CN107612591A - A kind of wideband power is registered one's residence terminal system - Google Patents

Abstract

The invention provides a power broadband home terminal system, which is composed of a smart meter, a power conversion module, a switch module, a main control board module, a power modem module and related lines. Through this terminal system, the power grid company can remotely obtain the detailed information of the user's electricity consumption, and remotely control the user's power supply situation when necessary. At the same time, the terminal system of the present invention also modulates the Internet broadband network signal to the power line through the switch module and the power modem module, so that users can access the Internet through the original power line without additional network deployment. Therefore, the present invention combines the advantages of smart grid technology and power line Internet access technology, realizes the dual functions of Internet access and meter reading through only one box, reduces the complexity of network wiring, improves user convenience, and reduces costs.

Description

A power broadband home terminal system

technical field

The invention relates to an intelligent terminal system, in particular to a power broadband home access terminal system, which belongs to the technical field of communication equipment.

Background technique

With the development of society, almost every household is now connected to the Internet, and each family often has more than one device connected to the Internet, such as desktop computers, smartphones, and smart TVs. In the near future, families will Entering the era of the Internet of Things, refrigerators, air conditioners, and televisions will also need to be connected to the Internet. If these devices rely on network cables for networking, the wiring layout will be messy. If wireless routers are used for networking, there will be problems such as unstable signals and serious interference. Since most of the devices that need to be connected to the Internet are powered by the power line, if the power line carrier technology is used to modulate the incoming network signal to the home's home power line, all smart devices in the home can be powered by the power line or connected to the Internet through the power line , thus solving the above problems well.

At the same time, at the beginning of the 21st century, the power grid also proposed the concept of smart grid. Traditional power grid monitoring requires a lot of manpower for meter reading, equipment inspection, and circuit short-circuit control. Its operation efficiency is low, failures occur frequently, and labor costs are high. Therefore, relevant smart grid technologies are urgently needed in the market to replace manpower. Using smart grid technologies, multiple functions such as remote meter reading, remote fault detection, remote fault isolation, and remote control can be realized.

Contents of the invention

The purpose of the present invention is to provide a power broadband home terminal system. While realizing the basic functions of the smart grid, it can also make all the smart devices in the user's home No additional network deployment is required, and the original power line can be used to achieve stable Internet access.

Concrete technical scheme of the present invention is as follows:

A power broadband home access terminal system is composed of a smart meter, a power conversion module, a switch module, a main control board module, a power modem module and related circuits.

The smart meter is provided with an input interface and an output interface of live wire and neutral line and an RS485 interface, and the RS485 interface of the smart meter is connected with the main control board module through the RS485 bus to perform two-way data exchange; the smart meter measures and displays the power reading in real time, Receive the command of the main control board module through the RS485 bus and upload the power reading to the main control board module.

The input end of the power conversion module is provided with a live wire and a neutral wire respectively connected to the output interfaces of the live wire and the neutral wire of the smart meter, and the output end of the power conversion module is respectively connected to the main control board module and the switch module to supply power for it.

The switch module is constructed with a 3-port Gigabit switch module, which has three 10/100/1000Mbps adaptive RJ45 ports, wherein the first RJ45 port is connected to the external network to realize external network communication functions; the second RJ45 port The port is connected to the power modem module, and the external network is converted through the power modem module, and the channel of the Internet is transferred to the power line; the third RJ45 port is connected to the main control board module, and the external network realizes two-way data information through the main control board module and the smart meter exchange.

The power cat module adopts the internal module of the conventional power cat to construct, and the interface of the live wire and the neutral wire of the power cat module is provided with the output interface of the live wire and the neutral wire connected to the live wire and the neutral wire of the smart meter respectively, and the RJ45 port of the power cat module There is a network cable connected to the second RJ45 port of the switch module; the power modem module modulates the external network signal transmitted from the switch module to the indoor power line.

The main control board module integrates an Ethernet module, a power interface module, an indicator light module, and an MCU module; the Ethernet module adopts a USR-TCP232-E2 embedded Ethernet module, which integrates a WEB server function inside, and its network interface terminal There is a network cable connected to the third RJ45 port of the switch module, and its signal end is connected to the MCU module; the power interface module undertakes the power supply of the power conversion module, and then converts it into a variety of voltage interfaces to supply power to the main control board module; the indicator light module is set There are 2 working indicators and a group of colorful indicators. The indicator module is connected to the MCU module and the working indicator indicates the working status of the entire main control board module; the MCU module is composed of STM32 series chips and peripheral circuits. As the main control part of the entire main control board module, it is provided with an RS485 interface and is connected to the RS485 interface of the smart meter through the RS485 bus.

The smart meter can use the DDS862 single-phase electronic energy meter of Samsung Smart Company; the power cat module can be constructed by dismantling the internal module of the TP-LINK PA500 power cat.

The smart meter, the power conversion module, the switch module, the main control board module, and the power modem module of the terminal system of the present invention are packaged into one body with a plastic casing, and the input and output interfaces of the hot wire and the neutral wire of the smart meter are left externally, and the switch module is the first A RJ45 port, the power reading part of the smart meter and the indicator light of the indicator light module of the main control board module are exposed from the shell shell.

When the power broadband home terminal system is in use, the input and output interfaces of the live wire and neutral wire of the smart meter are connected in series to the live wire and neutral wire of the home, and the network cable of the external network is connected to the switch module of the terminal system The first RJ45 port is connected to the external network. The power grid company accesses the smart meter through the switch module and the main control board module through the external network. Through this method, the power grid company can remotely monitor the specific electricity consumption data information of the user in real time, and the power grid company can also send control information from the company to the terminal system through the external network. Information and control information enter the main control board module through the switch module, and the main control board module controls the smart meter after data processing and protocol analysis. In this way, when the user is in arrears or abnormal power consumption, the power grid company can remotely cut off the user's power supply when necessary. In addition, the Internet broadband for home can be modulated from the external network to the home power line through the switch module and the power modem module, so that all smart devices in the home can go online through the power line.

The power broadband home terminal system of the present invention is composed of a smart meter, a power conversion module, a switch module, a main control board module, a power modem module and related circuits. Through this terminal system, the power grid company can remotely obtain the detailed information of the user's electricity consumption, and remotely control the user's power supply situation when necessary. At the same time, the terminal system of the present invention also modulates the Internet broadband network signal to the power line through the switch module and the power modem module, so that users can access the Internet through the original power line without additional network deployment. Therefore, the present invention combines the advantages of smart grid technology and power line Internet access technology, realizes the dual functions of Internet access and meter reading through only one box, reduces the complexity of network wiring, improves user convenience, and reduces costs.

Description of drawings

Fig. 1 is a schematic diagram of the hardware composition of the power broadband home terminal system of the present invention.

Figure 2 is the byte format of the communication protocol between the main control board module and the smart meter.

Figure 3 is the frame format of the communication protocol between the main control board module and the smart meter.

Fig. 4 is a block diagram of the power conversion module.

Fig. 5 is a circuit diagram of the MCU module of the main control board module.

Figure 6 is the RS485 interface conversion circuit diagram of the MCU module.

Fig. 7 is an interface circuit diagram of the MCU module and the Ethernet module.

Fig. 8 is a connection diagram of the core circuit of the Ethernet module of the main control board module.

FIG. 9 is a circuit diagram of the power interface module of the main control board module.

Fig. 10 is a circuit diagram of the working indicator light of the indicator light module of the main control board module.

Figure 11 is a flow chart of the main control board module controlling data uplink.

Figure 12 is a flow chart of the main control board module controlling data downlink.

detailed description

The present invention will be further described below in conjunction with the accompanying drawings.

As shown in Figure 1, this power broadband home terminal system consists of smart meters, power conversion modules, switch modules, main control board modules, power modem modules and related lines.

The smart meter adopts the DDS862 single-phase electronic energy meter of Samsung Smart Company. The smart meter is provided with an input interface and an output interface of live wire and neutral line, and an RS485 interface. The RS485 interface of the smart meter is connected to the main control board module through the RS485 bus for two-way data exchange. The smart meter measures and displays the power readings in real time, receives instructions from the main control board module through the RS485 bus and uploads the power readings to the main control board module. The communication protocols between the main control board module and the smart meter are set as follows:

1), byte format

Each byte contains 8-bit binary code, plus a start bit (0), an even parity bit and a stop bit (1) during transmission, a total of 11 bits. The transmission sequence is shown in Figure 2, D0 is the least significant bit of the byte, D7 is the most significant bit of the byte, the low bit is transmitted first, and the high bit is passed later.

2), frame format

The frame format is shown in Figure 3. The check code part in the frame format is generated according to the following algorithm:

(1) Arrange the data from the frame start symbol to all the data in the frame data field according to the binary sequence of 0 and 1 to form a long sequence composed of 0 and 1, which is recorded as K;

(2) Set the following groups of numbers: a, 1011; b, 1001 10; c, 1101 0011; d, 1101 0011 10; f, 1011 11111101; g, 1011 1110 0011 0101;

(3) XOR the sequence K with any sequence from a to f, which sequence to choose is determined according to the actual communication rate and error tolerance, and then add an 8-bit parity bit to the operation result , put the entire required sequence into the check digit as the overall check data.

3), frame format data domain part

In order to further increase the error tolerance of the data and make it easier to find the wrong data, a number is added at the end of the frame format data field, which is the sum of all numbers in the data field. Since the data change of the smart meter may not be very large in a short period of time, but if it encounters strong interference such as lightning strikes and large-scale motor startup, the signal line will often be full-biased or set to zero. At this time, the local or overall data change is very large. On the server side, by deriving this number and judging the smoothness of the derivative, we can find out whether the number of the entire frame is reliable, and discard the unreliable data.

In the calculation process of this number, in order to reduce the time complexity of processing the data domain in the frame format and reduce the impact of partial processing on the entire frame format, the calculation method is: call N addition units of the MCU module in the main control board module, Each addition unit only adds two numbers, and then outputs the sum of these two numbers, and then calls N/2 addition units to add the aforementioned numbers in groups of two, output the sum, and then Call N/4 addition units again, repeat the above steps, and finally get a digital sum. When the amount of data in the frame format data field is relatively large, the local processing delay will not increase significantly.

The input end of the power conversion module is provided with a live wire and a neutral wire respectively connected to the output interfaces of the live wire and the neutral wire of the smart meter, and the output end of the power conversion module is respectively connected to the main control board module and the switch module to supply power for it. Further, as shown in FIG. 4, the power conversion module includes a current transformer, an isolator, a bridge rectifier, a filter, a voltage regulator tube, a charging and discharging controller, and an energy storage battery; the current transformer is hung on the power line, The principle of electromagnetic induction is used to take power from the power line; the isolator is connected to the current transformer to further isolate strong electric interference and ensure safety; the rectifier is connected to the isolator to realize AC-DC conversion; the filter is connected to the bridge rectifier to eliminate The high-order harmonic interference of the bridge rectifier; the voltage regulator tube is connected to the filter to provide a stable voltage for the device; the charge and discharge controller is connected to the voltage regulator tube, and the voltage of the voltage regulator tube is further filtered and stabilized Output 12V power from the output terminal, and at the same time, the charging and discharging controller will charge the energy storage battery. Power supply for board modules and switch modules.

The switch module is constructed with a 3-port Gigabit switch module, which has three 10/100/1000Mbps adaptive RJ45 ports, wherein the first RJ45 port is connected to the external network to realize external network communication functions; the second RJ45 port The port is connected to the power modem module, and the external network is converted through the power modem module, and the channel of the Internet is transferred to the power line, so that all smart devices in the home can access the Internet through the power line; the third RJ45 port is connected to the main control board module, so that the external The network realizes two-way data information exchange with the smart meter through the main control board module. Through this method, the power grid company can monitor the specific electricity consumption data information of users in real time. At the same time, the power grid company can also send control information from the company to the terminal system through the external network. The control information enters the main control board module through the switch module, and the main control board module controls the smart meter module after data processing and protocol analysis. In this way, when the user is in arrears or abnormal power consumption, the power grid company can remotely cut off the user's power supply when necessary.

The power cat module is constructed by dismantling the internal module of TP-LINK PA500 power cat. The interfaces of the live wire and the neutral wire of the power cat module are respectively provided with the output interfaces of the live wire and the neutral wire connected to the live wire and the neutral wire of the smart meter. The RJ45 port of the power modem module is connected with the second RJ45 port of the switch module with a network cable. The power modem module modulates the external network signal transmitted from the switch module to the indoor power line, so that users can access the Internet through the power line and the power socket, which saves troublesome network wiring and solves the problem of unstable signals when using a wireless router. , a serious problem of interference.

The main control board module integrates an Ethernet module, a power interface module, an indicator light module, and an MCU module. The MCU module is composed of an STM32F103 chip and peripheral circuits, which are used as the main control part of the entire main control board module; as shown in Figure 5, pins 68 and 69 of the STM32F103 chip are connected in series with resistors R3 and R41 respectively as signal receiving terminals RXD and signal sending terminal TXD, pins 12 and 13 of the STM32F103 chip are connected to the external clock circuit, pin 14 is connected to the reset circuit; VDD3.3V is connected to one end of the inductor L1, the other end of the inductor L1 is connected to one end of the capacitors C3 and C4, and the capacitor C3 and the other end of C4 are grounded, and the other end of the inductor L1 is connected to pin 22 of the STM32F103 chip as the VDDA end; the VDD5V end is converted into a standard 3.3V power supply by the REF3133 chip, and then connected in series with the resistor R12 and then input to the 21 pin of the STM32F103 chip as the reference positive The voltage VREF+ terminal, the two ends of the resistor R12 are connected in series with the capacitors C9 and C10 respectively, and then connected to the PGND terminal; pins 50, 75, 100, 28, and 11 of the STM32F103 chip are connected to the VDD3.3V terminal, and the VDD3.3V terminal is connected to the capacitor C13～C20 One end of the capacitors C13-C20 is grounded; the MCU module is provided with an RS485 bus interface and is connected to the RS485 interface of the smart meter through the RS485 bus. As shown in Figure 6, pins 47 and 48 of the STM32F103 chip are respectively connected in series Resistors R6 and R40 are connected to pin 4 and pin 1 of the RS485 interface communication chip MAX485 chip, pin 52 of the STM32F103 chip is connected to pin 2 and pin 3 of the MAX485 chip, pin 8 of the MAX485 chip is connected to the VDD5V terminal, pin 5 is grounded, pin 7 and The 6 pins are respectively connected to the 1 pin and 2 pin of the RS485 conversion connector J1, and the resistor R2 is also connected between the 7 pin and the 6 pin of the MAX485 chip; the MCU module is also connected to the Ethernet module through the super network port USR-K3, As shown in Figure 7, the signal receiving terminal RXD and the signal transmitting terminal TXD of the STM32F103 chip are respectively connected to pin 8 and pin 9 of the super network port USR-K3.

The Ethernet module adopts a USR-TCP232-E2 embedded Ethernet module, which is used for protocol conversion, data extraction, data packaging and uploading to the server of the data of the MCU module, and the WEB server function is also integrated inside it. Through this module, home users can enter the address of the WEB server on the computer browser at home, so that they can see all the information of the smart meter and the information returned by the power grid company through the computer, including power consumption, remaining electricity charges, consumption Electric power, active power, reactive power, power quality conditions, harmonic conditions, etc. The network interface end of described Ethernet module is provided with the 3rd RJ45 port of network cable connection switch module, and its signal end is connected to MCU module, and TCP/IP protocol stack is integrated in it, utilize this module to be able to send TCP network packet or UDP data packets and TTL serial port data realize transparent transmission, and its core circuit connection diagram is shown in Figure 8.

The power interface module accepts the power supply of the power conversion module, and then converts it into multiple voltage interfaces such as 5V and 3.3V to supply power to the main control board module. The circuit diagram of the power interface module is shown in Figure 9. The power supply passes through the fuse FUSE1 to form the VIN terminal of the input power supply, and the VIN terminal of the input power supply is adjusted by the adjustable voltage regulator chip LM2596-ADJ chip to form the VCC6.5V terminal; the VCC6.5V terminal is formed after being stepped down by the voltage regulator chip REG1117-3.3 chip The VDD3.3V terminal; the VCC6.5V terminal is adjusted by the adjustable voltage regulator chip LP3856-ADJ chip to form the VDD5V terminal; the VDD5V terminal is connected to one end of the resistor R26, the other end of the resistor R26 is connected in series with the resistor R28 and grounded, and the other end of the resistor R26 It is also used as an output to connect to the 18-pin AD_DCIN terminal of the STM32F103 chip; VCC6.5V is connected to one end of the TR5V L-S-Z relay RELAY1 coil and the negative pole of the diode D2, and the other end of the relay RELAY1 coil and the positive pole of the diode D2 are connected to the NPN transistor Q3 The collector of the transistor Q3 is grounded, the base is connected to one end of the resistors R25 and R27, the other end of the resistor R25 is connected to the 15-pin JD_5V end of the STM32F103 chip, the other end of the resistor R27 is grounded, and the moving contact of the relay RELAY1 is connected to VDD5V Terminal, the normally open static contact of the relay RELAY1 is connected in series with the resistor R21 to form an external output VCC5V terminal. When using it, the voltage of the 18-pin AD_DCIN terminal of the STM32F103 chip must be input to load the voltage of the 15-pin JD_5V terminal of the STM32F103 chip to the transistor Q3 The base of the transistor Q3 is turned on, the relay RELAY1 coil is energized and closed, the moving contact of the relay RELAY1 is connected to the normally open static contact, and the VDD5V terminal supplies power to the VCC5V terminal and outputs to the outside.

The indicator light module is provided with two working indicator lights and a group of colorful indicator lights, the indicator light module is connected with the MCU module and the working status of the whole main control board module is indicated by the working indicator light, the part of the working indicator light is shown in the figure As shown in 10, the VDD5V terminal is connected in series with the resistor R13 and then connected to the positive pole of the indicator light Fault, and the negative pole of the indicator light Fault is connected to the collector of the NPN transistor Q1. The emitter of Q1 is grounded. If the work is abnormal, the indicator light Fault will be controlled by the MCU module to emit light; the VDD5V terminal is connected in series with the resistor R14 and then connected to the positive pole of the indicator Run, and the negative pole of the indicator Run is connected to the collector of the NPN transistor Q2, and the STM32F103 chip The 32-pin is connected in series with the resistor R19 and then connected to the base of the triode Q2, and the emitter of the triode Q2 is grounded. If it works normally, the MCU module will control the indicator Run to emit light.

As shown in Figure 11 and Figure 12, the control workflow of the main control board module includes two parts: data uplink and data downlink, specifically as follows:

(1) Data upload workflow

a) Each module is powered on and initialized;

b) The MCU module checks whether the smart meter module, power conversion module, switch module, power modem module, and Ethernet module are normal, and if any abnormality is found, the indicator light module indicates a fault;

c) The MCU module reads the data information of the smart meter through the RS485 interface. The data information includes but not limited to power consumption, remaining power, active power, reactive power, harmonic conditions, and power quality information. If abnormalities are found, the indicator light The module indicates a fault;

d) The MCU module integrates the obtained data information according to the format of the communication protocol between the main control board module and the smart meter, and adds a check code, and then uploads it to the Ethernet module, and the Ethernet module uploads the data to the power grid through the switch module The WEB server pointed to by the company server and the Ethernet module;

e) The grid company can remotely read the user's electricity consumption information collected by the smart meter through the server of the grid company, and at the same time, the user can enter the WEB server address in the browser through the computer to view the user's electricity consumption information collected by the smart meter from the web page.

(2) Data downlink workflow

a) Each module is powered on and initialized;

b) The MCU module checks whether the smart meter module, power conversion module, switch module, power modem module, and Ethernet module are normal, and if any abnormality is found, the indicator light module indicates a fault;

c) Set the IP address and corresponding port number for listening data in the MCU module;

d) The power grid company server sends command data to the Ethernet module through the switch, and then the Ethernet module sends the data to the MCU module. The MCU module controls the data to be intercepted. If it encounters the data that needs to be intercepted, it parses it. Analyze its control commands and transmit them to the WEB server pointed to by the smart meter and the Ethernet module. If the MCU module cannot listen to the data for a long time, the indicator module will indicate a fault;

e) The MCU module transmits the control command to the smart meter through the RS485 interface, and the smart meter executes the control command, such as power off, etc.; the user can enter the WEB server address in the browser through the computer, and view the information from the power grid company from the web page, such as Price changes, etc.

In step e) of the data downlink workflow, the MCU module also analyzes the information sent by the power grid company received by the Ethernet module, and sends part of the data information to the WEB server, and the user can see the corresponding information through the computer browser. And input several data reference values through the browser, the MCU module stores the reference value input by the user and compares it with the data sent by the power grid company, calculates the size of the deviation, and the MCU module controls the colorfulness of the indicator light module according to the size of the deviation value The indicator lights are indicated with different colors, and the deviation value is sent to the WEB server for users to see. For example: users can see the electricity price information sent by the grid company through a computer browser, and set several reference values of electricity prices by themselves. The MCU module will compare the electricity price issued by the grid company with the reference price, and calculate the size of the deviation. The MCU module controls the colorful indicator lights of the indicator light module to indicate with different colors according to the size of the deviation value, and at the same time sends the deviation value to the WEB server for the user to see. In this way, users can intuitively understand the current electricity price and the expected electricity price, so as to use electricity reasonably. In turn, the power grid company can adjust the electricity price according to the electricity load situation. Through this setting, users can learn more about changes in electricity prices in a timely manner, and flexibly adjust their own electricity consumption, which can not only save electricity costs, but also cooperate with the grid company to adjust loads in a timely manner.

The above illustrations are only typical embodiments of the present invention and are not intended to limit the present invention. Any modifications or equivalent replacements and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the present invention .

Claims (8)

1. The terminal system 1. a kind of wideband power is registered one's residence, it is characterized in that：By intelligent electric meter, power transfer module, switch module, master Control plate module, Homeplug module and line related composition；

   The intelligent electric meter is provided with the input interface and output interface and RS485 interfaces of live wire and zero line, intelligent electric meter RS485 interfaces are connected to carry out bidirectional data exchange by RS485 buses with master control plate module；Intelligent electric meter measurement in real time is simultaneously Electricity reading is shown, the instruction of master control plate module is received by RS485 buses and electricity reading is uploaded to master control plate module；

   The input of the power transfer module connects provided with the output of live wire and zero line respectively with the live wire and zero line of intelligent electric meter Mouth is connected, and the output end of power transfer module connects master control plate module and switch module and powered for it respectively；

   The switch module is built using 3 mouthfuls of gigabit switch modules, and it has 3 10/100/1000Mbps Adaptive RJ45 ports, wherein first RJ45 ports connection external network, realizes external network communicating function；Second RJ45 ports connect Homeplug module, and external network is changed by Homeplug module, by the channel transfer of online to electricity In the line of force；3rd RJ45 port connects master control plate module, and external network is realized two-way by master control plate module with intelligent electric meter Data information exchange；

   The Homeplug module is built using conventional electric power cat internal module, the live wire of Homeplug module and the interface of zero line It is respectively equipped with live wire and zero line is connected to the live wire of intelligent electric meter and the output interface of zero line, the RJ45 ports of Homeplug module It is connected provided with netting twine with second RJ45 port of switch module；Homeplug module will transmit from switch module External network signal modulation to interior power line on；

   The master control plate module is integrated with ethernet module, power supply interface module, indicating lamp module, MCU module；Ethernet module Using USR-TCP232-E2 embedded ethernet modules, it has been internally integrated WEB server function, and its network interface end is provided with Netting twine connects the 3rd RJ45 port of switch module, and its signal end is connected to MCU module；Power supply interface module accepts electricity The power supply of source modular converter, and then be converted into multiple voltage interface and be powered for master control plate module；Indicating lamp module is provided with 2 Relay indicating light and one group of colorful indicator lamp, indicating lamp module are connected with MCU module and by relay indicating light to whole master control The working condition of plate module is indicated；MCU module is made up of STM32 family chips and peripheral circuit, and it is as whole master control The main control part of plate module, it is provided with RS485 interfaces and is connected by RS485 buses with the RS485 interfaces of intelligent electric meter；

   The communication protocol of the master control plate module and intelligent electric meter is arranged to：

   1）, byte format

   Contain 8 binary codes per byte, add a start bit during transmission（0）, even parity bit and a stop position（1）, Totally 11, D0 is the least significant bit of byte, and D7 is the highest significant position of byte, first passes low level, rear to pass a high position；

   2）, frame format

   Check code part in frame format generates according to following algorithm：

   （1）By the data of start-of-frame until the total data in frame data domain is arranged according to the binary sequence of 0 and 1, The a lot of sequence being made up of 0 and 1 is formed, is designated as K；

   （2）Following groups number is set：a、1011；b、1001 10；c、1101 0011；d、1101 0011 10；f、1011 1111 1101 ；g、1011 1110 0011 0101；

   （3）Arbitrary sequence in sequence K and a to f is subjected to XOR, which specifically chosen sequence is according to practical communication speed Rate, the tolerance to mistake are determined, and 8bit parity check bit is then added in operation result, by whole total need Want sequence to be put into check bit and be used as overall verification data；

   3）, frame format data field part

   At the end of frame format data field, a numeral is added, this numeral is all digital sums of data field, computational methods For：N number of adder unit of MCU module in master control plate module is called, each adder unit is only added two numbers, then exports this The sum of two numbers, N/2 adder unit is recalled, be added by foregoing numeral and with two for one group, exported and enter And recall N/4 adder unit, repeat above step, finally draw a numeral and；

   The control workflow of the master control plate module includes two parts of data uplink and data downstream, specific as follows：

   （1）Data uplink workflow

   a）Electricity, initialization in each module；

   b）MCU module checks that intelligent ammeter module, power transfer module, switch module, Homeplug module, ethernet module are It is no normal, if it find that abnormal, indicating lamp module instruction failure；

   c）MCU module reads the data message of intelligent electric meter by RS485 interfaces, data message includes but be not limited to power consumption, Dump energy, active power, reactive power, harmonic wave situation, the information of the quality of power supply, if it find that abnormal, indicating lamp module refers to Show failure；

   d）MCU module carries out obtained data message according to the form of master control plate module and the communication protocol of intelligent electric meter whole Close, and add check code, then be uploaded to ethernet module, power network public affairs are upload the data to through switch module by ethernet module The WEB server that department's server and ethernet module are internally pointed to；

   e）Grid company can read the user power utilization information that intelligent electric meter gathers, while user by grid company Server remote WEB server address can be inputted in a browser by computer, the user power utilization information of intelligent electric meter collection is checked from webpage；

   （2）Data downstream workflow

   a）Electricity, initialization in each module；

   b）MCU module checks that intelligent ammeter module, power transfer module, switch module, Homeplug module, ethernet module are It is no normal, if it find that abnormal, indicating lamp module instruction failure；

   c）The IP address of interception data and corresponding port numbers are set in MCU module；

   d）Grid company server sends director data and is passed to ethernet module by interchanger, then by ethernet module by data MCU module is sent to, the data to be intercepted of MCU module control, if running into the data for needing to intercept, is parsed, analyzes it Control instruction, and transmit in the WEB server being internally pointed to intelligent electric meter and ethernet module, as MCU module is detectd for a long time It can't hear data, indicating lamp module instruction failure；

   e）Control instruction is transmitted to intelligent electric meter, intelligent electric meter and performs control instruction by MCU module by RS485 interfaces；User WEB server address can be inputted in a browser by computer, the information that grid company transmits is checked from webpage.
2. 2. terminal system according to claim 1, it is characterized in that：In the step e of data downstream workflow）In, MCU moulds The information that block is sent always according to the grid company that ethernet module receives is analyzed, and same data message is sent into WEB On server, user sees corresponding information by computer browser, and inputs several data reference values, MCU by browser The reference value that user inputs is stored and compared with the data that grid company is sent by module, calculates the big of deviation Small, MCU module controls the colorful indicator lamp of indicating lamp module to be indicated with different colors according to the size of deviation value, simultaneously Will deviate from value transmission allows user to see to WEB server.
3. 3. terminal system according to claim 1, it is characterized in that：The intelligent electric meter is using Samsung intelligence company DDS862 single-phase electronic energy meters；The Homeplug module is entered using the TP-LINK PA500 Homeplug internal modules disassembled Row structure.
4. 4. terminal system according to claim 1, it is characterized in that：The intelligent electric meter, power transfer module, interchanger mould Block, master control plate module, Homeplug module encapsulated with plastic casing it is integral, externally leave intelligent electric meter live wire and zero line it is defeated Enter and output interface, first RJ45 port of switch module, the electricity reading part of intelligent electric meter and the finger of master control plate module Show that the indicator lamp of lamp module reveals out of case body.
5. 5. terminal system according to claim 1, it is characterized in that：The power transfer module include current transformer, every From device, bridge rectifier, wave filter, voltage-stabiliser tube, charging-discharging controller, energy-storage battery；Current transformer is hung on power line, profit With the principle of electromagnetic induction from power line power taking；Isolator is connected to current transformer, isolation forceful electric power interference；Rectifier is connected to Isolator, realize AC-DC conversion；Wave filter is connected to bridge rectifier, eliminates the higher hamonic wave interference of bridge rectifier；Surely Pressure pipe is connected to wave filter, and burning voltage is provided to equipment；Charging-discharging controller is connected to voltage-stabiliser tube, and the voltage of voltage-stabiliser tube is passed through 12V power supplys are outwards exported from output end after crossing further filtering and voltage stabilizing processing, while charging-discharging controller returns energy-storage battery Charged, when outside has a power failure, charging-discharging controller, which will switch to, to be provided electric energy by energy-storage battery and outwards export 12V power supplys.
6. 6. terminal system according to claim 1, it is characterized in that：The MCU module of the master control plate module is by STM32F103 Chip and peripheral circuit are formed, and are received after 68,69 pin difference series resistor R3, R41 of STM32F103 chips respectively as signal 12 and 13 pin of end RXD and signal sending end TXD, STM32F103 chip connect outer clock circuit, and 14 pin connect reset circuit； VDD3.3V termination inductance L1 one end, inductance L1 another termination capacitor C3 and C4 one end, electric capacity C3 and C4 another termination Ground, the inductance L1 other end terminate 22 pin into STM32F103 chips as VDDA；VDD5V ends are converted to through REF3133 chips Standard 3.3V power supplys, then 21 pin of STM32F103 chips are inputted after series resistor R12 as benchmark positive voltage VREF+ ends, resistance Also serial capacitance C9, C10 is followed by PGND ends respectively at R12 both ends；50,75,100,28,11 pin of STM32F103 chips connect VDD3.3V ends, VDD3.3V termination capacitors C13~C20 one end, electric capacity C13~C20 other end ground connection；The MCU module Provided with RS485 EBIs, RS485 interface communications are accessed after 47,48 pin difference series resistor R6, R40 of STM32F103 chips 4 pin and 1 pin of chip MAX485 chips, 52 pin of STM32F103 chips connect the 2 of MAX485 chips, 3 pin, and the 8 of MAX485 chips Pin connects VDD5V ends, 5 pin ground connection, and 7 pin and 6 pin connect RS485 crossover subs J1 1 pin and 2 pin respectively, 7 pin of MAX485 chips and Resistance R2 is also associated between 6 pin；The MCU module is also connected by super network interface USR-K3 with ethernet module, The signal receiving end RXD and signal sending end TXD of STM32F103 chips connect super network interface USR-K3 8 pin and 9 pin respectively.
7. 7. terminal system according to claim 1, it is characterized in that：In the power supply interface module of the master control plate module, electricity The 12V power supplys that source modular converter transmits form input power VIN ends after fuse FUSE1, and input power VIN ends warp can VCC6.5V ends are formed after adjusting the regulation of voltage stabilizing chip LM2596-ADJ chips；VCC6.5V ends are through voltage stabilizing chip REG1117-3.3 cores VDD3.3V ends are formed after piece decompression；VCC6.5V ends form VDD5V after adjustable voltage stabilizing chip LP3856-ADJ chips regulation End；VDD5V ends connect resistance R26 one end, are grounded after resistance R26 other end series resistor R28, the resistance R26 other end 18 pin AD_DCIN ends of STM32F103 chips are also connect as output；VCC6.5V terminates TR5V L-S-Z relay RELAY1 lines One end of circle and diode D2 negative pole, the other end of relay RELAY1 coils and diode D2 positive pole connect NPN jointly Triode Q3 colelctor electrode, triode Q3 emitting stage ground connection, base stage connecting resistance R25 and R27 one end, resistance R25's is another 15 pin JD_5V ends of STM32F103 chips, resistance R27 other end ground connection are terminated, relay RELAY1 movable contact connects VDD5V ends, outwards output VCC5V ends are formed after relay RELAY1 normally opened stationary contact series resistor R21.
8. 8. terminal system according to claim 1, it is characterized in that：Work in the indicating lamp module of the master control plate module Make indicator lamp part, VDD5V ends series resistor R13 is followed by indicator lamp Fault positive pole, and indicator lamp Fault negative pole meets NPN tri- Pole pipe Q1 colelctor electrode, triode Q1 base stage is accessed after 31 pin series resistor R18 of STM32F103 chips, triode Q1's Grounded emitter, if operation irregularity, lighted by MCU module control indicator lamp Fault；VDD5V ends series resistor R14 is followed by referring to Show lamp Run positive pole, indicator lamp Run negative pole connects NPN triode Q2 colelctor electrode, the 32 pin concatenation electricity of STM32F103 chips Triode Q2 base stage is accessed after resistance R19, triode Q2 grounded emitter, if working properly, controlled and indicated by MCU module Lamp Run lights.