal processing unit in one embodiment of the invention;
Fig. 3 is for illustration of the microcomputer controller functional block diagram in one embodiment of the invention;
Fig. 4 is for illustration of the table end intelligent control function block diagram in one embodiment of the invention;
Fig. 5 is the structural representation for illustration of another embodiment of the present invention;
Fig. 6 is the structured flowchart for illustration of another embodiment of the present invention;
Fig. 7 is for illustration of the gas intelligent management system block diagram in another embodiment of the present invention;
In figure, 1 be electric resistance welding joint, 2 be barrel cover, 3 be watch shell, 4 be electromechanical valve, 5 be radome fairing, 6 be shunt, 7 be micro electronmechanical metering units, 8 be sprue for measuring runner, 9,10 be escape pipe, 11 be display, 12 be main circuit board, 13 be radio-frequency antenna, 14 for inquiry switch, 15 be anti-backflow device, 16 for draft tube.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further elaborated.
Shown in figure 1, one embodiment of the present of invention are a kind of remote-control intelligent mass rate gas meter, flow meters, and this gas meter, flow meter comprises microcomputer controller, micro electronmechanical metering units, valve control circuit and communication module; As shown, aforesaid micro electronmechanical metering units successively by signal gathering unit, signal processing unit access microcomputer controller, for by signal processing unit by digital quality information transmission to microcomputer controller; Wherein microcomputer controller is connected with electromechanical valve by valve control circuit, for controlling the open and close of electromechanical valve; Aforementioned microcomputer controller is also connected with communication module, for carrying out telecommunication by microcomputer controller by communication module and gas intelligent management system, by the table client information real-time Transmission of remote-control intelligent mass rate gas meter, flow meter to gas intelligent management system, and receive the instruction that gas intelligent management system issues; Technological means even more important in the present embodiment is:
Shown in composition graphs 2, at least need in above-mentioned signal processing unit to comprise mass rate processing module, this mass rate processing module accesses memory module and above-mentioned microcomputer controller respectively, for by mass rate processing module based on the mass flow calculation formula stored in memory module, temperature signal signal gathering unit collected converts digital quality information to; Simultaneously, the artificial accuracy ensureing digital quality information of invention, improve the degree of accuracy that gas meter, flow meter carries out mass flow metering, also by above-mentioned memory module access microcomputer controller, for being revised the heat-conduction coefficient in mass flow calculation formula, meter constant, specific heat at constant pressure by microcomputer controller.
Above-mentioned microcomputer controller can the built-in correction table of comparisons, is revised the heat-conduction coefficient in mass flow calculation formula, meter constant, specific heat at constant pressure by described correction chart.
Mass rate processing module can to memory module stored in information such as continuous datas, and various parameter preset can be taken out from memory module, required algorithm and coefficient when described parameter preset comprises the computing of mass rate processing module, as mass flow calculation formula, combustion gas reduction coefficient, temperature etc.
In the present embodiment, the above-mentioned mass flow calculation formula mentioned is as follows:
In above formula, Δ T is the temperature difference, and K is meter constant, and A is the heat-conduction coefficient of well heater and surrounding environment heat interchange, C
pfor the specific heat at constant pressure of tested gas, the heat of Q upstream toward downstream conduction;
Shown in figure 5, in another embodiment of the invention, the structure of inventor to above-mentioned gas meter, flow meter has done further optimal design-aside, be specially this gas meter, flow meter and comprise the draft tube 16, escape pipe 10 and the display 11 that are tightly connected with electric resistance welding joint 1 respectively, display 11 is arranged on outside gas meter, flow meter, and in draft tube 16, electromechanical valve 4 is installed; Wherein the inside of gas meter, flow meter is also provided with the shunt 6 be connected with gas meter, flow meter internal cavity, the inside of this shunt 6 is also provided with multiple air-flow rectilinear duct, and set up radome fairing 5 at the inlet end of shunt 6, and using an air-flow rectilinear duct at shunt 6 top as measurement runner, in described measurement runner, micro electronmechanical metering units 7 is installed;
According to above-described embodiment, temperature sensor A, temperature sensor B and micro-heater is provided with in above-mentioned micro electronmechanical metering units 7, temperature sensor A, temperature sensor B and micro-heater are installed in the near middle of described measurement runner, described temperature sensor A is connected with the signals collecting end of signal gathering unit respectively with the signal output part of temperature sensor B.Based on gas meter, flow meter structure above-mentioned in the present embodiment, the process drawn of above-mentioned mass flow calculation formula is as follows:
First combustion gas quality flow metering principle is introduced: combustion gas flows into draft tube 16 from gas meter, flow meter air intake opening, then to be led air-flow rectilinear duct by radome fairing 5, the total combustion gas entering combustion gas and other air-flow rectilinear duct measuring runner 8 is proportional, and the gas flow that order is measured in runner is q
mentering the total gas flow rate measuring runner and other air-flow rectilinear duct is q, in measurement runner, gas flow accounts for the ratio of total gas flow rate q is a split ratio constant C, by the structures shape of escape pipe 10 own, (split ratio C realizes automatic calibration at different flow point to split ratio constant C, guarantee that metering precisely), then q=q
m/ C, q
mdrawn by following computing method:
Temperature difference T is measured by micro-heater upstream and downstream symmetrically arranged temperature sensor A and temperature sensor B, then from the heat Q=K × A × Δ T of upstream toward downstream conduction, wherein, K is meter constant, A is the heat-conduction coefficient of well heater and surrounding environment heat interchange, and these origin of heat are in the flowing of air-flow.The heat that air-flow brings is q
m× C
p, wherein C
pfor the specific heat at constant pressure of tested gas, equal according to the two, i.e. K × A × Δ T=q
m× C
p, can draw:
therefore, by measuring temperature difference T, the mass rate of tested combustion gas can be calculated.
Based on above-mentioned mass flow calculation formulae discovery mode, it is specific as follows that the heat-conduction coefficient that microcomputer controller carries out, meter constant, specific heat at constant pressure carry out correction:
It is relevant with gas componant that mass rate processing module calculates the heat-conduction coefficient used; The heat that mass rate processing module is transmitted in temperature changing process, is revised the heat-conduction coefficient in mass flow calculation formula by the corresponding different gas componant of microcomputer controller.
It is relevant that mass rate processing module calculates meter constant and the measurement gas flow shunt ratio, the pipeline configuration that use; Actual pipeline configuration has different, is corrected the meter constant in mass flow calculation formula by the corresponding difference of microcomputer controller.
It is relevant that mass rate processing module calculates specific heat at constant pressure and the gas temperature, the gas componant that use; Gas componant is used to correct the specific heat at constant pressure in mass flow calculation formula by microcomputer controller according to gas temperature and various places.
Before the correction that above-mentioned microcomputer controller carries out the parameters in formula, inventor also with reference to prior art, utilizes mass rate processing module to revise first above-mentioned heat-conduction coefficient, meter constant, specific heat at constant pressure, specific as follows:
There is according to instrument design itself situation of differentiation in certain limit, mass rate processing module in a storage module can stored in meter constant characteristic correction table, after using the atmospheric pressure of client locality, peripheral environment, instrument to work long hours according to reality, instrument parameter has different to change, and mass rate processing module corrects according to these characteristics.
The situation that mass rate processing module uses natural gas density inconsistent according to user area, incorporate air pressure density and external pressure the change of divergence constant table of corrections in a storage module, mass rate processing module carries out specific heat at constant pressure parameter correction can carry out contrast confirmation after multiple repairing weld after.After correcting, parameter puts into memory module.
Shown in Fig. 1, in the embodiment that the present invention is more preferably for technical solution problem, the artificial error rate reducing the metering of mass rate gas meter, flow meter further of invention, promote microcomputer controller deducts preset tolerance value accuracy according to metric results, on the basis of above-described embodiment gas meter, flow meter structure, set up temperature sensor C, temperature sensor C is accessed microcomputer controller, for detecting ambient temperature by temperature sensor C, and current temperature value is transferred to microcomputer controller, then be sent to memory module by microcomputer controller.
Thus mass rate processing module also can be corrected based on the graph of errors of the temperature value in memory module to environment temperature and each parameter of sampling, specific as follows:
Environment temperature corrects: according to sensor characteristic, mass rate processing module is sampled for temperature sensor A and temperature sensor B two sensors respectively, sampling carries out Linear Amplifer for temperature sensor A and temperature sensor B two sensors simultaneously respectively, then be again superimposed while amplifying signal being exported and carry out homophase amplification, when sampling, A and B two sensors reality are still carrying out heating process, mass rate processing module is according to the temperature value of current outside environment, utilize the temperature difference threshold range that current temperature value should be corresponding, the temperature gap at the whole story of the temperature variation of A and B two temperature sensors is corrected, ensure the accuracy of above-mentioned formulae discovery.
Graph of errors corrects: mass rate processing module carries out data sampling according to Millisecond is per second, hundredths after sampled data identification radix point, the mode of carrying out rounding up for thousand points of positions after radix point carries out graph of errors correction, be conducive to carrying out linearization process, each sampling is all a level digital, a sampling curve is just had out for multiple repairing weld, adopting within the scope of 1V ~ 3V can be a sampling curve, it is also a sampling curve within the scope of 3V ~ 5V, it is also in like manner a sampling curve within the scope of 1V ~ 5V, mass rate processing module carries out certain correction for this sampling curve.
In addition, microcomputer controller also carries out secondary correction by method similar to the above to the graph of errors of digital quality information and environment temperature, to promote digital quality information accuracy further.
Further, inventor also with reference to prior art, for realizing analog-to-digital circuit structure in signal processing unit, has also set up simulating signal amplification module and A/D analog-to-digital conversion module between mass rate processing module and signal gathering unit.
On the other hand, based on the conventional structure of intelligent gas meter, also above-mentioned microcomputer controller can be accessed storage unit again, preset tolerance value (i.e. user supplement with money gas quantity) is stored in this storage unit, for being deducted the preset tolerance value in storage unit according to digital quality information by microcomputer controller, when preset tolerance value is 0, close electromechanical valve by microcomputer controller by valve control circuit.
Still with reference to shown in figure 1, in another embodiment of the invention, for promoting the security that combustion gas uses further, also can set up under-voltage protecting circuit in above-mentioned gas meter, flow meter, power-off protecting circuit, high voltage protection circuit and flow current foldback circuit, under-voltage protecting circuit, power-off protecting circuit, high voltage protection circuit is connected with microcomputer controller respectively with flow current foldback circuit, for occurring that working power is under-voltage in the use procedure of remote-control intelligent mass rate gas meter, flow meter, power cut-off or replacing battery, there is high voltage, when gas flow is continued above the situation of target flow, by valve control circuit, electromechanical valve is completed to the operation of closing valve by microcomputer controller.In addition, also can set up acceleration transducer in gas meter, flow meter, for being shaken by acceleration transducer testing environment, when there is earthquake, send the information detected to microcomputer controller, closing electromechanical valve by microcomputer controller by valve control circuit.
Preferably, above-mentioned communication module can adopt any one and other radio-frequency communication module in GSM message module, GPRS module, ZigBee module, low-frequency wireless signals module, LoRa wireless module, infrared transceiver module, Ethernet wireless module, or RS485 communication module, M-BUS communication module, power line carrier, PLC module any one wire transmission module.
Further, for ensureing the stability of gas meter, flow meter power supply, also power sense circuit can be set up in above-mentioned gas meter, flow meter, power sense circuit one end is connected with the feed circuit carrying out powering for each module of gas meter, flow meter, the other end is connected with microcomputer controller, for detecting the time of supplying cell voltage and distance predicted life, and by power source life information transmission to microcomputer controller;
Further, above-mentioned gas meter, flow meter also comprises display and alarm, display and alarm are connected on microcomputer controller, described display is for showing metrical information, control information and management information, described metrical information comprises the information such as gas instantaneous delivery, accumulative gas flow, control information comprises the information such as valve control information, and management information comprises the information such as valve state information, charging information; Described alarm is for completing the alarm operation of gas meter, flow meter table end.
More preferably, gas reversed flow is there is for preventing the escape pipe 10 of above-mentioned gas meter, flow meter, or prevent negative pressure to be mixed into air when stopping the supple of gas or steam, also in the outlet side of escape pipe 10, anti-backflow device 15 can be installed, for when adverse current appears in combustion gas, anti-backflow device 15 closes escape pipe 10 under self gravitation and the acting in conjunction of counter-current gas pressure.
Shown in figure 3, the difference in functionality that above-mentioned microcomputer controller performs at table end according to it, is broadly divided into intelligent metering administration module, remote-control intelligent administration module and digital quality message processing module, wherein:
Digital quality message processing module: for realizing the function of the storage of digital quality information, graph of errors correction, environment temperature correction, the correction of meter constant characteristic correction, specific heat at constant pressure, the process of mass metrology informix.As mentioned here above, the storage of digital quality information refers to the storage to correlation parameters such as temperature contrast parameter correction, meter constant corrections.It is correct for each design parameter of sampling that graph of errors corrects.It is correct for the temperature contrast of environment for use that environment temperature corrects.Meter constant characteristic correction be for Instrument use environment, pressure, work long hours after parameter differences correct.Specific heat at constant pressure corrects and refers to that the specific heat at constant pressure parameter differences of tested gas corrects.The process of mass metrology informix refers to overall treatment after temperature, instrument, pressure and other parameters Integral correction.
Shown in composition graphs 4, remote-control intelligent manages: for the function realizing long-distance intelligent management, table holds Based Intelligent Control and telecommunication administration.Long-distance intelligent management function specifically comprises the functions such as real time remote is supplemented with money, real time remote price modification, in real time ladder gas price, the control of real time remote valve, Electric Remote Meter Reading.Table end intelligent control function specifically comprises 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, optimum configurations, undervoltage warning prompting, power down turn-off protection, Valve controlling, zero tolerance turns off, tolerance is reported to the police, screen display controls, supplement display with money, power on the functions such as display.Telecommunication administration function specifically comprises to be waken management, bubbling control, frequency modulation management, double-channel management, sensitivity up and preferably, with frequency difference divides management, broadcast communication management, three-layer network management, concentrator management, repeater management, hand-held set to manage the functions such as GPRS management.
Intelligent metering manages: for realizing mass flow metering, metrical information storages, metrical information real-time report, metrical information instruction report, measure overtime protection, the functions such as real-time ladder gas price, consumption curve record held by metering overcurrent protection, table.
Wherein, the combustion gas of remote-control intelligent mass rate also comprises reset circuit and enquiry circuit, and reset switch connects microcomputer controller by reset circuit, can carry out safety reset by reset switch to gas meter, flow meter; Inquiry switch is connected to microcomputer controller by enquiry circuit, can Automatic inquirying gas meter, flow meter relevant information by inquiry switch, as gas metering information, control information, civil gas management information etc.
Shown in figure 6, an alternative embodiment of the invention is a kind of remote-control intelligent mass rate gas meter, flow meter management system, this system comprises remote-control intelligent mass rate gas meter, flow meter in multiple above-described embodiment and gas intelligent management system, multiple remote-control intelligent mass rate gas meter, flow meter all accesses gas intelligent management system, for carrying out two-way communication by between remote-control intelligent mass rate gas meter, flow meter and gas intelligent management system; Aforesaid multiple remote-control intelligent gas meter is preferably by multistage communication device access gas intelligent management system, and multistage communication device can adopt the combination of repeater and concentrator, but is not limited to this type of; Shown in composition graphs 7, above-mentioned gas intelligent management system comprises:
Service management module, for realizing opening an account, hair fastener, pay the fees, move back expense, change table, transfer, cancellation is checked meter and blacklist manages;
Basic data module, for realizing, website is arranged, region is arranged, table type is arranged, payment type is arranged, manufacturer is arranged;
Remote supervision module, for realizing remote meter reading, remote valve control, remote alarms and telecommunication; Remote meter-reading function specifically comprise long-rangely to open an account, the inquiry of remote recharge, remote status, long-range price modification, long-range ladder gas price, the function such as long-range cancellation; The function such as warning and gas leakage warning that remote alarming function specifically comprises over voltage alarm, undervoltage warning, metering overcurrent is reported to the police, Sorry, your ticket has not enough value.
Statement management module, for realize user basic information Report Server Management, subscriber payment information report management, user mend card information Report Server Management, daily sheet management, the moon Report Server Management, year Report Server Management;
System setup module: for realizing Administrator, menu setting, password is arranged, invoice format is arranged, serial port setting.
Than that described above, also it should be noted that spoken of in this manual " embodiment ", " another embodiment ", " embodiment " etc., refer to the specific features, structure or the feature that describe in conjunction with this embodiment and be included at least one embodiment of the application's generality description.Multiple place occurs that statement of the same race is not necessarily refer to same embodiment in the description.Furthermore, when describing specific features, structure or a feature in conjunction with any embodiment, what advocate is also fall within the scope of the invention to realize this feature, structure or feature in conjunction with other embodiments.
Although with reference to multiple explanatory embodiment of the present invention, invention has been described here, but, should be appreciated that, those skilled in the art can design a lot of other amendment and embodiment, these amendments and embodiment will drop within spirit disclosed in the present application and spirit.More particularly, in the scope of, accompanying drawing open in the application and claim, multiple modification and improvement can be carried out to the building block of subject combination layout and/or layout.Except the modification of carrying out building block and/or layout is with except improvement, to those skilled in the art, other purposes also will be obvious.
Claims (10)
1. a remote-control intelligent mass rate gas meter, flow meter, it is characterized in that: described gas meter, flow meter comprises microcomputer controller, micro electronmechanical metering units, valve control circuit and communication module, described micro electronmechanical metering units successively by signal gathering unit, signal processing unit access microcomputer controller, for by signal processing unit by digital quality information transmission to microcomputer controller; Described microcomputer controller is connected with electromechanical valve by valve control circuit, for controlling the open and close of electromechanical valve; Described microcomputer controller is also connected with communication module, for carrying out telecommunication by microcomputer controller by communication module and gas intelligent management system, by the table client information real-time Transmission of remote-control intelligent mass rate gas meter, flow meter to gas intelligent management system, and receive the instruction that gas intelligent management system issues;
Mass rate processing module is at least comprised in described signal processing unit, described mass rate processing module accesses memory module and microcomputer controller respectively, for by mass rate processing module based on the mass flow calculation formula stored in memory module, temperature signal signal gathering unit collected converts digital quality information to; Described memory module also accesses microcomputer controller, for being revised the heat-conduction coefficient in mass flow calculation formula, meter constant, specific heat at constant pressure by microcomputer controller.
2. remote-control intelligent mass rate gas meter, flow meter according to claim 1, it is characterized in that: described gas meter, flow meter also comprises temperature sensor C, described temperature sensor C accesses microcomputer controller, for detecting ambient temperature by temperature sensor C, and current temperature value is transferred to microcomputer controller.
3. remote-control intelligent mass rate gas meter, flow meter according to claim 2, is characterized in that: described mass rate processing module is also for correcting the temperature difference in formula according to the graph of errors of the parameter to environment temperature and each sampling; Simulating signal amplification module and A/D analog-to-digital conversion module is also provided with between described mass rate processing module and signal gathering unit; Described microcomputer controller is built-in with the correction table of comparisons, is revised the heat-conduction coefficient in mass flow calculation formula, meter constant, specific heat at constant pressure by described correction chart.
4. the remote-control intelligent mass rate gas meter, flow meter according to claim 1 or 3, it is characterized in that: described microcomputer controller also accesses storage unit, preset tolerance value is stored in described storage unit, for being deducted the preset tolerance value in storage unit according to digital quality information by microcomputer controller, when preset tolerance value is 0, close electromechanical valve by microcomputer controller by valve control circuit.
5. the remote-control intelligent mass rate gas meter, flow meter according to claim 1 or 3, it is characterized in that: described gas meter, flow meter also comprises under-voltage protecting circuit, power-off protecting circuit, high voltage protection circuit and flow current foldback circuit, under-voltage protecting circuit, power-off protecting circuit, high voltage protection circuit is connected with microcomputer controller respectively with flow current foldback circuit, for occurring that working power is under-voltage in the use procedure of remote-control intelligent mass rate gas meter, flow meter, power cut-off or replacing battery, there is high voltage, when gas flow is continued above the situation of target flow, by valve control circuit, electromechanical valve is completed to the operation of closing valve by microcomputer controller.
6. the remote-control intelligent mass rate gas meter, flow meter according to claim 1 or 3, it is characterized in that: described gas meter, flow meter also comprises acceleration transducer, for being shaken by acceleration transducer testing environment, when there is earthquake, send the information detected to microcomputer controller, close electromechanical valve by microcomputer controller by valve control circuit.
7. the remote-control intelligent mass rate gas meter, flow meter according to claim 1 or 3, it is characterized in that: described gas meter, flow meter also comprises power sense circuit, power sense circuit one end is connected with the feed circuit carrying out powering for each module of gas meter, flow meter, the other end is connected with microcomputer controller, for detecting the time of supplying cell voltage and distance predicted life, and by power source life information transmission to microcomputer controller;
Described gas meter, flow meter also comprises display and alarm, display and alarm are connected on microcomputer controller, described display is for showing metrical information, control information and management information, described metrical information comprises the information such as gas instantaneous delivery, accumulative gas flow, control information comprises the information such as valve control information, and management information comprises the information such as valve state information, charging information; Described alarm is for completing the alarm operation of gas meter, flow meter table end.
8. remote-control intelligent mass rate gas meter, flow meter according to claim 1, it is characterized in that: described gas meter, flow meter comprises the draft tube (16), escape pipe (10) and the display (11) that are tightly connected with electric resistance welding joint (1) respectively, described display (11) is arranged on outside gas meter, flow meter, is provided with electromechanical valve (4) in draft tube (16); The inside of described gas meter, flow meter is also provided with the shunt (6) be connected with gas meter, flow meter internal cavity, the inside of described shunt (6) is also provided with multiple air-flow rectilinear duct, the inlet end of described shunt (6) is also provided with radome fairing (5), an air-flow rectilinear duct at described shunt (6) top, as measurement runner, is provided with micro electronmechanical metering units (7) in described measurement runner;
Described micro electronmechanical metering units (7) comprises temperature sensor A, temperature sensor B and micro-heater, described temperature sensor A, temperature sensor B and micro-heater are installed in the near middle of described measurement runner, and described temperature sensor A is connected with the signals collecting end of signal gathering unit respectively with the signal output part of temperature sensor B.
9. remote-control intelligent mass rate gas meter, flow meter according to claim 1, it is characterized in that: the outlet side of described escape pipe (10) is also provided with anti-backflow device (15), for when adverse current appears in combustion gas, anti-backflow device (15) closes escape pipe (10) under self gravitation and the acting in conjunction of counter-current gas pressure.
10. a remote-control intelligent mass rate gas meter, flow meter management system, it is characterized in that: described system comprises remote-control intelligent mass rate gas meter, flow meter described in multiple claim 1 to 9 any one and gas intelligent management system, described multiple remote-control intelligent mass rate gas meter, flow meter all accesses gas intelligent management system, for carrying out two-way communication by between remote-control intelligent mass rate gas meter, flow meter and gas intelligent management system; Described gas intelligent management system comprises:
Service management module, for realizing opening an account, hair fastener, pay the fees, move back expense, change table, transfer, cancellation is checked meter and blacklist manages;
Basic data module, for realizing, website is arranged, region is arranged, table type is arranged, payment type is arranged, manufacturer is arranged;
Remote supervision module, for realizing remote meter reading, remote valve control, remote alarms and telecommunication;
Statement management module, for realize user basic information Report Server Management, subscriber payment information report management, user mend card information Report Server Management, daily sheet management, the moon Report Server Management, year Report Server Management;
System setup module: for realizing Administrator, menu setting, password is arranged, invoice format is arranged, serial port setting.
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