CN102901851A - Single-phase remote-cost control intelligent ammeter with RS485 control signal output - Google Patents
Single-phase remote-cost control intelligent ammeter with RS485 control signal output Download PDFInfo
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Abstract
The invention provides a single-phase remote-cost control intelligent ammeter with RS485 control signal output, and relates to an intelligent ammeter, aiming a solving the problem that the existing single-phase remote-cost control intelligent ammeter can not control different states of more than one switch. A signal output or input end of a metering circuit of the single-phase remote-cost control intelligent ammeter is connected with a No.1 signal input or output end of a processing circuit, and a No.2 signal input or output end of the processing circuit is connected with a signal output or input end of an interface circuit. According to the single-phase remote-cost control intelligent ammeter, the communication with various modes can be realized, an R485 communication interface not only can be used for setting local parameters, reading the data of the ammeter, and outputting a control signal, to control the power off or power on of an intelligent household electrical appliance or an intelligent socket, so that the different states of more than one switch can be controlled. The single-phase remote-cost control intelligent ammeter is suitable for the occasion where the electric energy needs to be metered and intelligently controlled.
Description
Technical field
The present invention relates to a kind of intelligent electric energy meter, be specifically related to a kind of single-phase remote cost control intelligent electric energy meter.
Background technology
In order to implement the development plan of building " strong intelligent grid ", State Grid Corporation of China issued relevant criterion (Q/GDW354-2009, Q/GDW355-2009, Q/GDW364-2009, Q/GDW365-2009) about the single-phase intelligent ammeter in September, 2009, and began to have carried out the concentrated scale bid of intelligent electric meter in 2010.In the above-mentioned standard to comprising the functional requirement of single-phase intelligent ammeter: the forward and reverse meritorious metering of timesharing, operational factor measurement, data-frozen storage, pre-payment control, logout and warning, local display operation, long-rangely stop upper Electricity Functional, make great progress with before common electrical minor single-phase electric energy meter.But along with the continuous propelling that intelligent grid and Internet of Things merge, the pilot of intelligent power housing estate development and popularization constantly increase by the demand that communicates and control power on/off between intelligent electric meter and intelligent appliance or the smart jack.Existing single-phase remote cost control intelligent electric energy meter long-range stops upper Electricity Functional, is to be opposite in the ammeter or the outer on-load switch (magnetic latching relay) of ammeter carries out long-range outage, upper electric control.Be that intelligent electric energy meter is exported one group of switching signal, the switching node capacity is for exchanging 250V, 2A.During normal operation, the switching signal of output is kept on-load switch and is closed a floodgate, and allows user power utilization; When satisfying outage controlled condition, the switching signal of output drives on-load switch action, interruption of power supply.This control mode can not be carried out to more than one switch the control of different conditions.
Summary of the invention
The present invention can not carry out to more than one switch the problem of the control of different conditions in order to solve existing single-phase remote cost control intelligent electric energy meter, thereby a kind of single-phase remote cost control intelligent electric energy meter of the RS485 of having control signal output is provided.
Single-phase remote cost control intelligent electric energy meter with the output of RS485 control signal, it comprises metering circuit, treatment circuit and interface circuit, the signal output of metering circuit or input end input or output end with a signal for the treatment of circuit and are connected, and No. two signals for the treatment of circuit input or output end and are connected with signal output or the input end of interface circuit;
Metering circuit comprises voltage sampling circuit, a current sampling circuit, No. two current sampling circuits, metering units and pulse output units, described voltage sampling circuit is used for gathering the voltage of live wire, No. one current sampling circuit is used for collection by the electric current of live wire, and No. two current sampling circuits are used for collection by the electric current of zero line; The voltage sampling signal output terminal of voltage sampling circuit and the voltage sampling signal input end of metering units connect, No. one current sampling circuit current sampling signal output terminal is connected with a current sampling signal input end of metering units, and the current sampling signal output terminal of No. two current sampling circuits is connected with No. two current sampling signal input ends of metering units;
Interface circuit comprises RS485 communication unit, jumping/switching-in control unit and built-in relay, and the RS485 communication unit be used for to realize that treatment circuit communicates by letter with RS485 between the user; Built-in relay is connected on the live wire, and the control signal output terminal of jumping/switching-in control unit is connected with the control signal input end of built-in relay.
Beneficial effect: the present invention can realize the communication of various ways, the RS485 communication interface except can the local parameter setting, the data of copy reading ammeter itself, can also export control signal, the outage of control intelligent appliance or smart jack or power on has realized a plurality of above switches are carried out the control of different conditions.
Description of drawings
Fig. 1 is structural representation of the present invention; Fig. 2 is control flow schematic diagram of the present invention.
Embodiment
Embodiment one, in conjunction with Fig. 1 and Fig. 2 this embodiment is described, single-phase remote cost control intelligent electric energy meter with the output of RS485 control signal, it comprises metering circuit 2, treatment circuit 3 and interface circuit 4, the signal output of metering circuit 2 or input end input or output end with a signal for the treatment of circuit 3 and are connected, and No. two signals for the treatment of circuit 3 input or output end and are connected with signal output or the input end of interface circuit 4;
Metering circuit 2 comprises voltage sampling circuit 23, a current sampling circuit 24, No. two current sampling circuits 25, metering units 22 and pulse output units 21, described voltage sampling circuit 23 is used for gathering the voltage of live wire, No. one current sampling circuit 24 is used for collection by the electric current of live wire, and No. two current sampling circuits 25 are used for collection by the electric current of zero line; The voltage sampling signal output terminal of voltage sampling circuit 23 and the voltage sampling signal input end of metering units 22 connect, No. one current sampling circuit 24 current sampling signal output terminals are connected with a current sampling signal input end of metering units 22, and the current sampling signal output terminal of No. two current sampling circuits 25 is connected with No. two current sampling signal input ends of metering units 22;
Present embodiment is the requirement according to Q/GDW354-2009 " intelligent electric energy meter functional specification ", Q/GDW355-2009 " single-phase intelligent electric energy meter pattern standard ", Q/GDW 364-2009 " single-phase intelligent electric energy meter technical manual ", Q/GDW365-2009 " intelligent electric energy meter message exchange secure authentication technology standard ", and the mode of employing " microprocessor+the special metering IC " realizes.
Metering circuit in the present embodiment comprises:
(1) AC sampling
Friendship is adopted and is comprised voltage, electric current, neutral line current three road signals, and the sampling of voltage realizes by the mode of electric resistance partial pressure; And the reference ground problem of sampled signal is considered in the sampling of two-way electric current, and the array mode that adopts manganese copper diverter to add current transformer realizes.
(2) metering, measuring unit
Owing to needing measurement function, and possessing three drive test amount loops, selecting the RN8209 of the sharp energy in Shenzhen.This chip has three drive test amount loops (∑-Δ ADC); The active energy error in 1500: 1 dynamic ranges＜0.1%; The reactive energy error in 1500: 1 dynamic ranges＜0.1%; Provide two-way electric current and one road voltage effective value to measure, in 400: 1 dynamic ranges, effective value error＜0.5%; , built-in 2.5 ± 3% reference voltages, 25ppm/ ℃ of temperature coefficient representative value, the characteristics such as SPI interface can satisfy the demands.
In the present embodiment, after electric energy meter has a power failure, need pass through powered battery, realize the operations such as demonstration, button that have a power failure, need to carry out low-power consumption on the software and process, should isolate on the hardware, to satisfy the requirement of the long-term power supply of battery, average power consumption should satisfy below 15uA after having a power failure.
In the present embodiment, RS485 communication need to be carried out electrical isolation, and power supply can realize by transformer, and signal can be realized by optocoupler; The RS485 conversion chip must with fail safe, also can draw the mode of resistance to realize by the outside.
In the present embodiment, relay is installed in electric energy meter inside, mainly considers contact capacity, the parameters such as control voltage, power ratio control, and producer normally offers the client with relay and manganese copper diverter with the form of assembly, should consider in the lump when selecting.
The difference of the single-phase remote cost control intelligent electric energy meter of embodiment two, this embodiment and the embodiment one described RS485 of having control signal output is, treatment circuit 3 comprises MCU31, storage unit 32, real-time clock unit 33 and data enciphering/deciphering unit 34, storage unit 32 is used for data are stored, real-time clock unit 33 is used for providing real-time clock signal, and data enciphering/deciphering unit 34 is used for that data are carried out enciphering/deciphering to be processed.
Treatment circuit in the present embodiment comprises:
(1) data are processed
It is NEC 78K0_Kx2 series microprocessor uPD78F0525A that the microprocessor of data processing section adopts model, and this microprocessor possesses following fundamental characteristics: the 1. Flash memory capacity of 60k, the high-speed RAM of 1k, the expansion RAM of 2k; 2. the shortest execution time of instruction can change between (0.1s: the operating frequency of High Speed System clock is 20MHz) and the Ultra-Low Speed (operating frequency of 122us subsystem clock is 32.768kHz) at a high speed; 3. the built-in zero clearing that powers on (POC) circuit and low-voltage detection circuit (LVI); 4. supply voltage: VDD=1.8～5.5V; 5. operating ambient temperature: TA=-40～+ 85C.
(2) storage
Select the AT24C256 of ATMEL, this chip satisfies read-write often, and capacity is large, and is low in energy consumption, the requirement of wide power scope.
(3) real-time clock
The EPSON RTC8025T that the employing of real-time clock carries the temperature compensation circuit realizes.
(4) data encrypting and deciphering
The SM1 algorithm is adopted in data encryption.
The difference of the single-phase remote cost control intelligent electric energy meter of embodiment three, this embodiment and embodiment one or the two described RS485 of having control signal outputs is, interface circuit 4 also comprises infrared communication unit 44, the infrared communication that described infrared communication unit 44 is used between realization treatment circuit 3 and the user.
In the present embodiment, infrared employing modulation type, carrier wave 38k.
The difference of the single-phase remote cost control intelligent electric energy meter of embodiment four, this embodiment and the embodiment three described RS485 of having control signal outputs is, interface circuit 4 also comprises carrier communication unit 46, the carrier communication that described carrier communication unit 46 is used between realization treatment circuit 3 and the user.
Present embodiment adopts Modular Structure Design.Adopt transformer coupled mode, realize the isolation between the strong and weak electricity.Design of Communication Interface between carrier module and the base table satisfies Q/GDW 355-2009 " single-phase intelligent electric energy meter pattern standard " requirement.Carrier module can use the technical scheme of various producers.
The difference of the single-phase remote cost control intelligent electric energy meter of embodiment five, this embodiment and embodiment one, the two or four described RS485 of having control signal outputs is, interface circuit 4 also comprises display unit 41, and described display unit 41 is used for showing electric energy meter information.
The difference of the single-phase remote cost control intelligent electric energy meter of embodiment six, this embodiment and the embodiment five described RS485 of having control signal outputs is, interface circuit 4 also comprises LED and back light unit 42, and described LED and back light unit 42 are used for providing caution and backlight.
In the present embodiment, show and adopt LCD giant-screen Chinese character to show, the Chinese character content should be able to satisfy the requirement of demonstration particular content, and material is HTN or FSTN wide temperature range type.Display driver should satisfy the requirement of display screen hop count, and has wide power scope, low-power consumption; The LED lamp should adopt high bright light.The employing white light source that needs backlight.
The difference of the single-phase remote cost control intelligent electric energy meter of embodiment seven, this embodiment and embodiment one, two, the four or six described RS485 of having control signal outputs is, interface circuit 4 also comprises keyswitch 43, and described keyswitch 43 is used for providing button operation.
In the present embodiment, keyswitch also is to process as input, output circuit, and what input, output had an outside direct interface need to carry out electrical isolation by optocoupler, and what do not have direct interface can not isolate (such as button, the detection of uncapping).
The difference of the single-phase remote cost control intelligent electric energy meter of embodiment eight, this embodiment and the embodiment seven described RS485 of having control signal outputs is, it also comprises power circuit 1, described power circuit 1 is connected with live wire, and described power circuit 1 is used for providing working power to the RS485 communication unit 45 of metering circuit 2, treatment circuit 3, interface circuit 4 and interface circuit 4.
Present embodiment is ac power supply: from the power demands of single-phase remote cost control intelligent electric energy meter, adopted the power supply output of 3 tunnel electric mutual isolation, sampling is supplied with on a road and metering is used, consider the employing manganese copper diverter, directly access live wire or zero line with reference to ground, the self coupling mode can be adopted in this road; The b road offers processor and other circuit (except the RS485 communications portion), and the output power of this part is larger, is the main road power supply, and cooperates the driving of relay to design; C road power supply offers RS485 communication, and output power is little, is the bypass power supply.
The function that the present invention can realize has:
(1) function of measuring
Have forward active energy, reverse active energy function of measuring, can store its data, and it is meritorious that combination can be set accordingly.
Have the time-sharing measurement function, active energy by the corresponding period add up respectively, store total, point, peak, put down, the paddy electric flux.
(2) take the control function
Take the control function by virtual medium and the realizations of long-range electricity-selling system such as carrier waves.
(3) rate, period and electricity price scheme
1. have two cover tariff period tables, can automatically change in the moment of agreement; Every cover rate should be supported 4 rates at least.
2. have calendar, clock, can arrange at least 2 time zones the whole year, can programme arbitrarily 8 periods at least in 24h; The minimum interval of period is 15min; Period can cross over reset.
3. have two cover electricity price schemes, automatically change in the time of can or reaching the power consumption level of agreement in moment of agreement.
4. support by infrared, RS485 communication interface revise rate scale, the time segment table and electricity price scheme, and the safety practice that prevents that unauthorized people from operating should be arranged.
(4) logout
1. the generation of permanent recording electric energy meter zero clearing event constantly and the electric energy data during zero clearing.
2. record the programming total degree, the Data Identification of the moment of nearest 10 programmings, operator's code, programming item.
3. total degree in the time of should recording the school (when not comprising the broadcasting school), the moment during nearest 10 schools, operator's code.
4. should record the total degree of power down, the moment that nearest 10 power down occur and finish.
5. record nearest 10 Long-distance Control and operate a switch and nearest 10 Long-distance Control combined floodgate events, record draws, the data such as the moment and electric flux occur the combined floodgate event.
6. record game clock lid total degree, generation, the finish time of nearest 10 game clock lid event.
(5) measurement function
The operational factors such as energy is measured, record, the voltage that shows current electric energy meter, electric current (comprising neutral line current), power, power factor.Measuring error (fiducial error) is no more than ± and 1%.
(6) data storage
Can store unidirectional or two-way total electric energy and each rate energy data of 12 name days; The data conversion storage boundary constantly is 24 o'clock (beginning of the month is when zero) at the end of month, or the integral point in per month 1 to 28 constantly.
In the situation that the electric energy meter electric source outage, all data relevant with clearing were preserved more than 10 years, and other data are preserved more than 5 years.
(7) freezing function
1. the Data Identification that freezes content and correspondence should meet DL/T 645-2007 and the documentation requirements of putting on record thereof.
2. regularly freeze: electric energy data is freezed at time and interval according to agreement; Each amount of freezing should be preserved 12 times at least.
3. instantaneous freezing: under abnormal condition, 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.
4. agreement is freezed: think in the old and new two cover rates/periods conversion, step price conversion 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.
5. day freezes: store electric flux constantly at zero point every day, should store 60 days data.
6. integral point freezes: the storage integral point moment or the least bit meritorious total electric energy constantly, should store 96 data.
(8) clocking capability
1. adopt the built in hardware clock circuit with temperature compensation function, have 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.
2. scope is not more than 5min during the acceptable broadcasting of electric energy meter school; Key and signal code cooperation need not to programme during the broadcasting school; Only allow check and correction every day once, and should avoid electric energy meter carry out freeze or settlement data unloading operation before and after carry out in the 5min.
(9) communication function
Upwards communication (communicating by letter with concentrator or the collector of power information acquisition system) communicates by the power line carrier mode; Local communication has infrared ray, RS485 communication, and RS485 and infrared communication interface have independently physical channel, can the copy reading data, parameters; The RS485 communication interface can also be exported control signal, communicates with intelligent appliance or smart jack.
(10) multi-functional output
The exportable time signal of multifunctional signal terminal, period switching signal etc. are so that the monitoring personnel detect.Can carry out signal output conversion by the software setting at same multifunctional signal terminal; The default time signal that is output as.Time signal is a second signal; Period switching signal is the pulse signal of 80ms ± 20ms.Possesses clock signal output terminal.
(11) warning function
When following fault occurring or report to the police item, LCD rests on this code or alarm immediately, and backlight continues to light;
When remaining the electricity charge less than the warning electricity charge, prompting " asking power purchase ";
When electric energy meter breaks down, show the information code (representing with Err-X X) of makeing mistakes:
1. Err-01 control loop mistake;
2. Err-02ESAM mistake;
3. Err-04 clock cell voltage is low;
4. Err-08 clock failure;
5. Err-10 authentication error;
6. Err-16 revises wrong cipher key.
(12) electric weight zero clearing
Can remove the data such as the interior electric weight of storing of electric energy meter, the amount of freezing, logout.
Clear operation can be used as the event permanent recording, has the measures such as hardware programming switch, operator password, seal management and the front data of reservation zero clearing, to prevent unauthorized people's operation.The degree value can only zero clearing at the bottom of the electric energy meter, does not allow to set.
(13) security protection (program switch, password authentification)
Program switch: adopt the button design, and only after opening seal, can touch program switch; Under programmable state, if in 240 minutes without any operation, electric energy meter is with the autoshutdown programming state.
Password authentification: electric energy meter need could be carried out programming or other special operationals by the programming password authentification.Password adopts the two-stage management, and every one-level password is comprised of 6 arabic numeral; The password Permission Levels are different, and executable operation is different.
Personnel with high-grade password authority can revise the inferior grade password, and carry out all operations of inferior grade password.Continuous 3 Password Input mistakes, electric energy meter was with autoshutdown programing function 24 hours.
(14) display operation
Adopt giant-screen Chinese character display screen, the FSTN of superior performance or HTN material, its operating temperature range is-40 ℃～+ 70 ℃ (FSTN is-25 ℃～+ 80 ℃); And have highlighted LED-backlit function, and when any button operation is arranged, backlight lightening.
Electric energy meter has two buttons, is respectively " selection " and " programming " button, and options button is used for the operation of display menu; " programming " key is used for the switch programming and allows operation (possessing the lead sealing protection).
(15) liquid crystal display
Electric energy meter shows default menu totally 27 screens, can consult by " selection " key; Automatically follow aobvious 6 screens, in the situation that without any button operation, automatically follow aobvious.
Button display menu and follow aobvious formation content and also can arrange by Master Station Software is to satisfy user's specific (special) requirements.Electric energy meter can show following information at least:
1. of that month and last month monthly totally power consumption;
2. the current residual amount of money;
3. current step price;
4. each rate accumulative total electric flux indicating value and always accumulative total electric flux indicating value;
5. current time;
6. alarm code or prompting;
7. the table number of electric energy meter.
The electric weight unit of display is kilowatt hour (kWh), and figure place showing is 8, contains 2 decimals.The remaining sum unit of display is unit, and figure place showing is 8, contains 2 decimals.
LCD wake-up mode backlight comprises the modes such as button wakes up, infrared waking up (infrared equipment all can wake up arbitrarily); Under normal operating position, the LCD life-span is not less than 10 years.
Can wake demonstration (backlight can not lighted) up by button during power failure; After waking up as without operation, LCD answers autoshutdown after automatically showing a circulation; The button display operation finishes autoshutdown demonstration after 30 seconds.Reveal codes is referring to " intelligent electric energy meter functional specification " appendix B.
(16) local operation
Power on behind the electric energy meter correct wiring, full frame lighting 20 seconds, press options button this moment, can carry out the switching of display menu, query-relevant data and parameter; Also can be by infrared inquiry.
When using the infrared palm computer to carry out infrared communication, infrared window should be aimed at electric energy meter infrared communication mouth and become horizontal direction (or in 45 degree scopes), send order and etc. pending data until finish receiving..
When carrying out parameter by RS485 when arranging, need to open down turnover cover, press the permission program switch, until showing, electric energy meter allows programmed symbol (referring to the displaying symbol explanation), can carry out the parameter setting this moment, programming allows switch will automatically recover to forbid programming after opening 4 hours, allows programmed symbol to disappear.When carrying out parameter when arranging, need password authentification, if password authentification mistake 3 times, then electric energy meter enters lock-out state, forbids any setting; Automatic unlocking after 24 hours.
(17) operated from a distance
Send the order of operating a switch by long-range main website/electricity-selling system when subscriber arrearage, electric energy meter will automatically wind up.After electric energy meter successfully receives the order of operating a switch, LCD will show " operating a switch " character blinking prompting, wait for that tripping operation time delay (being defaulted as 1 minute) finishes, and electric energy meter drives relay and operates a switch; After operating a switch successfully, " operating a switch " character no longer glimmers and keeps showing, the LED light that trips simultaneously also is lit.
After the user supplemented with money, long-range main website/electricity-selling system sent and allows the order of closing a floodgate, and electric energy meter is with automatic closing.After electric energy meter successfully received order, this moment, LCD showed that " operating a switch " character will disappear; After closing a floodgate successfully, the tripping operation LED light also will be extinguished.When electric energy meter needs on-the-spotly when triggering manual closing operation, long-range can only the transmission allows the order of closing a floodgate, can not automatic closing, need to start closing operation by on-the-spot button, and button must be pressed and continue just can start more than 3 seconds; When electric energy meter does not possess this function, after reception is ordered successfully, incite somebody to action immediately automatic closing.
(18) RS485 controls the outage of intelligent appliance or smart jack or powers on
The RS485 communication interface can also be exported control signal except the data that local parameter, copy reading ammeter itself can be set, the outage of control intelligent appliance or smart jack or power on.Can send order by the power information acquisition system by the main website of system controls intelligent appliance or smart jack.
Certainly, above-mentioned explanation is not to be limitation of the present invention, and the present invention also is not limited in above-mentioned giving an example, and the variation that those skilled in the art make in essential scope of the present invention, remodeling, interpolation or replacement also should belong to protection scope of the present invention.
Claims (8)
1. the single-phase remote cost control intelligent electric energy meter that has the output of RS485 control signal, it is characterized in that: it comprises metering circuit (2), treatment circuit (3) and interface circuit (4), the signal output of metering circuit (2) or input end input or output end with a signal for the treatment of circuit (3) and are connected, and No. two signals for the treatment of circuit (3) input or output end and are connected with signal output or the input end of interface circuit (4);
Metering circuit (2) comprises voltage sampling circuit (23), a current sampling circuit (24), No. two current sampling circuits (25), metering units (22) and pulse output unit (21), described voltage sampling circuit (23) is used for gathering the voltage of live wire, a current sampling circuit (24) is used for gathering the electric current by live wire, and No. two current sampling circuits (25) are used for gathering the electric current by zero line; The voltage sampling signal input end of the voltage sampling signal output terminal of voltage sampling circuit (23) and metering units (22) connects, a current sampling circuit (24) current sampling signal output terminal is connected with a current sampling signal input end of metering units (22), and the current sampling signal output terminal of No. two current sampling circuits (25) is connected with No. two current sampling signal input ends of metering units (22);
Interface circuit (4) comprises RS485 communication unit (45), jumping/switching-in control unit (47) and built-in relay (48), and RS485 communication unit (45) be used for to realize that treatment circuit (3) communicates by letter with RS485 between the user; Built-in relay (48) is connected on the live wire, and the control signal output terminal of jumping/switching-in control unit (47) is connected with the control signal input end of built-in relay (48).
2. the single-phase remote cost control intelligent electric energy meter with RS485 control signal output according to claim 1, it is characterized in that treatment circuit (3) comprises MCU (31), storage unit (32), real-time clock unit (33) and data enciphering/deciphering unit (34), storage unit (32) is used for data are stored, real-time clock unit (33) is used for providing real-time clock signal, and data enciphering/deciphering unit (34) is used for that data are carried out enciphering/deciphering to be processed.
3. the single-phase remote cost control intelligent electric energy meter with RS485 control signal output according to claim 1 and 2, it is characterized in that interface circuit (4) also comprises infrared communication unit (44), described infrared communication unit (44) is used for the infrared communication between realization treatment circuit (3) and the user.
4. the single-phase remote cost control intelligent electric energy meter with RS485 control signal output according to claim 3, it is characterized in that interface circuit (4) also comprises carrier communication unit (46), described carrier communication unit (46) is used for the carrier communication between realization treatment circuit (3) and the user.
5. according to claim 1,2 or 4 described single-phase remote cost control intelligent electric energy meters with the output of RS485 control signal, it is characterized in that interface circuit (4) also comprises display unit (41), described display unit (41) is used for showing electric energy meter information.
6. the single-phase remote cost control intelligent electric energy meter with RS485 control signal output according to claim 5, it is characterized in that interface circuit (4) also comprises LED and back light unit (42), described LED and back light unit (42) are used for providing caution and backlight.
7. according to claim 1,2,4 or 6 described single-phase remote cost control intelligent electric energy meters with the output of RS485 control signal, it is characterized in that interface circuit (4) also comprises keyswitch (43), described keyswitch (43) is used for providing button operation.
8. the single-phase remote cost control intelligent electric energy meter with RS485 control signal output according to claim 7, it is characterized in that it also comprises power circuit (1), described power circuit (1) is connected with live wire, and described power circuit (1) is used for providing working power to the RS485 communication unit (45) of metering circuit (2), treatment circuit (3), interface circuit (4) and interface circuit (4).
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| CN106329721A (en) * | 2016-06-01 | 2017-01-11 | 杭州华泰电气技术有限公司 | Integrated intelligent ammeter and electric power measurement and control protection system |
| CN106771574A (en) * | 2016-12-29 | 2017-05-31 | 上海国缆智能电气有限公司 | A kind of single-phase intelligent ammeter and its implementation |
| CN107202919A (en) * | 2016-10-28 | 2017-09-26 | 北京京仪北方仪器仪表有限公司 | Intelligent electric energy meter with communication interface |
| CN107424402A (en) * | 2017-09-13 | 2017-12-01 | 杭州乾龙电器有限公司 | The carrier module that can be communicated with external equipment |
| CN108092952A (en) * | 2017-11-09 | 2018-05-29 | 宁波三星医疗电气股份有限公司 | A kind of method for protecting intelligent electric meter data safety |
| CN108469725A (en) * | 2018-03-27 | 2018-08-31 | 国网河北省电力有限公司电力科学研究院 | Clock calibration method and terminal device |
| CN106097588B (en) * | 2016-06-15 | 2018-11-02 | 无锡市恒通电器有限公司 | A kind of single-phase cost-control intelligent ammeter |
| CN109061292A (en) * | 2018-06-30 | 2018-12-21 | 北京东方英卡数字信息技术有限公司 | A kind of wireless street lamp micro-base station electric energy metering device and connection method |
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| CN103792402A (en) * | 2012-11-02 | 2014-05-14 | 苏州工业园区新宏博通讯科技有限公司 | Electric energy meter |
| CN103439554B (en) * | 2013-09-06 | 2016-08-17 | 深圳市拓远能源科技有限公司 | A kind of data readback and storage device and system thereof |
| CN103439554A (en) * | 2013-09-06 | 2013-12-11 | 深圳市拓远能源科技有限公司 | Data backward-reading and storing device and system thereof |
| CN104391173A (en) * | 2014-12-08 | 2015-03-04 | 国网宁夏电力公司固原供电公司 | Jump-out type expenditure-controlled intelligent electric energy meter system and jump-out type expenditure-controlled intelligent electric energy meter |
| CN105652056B (en) * | 2015-12-30 | 2018-10-02 | 宁波三星医疗电气股份有限公司 | Single-phase electric energy meter voltage changes the self-adapting compensation method of influence amount |
| CN105652056A (en) * | 2015-12-30 | 2016-06-08 | 宁波三星医疗电气股份有限公司 | Self-adaptive compensation method of single-phase electric energy meter voltage change influence quantity |
| CN106329721A (en) * | 2016-06-01 | 2017-01-11 | 杭州华泰电气技术有限公司 | Integrated intelligent ammeter and electric power measurement and control protection system |
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| CN106097588B (en) * | 2016-06-15 | 2018-11-02 | 无锡市恒通电器有限公司 | A kind of single-phase cost-control intelligent ammeter |
| CN107202919B (en) * | 2016-10-28 | 2019-12-13 | 北京京仪北方仪器仪表有限公司 | Intelligent electric energy meter with communication interface |
| CN107202919A (en) * | 2016-10-28 | 2017-09-26 | 北京京仪北方仪器仪表有限公司 | Intelligent electric energy meter with communication interface |
| CN106771574A (en) * | 2016-12-29 | 2017-05-31 | 上海国缆智能电气有限公司 | A kind of single-phase intelligent ammeter and its implementation |
| CN107424402A (en) * | 2017-09-13 | 2017-12-01 | 杭州乾龙电器有限公司 | The carrier module that can be communicated with external equipment |
| CN108092952A (en) * | 2017-11-09 | 2018-05-29 | 宁波三星医疗电气股份有限公司 | A kind of method for protecting intelligent electric meter data safety |
| CN108092952B (en) * | 2017-11-09 | 2020-12-29 | 宁波三星医疗电气股份有限公司 | Method for protecting data security of intelligent electric meter |
| CN108469725A (en) * | 2018-03-27 | 2018-08-31 | 国网河北省电力有限公司电力科学研究院 | Clock calibration method and terminal device |
| CN108469725B (en) * | 2018-03-27 | 2020-06-26 | 国网河北省电力有限公司电力科学研究院 | Clock timing method and terminal equipment |
| CN109061292A (en) * | 2018-06-30 | 2018-12-21 | 北京东方英卡数字信息技术有限公司 | A kind of wireless street lamp micro-base station electric energy metering device and connection method |
| CN109342810A (en) * | 2018-10-23 | 2019-02-15 | 广州汉光电气股份有限公司 | A kind of multi-user's intelligent electric meter system |
| CN109784900A (en) * | 2018-12-28 | 2019-05-21 | 金卡智能集团股份有限公司 | A kind of charging method at times based on calendar watch |
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