Based on the single-phase intelligent of the 3G network control system of checking meter
Technical field
The present invention relates to domestic intelligent ammeter field, be specifically related to a kind of single-phase intelligent network control system of checking meter based on 3G.
Background technology
As far back as 2008, intelligent grid has begun to become one of project that global many countries pay attention to.Nowadays, as the important channel of Economic Stimulus scheme, intelligent grid and the intelligent electric meter that is driven thereof are supported for the U.S., European many government departments energetically.In China, the basis that intelligent electric meter becomes intelligent grid already one of is equipped with, and is playing the part of intelligent grid development forerunner's role.China has been the 5th time intelligent electric meter bid to be published a list of successful candidates 8 hundred million of bid total values by on Dec 15th, 2011.The country of reality in 2011 is 5,970 ten thousand to the bid total amount of intelligent electric meter.
From global metadata trend, in order to control power condition effectively, intelligent electric meter also launches in the deployment and the construction of global various countries in high gear.A few days ago, Parker consulting firm of the market research agency (Pike Research) has issued the report of a " intelligent electric meter market forecast " by name, shows in the report, and following 10 years, global intelligent electric meter installation will increase about 4 times.Parker statistics claims that by the end of the year 2011, global intelligent electric meter is installed quantity will reach 2.51 hundred million, estimates that this numeral in 2015 will double, and rises to 5.35 hundred million, possibly reach about 1,000,000,000 scale to the year two thousand twenty.Report points out that especially this industry will rapidly emerge market, Asia, particularly in China.
Summary of the invention
Technical matters to be solved by this invention provides a kind of distribution and development that can promote electric energy management industry rational management and balance electric energy; Adopt multiple innovative technology, the single-phase intelligent of supporting electric energy management department to tackle the challenge that Chinese electrical network unbalanced supply-demand present situation brings to industry flexibly, rationally, the effectively network control system of checking meter based on 3G.
Based on the single-phase intelligent of the 3G network control system of checking meter; It is characterized in that: include a primary module and a plurality of sub-module; Described primary module, sub-module have included control module, signal conditioning circuit, single-phase electric energy acquisition module; The main control chip of described control module is a single-chip microcomputer; Signal conditioning circuit includes voltage signal modulate circuit, current signal modulate circuit; The single-phase electric energy acquisition module includes the electric energy acquisition chip; The voltage of the single-phase electrical network of resident, current signal output end insert the signal input part of voltage signal modulate circuit, current signal modulate circuit respectively, and the signal output part of voltage signal modulate circuit, current signal modulate circuit inserts the input pin of the electric energy acquisition chip of single-phase electric energy acquisition module, the single-chip microcomputer of the output pin Access Control module of the electric energy acquisition chip of single-phase electric energy acquisition module; Described primary module also includes communication module, 3G wireless transport module, I2C module, rf read-write device module, real-time clock synchronization module, keyboard and display module; Described communication module includes CAN telecommunication circuit, 485 telecommunication circuits, CAN connecting line, 485 connecting lines; The single-chip microcomputer of the control module of described primary module is connected with 3G wireless transport module, I2C module, rf read-write device module, real-time clock synchronization module, keyboard and display module respectively, and the single-chip microcomputer of the control module of described primary module is connected with the single chip communication of the control module of each sub-module through CAN telecommunication circuit, CAN connecting line, 485 telecommunication circuits, 485 connecting lines.
The single-chip microcomputer of described control module adopts 16 8-digit microcontroller MC9S12X-Sl28 Freescale single-chip microcomputers.
Described voltage signal modulate circuit includes voltage transformer (VT), frequency overlapped-resistable filter one, and the current signal modulate circuit includes current transformer, frequency overlapped-resistable filter two; The voltage of the single-phase electrical network of resident, current signal output end insert the AC signal input end of voltage transformer (VT), current transformer respectively; Voltage transformer (VT) cross-over connection resistance R 1o; The two ends of resistance R 1o are connected with resistance R 1a, the R1b of frequency overlapped-resistable filter one respectively; Capacitor C 1a, the C1b of two series connection of cross-over connection between resistance R 1a, the R1b; The capacitor C 1a of series connection, the two ends of C1b are connected with resistance R 2a, R2b respectively, current transformer cross-over connection resistance R 3o, and the two ends of resistance R 3o are connected with resistance R 3a, the R3b of frequency overlapped-resistable filter two respectively; Capacitor C 3a, the C3b of two series connection of cross-over connection between resistance R 3a, the R3b, the capacitor C 3a of series connection, the two ends of C3b are connected with resistance R 4a, R4b respectively.
Described single-phase electric energy acquisition module includes electric energy acquisition chip, electrical energy pulse signal display circuit; Resistance R 2a in the voltage signal modulate circuit, R2b insert the VREFA pin of the electric energy acquisition chip of single-phase electric energy acquisition module; The capacitor C 1a of series connection, the two ends of C1b are received voltage differential input pin V3P, the V3N of electric energy acquisition chip respectively; Resistance R 4a in the current signal modulate circuit, R4b insert the VREFA pin of the electric energy acquisition chip of single-phase electric energy acquisition module, and current-differencing input pin V2P, the V2N of electric energy acquisition chip received at the capacitor C 3a of series connection, the two ends of C3b respectively; The output pin CF1 of electric energy acquisition chip, CF2, CF3 insert LED light LED-S, LED-P, the LED-Q of electrical energy pulse signal display circuit respectively through resistance R S, RP, RQ, the output pin SPICLK of electric energy acquisition chip, SPIDO, SPIDI, SPICS, IRQ connect PB3, PB2, PB1, PB0, the PB4 pin of single-chip microcomputer respectively.
The main chip of described CAN driving circuit is 82C250; 485 telecommunication circuits 10 include three photoelectrical couplers, level transferring chip, four Transient Suppression Diodes and two negative tempperature coefficient thermistors; Three photoelectrical couplers are respectively ISO11, ISO12, ISO13; Level transferring chip is 65LN184, and four Transient Suppression Diodes are respectively TVSD1, TVSD2, TVSD3, TVSD4, and two negative tempperature coefficient thermistors are respectively RBUSA, RBUSB.
Be provided with interface circuit between described 3G wireless transport module and the control module; Described interface circuit includes chip MAX232 and computer DB9 plug; The serial ports 1 of single-chip microcomputer inserts the T1IN pin of MAX232; Deliver to computer DB9 plug from T1OUT after converting the RS-232 data to, the RS-232 data of computer DB9 plug convert to after the TTL/CMOS data from R1OUT output and insert the signal input part of 3G wireless transport module from R1IN input.
The circuit of described rf read-write device module mainly is made up of FM1702SL and peripheral circuit thereof; The pin MISO of FM1702SL, SCK, MOSI, NSS, RSTPD link to each other with PA0, PA1, PA2, PA3, the PA4 of single-chip microcomputer respectively, and the emission of radio frequency signals impedance matching circuit of FM1702SL is formed antenna by L3, L4, C11, C12, C13, C14, C15, C16 and made the galley ring circuit by L5, L6 and constitute.
Compared with present technology, beneficial effect of the present invention is:
The concrete technical advantage that the present invention had has following several aspect:
1) the intelligent electric meter networking level to present single-phase residential electricity consumption is low; The not high and complex structure and other problems of intellectuality; The present invention studies technology such as merging microelectronics, computing machine, communication, and that all functions such as electrical parameters detection, tripping mechanism, protection, communication, interface are carried out modularization is integrated; Make full use of present state-of-the-art technology and strengthen the network communicating function of ammeter, improve management of power use level, farthest make things convenient for the user to purchase uses such as electricity, consumption at times.
2) can realize IC-card pre-payment, data acquisition and the far and near process control function of every ammeter in the network; Adopt the contactless IC card of FM1702SL chip; The data that are used for the intrasystem every intelligent electric meter of collection network; Simultaneously can on every ammeter, realize swipe the card pre paid functionality and arrearage control function, the data center of the data upload that collects to management of power use department gathered, analyzes, handles round-the-clockly through 3G network simultaneously.
3) perfect network service redundancy feature, general intelligence table network design adopts RS485 communication protocol.And the present invention mainly communicates by letter and adopts CAN communication protocol.The category that CAN (Controller Area Network) belongs to fieldbus is one of focus of current automatic field technical development, is described as the LAN of automatic field.Its dcs that appears as realizes that real-time between each node, data communication reliably provides powerful technical support.It is the serial communication network of distributed control of a kind of effective support or real-time control.The dcs that makes up than present many RS-485 has obvious superiority based on the dcs of CAN bus in many-side.The present invention still keeps 485 communication networks, and both are subsequent use each other, has greatly improved the reliability of network system, because the ammeter network relates to numerous residents' actual benefit, the communication of assurance Network electric meter is unimpeded to be extremely necessary.
4) adopt 3G high-speed data teletransmission technology, in real time with the user with electrographic recording, electricity consumption time, the pre-payment amount of money, dump energy, remaining sum etc. data in time upload to management of power use department so that control with make a strategic decision.Have the electrification carrier wave to carry out the system that data are checked meter at present, but because the inherent shortcoming of power carrier circuit is difficult to accomplish the high-accuracy of data.In case of thunderstorm or extreme hazard weather just be difficult to guarantee the unimpeded of communication with accurately, and communication distance also receives very big restriction, long-distance transmissions must add relaying.And 3G communication is based on the common carrier of specialty and has perfect communication support system can realize the undisturbed long-distance meter-reading system of high-speed real-time; And communication does not receive the restriction of distance; Use the 3G module of special exploitation, as long as can both realize 3G communication in the place that Office of the Telecommunications Authority's signal can cover.
5) the present invention does not adopt every ammeter of present intelligence table that the design of card reader is arranged; And adopt each LAN to have only a rf read-write device is arranged in the primary module; Each intelligent card subscriber is as long as swipe the card on the primary module card reader; Intelligence table network system is each intelligent card subscriber of automatic distinguishing, can be automatically after having verified user's information and password with user's data storage in the electric supply meter of correspondence.This intelligent electric meter can also use the stealing warning function in addition, if the user needs and can also information such as user's dump energy, arrearage prompting be sent to (user need provide and accept phone number to management of power use department certainly) on the user mobile phone through 3G.
Description of drawings
Fig. 1 is an one-piece construction synoptic diagram of the present invention.
Fig. 2 is the circuit diagram of voltage signal modulate circuit of the present invention.
Fig. 3 is the circuit diagram of current signal modulate circuit of the present invention.
Fig. 4 is the circuit diagram of single-phase electric energy acquisition module of the present invention.
Fig. 5 is the circuit diagram of CAN telecommunication circuit of the present invention.
Fig. 6 is the circuit diagram of 485 telecommunication circuits of the present invention.
Fig. 7 is the circuit diagram of the interface circuit between 3G wireless transport module of the present invention and the control module.
Fig. 8 is the circuit diagram of FM1702SL rf read-write device module of the present invention.
Embodiment
In order further to understand content of the present invention, characteristics and effect, existing conjunction with figs. is explained the present invention in detail as follows:
As shown in Figure 1; Based on the single-phase intelligent of the 3G network control system of checking meter; Include a primary module and a plurality of sub-module; Primary module, sub-module have included control module 1, signal conditioning circuit 2, single-phase electric energy acquisition module 3; The main control chip of control module 1 is a single-chip microcomputer; Signal conditioning circuit 2 includes voltage signal modulate circuit, current signal modulate circuit, and single-phase electric energy acquisition module 3 includes the electric energy acquisition chip, and the voltage of the single-phase electrical network of resident, current signal output end insert the signal input part of voltage signal modulate circuit, current signal modulate circuit respectively; The signal output part of voltage signal modulate circuit, current signal modulate circuit inserts the input pin of the electric energy acquisition chip of single-phase electric energy acquisition module 3, the single-chip microcomputer of the output pin Access Control module 1 of the electric energy acquisition chip of single-phase electric energy acquisition module 3; Primary module also includes communication module, 3G wireless transport module 4, I
2C module 5, rf read-write device module 6, real-time clock synchronization module 7, keyboard and display module 8; Communication module includes CAN telecommunication circuit 9,485 telecommunication circuits 10, CAN connecting line 11,485 connecting lines 12; The single-chip microcomputer of the control module 1 of primary module is connected with 3G wireless transport module 4, I2C module 5, rf read-write device module 6, real-time clock synchronization module 7, keyboard and display module 8 respectively, and the single-chip microcomputer of the control module 1 of primary module is connected with the single chip communication of the control module of each sub-module through CAN telecommunication circuit 9, CAN connecting line 11,485 telecommunication circuits 10,485 connecting lines 12.
The single-chip microcomputer of control module 1 adopts 16 8-digit microcontroller MC9S12X-Sl28 Freescale single-chip microcomputers.
Like Fig. 2, shown in 3, the voltage signal modulate circuit includes voltage transformer (VT), frequency overlapped-resistable filter one, and the current signal modulate circuit includes current transformer, frequency overlapped-resistable filter two; The voltage of the single-phase electrical network of resident, current signal output end insert the AC signal input end of voltage transformer (VT), current transformer respectively; Voltage transformer (VT) cross-over connection resistance R 1o; The two ends of resistance R 1o are connected with resistance R 1a, the R1b of frequency overlapped-resistable filter one respectively; Capacitor C 1a, the C1b of two series connection of cross-over connection between resistance R 1a, the R1b; The capacitor C 1a of series connection, the two ends of C1b are connected with resistance R 2a, R2b respectively, current transformer cross-over connection resistance R 3o, and the two ends of resistance R 3o are connected with resistance R 3a, the R3b of frequency overlapped-resistable filter two respectively; Capacitor C 3a, the C3b of two series connection of cross-over connection between resistance R 3a, the R3b, the capacitor C 3a of series connection, the two ends of C3b are connected with resistance R 4a, R4b respectively.
As shown in Figure 4, single-phase electric energy acquisition module 3 includes electric energy acquisition chip, electrical energy pulse signal display circuit; Resistance R 2a in the voltage signal modulate circuit, R2b insert the VREFA pin of the electric energy acquisition chip of single-phase electric energy acquisition module; The capacitor C 1a of series connection, the two ends of C1b are received voltage differential input pin V3P, the V3N of electric energy acquisition chip respectively; Resistance R 4a in the current signal modulate circuit, R4b insert the VREFA pin of the electric energy acquisition chip of single-phase electric energy acquisition module, and current-differencing input pin V2P, the V2N of electric energy acquisition chip received at the capacitor C 3a of series connection, the two ends of C3b respectively; The output pin CF1 of electric energy acquisition chip, CF2, CF3 insert LED light LED-S, LED-P, the LED-Q of electrical energy pulse signal display circuit respectively through resistance R S, RP, RQ, the output pin SPICLK of electric energy acquisition chip, SPIDO, SPIDI, SPICS, IRQ connect PB3, PB2, PB1, PB0, the PB4 pin of single-chip microcomputer respectively.
Like Fig. 5, shown in 6; CAN telecommunication circuit 9 includes built-in CAN controller of single-chip microcomputer and CAN driving circuit; The main chip of CAN driving circuit is 82C250; 485 telecommunication circuits 10 include three photoelectrical couplers, level transferring chip, four Transient Suppression Diodes and two negative tempperature coefficient thermistors, and three photoelectrical couplers are respectively ISO11, ISO12, ISO13, and level transferring chip is 65LN184; Four Transient Suppression Diodes are respectively TVSD1, TVSD2, TVSD3, TVSD4, and two negative tempperature coefficient thermistors are respectively RBUSA, RBUSB.
As shown in Figure 7, be provided with interface circuit between the control module 1 of 3G wireless transport module 4 and primary module; Interface circuit includes chip MAX232 and computer DB9 plug; The serial ports 1 of single-chip microcomputer inserts the T1IN pin of MAX232; Deliver to computer DB9 plug from T1OUT after converting the RS-232 data to, the RS-232 data of computer DB9 plug convert to after the TTL/CMOS data from R1OUT output and insert the signal input part of 3G wireless transport module from R1IN input.
As shown in Figure 8; The circuit of rf read-write device module 6 mainly is made up of FM1702SL and peripheral circuit thereof; The pin MISO of FM1702SL, SCK, MOSI, NSS, RSTPD link to each other with PA0, PA1, PA2, PA3, the PA4 of single-chip microcomputer respectively, and the emission of radio frequency signals impedance matching circuit of FM1702SL is formed antenna by L3, L4, C11, C12, C13, C14, C15, C16 and made the galley ring circuit by L5, L6 and constitute.
The present invention adopts master/slave structure, is made up of single-phase intelligent ammeter primary module and some intelligent electric meter sub-modules, carries out data transmission through CAN and 485 buses between sub-module and the primary module.The ammeter primary module is gathered single-phase voltage, real-time current value, meritorious and parameters such as reactive power and power factor; Information such as real-time electricity consumption period of affix; 3G module interface through intelligent electric meter is wirelessly sent to electricity consumption competent authorities with user's power information and period information again; The intelligent electric meter of each user's packing interconnects through the CAN local area network bus mutually by unit or floor even entire building resident family, the unified transmission of intelligent electric meter of primary module is arranged, in order to guarantee the reliability of intelligent electric meter CAN LAN; To this network have increased by 485 communication network savvies; In case the CAN network breaks down, can launch 485 communication networks automatically to guarantee the reliability of local area network communication, both can be subsequent use each other.