CN2924671Y

CN2924671Y - Community automatic meter-reading system

Info

Publication number: CN2924671Y
Application number: CN 200620109890
Authority: CN
Inventors: 李乐天
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-01-28
Filing date: 2006-01-28
Publication date: 2007-07-18
Anticipated expiration: 2016-01-28

Abstract

The utility model relates to a district automatic meter reading system, which comprises a computer control management system. The utility model is characterized in that the district automatic meter reading system also comprises a concentrator, a watt hour meter, a water meter with RF unit and a gas meter with RF unit. Wherein, the district computer control management system is connected with the concentrator through a mode of PSTN or GPRS. The concentrator is connected with a plurality of watt hour meters through the mode of RF and/or PLC. The watt hour meter is connected with the corresponding water meter and/or gas meter with the RF unit through the mode of RF. Each watt hour meter is connected with each other through the mode of RF and PLC. The utility model achieves the two-way, high-speed and reliable communication between the computer control management system and the water meter and also between the watt hour meter and the gas meter, which greatly improves the work efficiency of the meter reading and charging. The utility model is easy to install and use, and achieves the remote automatic control and online monitoring of the water meter, watt hour meter and gas meter, which provides a scientific and practical solution for the improvement of the management level of the unit or district meter reading and charging.

Description

The sub-district Automatic meter reading system

Affiliated technical field

The utility model relates to water meter, ammeter and gas meter centralized management, automatic monitored control system, specifically is a kind of sub-district Automatic meter reading system that is applicable to the sub-district to water meter, ammeter and gas meter centralized management.

Background technology

As everyone knows, water meter in domestic many administrative institutions, industrial enterprise, universities and colleges and the property sub-district, electric energy meter, gas meter are all by our unit or sub-district property oneself management at present, unify relevant industries administrative authority, that is: Running-water Company, Utilities Electric Co. and gas company.At present, because the management of these three industries is all established one's own system, three systems fight separately, carry out the work by the management mode of own industry separately, though many similarities are arranged on the problem of checking meter, because trade management can't form resource sharing.Because water meter, ammeter are different with gas meter characteristic separately, the water meter of each household and gas meter generally all are installed in indoor, ammeter is installed in outdoor, the meter reading personnel must arrive every household and copy consumption (water, electricity, gas can be checked meter respectively separately sometimes, and water meter, gas meter meter reading personnel must enter the indoor consumption of copying of every household); Very trouble is bothersome again.Meter reading efficiency is low like this, and labour intensity is big, also may miscopy data because of human error, causes some contradictions; Institute's data of copying are by meter reading personnel unit of taking back or sub-district relevant departments aggregation process, and result notifies the user to pay dues to the appointed place again.Because other daily schedule difference of each household, the commuter time is different, adds reason such as may travel outside, and makes the meter reading personnel usually walk dead circuit, repeatedly all can't finish the work of checking meter to the doorstep, influences the normal progress of whole counting cost by gas meter work; Again because the user does not directly face trade management department, when unit or sub-district use total amount and each family consumption sum total gap to occur, need the user to share, cause the rising of unit price, cause the contradiction of user and user, user and unit or sub-district, influence neighborhood relationship and harmonious atmosphere; In addition; difference along with people's habits and customs; personalized requirement is more and more higher; the enhancing of protection individual privacy and antitheft consciousness; also can increase the meter reading personnel and enter the difficulty that user family checks meter; increase bigger thought pressure to the meter reading personnel virtually, directly influenced the efficient and the service quality of counting cost by gas meter.Present counting cost by gas meter mode mainly is manually to copy and accept, progressively to use prepayment mode and reconnaissance to try out Automatic meter reading system among a small circle.The use of prepayment mode (prepayment meter, prepay water meter and pre-payment gas meter), can reduce the pressure of counting cost by gas meter in reason, make things convenient for the user, but because the different characteristics and different way to manages of water, electricity, gas, add that administrative authority is different to the understanding of these three kinds of prepayment modes with the user separately, make water meter, ammeter, gas meter adopt the possibility of prepayment mode to reduce greatly simultaneously, seldom occur in the practical application, as long as there is a kind of table not adopt prepayment mode, the meter reading personnel checks meter just inevitable to the doorstep.In addition, the Automatic meter reading system of pilot also all is to be undertaken by three industries characteristics separately at present, except the reliability and practicality of system itself, also there is a critical defect, that is exactly: it is inconceivable that same unit or sub-district are moved the dissimilar Automatic meter reading system of three covers simultaneously, so both wasted resource, increase construction cost, cause inter-system interference again easily, generation system confusion, simultaneously, have equally that administrative authority and user are to the problem of perception of Automatic meter reading system separately, therefore, it is impossible adopting three cover Automatic meter reading system in a unit or sub-district, and only use a kind of Automatic meter reading system real unit of solution or sub-district problem of checking meter in essence, say in a sense that for unit or sub-district be a kind of wasting of resources.So well the unit of solution or sub-district automatic data logging problem have only the barrier of breaking through three kinds of trade management patterns, three problems of checking meter of unit or sub-district water meter, ammeter and gas meter are changed into the problem of checking meter, so just can set up the complete Automatic meter reading system of a cover, unification is carried out automatic data logging charge and management to water meter, ammeter and gas meter; Could really solve the problems that existing manual metering exists like this, raise labour productivity, improve service quality, overcome the human error, new step in the work of checking meter of the unit of making or sub-district is for unit or sub-district counting cost by gas meter are set up the new pattern of management that a cover science is suitable for.

Summary of the invention

For the unit of making or sub-district counting cost by gas meter convenient, quick, raise the management level, service-user, utilize the relevant results new technology of present stage, the purpose of this utility model provides and a kind ofly is the Automatic meter reading system of one, that is: sub-district Automatic meter reading system (hereinafter to be referred as DAMR) with water meter, ammeter and gas meter three are molten.The automatic data logging work of the unit of making or sub-district is unified in the computer control system and finishes.It has crossed over the obstacle that the water, electricity, gas management separates, and has broken through the barrier that water, electricity, gas are managed independently in unit or sub-district separately, under the support of correlation technique, has realized resource sharing.On unified computer management system platform, finish the automatic data logging Control work of water meter, ammeter and gas meter.Check meter many defectives of existing in the work and use inconvenience of present unit or sub-district had both been remedied, well solved the fusion problem of three management systems again, the real needs of unit or cell management have well been satisfied, the real robotization that realizes unit or the management of sub-district counting cost by gas meter is for unit or sub-district Automatic meter reading system are opened up a scientific and effective new way.

Technical scheme

For the unit of making or scientific and effective, the practicality more more of sub-district automatic data logging control system, the utility model proposes the general idea that the RF technology is combined with PLC technology and GPRS technology, these technology are organically merged, make up an alignment real time bidirectional, communication speed is fast, efficient is high, safe and reliable, easy to install sub-district Automatic meter reading system.Particularly in the system designing requirement of ammeter head and shoulders above the notion of ordinary electric meter, it not only possesses the function of measuring of ordinary electric meter, is also undertaking uploading of water meter, gas meter data and is assigning and communication relay task (all including the RF unit in gas meter here and the water meter).

According to technique scheme, this sub-district Automatic meter reading system (DAMR) comprises the water meter of computer control managing system, concentrator, ammeter, band RF unit and the gas meter of band RF unit; Wherein be connected by PSTN or GPRS mode between sub-district computer control managing system and the concentrator; Concentrator is connected with several ammeters by RF mode and/or PLC mode, and ammeter is connected with gas meter with corresponding water meter by the RF mode; Finish control and management to ammeter, water meter and gas meter; Be connected with each other by RF mode and PLC mode between each ammeter.

Above-mentioned sub-district Automatic meter reading system (DAMR) also can comprise computer control managing system, concentrator, ammeter, band RF unit water meter, band RF unit gas meter and three-phase multifunctional ammeter; Described computer control managing system directly is connected with several three-phase multifunctional ammeters by GPRS, or passes through the RS485 interface through concentrator and be connected with the three-phase multifunctional ammeter, finishes control and management to the three-phase multifunctional ammeter.

Described concentrator has RS485 and IR, USB interface, and RS485 connects the three-phase multifunctional ammeter, and at least a interface among IR, the USB is connected with field apparatus.The quasi real time Automatic meter reading system that constitutes with computer control managing system, concentrator, ammeter, water meter and gas meter has just been realized the functions such as supervision, control, function conversion and information feedback to sub-district water meter, ammeter and gas meter like this.

The principle of work of said system: in sub-district Automatic meter reading system (DAMR), unit or sub-district computer control managing system be as staff's operating platform, utilizes relevant application program to finish control and management to whole DAMR system.The computer control managing system be copied go back to and be passed to concentrator should also will with the data in the ammeter by RF mode and PLC mode by the instruction of PSTN or GPRS receiving computer control management system; Again according to the variation of environment, best communication route between study and selection and the ammeter and best communication modes (RF mode or PLC mode), also to get ready at any time simultaneously, by IR or USB and field apparatus swap data, by RS485 and three-phase multifunctional ammeter swap data.The ammeter role head and shoulders above electric energy metrical, it not only will finish electric energy metrical, cooperates concentrator to realize best communication route and best communication modes (RF mode or PLC mode), cooperates concentrator to realize communication relaying between the ammeter; Also to change the data of copying water meter and gas meter, and steering order is transmitted to water meter and gas meter, simultaneously it also will improve antijamming capability by changing communication channel according to environmental change, improves the communication efficiency of ammeter and water meter and gas meter, assurance the water meter of copying and gas meter data safe and reliable.And water meter here and gas meter, they are except measuring, also have solenoid valve and RF unit, they are only kept in communication by the RF mode with corresponding ammeter, by improving antijamming capability with ammeter synchronous change communication channel, swap data, and execution is mutually controlled " order " and is removed to control water meter and gas meter.Become quasi real time Control Network System by unit or sub-district computer control managing system, concentrator, ammeter, water meter and gas meter mutual group, the all functions of the unit of finishing or sub-district Automatic meter reading system bring a qualitative leap for the management of checking meter of present unit or sub-district.

Technique effect of the present utility model is significant, the sub-district Automatic meter reading system (DAMR) that constitutes by above-mentioned principle, realized the two-way, at a high speed and communication reliably of unit or sub-district computer control managing system and water meter, ammeter and gas meter, the communication efficiency height, antijamming capability is strong, set up the network platform of unit or sub-district water meter, ammeter and gas meter three table unifications, improved the work efficiency of counting cost by gas meter greatly; Cross over the management barrier of water meter, ammeter and gas meter counting cost by gas meter, really realized the Automatic meter reading system of water meter, ammeter and gas meter three table unifications; Realize the automatic login of water meter, ammeter, gas meter and withdrawed from automatic prompting, easy to install; Realized (being that water meter, ammeter and gas meter can both be changed on demand automatically by programming) controlled in the distant place of water meter, ammeter and gas meter automatically between common metering and prepayment mode; Realized the quasi real time in-service monitoring of three table running statuses; For unit or sub-district counting cost by gas meter management development provide a science practical solution.

Description of drawings

Said structure of the present utility model can further specify by the embodiment that accompanying drawing provides.

The utility model has following accompanying drawing:

Accompanying drawing 1 is the structured flowchart of sub-district Automatic meter reading system;

Accompanying drawing 2 is the ammeter structure principle chart;

Accompanying drawing 3 is the water meter structure schematic diagram;

Accompanying drawing 4 is the gas meter structure principle chart;

Accompanying drawing 5 is the concentrator structure schematic diagram;

Accompanying drawing 6 is the computer control managing system architecture diagram;

Accompanying drawing 7 is a PLC element circuit schematic diagram;

Accompanying drawing 8 is a RF element circuit schematic diagram.

Embodiment

Referring to accompanying drawing 1, the sub-district Automatic meter reading system comprises computer control managing system, concentrator, ammeter and water meter, gas meter (having omitted power unit among the figure) among the figure, and wherein the computer control managing system comprises computer system, GPRS and PSTN, grid line; One of them connects concentrator by GPRS, PSTN in the computer control managing system, receives ammeter data and sending controling instruction by concentrator.Concentrator comprises Single Chip Microcomputer (SCM) system, GPRS and PSTN, IR and USB and RS485 interface, RF unit and PLC unit, and concentrator is connected ammeter by the RF unit with the PLC unit, receives ammeter data and sending controling instruction; Be connected with the three-phase multifunctional table with field apparatus with USB and RS485 by IR, accept initialization data and send ammeter data.Ammeter comprises metering units, magnetic latching relay, Single Chip Microcomputer (SCM) system, RF unit, PLC unit, is connected with gas meter with water meter by the RF unit, receives the data and the sending controling instruction of water meter and gas meter; Be connected with the PLC unit by the RF unit between the ammeter, realize the communication relaying.It is the three-phase multifunctional ammeter of DSSD188 band RS485 interface that described three-phase multifunctional table can adopt model.

Referring to accompanying drawing 2, ammeter is single-phase ammeter (or three-phase kilowatt-hour meter) among the figure, and described ammeter all has stealing warning output function.Wherein single-phase ammeter comprises RF unit, PLC unit, metering units, switch and Single Chip Microcomputer (SCM) system (having omitted power unit among the figure); The single-phase ammeter of the metering units of ammeter adopts ADE7751 chip (three-phase kilowatt-hour meter adopts the ADE7752 chip); Input AC220v receives the sampling end of ammeter and the communication channel of PLC unit respectively; The ac output end of ammeter is by exporting as exchanging AC220v behind the magnetic latching relay.The metrical pulse of ammeter unit and stealing warning pulse connect Single Chip Microcomputer (SCM) system I/O mouth, as the metering and the alerting signal of Single Chip Microcomputer (SCM) system; Single Chip Microcomputer (SCM) system opens or closes by I/O mouth line traffic control magnetic latching relay, and shows electric quantity data; Single Chip Microcomputer (SCM) system is connected with the PLC unit with the RF unit by bus, the duty of control RF unit and PLC unit; Ammeter is connected with concentrator with the PLC mode by the RF mode, realizes exchanges data; Ammeter interconnects by RF mode and PLC mode, realizes the communication relaying between the ammeter; Ammeter is connected with gas meter with water meter by the RF mode, realizes the exchanges data (three-phase kilowatt-hour meter input power supply is three-phase AC380v, and except that metering units was different with single-phase ammeter, remainder was the same substantially) of ammeter and water meter and gas meter.

Referring to accompanying drawing 3, water meter comprises pulse water meter, Single Chip Microcomputer (SCM) system, RF unit and solenoid valve among the figure.Wherein the metrical pulse output terminal of pulse water meter connects the I/O mouth line of Single Chip Microcomputer (SCM) system, and solenoid valve is connected on the outlet conduit of pulse water meter, and its control end is connected with the I/O mouth line of Single Chip Microcomputer (SCM) system, and Single Chip Microcomputer (SCM) system connects the RF unit by serial ports.The course of work is: water flows into the pulse water meter earlier, flows out by solenoid valve again; Single Chip Microcomputer (SCM) system links to each other with pulse water meter metrical pulse end by I/O mouth line, receives metrical pulse and shows water consumption; Connect solenoid valve, control electromagnetic valve switch by I/O mouth line; By serial ports control RF unit, realize exchanges data with ammeter.It is LXLJ-50 type pulse water meter that described pulse water meter can adopt model.

Referring to accompanying drawing 4, gas meter comprises pulse gas meter, Single Chip Microcomputer (SCM) system, RF unit and solenoid valve among the figure.Wherein the metrical pulse output terminal of pulse gas meter connects the I/O mouth line of Single Chip Microcomputer (SCM) system, and solenoid valve is connected on the outlet side of pulse gas meter, and its control end is connected with the I/O mouth line of Single Chip Microcomputer (SCM) system, and Single Chip Microcomputer (SCM) system connects the RF unit by serial ports.Wherein combustion gas water flows into the pulse gas meter earlier, flows out by solenoid valve again; Single Chip Microcomputer (SCM) system links to each other with pulse gas meter metrical pulse end by I/O mouth line, receives metrical pulse and shows gas consumption; Connect solenoid valve, control electromagnetic valve switch by I/O mouth line; By serial ports control RF unit, realize exchanges data with ammeter.It is CGZ-GM1.6 type pulse gas meter that described pulse gas meter can adopt model.

Referring to accompanying drawing 5, concentrator comprises Single Chip Microcomputer (SCM) system, hardware clock, RF unit, PLC unit, power unit, GPRS (PSTN) and IR (USB, RS485) interface among the figure.Wherein AC380v is as the input power supply and the PLC communication channel of power unit; Power unit provides working power for all unit and interface in the concentrator; Single Chip Microcomputer (SCM) system is connected with GPRS (PSTN), IR, USB, RS485, RF unit and PLC unit by serial ports; Concentrator is connected with the computer control managing system by GPRS, PSTN (one of them), transmits the instruction of ammeter data and receiving computer; Concentrator is connected with the three-phase multifunctional ammeter with field apparatus with the RS485 interface by IR, USB (any), on-the-spot instruction and the transmission data of receiving; Concentrator receives ammeter data and sends instruction to ammeter by RF unit and PLC unit.

Referring to accompanying drawing 6, the computing machine control management system comprises computer system, grid line and GPRS, PSTN among the figure.Wherein computer system is connected with GPRS, PSTN by serial ports; Link to each other with higher level's LAN (Local Area Network) by grid line.The computer control managing system utilizes GPRS or PSTN to be connected with concentrator, receives ammeter data and sends instruction to ammeter; Utilize GPRS directly to be connected, carry out exchanges data with the three-phase multifunctional ammeter; Simultaneously, utilize grid line and higher level's LAN (Local Area Network) swap data.

Referring to accompanying drawing 7, the PLC unit comprises the coupling circuit that TR, C4 form among the figure; The power amplifier that L1, C3, V1, V2, V3, V4, R1, R2, C1, C2 etc. form; The frequency selection circuit that C6, D7, D6, L2, C5, R3 form; FLT1, FLT2 consider ripple device, serial ports and PL3105 (communication special chip) for band is logical.The PLC unit is connected with external microcontroller system serial ports by serial ports, is connected with the AC220v electrical network with C4 by TR; Power amplifier connects coupling circuit by L1, connects the SIGOUT of PL3105 by C1, C2; Frequency selection circuit connects coupling circuit by R3, C5, connects the SININ of PL3105 by C6.When the PLC unit sent information, the external microcontroller system to the PL3105 writing information, after the PL3105 modulation, by the power amplifier amplifying signal, was coupled to signal on the AC220v electrical network through coupling circuit by serial ports again; When the PLC unit received data, the information on the AC220v electrical network was passed to frequency selection circuit through coupling circuit, is passed to the SIGIN of PL3105 again by C6, after the PL3105 demodulation, is sent to Single Chip Microcomputer (SCM) system by serial ports, finishes the information transmit-receive function of PLC unit.Described external microcontroller system is the Single Chip Microcomputer (SCM) system such as the PIC16F64 of ammeter.For concentrator, the PLC unit interior with being installed in ammeter, its PLC unit structurally is the same, and its external microcontroller system with respect to the PLC unit is exactly to be the Single Chip Microcomputer (SCM) system of LPC2214 as model.

Referring to accompanying drawing 8, among the figure RF unit comprise the LC wave filter, the RF communicating circuit and the single-chip microcomputer PL3103 of the frequency selection circuit formed by C31, C42, L41, L32, the band clock circuit formed by L101 inductance, C171, C181, XTAL and chip CC1000.Frequency selection circuit C31, C42 connect antenna through the LC wave filter, and the RFIN that connects CC1000 (special-purpose communication chip) through C31, L32 holds, and connect the RFOUT of CC1000 through C42, C41, L41; The RSSI/IF of CC1000, PALE, PDATE, PCLK, DCLK, DIO connect AD1, P12, P13, P15, P16, the P35 of single-chip microcomputer respectively, and antenna impedance is 50 Europe.When the RF unit received data, signal through the frequency selection circuit frequency-selecting, by the RFIN end that C31, L32 send CC1000, by sending PL3103 to after the CC1000 demodulation, was passed to the external microcontroller system by serial ports again after antenna induction and filtering; When the RF unit sent data, the external microcontroller system by the PL3103 serial ports, write the CC1000 chip with data, after the CC1000 modulation, behind RFOUT end process frequency selection circuit and wave filter, launched by antenna again, finished the transmission-receiving function of information.The described external microcontroller system here is the Single Chip Microcomputer (SCM) system such as the PIC16C57 of the Single Chip Microcomputer (SCM) system of ammeter such as PIC16F64 or water meter, gas meter, or the Single Chip Microcomputer (SCM) system LPC2214 of concentrator.For concentrator, ammeter, water meter and gas meter, its RF unit structurally is the same.

Claims

1, a kind of sub-district Automatic meter reading system comprises the computer control managing system, it is characterized in that: also comprise the water meter of concentrator, ammeter, band RF unit and the gas meter of band RF unit; Wherein be connected by PSTN or GPRS mode between sub-district computer control managing system and the concentrator; Concentrator is connected with several ammeters by RF mode and/or PLC mode, and ammeter is connected by the water meter and/or the gas meter of RF mode with corresponding band RF unit; Be connected with each other by RF mode and PLC mode between each ammeter.

2, sub-district according to claim 1 Automatic meter reading system, it is characterized in that: system also comprises the three-phase multifunctional ammeter, described computer control managing system directly is connected with several three-phase multifunctional ammeters by GPRS, or be connected with the three-phase multifunctional ammeter by the RS485 interface through concentrator, finish control and management to the three-phase multifunctional ammeter.

3, sub-district according to claim 1 Automatic meter reading system, it is characterized in that: the computer control managing system comprises computer system, GPRS or PSTN; The computer control managing system connects concentrator by GPRS or PSTN, receives ammeter data and sending controling instruction by concentrator.

4, sub-district according to claim 1 Automatic meter reading system, it is characterized in that: concentrator comprises Single Chip Microcomputer (SCM) system, hardware clock, RF unit, PLC unit, power unit, GPRS, PSTN and IR, USB, RS485 interface; Wherein with input power supply and the PLC communication channel of AC380v as power unit; Power unit provides working power for all unit and interface in the concentrator; Single Chip Microcomputer (SCM) system is connected with GPRS, PSTN, IR, USB, RS485, RF unit and PLC unit by serial ports; Concentrator is connected with the computer control managing system by GPRS or PSTN, transmits the instruction of ammeter data and receiving computer; Concentrator links to each other with field apparatus by any interface of IR, USB, on-the-spot instruction and the transmission data of receiving; Concentrator passes through the RF unit or/and the PLC unit receives ammeter data and sends instruction to ammeter; Concentrator is connected with the three-phase multifunctional ammeter by RS485, finishes the exchanges data with the three-phase multifunctional ammeter.

5, sub-district according to claim 1 Automatic meter reading system is characterized in that: described PLC unit comprises that coupling circuit, power amplifier, frequency selection circuit, intermediate frequency consider ripple device, serial ports and communication chip (PL3105); The coupling circuit of forming by transformer (TR), electric capacity (C4) wherein; The power amplifier of forming by inductance (L1), triode (V1, V2, V3, V4), resistance (R1, R2), electric capacity (C1, C2, C3); The frequency selection circuit of forming by diode (D7, D6), inductance (L2), electric capacity (C5, C6), resistance (R3); The PLC unit is connected with external microcontroller system serial ports by serial ports, is connected with the AC220v electrical network by coupling circuit; Power amplifier connects coupling circuit by inductance (L1), connects the SIGOUT end of communication chip (PL3105) by electric capacity (C1, C2); Frequency selection circuit connects coupling circuit by (R3, C5), connects the SININ end of communication chip (PL3105) by (C6); When the PLC unit sent information, the external microcontroller system to the communication chip writing information, after the communication chip modulation, by the power amplifier amplifying signal, was coupled to signal on the AC220v electrical network through coupling circuit by serial ports again; When the PLC unit received data, the information on the AC220v electrical network was passed to frequency selection circuit through coupling circuit, was passed to the SIGIN end of communication chip again by electric capacity (C6), after the communication chip demodulation, was sent to Single Chip Microcomputer (SCM) system by serial ports, finished the information transmit-receive of PLC unit.

6, sub-district according to claim 1 Automatic meter reading system is characterized in that: frequency selection circuit, band clock circuit communicating circuit and Single Chip Microcomputer (SCM) system that described RF unit comprises the LC wave filter, is made up of electric capacity (C31, C42), inductance (L41, L32); Wherein frequency selection circuit connects antenna by electric capacity (C31, C42) through the LC wave filter, and the RFIN that connects RF communication chip (CC1000) through electric capacity (C31), inductance (L32) holds, and connects the RFOUT end of communication chip through electric capacity (C42, C41), inductance (L41); When the RF unit receives data, signal is after antenna induction and filtering, through the frequency selection circuit frequency-selecting, deliver to the RFIN end of RF communication chip (CC1000) by electric capacity (C31), inductance (L32), by sending single-chip microcomputer (PL3103) to after communication chip (CC1000) demodulation, pass to the external microcontroller system by serial ports again; When the RF unit sent data, the external microcontroller system by the PL3103 serial ports, write the RF communication chip with data, after the modulation of RF communication chip, behind RFOUT end process frequency selection circuit and wave filter, launched by antenna, finished the transmission-receiving function of information.

7, sub-district according to claim 1 Automatic meter reading system, it is characterized in that: described ammeter adopts single-phase ammeter or the three-phase kilowatt-hour meter with stealing warning output function, and wherein single-phase ammeter comprises RF unit, PLC unit, metering units, switch and Single Chip Microcomputer (SCM) system; The communication channel of the sampling end of ammeter and PLC unit connects input AC220v electrical network respectively; The ac output end of ammeter is exported as exchanging AC220v by magnetic latching relay; The metrical pulse of ammeter unit and stealing warning pulse connect the I/O mouth of Single Chip Microcomputer (SCM) system, as the metering and the alerting signal of Single Chip Microcomputer (SCM) system; Single Chip Microcomputer (SCM) system is connected with the PLC unit with the RF unit by serial ports, opens or closes by I/O mouth line traffic control magnetic latching relay, and shows electric quantity data; Ammeter interconnects by RF unit and PLC unit, realizes the communication relaying; Send and receive the information of concentrator by RF unit and PLC unit, and send and the water meter of receiving belt RF unit or be with the information of the gas meter of RF unit by the RF unit.

8, sub-district according to claim 1 Automatic meter reading system, it is characterized in that: the water meter of described band RF unit comprises pulse water meter, Single Chip Microcomputer (SCM) system, RF unit and solenoid valve, wherein the metrical pulse output terminal of pulse water meter connects the I/O mouth line of Single Chip Microcomputer (SCM) system, solenoid valve is connected on the outlet conduit of pulse water meter, its control end is connected with the I/O mouth line of Single Chip Microcomputer (SCM) system, and Single Chip Microcomputer (SCM) system connects the RF unit by serial ports; And by RF unit and ammeter swap data.

9, sub-district according to claim 1 Automatic meter reading system, it is characterized in that: the gas meter of described band RF unit comprises pulse gas meter, Single Chip Microcomputer (SCM) system, RF unit and solenoid valve, wherein the metrical pulse output terminal of pulse gas meter connects the I/O mouth line of Single Chip Microcomputer (SCM) system, solenoid valve is connected on the outlet side of pulse gas meter, its control end is connected with the I/O mouth line of Single Chip Microcomputer (SCM) system, and Single Chip Microcomputer (SCM) system connects the RF unit by serial ports; And by RF unit and ammeter swap data.