CN202339602U - Local single-phase cost control smart electric energy meter - Google Patents
Local single-phase cost control smart electric energy meter Download PDFInfo
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- CN202339602U CN202339602U CN2011205015293U CN201120501529U CN202339602U CN 202339602 U CN202339602 U CN 202339602U CN 2011205015293 U CN2011205015293 U CN 2011205015293U CN 201120501529 U CN201120501529 U CN 201120501529U CN 202339602 U CN202339602 U CN 202339602U
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Abstract
The utility model discloses a local single-phase cost control smart electric energy meter, which comprises a microprocessor, an electric energy meter metering unit, a voltage sampling unit, a current sampling unit and a power supply circuit, wherein the signal output ends of the voltage sampling unit and the current sampling unit are connected with the signal input end of the electric energy meter unit; the data output end of the electric energy meter unit is connected with the data input end of the microprocessor; the output end of the microprocessor is connected with an LCD (Liquid Crystal Display) module, a relay control output interface, a second signal output interface and an electric energy pulse output interface; the control input end of the microprocessor is connected with a key; the microprocessor is connected with a clock circuit, a memory, an infrared communication circuit, an IC (Integrated Circuit) card interface circuit and a serial communication circuit; the power supply input end of the power supply circuit is connected with a storage battery; and the power supply output end of the power supply circuit is connected with the power supply input end of the electric energy meter metering unit, the power supply input end of the microprocessor and the power supply input end of the serial communication circuit respectively. According to the technical scheme, an independent IC card, an infrared interface and an RS485 communication interface are provided, so that local and remote cost control functions are supported.
Description
Technical field
The present technique scheme belongs to electric power metering device, specifically is the single-phase expense control in a kind of this locality intelligent electric energy meter.
Background technology
In the prior art, because the limitation of use occasion, for example city, rural area or factory and enterprise etc., meter reading personnel's workload is very big, and, also be not easy to management.In addition because the situation of application scenario is different, stable, the reliability of electric energy meter there is the higher requirement of ratio.
Summary of the invention
In order to solve the problems referred to above that exist in the prior art, the present technique scheme proposes a kind of new single-phase this locality and takes the control intelligent electric energy meter, and is specific as follows:
The single-phase control intelligent electric energy meter that takes in a kind of this locality comprises microprocessor, electric energy meter metering units, voltage sample unit, current sampling unit and power circuit; The signal output part of said voltage sample unit and current sampling unit is connected the signal input part of electric energy meter metering units; The data output end of electric energy meter metering units connects the data input pin of microprocessor; The output terminal of said microprocessor is connected with LCD display module, relay control output interface, second signal output interface, electrical energy pulse output interface; The control input end of microprocessor is connected with button; Microprocessor also is connected with clock circuit, storer, infrared communication circuit, IC-card interface circuit and serial communication circuit; The power input of said power circuit is connected with accumulator, and the power output end of power circuit connects the power input of electric energy meter metering units, the power input of microprocessor and the power input of serial communication circuit respectively.
The IC-card interface circuit is used to support the CPU card.In the prior art, the CPU card is mainly finance level IC-card.With CPU card (CPU card and SAM module serve as to encrypt medium) is the single-chip microcomputer that the embedded chip of master CPU card is equivalent to a specific type; Inner except having controller, storer is outside the time sequence control logic etc.; Also have algorithm unit and operating system; Memory capacity is big, and processing power is strong, characteristics such as information stores safety.
Said electric energy meter metering units is electric energy meter computation chip ADE7755.
Said voltage sample unit is a resistor voltage divider network.
Said current sampling unit adopts copper-manganese resistance as sampling resistor.
The principle of this electric energy meter is; Tested alternating voltage and electric current are through delivering to special-purpose electric energy computation chip through after a series of digital processings behind the sampling with high precision; Convert the pulse duration frequency signal that is directly proportional with active power to and give microprocessor; Microprocessor carries out timesharing with pulse signal according to the period rate and adds up, and obtains total electric weight and each rate electric weight, and the result is saved in the data memory.The function that microprocessor is accomplished demonstration simultaneously and carried out message exchange with outside (IC-card interface communication, infrared communication, 485 communications, electrical energy pulse output, second signal are exported, relay is controlled and the button input).
Present technique scheme various communication interfaces circuit is supported local, the long-range control function of taking; Advantages such as that this table has is highly reliable, high precision, long-life.It is wide that its adapts to voltage range, and complete machine need not be adjusted after dispatching from the factory.
Description of drawings
Fig. 1 is the theory diagram of present technique scheme.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present technique scheme is further specified as follows:
With reference to figure 1, the single-phase control intelligent electric energy meter that takes in a kind of this locality comprises microprocessor, electric energy meter metering units, voltage sample unit, current sampling unit and power circuit; The signal output part of said voltage sample unit and current sampling unit is connected the signal input part of electric energy meter metering units; The data output end of electric energy meter metering units connects the data input pin of microprocessor; The output terminal of said microprocessor is connected with LCD display module, relay control output interface, second signal output interface, electrical energy pulse output interface; The control input end of microprocessor is connected with button; Microprocessor also is connected with clock circuit, storer, infrared communication circuit, IC-card interface circuit and serial communication circuit; The power input of said power circuit is connected with accumulator, and the power output end of power circuit connects the power input of electric energy meter metering units, the power input of microprocessor and the power input of serial communication circuit respectively.
In this example, said electric energy meter metering units is electric energy meter computation chip ADE7755.Said voltage sample unit is a resistor voltage divider network.Said current sampling unit adopts copper-manganese resistance as sampling resistor.In this example, said IC-card interface circuit adopts SLE4442 IC-card module for reading and writing.
This electric energy meter can satisfy the function and the performance requirement of local electric energy meter by the control/calculation function that has ripe circuit module circuit and microprocessor now.Through the programming to microprocessor, the major function of the electric energy meter that this is routine is following:
1 function of measuring
A) have forward active energy, reverse active energy function of measuring, can store its data, and it is meritorious that combination can be set in view of the above.
B) have the time-sharing measurement function, active energy by the corresponding period add up, store total, point, peak respectively, put down, the paddy electric flux.
C) can store total electric energy and each rate electric flux of 12 months; The data storage boundary is the 24 o'clock the end of month constantly, or the integral point in every month No. 1 to No. 28 constantly.
2, take the control function
Local mode realizes through solid state mediums such as CPU card, radio-frequency cards.
2.1 the local control electric energy meter that takes
In electric energy meter, carry out the electricity charge and calculate in real time, its major function comprises:
A) when remaining sum is less than or equal to the warning amount of money of setting, electric energy meter can be reminded the user with sound, light or other modes; The overdraw amount of money is answered real time record, and when the overdraw amount of money was lower than the overdraw thresholding amount of money of setting, electric energy meter sent power-off signal, control on-load switch interruption of power supply; After electric energy meter received the effectively continuous information of paying tariff, the deduction overdraw amount of money at first when remaining sum during greater than setting value (being defaulted as zero), can make electric energy meter be in the permission "on" position through long-range or local mode, by artificial local recovery power supply.
B) remaining sum can not surpass the maximum Stored Value amount of money of electric energy meter that design allows; The maximum Stored Value amount of money is determined by the electric energy meter figure place showing.
C) electricity charge amount of money that prestores of electric energy meter should be able to carry out accurate superposition with the remaining sum in the table, and can information such as remaining sum, electric energy meter power consumption parameter be returned and be written to solid state medium.
D) electric energy meter is not accepted any information of non-appointment medium input.When using non-appointment medium or carrying out illegal operation, electric energy meter can effectively protect; After non-appointment medium or illegal operation are cancelled, electric energy meter can operate as normal and data do not lose.
G) through solid state medium to electric energy meter carry out the parameter setting, the electricity charge that prestore, information are returned and are write, ESAM data copy reading and when issuing the remote control command operation; Need through strict password authentification and safety certification, other power consumption parameter settings except that the user purchases electrical information also should be in electric energy meter to programme under the enable state and can carry out through programming key and programming password authentification.
2.2 safety certification is encrypted requirement
Through solid state medium or virtual medium electric energy meter is carried out the parameter setting, the electricity charge that prestore, when information is returned and write and issue the remote control command operation, needs through safety certifications such as strict password authentification or ESAM modules, reliable to guarantee data transmission security.The AES of ESAM module should meet the relevant policies of national Password Management, uses the SM1 algorithm.
3 logouts
A) generation of permanent recording electric energy meter zero clearing incident constantly and the electric energy data during zero clearing.
B) record programming total degree, the Data Identification of the moment of nearest 10 programmings, operator's code, programming item.Adopt
The moment, operator's code when c) record total degree (when not comprising the broadcasting school) during the school, nearest 10 schools.
D) total degree of record power down, the moment that nearest 10 power down take place and finish.
E) nearest 10 Long-distance Control of record are operated a switch and nearest 10 Long-distance Control combined floodgate incidents, and record draws, data such as the moment and electric flux take place the combined floodgate incident.
F) record game clock lid total degree, generation, the finish time of nearest 10 game clock lid incident.
4, rate, period and electricity price scheme
Have two cover tariff period tables, can change automatically in the moment of agreement; Every cover rate is supported 4 rates at least.
Have calendar, clock, should can be provided with 2 time zones the whole year at least, in 24h, can programme arbitrarily 8 periods at least; The minimum interval of period is 15min; Period can cross over reset.
Have two cover electricity price schemes, change automatically in the time of can or reaching the power consumption level of agreement in moment of agreement.
Support through infrared, RS485 communication interface revise rate scale, the time segment table and electricity price scheme, the safety practice that prevents that unauthorized people from operating is arranged.
5, Presentation Function
A) electric energy meter can show following information:
1) of that month and monthly totally power consumption last month;
2) the current residual amount of money;
3) current ladder electricity price;
4) each rate accumulative total electric flux indicating value and total accumulative total electric flux indicating value;
5) current time;
6) alarm code or prompting;
7) plug-in card and communications status prompting;
8) table number of electric energy meter.
B) the electric weight unit of display is kilowatt hour (kWh), and figure place showing is 8, contains 2 decimals.
C) the remaining sum unit of display is a unit, and figure place showing is 8, contains 2 decimals.
D) the LCD mode of waking up backlight, comprise that button wakes up, infrared waking up (infrared equipment all can wake up arbitrarily), etc. mode; Under normal operating position, the LCD life-span is not less than 10 years.
Can wake demonstration (backlight can not lighted) up through button when e) having a power failure; Wake the back up as do not have operation, LCD should close after showing a circulation automatically automatically; The button display operation finishes to close demonstration automatically after 30 seconds.
F) pilot lamp :-pulse pilot lamp: redness, go out at ordinary times, glimmer during the metering active energy;
-alarm lamp: redness, just often go out, it is bright often to report to the police.
-tripping operation pilot lamp: yellow, bright during the on-load switch disjunction, go out at ordinary times.
6, freezing function
Regularly freeze: electric energy data is freezed at time by appointment and interval; Each amount of freezing is preserved 12 times at least.
Instantaneous freezing: under improper situation, freeze the data of current calendar, time, all electric fluxs and important measuring amount; The instantaneous amount of freezing should be preserved last 3 times data.
Agreement is freezed: think in the old and new two cover rates/periods conversion, the conversion of ladder electricity price or Utilities Electric Co. and freeze to change electric flux and other significant datas constantly when special requirement is arranged, preserve last 2 freezing data.
Day freezes: storage electric flux constantly at zero point every day, should store bimestrial data.
Integral point freezes: the storage integral point moment or the least bit meritorious total electric energy constantly, should store 96 data.
The Data Identification that freezes content and correspondence should meet the DL/T 645-2007 and the documentation requirements of putting on record thereof.
7, clocking capability
Employing has the built in hardware clock circuit of temperature compensation function, has calendar, timing, leap year auto-conversion function; Internal clocking terminal output frequency is 1Hz.In 25～+ 60 ℃ of temperature ranges, the clock accuracy≤± 1s/d; Under reference temperature (23 ℃), the clock accuracy≤± 0.5s/d.
Scope must not be greater than 5min during the acceptable broadcasting of electric energy meter school; Key and signal code cooperation need not to programme during the broadcasting school; Number of times can be provided with (default to when only allowing the school every day once) as requested when allowed the school every day, and should avoid electric energy meter carry out freeze or settlement data unloading operation before and after carry out in the 5min.
Claims (4)
1. the single-phase control intelligent electric energy meter that takes in this locality is characterized in that comprising microprocessor, electric energy meter metering units, voltage sample unit, current sampling unit and power circuit; The signal output part of said voltage sample unit and current sampling unit is connected the signal input part of electric energy meter metering units; The data output end of electric energy meter metering units connects the data input pin of microprocessor; The output terminal of said microprocessor is connected with LCD display module, relay control output interface, second signal output interface, electrical energy pulse output interface; The control input end of microprocessor is connected with button; Microprocessor also is connected with clock circuit, storer, infrared communication circuit, IC-card interface circuit and serial communication circuit; The power input of said power circuit is connected with accumulator, and the power output end of power circuit connects the power input of electric energy meter metering units, the power input of microprocessor and the power input of serial communication circuit respectively.
2. the single-phase control intelligent electric energy meter that takes in this locality according to claim 1 is characterized in that said electric energy meter metering units is electric energy meter computation chip ADE7755.
3. the single-phase control intelligent electric energy meter that takes in this locality according to claim 1 is characterized in that said voltage sample unit is a resistor voltage divider network.
4. the single-phase control intelligent electric energy meter that takes in this locality according to claim 1 is characterized in that said current sampling unit adopts copper-manganese resistance as sampling resistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205015293U CN202339602U (en) | 2011-12-06 | 2011-12-06 | Local single-phase cost control smart electric energy meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205015293U CN202339602U (en) | 2011-12-06 | 2011-12-06 | Local single-phase cost control smart electric energy meter |
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| Publication Number | Publication Date |
|---|---|
| CN202339602U true CN202339602U (en) | 2012-07-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205015293U Expired - Fee Related CN202339602U (en) | 2011-12-06 | 2011-12-06 | Local single-phase cost control smart electric energy meter |
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| CN (1) | CN202339602U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103593917A (en) * | 2012-08-15 | 2014-02-19 | 成都昊地科技有限责任公司 | Pre-payment electric energy meter based on intelligent information carrier |
| CN105261121A (en) * | 2015-09-29 | 2016-01-20 | 成都易信达科技股份有限公司 | Method of providing advance water amount by intelligent water meter |
-
2011
- 2011-12-06 CN CN2011205015293U patent/CN202339602U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103593917A (en) * | 2012-08-15 | 2014-02-19 | 成都昊地科技有限责任公司 | Pre-payment electric energy meter based on intelligent information carrier |
| CN105261121A (en) * | 2015-09-29 | 2016-01-20 | 成都易信达科技股份有限公司 | Method of providing advance water amount by intelligent water meter |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120718 Termination date: 20131206 |