CN201060514Y - Three-phase smart card type electric energy meter for farm irrigation - Google Patents
Three-phase smart card type electric energy meter for farm irrigation Download PDFInfo
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- CN201060514Y CN201060514Y CNU2007200213910U CN200720021391U CN201060514Y CN 201060514 Y CN201060514 Y CN 201060514Y CN U2007200213910 U CNU2007200213910 U CN U2007200213910U CN 200720021391 U CN200720021391 U CN 200720021391U CN 201060514 Y CN201060514 Y CN 201060514Y
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Abstract
The utility model discloses a three-phase smartcard electrical energy meter which is used for agricultural irrigation, and consists of a power supply which supplies electricity to electronic components of the system; a micro controller, the signal input end of the micro controller is communicated with a computation circuit module and a phase breaking alarm module; an intelligent CPU card which is interacted with the micro controller; and an SAM module which serves as a storage unit. The utility model can carry on the measurement of forward/reverse electrical energy under such circs as three-phase three-line, three-phase four-line big electric current or small electric current; on the other hand, users can share a charging meter for irrigation via the technologies of a meter with cards and a card with meters; and also, one user can use the card on a plurality of meters. The experiment shows that the utility model can improve the efficiency of electric use for the agricultural irrigation.
Description
Technical field
The utility model relates to measuring instrument technology and the field irrigation power consuming administrative system field in the electric power meter, relates in particular to the electricity consumption intelligent mode of the many cards of a table, a card multilist.
Background technology
Along with the carrying out of the upgrade of rural power grids and the rural electricity consumption reform of management system, the modernization of rural electricity consumption management has been irresistible trend, and agricultural irrigation realizes that as the part in the agricultural production electricity consumption its automatic management will have good market outlook.Field irrigation at present is most of inevitably to exist bad behaviors such as stealing, arrearage, electric tyrant still by counting cost by gas meter or metered, also exists electricity use based on human relationships, connection-related electricity use.
The utility model content
Technical problem to be solved in the utility model provide a kind of peasant of realization hold electricity consumption, make things convenient for the three-phase intelligent cassette farming of electricity consumption accounting management to irritate to use electric energy meter.
For solving the problems of the technologies described above, the technical solution of the utility model is: the farming of three-phase intelligent cassette is irritated and is used electric energy meter, be included as the power supply of each electron device power supply of system, microcontroller, the signal input part of described microcontroller is electrically connected metering circuit module, phase breaking alarm module respectively, carry out the intelligent CPU card of interactive communicate with described microcontroller, as the SAM module of storage unit, display module and pilot relay module that the signal output part of described microcontroller is electrically connected, wherein:
Described metering circuit module comprises A phase metering module, B phase metering module, C phase metering module; A phase metering module comprises the phase current sensor, the signal amplifier that is connected with described phase current sensor electrical, the A/D converter that is electrically connected with described signal amplifier, the digital filter that is electrically connected with described A/D converter, the power calculator that is electrically connected with described digital filter; Described A phase metering module also comprises the phase voltage sensor, the signal amplifier that is connected with described phase voltage sensor electrical, the A/D converter that is electrically connected with described signal amplifier, the digital filter that is electrically connected with described A/D converter, the power calculator that is electrically connected with described digital filter; Described B phase metering module is identical with the circuit of A phase metering module with C phase metering module, and described A phase metering module, B phase metering module and C metering module power calculator separately mutually are electrically connected to common totalizer, described totalizer is electrically connected the output pulses modular converter, this pulse signal is through frequency divider, one the tunnel is used for pulse indication and verification, and one the tunnel is used to drive number device and single-chip microcomputer calculating electric energy;
Described power module comprises the identical A phase transformer of parameter, B phase transformer and C phase transformer, the secondary of described A phase transformer, B phase transformer and C phase transformer wherein between two taps respectively by compiling after the full-wave rectification, again by the resistance-capacitance depressurization voltage stabilizing, obtain microcontroller power supply+5V by voltage stabilizer, filter circuit of pressure-stabilizing at last, before voltage stabilizer, also extracted simultaneously the detection power supply of a 12V out, in order to detect power supply, this detection power supply is input to watchdog circuit, and house dog sends reset signal and gives microcontroller; Three-phase transformer former limit tap and simulation ground obtain measuring power Vcc and negative supply Vss by three phase full wave rectification, capacitance voltage stabilizing circuit and voltage stabilizer jointly;
Described phase breaking alarm module comprises takes a sample respectively in the former limit of A phase transformer, B phase transformer and C phase transformer centre tap, described three former limit centre taps obtain power supply phase shortage indicator signal by electric resistance partial pressure respectively, i.e. A phase, B phase and C phase failure signal mutually; And corresponding pilot lamp extinguishes when the phase failure;
Described CPU card and SAM module all are the E that has microprocessor
2PROM, its inner mask has operating system TIMECOS2.0, and adopts the des encryption method, revises key among the security authentication module SAM by key card.
As a kind of improvement, described intelligent CPU cartoon crosses deck and microcontroller is electrically connected, and a pair of normally opened contact is arranged on the deck, when the CPU card inserts, and this normally opened contact closure.
Owing to adopted technique scheme, can carry out the forward and reverse electric energy metrical under the various situations such as phase three-wire three, the big electric current of three-phase and four-line, little electric current; On the other hand, realize that by the many cards of a table, a card multilist technology a plurality of users can irrigate charging, also can a user use with same table on many tables.Evidence, the utility model can improve the power consumption efficiency of agricultural irrigation.
Description of drawings
Fig. 1 is electric energy metrical of the present utility model and indicating section theory diagram;
Fig. 2 is power supply of the present utility model and power management part theory diagram;
Fig. 3 is a microcontroller intelligent control part theory diagram of the present utility model;
Fig. 4 is an intelligent storage unit SAM functions of modules theory diagram of the present utility model;
Fig. 5 is card of the present utility model and microcontroller interface schematic block circuit diagram;
Fig. 6 is a charactron display circuit theory diagram of the present utility model.
Embodiment
The integral body of present embodiment is formed and is divided main element and optional feature, and main element is an electric energy meter itself, and the closed shell packing is arranged, and fixed orifice is arranged on the drain pan; Optional feature is an earth leakage protective device, earth leakage protective device be outer be connected on behind the table in order to disconnect motor.Main element is divided into power module, metering module, single-chip microcomputer intelligent control module, display module, card and SAM module etc. again according to function.Wherein power module is for complete machine provides different power supplys, is independent of each other between the power supply; Metering module is to utilize special-purpose electric energy computation chip to realize the metering of electric flux by the electric current and voltage sampling microwave network; Single-chip computerized intelligent pattern is to realize functions such as data processing, information transmission, pre-payment; Display module is to show dump energy, plug-in card information etc.; Card is to realize sending mutually of card internal information and internal information of statement with the SAM module, must be through key authentication before sending mutually.Below in conjunction with each schematic diagram of the function is the narration of this electric energy meter course of work.
Fig. 1 is the electric energy metrical part schematic diagram of the utility model electric energy meter, wherein resistance pressure-dividing network is by series resistance voltage signal to be adjusted to the input reference signal that computation chip needs, gain in chip then amplification, analog to digital conversion are delivered to counter then; Simultaneously voltage sampling circuit also is provided with short circuit part resistance and realizes adjustment to error in dipping.The current transformer current sampling is that the electric current that will enter from phase line converts current signal to voltage signal by external load resistance, will deliver to counter after this signal process gain amplification, the analog to digital conversion then.Counter obtains representing the value of active power representing two voltage signal values of load current and load voltage to multiply each other; The three phases active power value adds up and obtains total active power, through the output pulses conversion, the active power value is converted to the pulse train that is directly proportional with it again, and one the tunnel is positive negative pulse stuffing, and one the tunnel is positive pulse, can gather positive negative pulse stuffing as required, also can gather positive pulse.The utility model has been gathered positive pulse, no matter promptly power direction is all exported positive pulse, this pulse signal is through frequency divider, and one the tunnel is used for pulse indication and verification, and one the tunnel is used for actuation counter and single-chip microcomputer calculating electric energy.The utility model promptly has counter indication power consumption, has charactron to show electric weight again; Counter indication be all users' of this village wastage in bulk or weight electric weight, be active user's dump energy and six charactrons show, be with a decimal.The advantage of this metering circuit is high precision, high reliability, wide load, low-power consumption, graph of errors is straight, energy-saving material-saving etc.
Fig. 2 is power supply of the present utility model and power management part schematic diagram, wherein three-phase transformer former limit tap 2 and simulation ground 3 obtain measuring power Vcc and negative supply Vss by three phase full wave rectification, capacitance voltage stabilizing circuit and voltage stabilizer jointly, also utilize tap 2 to obtain power supply phase shortage indicator signal simultaneously by electric resistance partial pressure, be A phase, B phase and C phase failure signal mutually, and indicate by light emitting diode; Earlier by full-wave rectification, by capacitance voltage stabilizing, obtain microcontroller power supply+5V by voltage stabilizer at last again between the secondary tap 4 and 5, i.e. digital power has also been extracted the detection power supply of a 12V simultaneously out, in order to detection power down and pilot relay before voltage stabilizer.Power management adopts special watchdog circuit, by detecting the 12V power supply, output VG feeding-dog signal or DD power down, RESET reset signal.Isolate mutually between the power supply, do not disturb mutually, effectively avoided the interference in the signalling channel, strengthened the immunity to interference of complete machine.
Fig. 3 is a microcontroller intelligent control part schematic diagram, and this is the core intelligence part in the complete machine.The function that it is realized mainly is:
(1) metrical pulse that collects is become electric energy by the pulse constant calculations of setting, and whenever walk five degree ammeters and all the data in the internal memory will be stored once in the SAM module, because SAM is a kind of intelligent E with CPU
2PROM, data are not easy to lose, and good confidentiality.
(2) pre paid functionality, promptly (being security authentication module, is a kind of intelligent E by CPU card, SAM module
2PROM, structure principle chart is seen Fig. 5) and matching used with it electricity-selling system carries out the electric weight forward purchasing or the electricity charge are advance; In data transfer, carry out ammeter authentication and electric weight authentication by microcontroller, if key is not right, then refusal reads or writes data, and all data are all passed through des encryption, security and confidentiality are very good, and this also is the exclusive patented technology of our product (patent No. 01261220.0).
Many cards of (3) one tables and a card multilist function, it is distinguished with a common maximum of blocking a tabular form prepayment meter and is: in certain zone, same subscriber card can use on different tables, and same table also can be recognized the card of this village's different user; And after the user purchases once electricity,, can use repeatedly as long as dump energy is non-vanishing.Be that subscriber card can electricity consumption after in the insertion table, must insert once again after using up electricity, just can make the table outage, active user's dump energy is returned write on the card simultaneously, use so that continue next time.The utlity model has the data readback function, promptly after the correct reading of data of ammeter in the electricity card insertion table, dump energy retaking of a year or grade in the table can be convenient to power supply department and user and be carried out the information transmission in the electricity card, protection supplies, electricity consumption both sides' interests.The electricity card is provided with different password by power supply department to different zones as fractional currency simultaneously, has guaranteed that user's electricity card can only use within the limits prescribed.
(4) phase failure measuring ability by the special detection circuit, carries out phase failure detection and warning, prevents that the phase failure from burning out motor, A, B, the C three-phase pressure loss pilot lamp of correspondence on the three-phase and four-line table nameplate, and corresponding pilot lamp extinguishes when the voltage phase shortage; AB, the BC phase decompression pilot lamp of correspondence on the phase three-wire three table nameplate, corresponding pilot lamp extinguishes when the voltage phase shortage.
(5) relay control function; control relay circuit is very simple; mainly form by a triode, resistance and control power supply; if microcontroller detects alerting signal, overload, user and uses up and all can send a trip signal when electricity or electric weight are zero and come pilot relay to disconnect; thereby cut off the outside earth leakage protective device that connects, end user power utilization.
(6) data are preserved in power down, in Fig. 2 power supply and power management part schematic diagram, a power-off signal DD are arranged, and just open power-fail interrupt when microcontroller detects this power-off signal, and data are saved in the SAM module, and the back internal storage data that prevents to cut off the power supply is lost.
(7) charactron shows, circuit theory diagrams are seen Fig. 6, and display message has dump energy, plug-in card reaction information etc., and decimal of dump energy band shows that this is unique a table that can show the decimal electric weight in present intelligent card type electric energy meter.
Fig. 4 is intelligent storage unit SAM functions of modules schematic diagram, and the inner structure of CPU card all is the special E that has microprocessor CPU with the SAM module
2PROM, its inner mask has operating system TIMECOS2.0, and adopts the des encryption method, revises key among the security authentication module SAM by key card.When being provided with by function CPU card his-and-hers watches, as zero clearing, write pulse constant, have good luck, microcontroller is at first read key in the card and the key authentication among the SAM, if the key difference does not then respond the operation of card; Have only the key in the card just can operate with the key among the SAM is identical.Each power supply management department can be provided with the key of oneself, its user purchase key in the electricity card when identical with key among the SAM electric weight in the subscriber card just can be input in the table, otherwise ammeter will not receive, and has avoided greatly because of the premeditated random electric quantity loss that data cause that changes.
Fig. 5 is card and microcontroller interface circuit theory diagrams, and the CPU card is to realize and the interface of microcontroller that by deck a pair of normally opened contact is arranged on the deck, when the CPU card inserts, this normally opened contact closure produces a plug-in card look-at-me, and microcontroller begins response to interrupt.The Interrupt Process process is to power on, provide the card clock to card earlier, then card is resetted, and reads data in the card again, and data in will blocking and the comparison of the data among the SAM, if key authentication is not inconsistent, then closes interruption, no longer responds the operation of this card.The electricity card can reach more than 1000 times serviceable life, and the civil power that passes through in electricity card socket in the table and the table insulate fully, can guarantee the security the when user makes the electricity consumption card.
Fig. 6 is a charactron display circuit schematic diagram, and wherein charactron adopts 6 anode 8 segment code type LED altogether, selects whom shows that the information of demonstration has dump energy, plug-in card reaction information such as good, E100, E200 etc. by address scrambler; A decimal is with in the demonstration of dump energy, can give the user information about power more accurately.
In a word, three-phase intelligent cassette described in the utility model farming irritate with electric energy meter promptly realized electronic metering, again realized pre paid functionality, simultaneously also satisfy a card multilist and (or) the many card requests of a table.Shell adopts totally-enclosed design, the ammeter overall appearance, and its technical feature and multi-user's function are all considerably beyond traditional electric energy meter.
The utility model is not limited to above-mentioned instantiation; every those skilled in the art are without performing creative labour; from the technical scheme that the foregoing description direct derivation goes out, all will fall in the novel protection domain of this implementation, as changing the current transformer specification, deleting phase shortage warning etc.
Claims (2)
1. the farming of three-phase intelligent cassette is irritated and is used electric energy meter, be included as the power supply of each electron device power supply of system, microcontroller, the signal input part of described microcontroller is electrically connected metering circuit module, phase breaking alarm module respectively, carry out the intelligent CPU card of interactive communicate with described microcontroller, as the SAM module of storage unit, display module and pilot relay module that the signal output part of described microcontroller is electrically connected is characterized in that:
Described metering circuit module comprises A phase metering module, B phase metering module, C phase metering module; A phase metering module comprises the phase current sensor, the signal amplifier that is connected with described phase current sensor electrical, the A/D converter that is electrically connected with described signal amplifier, the digital filter that is electrically connected with described A/D converter, the power calculator that is electrically connected with described digital filter; Described A phase metering module also comprises the phase voltage sensor, the signal amplifier that is connected with described phase voltage sensor electrical, the A/D converter that is electrically connected with described signal amplifier, the digital filter that is electrically connected with described A/D converter, the power calculator that is electrically connected with described digital filter; Described B phase metering module is identical with the circuit of A phase metering module with C phase metering module, and described A phase metering module, B phase metering module and C metering module power calculator separately mutually are electrically connected to common totalizer, described totalizer is electrically connected the output pulses modular converter, this pulse signal is through frequency divider, one the tunnel is used for pulse indication and verification, and one the tunnel is used for actuation counter and single-chip microcomputer calculating electric energy;
Described power module comprises the identical A phase transformer of parameter, B phase transformer and C phase transformer, the secondary of described A phase transformer, B phase transformer and C phase transformer wherein between two taps respectively by compiling after the full-wave rectification, again by the resistance-capacitance depressurization voltage stabilizing, obtain microcontroller power supply+5V by voltage stabilizer, filter circuit of pressure-stabilizing at last, before voltage stabilizer, also extracted simultaneously the detection power supply of a 12V out, in order to detect power supply, this detection power supply is input to watchdog circuit, and house dog sends reset signal and gives microcontroller; Three-phase transformer former limit tap and simulation ground obtain measuring power Vcc and negative supply Vss by three phase full wave rectification, capacitance voltage stabilizing circuit and voltage stabilizer jointly;
Described phase breaking alarm module comprises takes a sample respectively in the former limit of A phase transformer, B phase transformer and C phase transformer centre tap, described three former limit centre taps obtain power supply phase shortage indicator signal by electric resistance partial pressure respectively, i.e. A phase, B phase and C phase failure signal mutually; And corresponding pilot lamp extinguishes when the phase failure;
Described CPU card and SAM module all are the E that has microprocessor
2PROM, its inner mask has operating system TIMECOS2.0, and adopts the des encryption method, revises key among the security authentication module SAM by key card.
2. three-phase intelligent cassette farming as claimed in claim 1 is irritated and used electric energy meter, it is characterized in that: described intelligent CPU cartoon crosses deck and microcontroller is electrically connected, and a pair of normally opened contact is arranged on the deck, when the CPU card inserts, and this normally opened contact closure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200213910U CN201060514Y (en) | 2007-05-12 | 2007-05-12 | Three-phase smart card type electric energy meter for farm irrigation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200213910U CN201060514Y (en) | 2007-05-12 | 2007-05-12 | Three-phase smart card type electric energy meter for farm irrigation |
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| Publication Number | Publication Date |
|---|---|
| CN201060514Y true CN201060514Y (en) | 2008-05-14 |
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ID=39408998
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200213910U Expired - Lifetime CN201060514Y (en) | 2007-05-12 | 2007-05-12 | Three-phase smart card type electric energy meter for farm irrigation |
Country Status (1)
| Country | Link |
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| CN (1) | CN201060514Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103475081A (en) * | 2013-09-30 | 2013-12-25 | 河南开启电力实业有限公司 | Auxiliary working power supply for power distribution network control terminal |
| CN104680661A (en) * | 2015-03-10 | 2015-06-03 | 南京天溯自动化控制系统有限公司 | Intelligent prepaying charging method and intelligent prepaying charging device for multiple metering instruments in one household |
| CN109888921A (en) * | 2019-03-01 | 2019-06-14 | 武汉华沃电源技术有限公司 | A kind of movable-type intelligent network system |
-
2007
- 2007-05-12 CN CNU2007200213910U patent/CN201060514Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103475081A (en) * | 2013-09-30 | 2013-12-25 | 河南开启电力实业有限公司 | Auxiliary working power supply for power distribution network control terminal |
| CN104680661A (en) * | 2015-03-10 | 2015-06-03 | 南京天溯自动化控制系统有限公司 | Intelligent prepaying charging method and intelligent prepaying charging device for multiple metering instruments in one household |
| CN104680661B (en) * | 2015-03-10 | 2017-04-05 | 南京天溯自动化控制系统有限公司 | A kind of family multilist intelligence prepaying charge method and apparatus |
| CN109888921A (en) * | 2019-03-01 | 2019-06-14 | 武汉华沃电源技术有限公司 | A kind of movable-type intelligent network system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: WEIFANG WUZHOUHAOTE ELECTRIC CO., LTD. Free format text: FORMER OWNER: WEIFANG HAOTE ELECTRIC BRANCH COMPANY, WUZHOU MINGZHU CO., LTD. Effective date: 20100916 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20100916 Address after: 261061 No. 191 North East Street, hi tech Development Zone, Shandong, Weifang Patentee after: Weifang Wuzhou Haote Electrical Co., Ltd. Address before: 261061 No. 191 North East Street, hi tech Development Zone, Shandong, Weifang Patentee before: Weifang Haote Electric Branch Company, Wuzhou Mingzhu Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20080514 |
|
| CX01 | Expiry of patent term |