CN202736263U - Collector device of wireless ad hoc network meter reading system - Google Patents
Collector device of wireless ad hoc network meter reading system Download PDFInfo
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- CN202736263U CN202736263U CN2012201609899U CN201220160989U CN202736263U CN 202736263 U CN202736263 U CN 202736263U CN 2012201609899 U CN2012201609899 U CN 2012201609899U CN 201220160989 U CN201220160989 U CN 201220160989U CN 202736263 U CN202736263 U CN 202736263U
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Abstract
Disclosed is a collector device of a wireless ad hoc network meter reading system. The collector device of the wireless ad hoc network meter reading system comprises a processor unit, a 485 bus interface unit, a wireless transceiver unit and a power management unit, wherein the processor unit is in charge of operation and control of a whole device, the 485 bus interface unit is used for connecting one electricity meter or a plurality of electricity meters, the wireless transceiver unit is in charge of exchanging data and commands of a collector of the wireless ad hoc network meter reading system, and the power management unit supplies the whole device with a power supply. An operation method of the collector device is as follows: the commands are received by the wireless transceiver unit and then are sent to the processor unit for processing, the processor unit sends request frames to the electricity meters, the processor unit receives response frames from the electricity meters and analyzes the response frames to obtain electricity consumption information, and finally the electricity consumption information is returned to the collector through the wireless transceiver unit. The collector device of the wireless ad hoc network meter reading system resolves the problems that the existing micropower wireless communication meter reading manner is excessive in channel disturbance, low in security, short in communication distance and bad in penetrability. The collector device of the wireless ad hoc network meter reading system is low in cost, high in cost performance, good in timeliness, safe and reliable, and convenient to use and install.
Description
Technical field
The utility model is applicable to the micropower wireless self-networking and checks meter, and relates to communication technical field and power technology field, relates in particular to a kind of wireless self-networking kilowatt meter reading-out system collector device.
Background technology
Intelligent copy reading and control tool to ammeter, water meter, gas meter, flow meter and heating power table are of great significance.At present, domestic meter reading method mainly contains artificial, infrared, radio-frequency (RF) identification, 485 buses, power line carrier, mobile communication technology (CDMA, GPRS, 3G, LTE etc.), Ethernet and micropower wireless self-networking and checks meter etc.Wherein, the manual metering human cost is high, the copy reading error is large, is eliminated gradually; Infrared copy meter and radio-frequency (RF) identification are checked meter still needs special messenger or special train from house to house or the one by one copy reading of residential quarter, and efficient has much room for improvement; 485 bus meter reading methods need wiring, and can only implement among a small circle; The mobile communication meter reading method is because the cost of baseband chip and mobile service is higher, and the table class set that only is suitable for the large user is at present copied, or as the uplink communication mode of concentrator; Therefore the Ethernet meter reading method only is suitable for the uplink communication mode of concentrator because the distribution of its access point is extensive not; Also there are many technical barriers in the power line carrier meter reading method at present owing to limited by the objective condition of present domestic electrical network; Micropower wireless self-networking mode has on a large scale, low cost, low-power consumption, self-organization, the advantage such as data-centered, and the table class set that is very suitable in the electrical networks such as residential quarter, large buildings and industrial park " last kilometer " scope is copied.
Micropower wireless self-networking meter reading method is used for reference the thought of wireless sensor network, for together one or many ammeters on the space distribute collectors (node), be responsible for to gather the various power informations such as flat, point, peak, paddy and total energy value of ammeter, ammeter is implemented to configure and the various controls such as freezed.Simultaneously, distribute one or more concentrators (aggregation node or base station) for each residential quarter, large buildings and industrial park etc., be used for converging whole linchpin and belong to the data that collector collects in the scope, and by collector ammeter is controlled.In addition, consider the restriction of communication distance, between concentrator and collector, need some repeaters (via node), realize that the bi-directional data between concentrator and the collector is transmitted.The representative instance of micropower wireless self-networking meter reading method is ZigBee and the proprietary protocol that works in 433Mhz.
There is following problem at least in prior art:
Industrial science medical treatment (ISM) frequency range that ZigBee and proprietary protocol are worked has been concentrated the communications such as bluetooth, Wi-Fi, WLAN, and channel disturbance is many, and security is lower.The ZigBee communication distance that is operated in 2.4Ghz is short, and penetration capacity is not enough, and adaptive faculty is relatively poor under residential quarter, building and the industrial environment of complexity.
To address the above problem as starting point, systematically study and designed a kind of wireless self-networking kilowatt meter reading-out system collector device and operation method just.In present domestic and international association area research report and retrieval, have no and the same or similar design of this patent.
Summary of the invention
Technical matters:
The purpose of this utility model provides and is applied to a kind of wireless self-networking kilowatt meter reading-out system collector device and the operation method that the micropower wireless self-networking is checked meter, solve the problem that existing method channel disturbance is many, security is lower, communication distance is short and penetration capacity is weak, and require that its cost of investment is low, cost performance is high, real-time is good, safe and reliable, operation and maintenance makes things convenient for.
Technical scheme:
A kind of wireless self-networking kilowatt meter reading-out system collector device, comprise the computing of being responsible for whole device be connected with control processor unit, be used for connecting one or many ammeters Bus Interface Unit, be responsible for and the wireless transmit/receive units of wireless self-networking kilowatt meter reading-out system concentrator interaction data and order and the Power Management Unit that power supply is provided for whole device; The serial bus interface unit is connected with described processor unit with the GPIO mouth by the UART mouth; Wireless transmit/receive units is connected with described processor unit;
Described processor unit comprises processor, debugging interface, crystal oscillating circuit, expansion concentrator marker and extended memory; Described processor and debugging interface, expansion concentrator marker and extended memory carry out exchanges data; Crystal oscillating circuit is connected with the crystal oscillating circuit interface of processor;
Described debugging interface comprises jtag interface and serial ports, and jtag interface is used for the programming of program, and serial ports is used for the output of Debugging message; Described expansion concentrator marker is used for the unique address of this collector of sign device; Described extended memory is stored the energy information that collects;
Processor unit, serial bus interface unit and Power Management Unit are positioned on the pcb board, and this pcb board is motherboard; Wireless transmit/receive units is positioned on the pcb board, and this pcb board is the wireless receiving and dispatching daughter board; It is to adopt standard interface to connect that described motherboard is connected with hardware between the wireless receiving and dispatching daughter board.
Described serial bus interface unit is 485 Bus Interface Units; Described 485 Bus Interface Units comprise isolated location and RS485-TTL level conversion unit; Described isolated location is that photoelectrical coupler consists of; Described RS485-TTL level conversion unit is 485 driving transceiving chips; 485 drive between transceiving chips and the described processor unit and are connected photoelectrical coupler;
Described 485 Bus Interface Units are connected with universal input/output interface GPIO with the universal asynchronous serial interface UART of processor.
Described wireless transmit/receive units comprises connector, radio frequency chip, balance match circuit and antenna; Connect the balance match circuit between radio frequency chip and the antenna; Wired I/O port of radio frequency chip connects the synchronous serial peripheral interface SPI of processor by connector;
Described connector is used for connecting motherboard and wireless receiving and dispatching daughter board, and provides fixed support and power supply for the wireless receiving and dispatching daughter board;
Described radio frequency chip provides modulation /demodulation, data to process and the data buffer storage function;
Described balance match circuit is finished balanced-unbalanced conversion, impedance matching and signal filtering;
Described Power Management Unit comprises the buffer circuit of DC-DC change-over circuit, DC input/DC output;
The DC-DC change-over circuit is the DC high voltage of input conversion output DC low-voltage; The buffer circuit of DC input/DC output is isolated the DC high voltage of input and output DC high voltage.
The operation method of above-mentioned wireless self-networking kilowatt meter reading-out system collector may further comprise the steps:
(1) after collector powered on, at first completion system initialization of processor unit comprised: the initialization of SPI interface initialization, the initialization of UART mouth, GPIO mouth and the initialization of the radio frequency chip in the radio receiving transmitting module; Wherein the initialization of radio frequency chip comprises electrification reset, register configuration and power amplifier configuration;
(2) when being that processor unit is in idle pulley, then carry out subsequent step;
(3) processor unit is from wireless transmit/receive units receive data bag:
(3-1) wireless transmit/receive units triggers interruption by the level saltus step after wireless listening detection is received packet;
(3-2) the set packet receives sign in interrupt handling routine, and then triggers the receive data by wireless task;
If (3-3) data packet length surpasses preseting length, abandon this packet, empty data receiver FIFO buffer RXFIFO, return step (2); If data packet length is no more than preseting length, then enter step (3-4);
(3-4) packet that receives is stored in the wireless receiving buffer zone that processor unit distributes;
(4) processor unit is resolved the packet in the wireless receiving buffer zone: if existence then enters step (5) to the operational order of intelligent electric meter; If there is no to the operational order of intelligent electric meter, then empty the wireless receiving buffer zone, return step (2).
(5) the ammeter operational order type that parses according to step (4), processor unit is according to request or the command frame of DL/T645-2007 " multifunctional electric energy meter communication protocol " structure encapsulation respective type.
(6) processor unit sends order or claim frame to ammeter:
(6-1) wait for that ammeter returns response frame, if receive at the appointed time response frame, then enter step (7); Otherwise enter step (6-2);
(6-2) judge that whether the number of times that sends same Frame surpasses three times, identifies this operation failure if surpass three times, and returns step (2); Otherwise, return step (6), resend order or claim frame;
(7) after processor order unit receives response frame, response frame is extracted, resolves, judges and calculate according to DL/T 645-2007 " multifunctional electric energy meter communication protocol ", and deposit the power information that obtains in the wireless transmission buffer zone;
(8) processor unit is stored in data communication device in the wireless transmission buffer zone with step (7) and crosses wireless transmit/receive units and send to concentrator:
(8-1) processor unit sends the order that sends data to wireless transmit/receive units;
(8-2) processor unit sends FIFO buffer TXFIFO with the data that the data in the wireless transmission buffer zone write wireless transmit/receive units
(8-3) whether processor unit is judged that wireless transmit/receive units sends and is finished, if not then return step (8-3) and continue to wait for; Finish if finish then identify whole task, return step (2).
Specifically:
Wireless self-networking kilowatt meter reading-out system collector device described in the utility model is made of motherboard and wireless receiving and dispatching daughter board; Described motherboard is made of processor unit, 485 Bus Interface Units and Power Management Unit; Described wireless receiving and dispatching daughter board is made of wireless transmit/receive units; Adopt standard interface to be connected between described motherboard and the wireless receiving and dispatching daughter board; Processor unit is responsible for computing and the control of whole device; 485 Bus Interface Units are used for connecting one or many ammeters, and are connected with described processor unit with the GPIO mouth by the UART mouth; Wireless transmit/receive units is responsible for and wireless self-networking kilowatt meter reading-out system concentrator interaction data and order; Power Management Unit provides power supply for whole device.
Processor unit comprises core processor, debugging interface, crystal oscillating circuit, expansion concentrator marker and extended memory etc.; Described core processor is selected AVR series or MSP430 series low-power consumption microprocessor, is control and the computing center of whole system, is responsible for the realization of the processing of whole device data, communication protocol and control algolithm; Described debugging interface comprises jtag interface and serial ports, and jtag interface is responsible for the inside Flash recording program to processor, and the state of measurement processor, and serial ports is responsible for the output of Debugging message; Described crystal oscillating circuit provides clock source for system; 48 unique random addresss in the whole world of described expansion concentrator marker for the uniqueness of sign collector device, also can be used as the MAC Address of radio communication; Described extended memory is stored the power information data that the collector device collects as non-volatile memory medium.
Described 485 Bus Interface Units comprise isolated location and RS485-TTL level conversion unit; Isolated location is made of photoelectrical coupler U3 (comprising U3A, U3B, U3C), realizes the electrical isolation between processor unit and intelligent electric meter interface; The RS485-TTL level conversion unit drives transceiving chip U4 by 485 and consists of, finish difference form the RS485 level and+mutual conversion between the 3.3V Transistor-Transistor Logic level; Be connected with universal input/output interface GPIO by universal asynchronous serial interface UART between described 485 Bus Interface Units and the processor unit.
Described wireless transmit/receive units is comprised of connector, radio frequency chip, balance match circuit and antenna; Described connector is used for connecting motherboard and wireless receiving and dispatching daughter board, for the wireless receiving and dispatching daughter board provides fixed support and power supply; Described radio frequency chip adopts CC1100E, and it works in 470Mhz-510Mhz, and data rate can reach 500Kbps, and channel disturbance is few, possesses good penetration capacity, and the functions such as modulation /demodulation, data processing and data buffer storage are provided; Described balance match circuit is finished the functions such as balanced-unbalanced conversion, impedance matching and signal filtering, and circuit is comprised of accurate electric capacity and accurate inductance; Described antenna is that the core work frequency is the columnar antenna of 480Mhz, and length is 17cm; Meeting SPI by the synchronous serial periphery between wireless transmit/receive units and the processor unit is connected.
Described Power Management Unit is made of U1 and U2; U1 finishes+and 5V turns+3.3V; U2 finishes+the 5V input and+DC-DC isolation between the 5V output voltage; The processor unit operating voltage is+3.3VDC; 485 Bus Interface Unit operating voltage are+5VDC; Wireless receiving and dispatching daughter board operating voltage is+3.3VDC to come from motherboard and process filtering processing.
The operation method of wireless self-networking kilowatt meter reading-out system collector may further comprise the steps:
(1) after collector powered on, at first completion system initialization of processor unit comprised: the initialization of SPI interface initialization, the initialization of UART mouth, GPIO mouth, the initialization of LED and the initialization of CC1100E etc.Wherein the initialization of CC1100E mainly comprises electrification reset, register configuration and power amplifier configuration etc.
(2) processor unit is in idle pulley.
(3) processor unit is from wireless transmit/receive units receive data bag:
(3-1) wireless transmit/receive units triggers interruption by the level saltus step after wireless listening detection is received packet;
(3-2) the set packet receives sign in interrupt handling routine, and then triggers the receive data by wireless task;
If (3-3) data packet length is long, abandon this packet, empty data receiver FIFO buffer RXFIFO, return step (2); Otherwise enter step (3-4);
(3-4) packet that receives is stored in the wireless receiving buffer zone that processor unit distributes.
(4) processor unit is resolved the packet in the wireless receiving buffer zone: if existence then enters step (5) to the operational order of intelligent electric meter; Otherwise empty the wireless receiving buffer zone, return step (2).
(5) the ammeter operational order type that parses according to step (4), processor unit is according to dissimilar request or the command frame of DL/T645-2007 " multifunctional electric energy meter communication protocol " structure encapsulation.
(6) processor unit sends order or claim frame to ammeter:
(6-1) wait for that ammeter returns response frame, if receive at the appointed time response frame, then enter step (7); Otherwise enter step (6-2);
(6-2) judge that whether the number of times that sends same Frame surpasses three times, identifies this operation failure if surpass three times, and returns step (2); Otherwise, return step (6), resend order or claim frame.
(7) after processor order unit receives response frame, response frame is extracted, resolves, judges and calculate according to DL/T 645-2007 " multifunctional electric energy meter communication protocol ", and deposit the power information that obtains in the wireless transmission buffer zone.
(8) processor unit is stored in data communication device in the wireless transmission buffer zone with step (7) and crosses wireless transmit/receive units and send to concentrator:
(8-1) processor unit sends the order that sends data to wireless transmit/receive units;
(8-2) processor unit sends FIFO buffer TXFIFO with the data that the data in the wireless transmission buffer zone write wireless transmit/receive units;
(8-3) whether processor unit is judged that wireless transmit/receive units sends and is finished, if not then return step (8-3) and continue to wait for; Finish if finish then identify whole task, empty the wireless transmission buffer zone, return step (2).
Beneficial effect:
The utility model compared with prior art, its beneficial effect is:
1) micropower wireless self-networking kilowatt meter reading-out system collector device and the operation method of the utility model design and development, efficiently solve the problem that channel disturbance is many, security is lower, communication distance is short and penetration capacity is poor in the existing micropower wireless self-networking meter register method, and its cost of investment is low, cost performance is high, real-time is good, safe and reliable, operation and maintenance convenient.
2) wireless self-networking kilowatt meter reading-out system collector device of the present utility model is divided into motherboard and wireless receiving and dispatching daughter board, motherboard gathers power information by 485 Bus Interface Units control intelligent electric meter and from intelligent electric meter, and motherboard is also by wireless receiving and dispatching daughter board and wireless self-networking system concentrator interaction data and order simultaneously.The method for designing that wireless self-networking kilowatt meter reading-out system collector device of the present utility model adopts motherboard and wireless receiving and dispatching daughter board to separate has improved the modularization, extensibility, anti-interference of whole collector device, easily installation property and ease for maintenance greatly.
3) wireless receiving and dispatching daughter board of the present utility model adopts radio frequency chip CC1100E, works in 470Mhz-510Mhz, and channel disturbance is few, and penetration capacity is strong.Be 480Mhz in carrier frequency, emissive power is 10dbm, and data rate is in the situation of 1.2kbps, and communication distance through walls can reach 50m, satisfies micropower wireless self-networking under the complex environments such as residential quarter, building and the industry spot demand of checking meter.
4) the utility model is in Power Management Unit, and power management chip U1 general+5V direct-current input power supplying is converted to+output of 3.3V direct supply, is processor unit and the power supply of wireless receiving and dispatching daughter board of collector device motherboard; Power management chip U2 finishes+the 5V input and+DC-DC isolation between the 5V out-put supply, be the power supplies of 485 Bus Interface Units on the motherboard.Provide multiple direct supply voltage with a power supply unit, to satisfy application requirements.
5) the utility model in design owing to having adopted practicable design, when fully taking into account it and installing in actual applications applicability, reduce its cost as far as possible, notice its fastness, weld before the deployment, and note the sealing of pad so that its device can both work in the environment such as humidity, dust, and can corrosion, the phenomenons such as line short or leak current fault.
6) the utility model can work its device because the operating temperature range of each components and parts that adopts is large in-40 ℃ to+85 ℃ scopes, can make like this utility model be applicable in the world overwhelming majority of countries and area.
7) the utility model is owing to having top 5), 6) described in characteristics, can resist the high humidity of common intensity, high low temperature, dust storm, bump and corrosion etc., greatly strengthened the adaptive faculty of its device under rugged surroundings.
8) the utility model separates its device and AC-DC conversion power supply plate on designing and producing, and guarantee enough physical distances, and the radio frequency unit on the wireless receiving and dispatching daughter board is adopted the betal can encapsulation, the D.C. regulated power supply of AC-DC conversion also adopts the betal can encapsulation, so both reduced the interference of power panel to the wireless receiving and dispatching daughter board, also strengthen the antijamming capability of wireless receiving and dispatching daughter board, thereby improved the performance of wireless receiving and dispatching.
9) the utility model adopt jtag interface can make the PC terminal to its device debug, programming and program burn writing, can also detect the state of collector de-vice processor and give notice, its function effectively and reliable.
Description of drawings
Fig. 1 is the utility model wireless self-networking kilowatt meter reading-out system collector device architecture block diagram.
Fig. 2 adopts the wireless self-networking kilowatt meter reading-out system of the utility model collector to consist of block diagram.
Fig. 3 is the utility model wireless self-networking kilowatt meter reading-out system collector de-vice processor unit schematic diagram.
Fig. 4 is the utility model wireless self-networking kilowatt meter reading-out system collector device 485 Bus Interface Unit schematic diagrams.
Fig. 5 is the utility model wireless self-networking kilowatt meter reading-out system collector device wireless transmit/receive units schematic diagram.
Fig. 6 is the utility model wireless self-networking kilowatt meter reading-out system collector installation's power source administrative unit schematic diagram.
Fig. 7 is wireless self-networking kilowatt meter reading-out system collector device operation method process flow diagram.
Embodiment
Accompanying drawing below in conjunction with in the utility model embodiment is further elaborated to the technical solution of the utility model.Obviously, described example only is a part of example of the present utility model, rather than whole embodiment, and protection domain of the present utility model is including, but not limited to described embodiment.
As shown in Figure 2, the application scenarios schematic diagram for the utility model embodiment comprises:
Intelligent electric meter 2-1: be used for metering and show user's power information, with user's power information with regularly or the mode of responding at random be transferred to collector; Also be used for the order of response collector, the operation such as carry out zero clearing, calibrate, freeze.
Collector 2-2: be used for to be in one of the same space or many intelligent electric meters and couple together by 485 buses, gather power information, and can control institute's connection ammeter; In addition, collector can also communicate according to the requirement of system and concentrator or repeater, sends the data that collect to concentrator in the mode of direct or relaying; Perhaps from repeater or concentrator receives orders and then the intelligent electric meter that connects is carried out corresponding operating.
Repeater 2-3: can communicate by repeater between collector and the concentrator, and then enlarge the communication range of system; Repeater can only possess radio transmission-receiving function, and data are transmitted; Repeater also can be born by the fewer collector of Processing tasks.
Concentrator 2-4: concentrator is used for receiving order from remote control center, and then carries out corresponding operating to the collector transmitting order to lower levels; Also can be used for converging the data from collector or repeater, and transfer to the telemanagement center by the mobile networks such as CDMA, GSM, GPRS, 3G, LTE, Wi-Fi, WiMax or the fixed networks such as EPON, PSTN, Ethernet; Concentrator also can the connecting small-sized local management unit, and the electric energy is among a small circle monitored and managed.
Telemanagement center 2-5: the computing machine (PC, server or data center) that is used for the operation Power management information system, link to each other with concentrator by mobile network or fixed network, regularly or respond at any time the energy information in the administrative area is collected, jurisdiction concentrator, collector and ammeter are carried out control and management; The telemanagement center can utilize data center and cloud service, for Utilities Electric Co. and local user provide the in good time services such as power information calculating, issue, inquiry, statistical report form, energy consuming curve and electric fees charging.
The utility model embodiment provides a kind of wireless self-networking kilowatt meter reading-out system collector device, as shown in Figure 1, comprises that processor unit 1,485 Bus Interface Units 2, wireless transmit/receive units 3 and Power Management Unit 4 consist of; Processor unit is computing and the control center of whole device; 485 Bus Interface Units are used for connecting one or many intelligent electric meters, and are connected with described processor unit with the GPIO mouth by the UART mouth; Wireless transmit/receive units is responsible for concentrator interaction data and the order with the wireless self-networking kilowatt meter reading-out system; Power Management Unit provides power supply for whole device.
Processor unit 1 is made of processor, debugging interface, crystal oscillating circuit, expansion concentrator marker and extended memory etc.As shown in Figure 3, processor U5 is ATmega128, ATmega128L/A or MSP430, operation C language, the functions such as its main settling signal control, data-switching, data operation, protocol communication and algorithm process; 49,50,51 pins of U5 connect respectively red, green, yellow LED and pull-up resistor, in order to the running status of debugging and indicating device; As shown in Figure 3, U5 meets respectively passive crystal oscillator Y132.768Khz and Y27.3728Mhz, is in low-power consumption mode and normal mode of operation lower time provides clock source for processor at device respectively; As shown in Figure 3, the TDI of U5, TDO, TMS, TCK pin connect the J4JTAG debugging interface through pull-up resistor respectively, realize the inside Flash programming to processor U5, and U5 is debugged; As shown in Figure 3, the TXD1 of U5, RXD1, FL_CLK pin connect respectively SI, SO, the SCK pin of outer extension memory U6, and processor U5 realizes and the communicating by letter of extended memory U6 with GPIO mouth simulation SPI agreement at software; U6 selects AT45DB041B, as non-volatile memory medium, is used for the energy data that storage of collected arrives; The SRIAL_ID pin of U5 connects the Data pin that extends out concentrator marker U7, and U7 selects DS2401, has globally unique 48 random codes, in order to indicate the uniqueness of collector device, also can be the MAC Address of radio communication.
As shown in Figure 4,485 Bus Interface Units 2 comprise photoelectrical coupler U3 and RS485-TTL level translator U4 and interlock circuit; Wherein U3 links to each other with processor U5 with the 485CTL pin by RXD0, TXD0, realizes respectively reception, transmission and the transmit-receive position control of data; U3 is made of U3A, U3B, U3C, selects TLP5421, realizes the electrical isolation between processor unit and the intelligent electric meter interface; U4 realizes the RS485-TTL level conversion, selects MAX1487E; The operating voltage of U4 is+5V that when DE was low level, U4 entered accepting state; When DE was high level, U4 entered the transmission state; Under accepting state, when VA-VB＞200mv, reception be logical one; When VA-VB＜-during 200mv, reception be logical zero; 485 Bus Interface Units 2 adopt the half-duplex operation mode, and the direction of transmitting-receiving is by the 485CTL pin control of processor U5.
As shown in Figure 5, wireless transmit/receive units 3 is comprised of connector (J1, J4), radio frequency chip (U1), balance match circuit and antenna; The SI of radio frequency chip, SO, SCLK, CSn, GDO0, GDO2 pin respectively on connector J1 and collector device motherboard MOSI, MISO, SCLK, CSn, 7,9 pins of processor U1 link to each other, realize the feedback of the connected sum radio frequency chip state of SPI interface; J4 draws+the 3.3V power supply from the motherboard of collector device, is the radio frequency chip power supply behind the filtering circuit that L5, C8, C9 form; J1, J4 can also provide support for the wireless receiving and dispatching daughter board, make on its motherboard that is fixed on the collector device; Radio frequency chip is selected CC1100E, and working frequency range is 470Mhz-510Mhz, and data rate can reach 500Kbps, and channel disturbance is few, and penetration capacity is strong, and the functions such as modulation /demodulation, data processing and data buffer storage are provided; As shown in Figure 5, L1, L2, C2, C3, C4 consist of balanced-to-unblanced transformer, and L3, L4, C5, C6, C7 form signal filter circuit; Described antenna is that the core work frequency is the columnar antenna of 480Mhz, and length is 17cm, is connected with the wireless receiving and dispatching daughter board by the SMA interface; The wireless transmit/receive units 3 main functions such as transmitting-receiving, filtering, modulation /demodulation, data processing and data buffering of being responsible for wireless signal.
As shown in Figure 6, Power Management Unit 4 mainly is comprised of U1 and U2 and interlock circuit.Power management chip U1 general+5V direct-current input power supplying is converted to+output of 3.3V direct supply, is motherboard and the power supply of wireless receiving and dispatching daughter board of collector device; Power management chip U2 finishes+the 5V input and+DC-DC isolation between the 5V out-put supply, be the power supplies of 485 Bus Interface Units on the motherboard; U1 can select AMS1117M3, and U2 can select ZY0505BS-1W.
As shown in Figure 7, a kind of operation method of wireless self-networking kilowatt meter reading-out system collector device, step is as follows:
(1) after collector powered on, at first completion system initialization of processor unit comprised: the initialization of SPI interface initialization, the initialization of UART mouth, GPIO mouth, the initialization of LED and the initialization of CC1100E etc.Wherein the initialization of CC1100E mainly comprises electrification reset, register configuration and power amplifier configuration etc.
(2) processor unit is in idle pulley.
(3) processor unit is from wireless transmit/receive units receive data bag:
(3-1) wireless transmit/receive units triggers interruption by the level saltus step after wireless listening detection is received packet;
(3-2) the set packet receives sign in interrupt handling routine, and then triggers the receive data by wireless task;
If (3-3) data packet length is long, abandon this packet, empty data receiver FIFO buffer RXFIFO, return step (2); Otherwise enter step (3-4);
(3-4) packet that receives is stored in the wireless receiving buffer zone that processor unit distributes.
(4) processor unit is resolved the packet in the wireless receiving buffer zone: if existence then enters step (5) to the operational order of intelligent electric meter; Otherwise empty the wireless receiving buffer zone, return step (2).
(5) the ammeter operational order type that parses according to step (4), processor unit is according to dissimilar request or the command frame of DL/T645-2007 " multifunctional electric energy meter communication protocol " structure encapsulation.
(6) processor unit sends order or claim frame to ammeter:
(6-1) wait for that ammeter returns response frame, if receive at the appointed time response frame, then enter step (7); Otherwise enter step (6-2);
(6-2) judge that whether the number of times that sends same Frame surpasses three times, identifies this operation failure if surpass three times, and returns step (2); Otherwise, return step (6), resend order or claim frame.
(7) after processor order unit receives response frame, response frame is extracted, resolves, judges and calculate according to DL/T 645-2007 " multifunctional electric energy meter communication protocol ", and deposit the power information that obtains in the wireless transmission buffer zone.
(8) processor unit is stored in data communication device in the wireless transmission buffer zone with step (7) and crosses wireless transmit/receive units and send to concentrator:
(8-1) processor unit sends the order " STX " that sends data to wireless transmit/receive units;
(8-2) processor unit sends FIFO buffer TXFIFO with the data that the data in the wireless transmission buffer zone write wireless transmit/receive units;
(8-3) whether processor unit is judged that wireless transmit/receive units sends and is finished, if not then return step (8-3) and continue to wait for; If finish then identifying whole task and finish, empty the wireless transmission buffer zone, return step (2).
As mentioned above, although represented in detail and explained the utility model with reference to specific preferred embodiment, it shall not be construed as the restriction to the utility model self.Under the prerequisite of the spirit and scope of the present utility model that do not break away from the claims definition, can make a variety of changes in the form and details it.
Claims (5)
1. wireless self-networking kilowatt meter reading-out system collector device, it is characterized in that, comprise the computing of being responsible for whole device be connected with control processor unit (1), be used for connecting one or many ammeters the serial bus interface unit, be responsible for and the wireless transmit/receive units (3) of wireless self-networking kilowatt meter reading-out system concentrator interaction data and order and the Power Management Unit (4) that power supply is provided for whole device; The serial bus interface unit is connected with described processor unit (1) with the GPIO mouth by the UART mouth; Wireless transmit/receive units (3) is connected with described processor unit (1);
Described processor unit (1) comprises processor, debugging interface, crystal oscillating circuit, expansion concentrator marker and extended memory; Described processor and debugging interface, expansion concentrator marker and extended memory carry out exchanges data; Crystal oscillating circuit is connected with the crystal oscillating circuit interface of processor;
Described debugging interface comprises jtag interface and serial ports, and jtag interface is used for the programming of program, and serial ports is used for the output of Debugging message; Described expansion concentrator marker is used for the unique address of this collector of sign device; Described extended memory is stored the energy information that collects.
2. wireless self-networking kilowatt meter reading-out system collector device according to claim 1 is characterized in that, processor unit (1), serial bus interface unit and Power Management Unit (4) are positioned on the pcb board, and this pcb board is motherboard; Wireless transmit/receive units (3) is positioned on the pcb board, and this pcb board is the wireless receiving and dispatching daughter board; It is to adopt standard interface to connect that described motherboard is connected with hardware between the wireless receiving and dispatching daughter board.
3. wireless self-networking kilowatt meter reading-out system collector device according to claim 1 is characterized in that, described serial bus interface unit is 485 Bus Interface Units (2); Described 485 Bus Interface Units (2) comprise isolated location and RS485-TTL level conversion unit; Described isolated location is that photoelectrical coupler consists of; Described RS485-TTL level conversion unit is 485 driving transceiving chips; 485 drive between transceiving chips and the described processor unit (1) and are connected photoelectrical coupler;
Described 485 Bus Interface Units (2) are connected with universal input/output interface GPIO with the universal asynchronous serial interface UART of processor.
4. wireless self-networking kilowatt meter reading-out system collector device according to claim 1 and 2 is characterized in that, described wireless transmit/receive units (3) comprises connector, radio frequency chip, balance match circuit and antenna; Connect the balance match circuit between radio frequency chip and the antenna; Wired I/O port of radio frequency chip connects the synchronous serial peripheral interface SPI of processor by connector;
Described connector is used for connecting motherboard and wireless receiving and dispatching daughter board, and provides fixed support and power supply for the wireless receiving and dispatching daughter board;
Described radio frequency chip provides modulation /demodulation, data to process and the data buffer storage function;
Described balance match circuit is finished balance-uneven conversion, impedance matching and signal filtering.
5. wireless self-networking kilowatt meter reading-out system collector device according to claim 4 is characterized in that, described Power Management Unit (4) comprises the buffer circuit of DC-DC change-over circuit, DC input/DC output;
The DC-DC change-over circuit is the DC high voltage of input conversion output DC low-voltage; The buffer circuit of DC input/DC output is isolated the DC high voltage of input and output DC high voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2012201609899U CN202736263U (en) | 2012-04-16 | 2012-04-16 | Collector device of wireless ad hoc network meter reading system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012201609899U CN202736263U (en) | 2012-04-16 | 2012-04-16 | Collector device of wireless ad hoc network meter reading system |
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| CN202736263U true CN202736263U (en) | 2013-02-13 |
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| CN2012201609899U Expired - Fee Related CN202736263U (en) | 2012-04-16 | 2012-04-16 | Collector device of wireless ad hoc network meter reading system |
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| CN103714681A (en) * | 2013-12-27 | 2014-04-09 | 国网内蒙古东部电力有限公司 | Multi-channel wireless meter reading module |
| CN103761849A (en) * | 2014-01-03 | 2014-04-30 | 沈阳中科博微自动化技术有限公司 | CMC (control module on chip)-chip-based low-power-consumption wireless meter reading acquirer |
| CN104103164A (en) * | 2013-04-15 | 2014-10-15 | 成都技高科技有限公司 | Wireless electric power meter reading terminal |
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| CN104103164A (en) * | 2013-04-15 | 2014-10-15 | 成都技高科技有限公司 | Wireless electric power meter reading terminal |
| CN103714681A (en) * | 2013-12-27 | 2014-04-09 | 国网内蒙古东部电力有限公司 | Multi-channel wireless meter reading module |
| CN103761849A (en) * | 2014-01-03 | 2014-04-30 | 沈阳中科博微自动化技术有限公司 | CMC (control module on chip)-chip-based low-power-consumption wireless meter reading acquirer |
| CN104122824A (en) * | 2014-07-28 | 2014-10-29 | 四川中智恒源电气有限公司 | Intelligent industrial tablet management machine |
| CN104123831A (en) * | 2014-07-30 | 2014-10-29 | 党彬 | Signal conversion equipment of remote power meter reading system |
| CN104900043A (en) * | 2015-06-24 | 2015-09-09 | 河南卓正电子科技有限公司 | Instrument bus conversion circuit with short circuit self-protection function |
| CN104900043B (en) * | 2015-06-24 | 2018-04-10 | 河南卓正电子科技有限公司 | Meter bus change-over circuit with short-circuit self-protection function |
| CN109147303A (en) * | 2017-06-19 | 2019-01-04 | 中兴通讯股份有限公司 | Power recorder system and ammeter's reading meter method |
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| CN110706469A (en) * | 2019-10-21 | 2020-01-17 | 贵州电网有限责任公司 | Electric energy meter communication module based on LoRa technique |
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