CN103927862B - G3 data forwarder and meter recording method for same - Google Patents
G3 data forwarder and meter recording method for same Download PDFInfo
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- CN103927862B CN103927862B CN201410179527.5A CN201410179527A CN103927862B CN 103927862 B CN103927862 B CN 103927862B CN 201410179527 A CN201410179527 A CN 201410179527A CN 103927862 B CN103927862 B CN 103927862B
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Abstract
The invention discloses a G3 data forwarder and a meter recording method for the same. The G3 data forwarder comprises an MCU (master control unit), a PLC (programmable logic controller) modem circuit, an analogue front-end circuit, a line driving circuit, an RS485 circuit, a serial port circuit and a power circuit, wherein the MCU is connected with the PLC modem circuit through a serial port; the PLC modem circuit is connected with the line driving circuit through the analogue front-end circuit; the line driving circuit is connected with a power line; the MCU is connected with the RS485 circuit; the serial port of the MCU is connected with the serial port circuit; the power circuit is used for supplying power to the circuits. According to the G3 data forwarder and the meter recording method for the same, an attenuated carrier signal is firstly amplified and then retransmitted, and data transmitted to a G3 carrier network by a concentrator can be forwarded to a 485 network to indirectly bring electric energy meters adopting an RS485 communication mode into the coverage range of a G3 carrier meter recording system, so that the investment of a client is saved.
Description
Technical field
The present invention relates to a kind of G3 headends and its meter register method.
Background technology
At present, low-pressure side power line communication channel quality very severe, carrier communication quality receives various noises, input impedance
Change, the influence of transmission attenuation factors, therefore power carrier signal is transferred to distant carrier wave meter from concentrator, will
By the baptism of above-mentioned factor, often occur disperseing to install under the carrier signal that concentrator sends can not reach a Ge Tai areas
Carrier electric energy meter problem.Further, since in Automatic meter reading system, except carrier wave meter, carrier wave concentrator, also a large amount of bases
In the electric energy meter that RS485 interfaces are communicated.How by the electric energy meter based on RS485 communications of this large amount of installations, it is integrated into
In the coverage of G3 low-voltage carrier communication systems, realize that electric power copies and accepts business automation again without changing table（485 tables change G3 loads into
Wave table）, it is a problem that all power customers are all paid special attention to.
The content of the invention
It is an object of the invention to provide a kind of communication quality is good and versatility is good G3 headends and its meter register method.
The present invention provide this G3 headends, including main control MCU, PLC circuit, RS485 circuits, serial port circuit and
Power circuit；Main control MCU is connected with PLC circuit, and main control MCU is connected with RS485 circuits；Main control MCU is connected with serial port circuit；Electricity
Source circuit provides power supply for foregoing circuit.
The PLC circuit includes PLC modem circuits, analog front circuit, line drive circuit；PLC modulatedemodulates
Device circuit is adjusted to be connected with line drive circuit by analog front circuit, line drive circuit is connected with power line.The PLC is adjusted
Modulator-demodulator circuit includes G3 modems, and the modem is connected by I/O ports with the I/O ports of the main control MCU
Connect, it is also connected by I/O ports with analog front circuit.The G3 modems use the model of MAXIM companies
The power line communication modem based on OFDM of MAX2992；Including physical layer and MAC layer, MAC layer includes
6LoWPAN layers of IEEE802.15.4-2006 and adaptation；IEEE802.15.4-2006 is used to complete media interviews Access Control；
6LoWPAN layers of adaptation is used to realize that route querying, communication network are set up and data forwarding.The analog front circuit includes
The analog front-end chip based on ofdm signal of the model MAX2991 of MAXIM companies.The line drive circuit includes big electricity
Stream VCOM drives operational amplifier, power amplification circuit, AFE(analog front end) to send data and enables control circuit and carrier wave termination power.
The RS485 circuits include low level transmitted data circuit and high level received data circuit.The serial port circuit includes receiving
Circuit and transtation mission circuit.The power circuit includes AC power supplies circuit and D/C power circuit；D/C power circuit includes 3.3V power supplys
Circuit, 5V power circuits and 15V power circuits.
Meter register method based on G3 headends comprises the following steps：
Step 1, active scan network after electricity on headend；Then registration is initiated to the G3 primary modules of concentrator side,
By the way that after the checking that networks, the headend is registered on the G3 primary modules of the concentrator side, as G3 power line carrier networks
In a node；
Step 2, main website sends message to the G3 primary modules of concentrator side of checking meter；
Step 3, whether the purpose table address that the primary module is checked in the message has been associated with certain registered data turns
On hair device；If having associated, the order is directly issued to the headend, goes to step 4；
If the primary module detects the RS485 electric energy meters to be copied and is not associated with any headend also,
Message will be checked meter by all headends under multicast transmission to platform area；
Step 4, headend by each RS485 electric energy meters of message transmission to its lower mounting, only with the message in
The consistent RS485 electric energy meter energy response messages of purpose table address；The response message is returned to the G3 primary modules of concentrator side；To
The RS485 electric energy meters copied not with any headend set up associate, the G3 primary modules by the RS485 table addresses with have response
Headend address information；Completion is once checked meter and interaction and is exited.
The networking checking of the headend is only relevant with the G3 primary modules, unrelated with the concentrator.It is described enter
Net checking is using the bi-directional verification mechanism based on des encryption algorithm.Road between the headend and the G3 primary modules
By by the headend periodic maintenance, and its to the path of the primary module be dynamically changeable.The purpose table address is
The table address of RS485 meters.
Physical layer of the invention is based on advanced OFDM modulation techniques, is descending to be used with multiple based on RS485 modes
The electric energy meter of RS485 interfaces is communicated, up use meets the equipment that the carrier system of G3 standards is communicated with concentrator.
The carrier signal for having decayed can not only be realized amplifying and transmitted again by the present invention, realize the effect of G3 carrier signal automatic relays, and
And concentrator can be issued to the data forwarding of G3 carrier networks to RS485 networks, will use what RS485 modes communicated indirectly
Electric energy meter is incorporated within the coverage of G3 carrier meter reading systems, is that client has saved investment.
The present invention is not involved in the packet parsing work of application layer completely, transparent transmission is only made to application layer data, therefore hang
The electric energy meter that use RS485 modes under it are communicated can be checked meter agreement using different types of application layer（I.e. can be with
It is that GB645-07, GB645-97 country foreign countries such as agreement, or COSEM/DLMS, IEC1107 that check meter check meter agreement）, only
The communication protocol for wanting electric energy meter to use is identical with the communication protocol of concentrator/main website acquisition software.
The present invention is plug and play in low-voltage collecting meter reading system, completely without miscellaneous equipment（Concentrator or hand-held set）
It is managed with configuration, address of the invention need not be set on concentrator, it is not required that concentrator go safeguard
The present invention and its lower address corresponding relation for mounting table.For concentrator and electric energy meter, the present invention one is transparent
Transmission channel, therefore can significantly simplify in-site installation, subtract reduced-maintenance workload.
As long as the electric energy table address of copy reading is wanted in offer, concentrator/main website just can be with the meter of copy reading to the lower mounting of the present invention
Data.Therefore in having the G3 low pressure carrier wave kilowatt meter reading-out systems of present invention addition, concentrator/main website copy reading RS485 tables are carried with copy reading
The operation of wave table is identical, and RS485 electric energy meters are equal to carrier wave meter in application layer software treatment, is simplified
The operation of main website and concentrator.
Simultaneously but also as the G3 repeaters of plug and play, the same various functions of integration of equipments can not only subtract the present invention
Few cost manufactured, also mitigates the workload of on-site installation and maintenance.
Brief description of the drawings
Fig. 1 is integrated circuit hierarchy chart of the invention.
Fig. 2 is main control MCU circuit diagram of the invention.
Fig. 3 is serial port circuit figure of the invention.
Fig. 4 is RS485 circuit diagrams of the invention.
Fig. 5 is PLC circuit figure of the invention.
Fig. 6 is analog front circuit figure of the invention.
Fig. 7 is line drive circuit figure of the invention.
Fig. 8 is AC power supplies circuit diagram of the invention.
Fig. 9 is D/C power circuit diagram of the invention.
Figure 10 is PCB schematic diagrames of the invention.
Figure 11 is software architecture schematic diagram of the invention.
Figure 12 is one embodiment of the present invention schematic diagram.
Specific embodiment
As shown in figure 1, the present invention includes main control MCU, PLC circuit, RS485 circuits, serial port circuit and power circuit.Master control
MCU is connected by serial ports with PLC circuit；Main control MCU is connected by 485 interfaces with RS485 circuits；Main control MCU by serial ports with
Serial port circuit is connected.Power circuit provides power supply for foregoing circuit, and it includes AC power supplies circuit and D/C power circuit.
As shown in Fig. 2 main control MCU of the invention using NXP companies model LPC1768 based on ARM Cortex-
The microcontroller chip of M3 kernels.
Main control MCU is connected by AD ports with UART0 interfaces, for debugging；It passes through serial ports and is connected with UART3 interfaces,
For the receiving and transmission of infrared data；It passes through I/O ports and is connected with PLC base band SPI port in PLC circuit；It passes through string
Mouth is connected with RS485 circuits.
As shown in figure 3, serial port circuit of the invention includes receiving circuit, transtation mission circuit, three be connected with main control MCU
A core connector P2 and two core connector P3.
Receiving circuit includes operational amplifier U7, operational amplifier U8, triode Q8 and infrared receiving tube DDR1.
5 pin of operational amplifier U7 are connected with 3.3V power supplys；Its 4 pin is connected by 1 pin of resistance R30 and operational amplifier U8
Connect；4 pin is also connected by resistance R28 with 3.3V power supplys；Its 3 pin is grounded by resistance R63；Its 2 pin is grounded, and the pin also leads to
Electric capacity C60 is crossed to be connected with 3.3V power supplys；Its 1 pin is connected by electric capacity C70 with 4 pin of the operational amplifier, 1 pin also with computing
The 4 pin connection of amplifier U8.Resistance R61 is connected between 1 pin of the operational amplifier and 4 pin.
The negative electrode of infrared receiving tube DDR1 is connected with 4 pin of operational amplifier U7, its plus earth.
The base stage of triode Q8 is connected after being connected with colelctor electrode with 1 pin of operational amplifier U7；Its emitter stage and the computing
The 4 pin connection of amplifier.
5 pin of operational amplifier U8 are connected with 3.3V power supplys；Its 3 pin is connected by resistance R60 with 3.3V power supplys, the pin
Also it is connected with 3 pin of operational amplifier U7 by resistance R62, the pin is also grounded by electric capacity C71；Its 2 pin is grounded, the pin
Also it is connected with 3.3V power supplys by electric capacity C62；Its 1 pin is connected with 85 pin of main control MCU.
Transtation mission circuit includes triode Q9 and infrared transmitting tube DDT1.The base stage of triode Q9 passes through resistance R65 series electricals
Resistance R31 is connected with 82 pin of main control MCU, and the base stage is also connected by resistance R64 with 3.3V power supplys；Its emitter stage and 3.3V power supplys
Connection；Its colelctor electrode is connected by resistance R66 with the anode of infrared transmitting tube DDT1.Resistance R67 is connected in parallel with resistance R66.
The minus earth of infrared transmitting tube DDT1.Electric capacity C67 is connected between 3.3V power supplys and ground.
Three core connector P2 are used for the startup and monitoring of UART0 interfaces（Boot/monitor）Signal transmission.The connector
1 pin ground connection；Its 2 pin is connected by resistance R16 with 98 pin of main control MCU, is sent for 5V to 3V logic NXP serial datas,
2 pin is also connected by resistance R5 with 3.3V power supplys；Its 3 pin is connected by resistance R13 with 99 pin of main control MCU, for 5V extremely
3V logic NXP serial datas are received.
Two core connector P3 are used to be connected with main control MCU.
As shown in figure 4, RS485 circuits include RS485 transceivers US2, optocoupler N1, optocoupler N2, optocoupler N3,3 transient state electricity
Pressure suppressor, 1 discharge tube, five core connectors and 2 two core connectors.
RS485 circuits include low level transmitted data circuit and high level received data circuit.
1 pin of RS485 transceivers US2 is connected with 3 pin of optocoupler N1, connects with 3 pin of optocoupler N2 after its 2 pin and the connection of 3 pin
Connect；Its 4 pin is connected with 5 pin of optocoupler N3；Its 5 pin connects digitally；Its 6 pin is connected by resistance RS12 with power supply V_232, the pipe
Pin is also connect digitally by Transient Voltage Suppressor DS2, and the pin is also connected by thermistor TR2 with 485A；Its 7 pin passes through
Resistance RS11 is connect digitally, and the pin is also connect digitally by Transient Voltage Suppressor DS1, the pin by discharge tube PD1 with
The 6 pin connection of the RS485 transceivers, the pin is also connected with 485B；Its 8 pin is connected with power supply V_232.Electric capacity CS1 is connected to electricity
Between source V_232 and ground.
Transient Voltage Suppressor DS3 be connected to power supply V_232 and digitally between.
1 pin of optocoupler N1 is connected by resistance R9 with power supply V_232；Its 4 pin connects simulation ground；Its 5 pin by resistance RS2 with
3.3V power supplys are connected, and the pin is also connected with 74 pin of main control MCU, for the data receiver of RS485 receiving terminals 485 of main control MCU；
Its 6 pin is connected with 3.3V power supplys.
4 pin of optocoupler N2 are connected with power supply V_232；Its 3 pin is connect digitally by resistance RS7；Its 2 pin and main control MCU
56 pin are connected, and signal 485EN is enabled for transmitting RS485；Its 1 pin is connected by resistance RS5 with 3.3V power supplys.
6 pin of optocoupler N3 are connected with power supply V_232；Its 5 pin is connected by resistance RS10 with power supply V_232；Its 4 pin connects number
Word ground；Its 3 pin connects simulation ground by resistance R65；Its 1 pin is connected with the colelctor electrode of triode Q1.The emitter stage of triode Q1 with
3.3V power supplys are connected；Its base stage is connected by resistance RS1 with the emitter stage, and the base stage is also by resistance R31 and the 75 of main control MCU
Pin is connected, for the data is activation of RS485 transmitting terminals 485 of main control MCU.
Electric capacity C41 is connected between 3.3V power supplys and simulation ground；Electric capacity C74 is connected between 3.3V power supplys and simulation ground.Electric capacity
C32 be connected to power supply V_232 and digitally between；Electric capacity C68 be connected to power supply V_232 and digitally between；Electric capacity C75 is connected to power supply
V_232 and digitally between.
1 pin of five core connector J4 connects with 3.3V power supplys；Its 2 pin is connected with simulation；Its 3 pin receives data with RS485
Pin 485RX is connected；Its 4 pin is connected with RS485 enable pins 485EN；Its 5 pin sends data pins 485TX and connects with RS485
Connect.
1 pin of two core connector P4 is connected with power supply V_232, its 2 pin be digitally connected.
As shown in figure 5, PLC circuit includes PLC modem circuits, analog front circuit and line drive circuit.PLC
Modem circuit is connected by analog front circuit with line drive circuit, and line drive circuit is connected with power line.
PLC modem circuits include that G3 modems U3 and PLC start FLASH.
21 pin of G3 modems U3 are connected with 64 pin of main control MCU, for receiving data-signal P2_9_RXD2；Its
22 pin are connected with 65 pin of main control MCU, for sending data-signal P2_8_TXD2；Its 43 pin is connected with 78 pin of main control MCU,
For transmitting clock signal P0_7_SCK1；Its 42 pin is connected with 76 pin of main control MCU, and going out slave for transmitting main frame enters signal
P0_9_MOSI1；Its 40 pin is connected with 77 pin of main control MCU, and entering slave for transmitting main frame goes out signal P0_8_MISO1；It 37
Pin is connected with 79 pin of main control MCU, for transmitting slave selection signal P0_6_SSEL1；Its 31 pin connects with 49 pin of main control MCU
Connect, for transmitting PLC program signal PLC_PROG；Its 14 pin is connected with 27 pin of main control MCU, for transmitting PLC reset signals
P3_25_PLC_RST；Its 62 pin is connected with 92 pin of main control MCU, for transmitting AFE(analog front end) reset signal AFE_RST；It 43
Pin is connected with 78 pin of main control MCU, for transmitting clock signal P0_7_SCK1.
5 pin that PLC starts FLASH are connected with 60 pin of main control MCU, and going out slave for transmitting main frame enters signal P0_18_
MOSI0；Its 2 pin is connected with 61 pin of main control MCU, and entering slave for transmitting main frame goes out signal P0_17_MISO0；Its 1 pin passes through
Resistance R4 series resistances R3 is connected with 63 pin of main control MCU, and for transmitting slave selection signal P0_16_SSEL0,1 pin also leads to
Resistance R4 is crossed to be connected with 29 pin of G3 modems U3；Its 6 pin is connected with 62 pin of main control MCU, for transmitting clock signal
P0_15_SCK0；Its 1 pin, 2 pin, 6 pin are also connected by exclusion PRAK with 3.3V power supplys respectively；Its 4 pin connects simulation ground；Its 3 pin
It is connected with 3.3V power supplys by exclusion PRAK with 7 pin and after connecing；Its 8 pin is connected with 3.3V power supplys.Electric capacity C8 is connected to 3.3V power supplys
Between simulation ground.
G3 modems U3 is modulated using the power line communication based on OFDM of the model MAX2992 of MAXIM companies
Demodulator.
As shown in fig. 6, analog front circuit of the invention includes analog front-end chip U5.
47 pin of analog front-end chip U5 are connected with 62 pin of G3 modems U3, believe for transmitting AFE(analog front end) and resetting
Number AFE_RST；Its 17 pin is connected with 1 pin of modem U3, for transmitting AFE(analog front end) SPI chip selection signals AFE_SPI_
CS；Its 18 pin is connected with 3 pin of modem U3, and entering slave for transmitting AFE(analog front end) SPI main frames goes out signal AFE_
SPI_MISO；Its 16 pin is connected with 2 pin of modem U3, and going out slave for transmitting AFE(analog front end) SPI main frames enters signal
AFE_SPI_MOSI；Its 15 pin is connected with 4 pin of modem U3, for transmitting AFE(analog front end) SPI clock signals AFE_
SPI_SCK；Its 14 pin is connected with 41 pin of modem U3, for transmitting AFE(analog front end) AGC freeze signals AFE_AGC_
FRZ；Its 25 pin is connected with 51 pin of modem U3, and data conversion signal AFE_ is sent for transmitting AFE(analog front end)
TXCONV；Its 26 pin is connected with 61 pin of modem U3, and data conversion signal AFE_ is received for transmitting AFE(analog front end)
RXCONV；Its 27 pin is connected with 52 pin of modem U3, and data-signal AFE_ is sent for transmitting AFE(analog front end)
TXDATA；Its 28 pin is connected with 60 pin of modem U3, and data-signal AFE_ is received for transmitting AFE(analog front end)
RXDATA；Its 29 pin is connected with 55 pin of modem U3, and data clock signal AFE_ is sent for transmitting AFE(analog front end)
TXCLK；Its 30 pin is connected with 57 pin of modem U3, and data clock signal AFE_ is received for transmitting AFE(analog front end)
RXCLK；Its 32 pin is connected with 63 pin of modem U3, and data enable signal AFE_ is received for transmitting AFE(analog front end)
RXEN；Its 33 pin is connected with 64 pin of modem U3, and data enable signal AFE_ is sent for transmitting AFE(analog front end)
TXEN。
Analog front-end chip U5 of the invention uses the mould based on ofdm signal of the model MAX2991 of MAXIM companies
Intend front-end chip.
As shown in fig. 7, line drive circuit of the invention includes that high current VCOM drives operational amplifier U9, two groups of power
Amplifying circuit, AFE(analog front end) send data and enable control circuit, carrier wave termination power.High current VCOM drives operational amplifier U9
It is connected with carrier wave termination power by power amplification circuit respectively；Carrier wave termination power is connected with power line.
High current VCOM drives 2 pin of operational amplifier U9 to be connected with 10 pin of analog front-end chip U5 by resistance R45,
Data output positive signal AFE_TX_OUT_P is sent for transmitting AFE(analog front end)；Its 3 pin and 5 pin are simultaneously existed after connecing by resistance R43
Series resistance R37 is connected with 12V power supplys, this two pin and after connecing also by being grounded after resistance R43 series resistances R38；Its 6 pin leads to
Cross resistance R42 to be connected with 9 pin of analog front-end chip U5, data output negative signal AFE_TX_ is sent for transmitting AFE(analog front end)
OUT_N；Its 4 pin and 9 pin are grounded；Its 7 pin transmits output signal OUT_B, the pin and triode Q2 in power amplification circuit
Base stage is connected；Its 1 pin transmits output signal OUT_A, and the pin is connected with the base stage of triode Q6 in power amplification circuit；It 8
Pin is connected with 12V power supplys.Electric capacity C59 is connected between 12V power supplys and ground.Electric capacity C63 is connected to the two ends of resistance R38.
Power amplification circuit one includes triode Q6 and triode Q7.The colelctor electrode of triode Q7 is connected with 12V power supplys；Its
Base stage is connected with the base stage of triode Q6；Its emitter stage is connected with the emitter stage of triode Q6, and the emitter stage is also with metal-oxide-semiconductor Q5's
Drain electrode connection.Resistance R46 is connected between the base stage of triode Q7 and emitter stage.Electric capacity C64 is in parallel with electric capacity C65 to be followed by 12V
Between power supply and ground.The grounded collector of triode Q6.
Triode Q7 is NPN pipes, and triode Q6 is PNP pipe.
Power amplification circuit two includes triode Q1 and triode Q2.The colelctor electrode of triode Q1 is connected with 12V power supplys；Its
Base stage is connected with the base stage of triode Q2；Its emitter stage is connected with the emitter stage of triode Q6, and the emitter stage is also with metal-oxide-semiconductor Q3's
Drain electrode connection.Resistance R39 is connected between the base stage of triode Q1 and emitter stage.Electric capacity C56 is in parallel with electric capacity C57 to be followed by 12V
Between power supply and ground.The grounded collector of triode Q2.
Triode Q1 is NPN pipes, and triode Q2 is PNP pipe.
AFE(analog front end) sends data enable control circuit includes metal-oxide-semiconductor Q3, metal-oxide-semiconductor Q4 and metal-oxide-semiconductor Q5.The grid of metal-oxide-semiconductor Q4
Pole is connected by resistance R47 with 33 pin of analog front-end chip U5, and data enable signal AFE_TXEN is sent for transmitting；Its leakage
Pole is connected by resistance R40 with 12V power supplys, and grid of the source electrode also with metal-oxide-semiconductor Q5 is connected；Its source ground.
The grid of metal-oxide-semiconductor Q5 is connected by resistance R48 series resistances R45 with 10 pin of analog front-end chip U5, for passing
Pass AFE(analog front end) and send data output positive signal AFE_TX_OUT_P；Its grid is connected with the grid of triode Q3；Its source electrode with
The anode connection of voltage-stabiliser tube D7.The negative electrode of voltage-stabiliser tube D7 is connected with 12V power supplys.The plus earth of voltage-stabiliser tube D8, its negative electrode with
The anode connection of voltage-stabiliser tube D7.
The grid of metal-oxide-semiconductor Q3 is connected by resistance R41 series resistances R42 with 9 pin of analog front-end chip U5, for transmitting
AFE(analog front end) sends data output negative signal AFE_TX_OUT_N；Its source electrode is connected with the anode of voltage-stabiliser tube D4.Voltage-stabiliser tube D4
Negative electrode be connected with 12V power supplys.The plus earth of voltage-stabiliser tube D2, its negative electrode is connected with the anode of voltage-stabiliser tube D4.
Bi-directional voltage stabilizing diode Z1 is connected between the source electrode of the source electrode of metal-oxide-semiconductor Q5 and metal-oxide-semiconductor Q3.
Carrier wave termination power includes coupling transformer and electric power wire connections J2.6 pin and AFE(analog front end) of coupling transformer
The 3 pin connection of chip U5, data input positive signal AFE_RX_IN+ is received for transmitting AFE(analog front end)；Its 7 pin passes through electric capacity C61
It is connected with its 9 pin；Its 10 pin is connected with 4 pin of analog front-end chip U5, and the negative letter of data input is received for transmitting AFE(analog front end)
Number AFE_RX_IN-；Its 5 pin is connected with 1 pin of electric power wire connections J2；Its 4 pin is connected by electric capacity C58 with its 2 pin, electric capacity
C69 is connected in parallel with electric capacity C58；Its 1 pin is connected with 2 pin of electric power wire connections J2.
Power circuit of the invention includes AC power supplies circuit and D/C power circuit.
As shown in figure 8, AC power supplies circuit include power line connecting interface J2, rectification circuit, filter circuit, reduction voltage circuit,
Protection circuit, mu balanced circuit and converter circuit.
On the one hand AC power supplies circuit is carrying out handing over straight on the one hand for termination power of the invention provides power line input signal
Circulate after changing as each power supply unit provides power supply.
As shown in figure 9, D/C power circuit includes 3.3V power circuits, 5V power circuits and 15V power circuits.
As shown in Figure 10, in specific making, the present invention includes power panel, mainboard, 485 plates and termination power.220V
Exchange is electrically accessed power panel, also in access termination power；Power panel provides+15V power supplys and+3.3V power supplys for mainboard；The power supply
Plate provides+5V power supplys for 485 plates.RS-485 buses access 485 plates, and 485 plates are connected by UART interface with mainboard again.
As shown in figure 11, software architecture of the invention includes main control MCU software architecture and G3 modulation and demodulation software frameworks.
The present invention is communicated by RS485 interfaces with the application layer of 485 electric energy meters；And main control MCU of the invention passes through UART and G3
Modem communication.
Main control MCU software architecture includes 485 with infrared external communication interface module, G3 headends parameter setting and liter
Level module and G3 modem modules.
Data Transport Protocol of the invention is broadly divided into physical layer and MAC layer two-layer.
Bottom is physical layer, the main channel coding for completing data, the configuration of various modulation /demodulation patterns, subchannel point
It is the guarantee of traffic rate and reliability with operations such as, synchronization, channel estimation, channel decodings.Physical layer of the invention is using first
The OFDM modulation techniques entered, Neusoft's carrier wave, dawn Cheng Zaibo relative to traditional physical layer using spread spectrum are speed, anti-dry
Disturb, networking capability is all improved.
Second layer MAC layer is made up of two sublayer IEEE802.15.4-2006 with being adapted to 6LoWPAN layers.
IEEE802.15.4-2006 protocol sublayers mainly complete media interviews Access Control operation.
6LoWPAN sublayers complete transport layer and Network layer function, mainly realize route querying, and communication network is set up and number
According to forwarding capability.When it is this device address to be adapted to the 6LoWPAN layers of destination address for judging to connect several packets, the present invention will be applied
Layer data is sent to RS485 electric power meter ends by RS485 interfaces；The destination address of transmission data is judged when 6LoWPAN layers not
When being this device address, the present invention directly forwards network layer data to power line as repeater.
The present invention is plug and play, and active scan network is started after upper electricity；Then to the G3 primary modules of concentrator side
（As existed）The application that networks is initiated, by the way that after the checking that networks, the present invention is registered on the G3 primary modules of concentrator side, as G3 electricity
A node in line of force carrier network, will serve as the role of G3-G3, G3-RS485 data forwarding person.
Networking authentication mechanism of the invention is only relevant with the G3 primary modules of concentrator side, and unrelated with concentrator.The present invention
After networking, you can normal work, it is not necessary to which any equipment is configured or managed to it；Its networking authentication mechanism is used and is based on
The bi-directional verification mechanism of des encryption algorithm.It is achieved in MANET of the invention and self-configuring.
After the present invention is as a node in G3 networks, itself and the route between the G3 primary modules of concentrator side will be by
Oneself periodic maintenance of the invention, and the present invention to the path of the primary module be dynamically changeable, foundation link communication matter at that time
Amount, dynamic adjustment is made according to the algorithm of standard, is not required to concentrator interference, the ability with network self-healing.
As shown in figure 12, G3-PLC communication systems create G3-PLC networks, master and slave module and the present invention by G3 primary modules
Network is safeguarded jointly, it is ensured that the robustness of network.The present invention can simultaneously in G3 networks and G3 networks or G3 networks and RS485 networks
Between carry out data transparent transmission, so as to expand G3-PLC network coverages.The present invention can also be entered by the infrared mouth for carrying
Line parameter is set and local program upgrading.What thick lines were represented in the figure is power line；Hachure（Concentrator primary module is with off line
In network）What is represented is 485 connections.The figure has carried out the location of in Automatic meter reading system schematically illustrate to the present invention.
In the G3-PLC networks, main website/concentrator wants the RS485 electric energy meters of the lower mounting of the copy reading present invention, its specific step
It is rapid as follows：
Step 1, active scan network after electricity on headend；Then registration is initiated to the G3 primary modules of concentrator side,
By the way that after the checking that networks, the headend is registered on the G3 primary modules of the concentrator side, as G3 power line carrier networks
In a node；
Step 2, main website sends message to the G3 primary modules of concentrator side of checking meter；
Step 3, whether the purpose table address that the primary module is checked in the message has been associated with certain registered data turns
On hair device；If having associated, the order is directly issued to the headend, goes to step 5；
If the primary module detects the RS485 electric energy meters to be copied and is not associated with any headend also,
Message will be checked meter by all headends under multicast transmission to platform area（Except carrier wave meter）, then each data forwarding
Each RS485 electric energy meters that device mounts down message transmission to it；RS485 electricity only consistent with the purpose table address in the message
Can table response；
Step 4, after the response message is returned to the G3 primary modules of concentrator side, the G3 primary modules of concentrator side are by RS485
Table address and the headend address information for having response；Completion is once checked meter and interaction and is exited；
During next copy reading RS485 electric energy meters again, the number associated with the RS485 electric energy meters is just directly forwarded the packet to
According on transponder, it is no longer necessary to look for meter by multicast mode, Internet resources are saved.
The order is transparent to step 5, the headend RS485 networks of lower extension again, with purpose table in RS485 networks
Identical RS485 electric energy meter in address replys response message, thus completes once to check meter and interaction and exits.
PLC network data are transformed into RS485 network datas by the present invention, and the packet parsing work of application layer is not involved in completely
Make, transparent transmission only is made to application layer data, so be unrelated with application layer, be capable of achieving G3 network-G3 networks, G3 networks-
The transparent transmission of RS485 network datas.Therefore the present invention below accessible any type, use any agreement with RS485 side
The electric energy meter that formula is communicated, as long as the communication protocol of the communication protocol of electric energy meter use and concentrator/main website acquisition software
It is identical.The present invention is only a data communications equipment for meeting G3 standards, unrelated with any application layer protocol, with general
Property.
In G3 low-voltage collecting meter reading systems, address of the invention need not be set on concentrator, it is not required that concentrate
Device goes to safeguard the present invention and mounts the address corresponding relation of meter below.
Additionally, main website/concentrator will copy the data of the RS485 electric energy meters that headend is mounted below, as long as provide will
It is sufficient that address of the RS485 electric energy meters of copy reading, it is not necessary to which the ground of the headend that the electric energy meter is connected to is provided again
Location.Because main website/concentrator is equal to carrier wave meter to RS485 tables in application layer software treatment, therefore there is the present invention
In the G3 low-voltage collecting meter reading systems of addition, the operation of its copy reading RS485 electric energy meters is to be not different with the operation of its copy reading carrier wave meter
's.
Claims (5)
1. a kind of meter register method of G3 headends, it is characterised in that the method comprises the following steps：
Step 1, active scan network after electricity on headend；Then registration is initiated to the G3-PLC primary modules of concentrator side,
By the way that after the checking that networks, the headend is registered on the G3-PLC primary modules of the concentrator side, as G3-PLC power lines
A node in carrier network；
Step 2, main website sends message to the G3-PLC primary modules of concentrator side of checking meter；
Whether step 3, the purpose table address that the primary module is checked in the message has been associated with certain registered headend
On；If having associated, the message is directly issued to the headend, goes to step 4；
If the primary module detects the RS485 electric energy meters to be copied and do not associated with any headend also, will copy
Statistical tables and reports text is by all headends under multicast transmission to platform area；
Step 4, headend by each RS485 electric energy meters of message transmission to its lower mounting, only with the message in purpose
The consistent RS485 electric energy meter energy response messages of table address；The response message is returned to the G3-PLC primary modules of concentrator side；To
The RS485 electric energy meters copied not with any headend set up associate, the G3-PLC primary modules by the RS485 table addresses with have
The headend address information of response；Completion is once checked meter and interaction and is exited.
2. the meter register method of G3 headends according to claim 1, it is characterised in that the headend enters
Net checking is only relevant with the G3-PLC primary modules, unrelated with the concentrator.
3. the meter register method of G3 headends according to claim 2, it is characterised in that the networking checking uses base
In the bi-directional verification mechanism of des encryption algorithm.
4. the meter register method of G3 headends according to claim 1, it is characterised in that the headend and institute
The route between G3-PLC primary modules is stated by the headend periodic maintenance, and its to the path of the primary module be dynamically changeable
's.
5. the meter register method of G3 headends according to claim 1, it is characterised in that the purpose table address is
The table address of RS485 meters.
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| CN105185088B (en) * | 2015-10-13 | 2019-02-19 | 威胜集团有限公司 | The wireless rapid meter reading method of measuring instrument |
| CN107430805B (en) * | 2015-12-29 | 2021-06-15 | 华为技术有限公司 | Information transmission system, method and device |
| CN105490707A (en) * | 2016-01-11 | 2016-04-13 | 国家电网公司 | OFDM-based high-speed narrowband carrier communication device |
| CN105578692A (en) * | 2016-02-25 | 2016-05-11 | 南京思飞捷软件科技有限公司 | Light regulation method for transmitting PWM signal to control LED through power line carrier technology |
| CN109167615B (en) * | 2018-08-16 | 2021-08-10 | 江苏林洋能源股份有限公司 | Uplink and downlink time-sharing communication method based on G3-PLC communication network |
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