CN103634028B - A kind of PLC household electrical appliance communication terminal system - Google Patents

Abstract

The invention discloses a PLC home appliance communication terminal system, which relates to the field of Internet of Things. In the system, the input end of the air switch module is connected to the household power line, and the output end outputs multiple indoor power lines; the indoor power line is connected to household appliances and PLC interfaces; all PLC interfaces are connected to the main control board, and some PLC interfaces are also connected to the PLC The conversion module; the PLC conversion module is used to realize the conversion between the carrier signal and the digital signal; the main control board is used to realize the communication between different PLC conversion modules, and realize the communication between the home network and the external network. The system has the following advantages: Aiming at the attenuation of the carrier signal by the line and air switch, it plays the role of relay; through the PLC conversion module, the data forwarding function between different power lines or different household appliances on the same power line is realized; through the network module The information interaction between the home network and the external network is realized.

Description

A PLC home appliance communication terminal system

technical field

The invention relates to the technical field of the Internet of Things, in particular to a PLC home appliance communication terminal system.

Background technique

PLC (Power Line Communication, power line carrier communication) communication has achieved great success in electric remote meter reading, but it has hardly been applied in PLC home appliances. The main reason is that PLC home appliances have their own characteristics, resulting in inability Use the narrowband PLC scheme used in remote meter reading. The characteristics of PLC home appliances include high transmission speed, high operation stability, moderate transmission distance, etc., and the above characteristics require that when the signal is transmitted, the indoor wiring distance should not be too far or there can be forwarding in the middle Equipment; due to the serious attenuation of the signal by some air switches, when the home appliances are on different phase lines of the air switch, the transmission speed and stability of the signal will be greatly affected, and even cause the home appliances to be abnormal due to abnormal communication. At the same time, the protocols of the carrier signals of different power lines or different home appliances on the same power line are different, resulting in normal communication and limiting the promotion of PLC communication in the field of home appliances.

Contents of the invention

(1) Technical problems to be solved

The technical problem to be solved by the present invention is: how to provide a PLC home appliance communication terminal system to overcome the communication barriers of different power lines or different manufacturers' home appliances on the same power line due to different communication protocols, and the attenuation of carrier signals.

(2) Technical solutions

In order to solve the above technical problems, the present invention provides a PLC home appliance communication terminal system, which includes: a main control board, an air switch module, a PLC interface and a PLC conversion module;

The input end of the air switch module is connected to the household power line, and the output end outputs multiple indoor power lines;

The indoor power line is connected to the household electrical appliance and the PLC interface;

All of the PLC interfaces are connected to the main control board, and some of the PLC interfaces are also connected to the PLC conversion module;

The PLC conversion module is used to realize the conversion between the carrier signal and the digital signal;

The main control board is used to realize the communication between different PLC conversion modules, and realize the communication between the home network and the external network.

Wherein, the system also includes: a network module;

The main control board is connected to the external network through the network module, and the network module is used to realize the communication between the external network and the household appliances, and to set the type of the PLC conversion module through the external network.

Wherein, the network module adopts a single-chip microcomputer and an RJ45 interface.

Wherein, the main control board includes: a data transceiving unit and a protocol analysis unit;

The data transceiving unit is connected to the PLC interface and the network module, and is used to receive data from the PLC interface or the network module and then send it to the protocol analysis unit, and process it through the protocol analysis unit The final data is sent to the corresponding PLC interface or the network module;

The protocol analysis unit is used to analyze the data received by the data transceiving unit to determine the destination forwarding address, and encapsulate the data according to the protocol requirements of the destination forwarding address, and deliver it to the data transceiving unit for forwarding.

Wherein, the system also includes: an interactive module;

The interaction module is connected to the main control board through a cable, and is used for setting the type of the PLC conversion module, displaying the type, quantity and position of the PLC conversion module, and displaying the operating status of the household appliances.

Wherein, the interactive module includes: a keyboard and a display screen;

The keyboard is used to receive user setting instructions to set the type of the PLC conversion module, and to receive user query instructions;

The display screen is used to display the type, quantity and location of the PLC conversion modules according to the query instruction, and to display the running status of the household electrical appliances.

Wherein, the type of the PLC conversion module is determined by the communication protocol and interface type of the PLC conversion module.

Wherein, the main control board further includes: a data storage unit, a key processing unit and a display processing unit;

The data storage unit is used to store the type, quantity and location information of the PLC conversion unit;

The button processing unit is used to modify the type of the PLC conversion module in the data storage unit according to the setting instruction, and send the query instruction to the display processing unit;

The display processing unit is configured to extract the type, quantity and location information of the corresponding PLC conversion module from the data storage unit according to the query instruction and send it to the display screen.

Wherein, the digital signal is a UART signal or an SPI signal.

Wherein, at least one of the PLC interfaces is used to supply power to the main control board.

(3) Beneficial effects

The PLC home appliance communication terminal system of the present invention has the following advantages: through the PLC conversion module, the data forwarding function between different power lines or different manufacturers’ home appliances on the same power line is realized, and the differences caused by differences in communication protocols and modulation modes are overcome. The problem of communication barriers between the home appliances of the manufacturer; for the attenuation of the carrier signal by the line and the air switch, it plays the role of a relay; the information interaction between the home network and the external network is realized through the network module; the PLC conversion module adopts The unified interface can be plugged into any PLC interface, which is flexible and convenient; the air switch module is integrated with the main control board, which makes the installation and use of the user more convenient and saves space.

Description of drawings

Fig. 1 is a schematic diagram of the module structure of the PLC home appliance communication terminal system according to the embodiment of the present invention;

Fig. 2 is a schematic diagram of the module structure of the main control board.

Detailed ways

The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

Fig. 1 is a schematic diagram of the module structure of the PLC home appliance communication terminal system according to the embodiment of the present invention. board 500 and network module 600.

The household power line (live line L and neutral line N in the figure) is connected to the input end of the air switch module 100, and then multiple indoor power lines are output from the output end of the air switch module 100 (live line L1, neutral line N1 in the figure; live line L2, Neutral line N2; live line L3, neutral line N3). The indoor power lines are connected to home appliances, such as computers, televisions, air conditioners, etc.; meanwhile, the indoor power lines are connected to a PLC interface 300 respectively. The PLC interfaces 300 are all connected to the main control board 500 , and some of the PLC interfaces 300 are also connected to one of the PLC conversion modules 200 . The main control board 500 is also connected to the interaction module 400 and a network module 600, and the network module 600 is connected to an external network (ie, the Internet or other home networks).

The PLC conversion module 200 is used to realize the conversion between the carrier signal and the digital signal. The main control board 500 is used to implement communication between different PLC conversion modules 200 , and as shown in FIG. 2 , the main control board further includes a data transceiving unit 550 and a protocol analysis unit 540 .

Specifically, assuming that the first home appliance (such as a computer) on L1 needs to communicate with the second home appliance (such as an air conditioner) on L3, and the carrier communication protocols on L1 and L3 are different, the first home appliance sends The first PLC interface that the first carrier signal is connected to L1, the PLC interface sends the first carrier signal to the first PLC conversion module connected to it; the first PLC conversion module converts the first carrier signal into the first digital signal, Then the first digital signal is sent to the data transceiver unit 550 of the main control board 500 by the first PLC interface; the data transceiver unit 550 sends the first digital signal to the protocol analysis unit 540, and the protocol analysis unit 540 analyzes the first digital signal , to determine the destination forwarding address, and encapsulate the data according to the protocol requirements of the destination forwarding address to obtain the second digital signal and hand it over to the data transceiver unit 550; the data transceiver unit 550 sends the second digital signal to the second PLC interface connected to L3, The second PLC interface sends the second digital signal to the second PLC conversion module connected thereto; the second PLC conversion module converts the second digital signal into a second carrier signal, and then converts the second carrier signal through the second PLC interface and L3 The signal is sent to the second home appliance, and the communication between the home appliances is completed so far. Wherein, the first digital signal and the second digital signal are UART (Universal Asynchronous Receiver/Transmitter, Universal Asynchronous Receiver/Transmitter) signal or SPI (Serial Peripheral interface, Serial Peripheral Interface) signal, which signal is specifically converted into It is determined by the type of PLC conversion module. Generally, when the data transmission rate is less than 11K, the UART signal is used, and when the data transmission rate is greater than 11K, the SPI signal is used.

In addition, when different home appliances on the same indoor power line need to communicate, such as computers and TVs on L1, and the two use different carrier communication protocols, the two also need the above-mentioned similar conversion to complete the communication process. L1 can be connected to two PLC interfaces 300, and the two PLC interfaces 300 are respectively connected to a PLC conversion module 200, and then the above-mentioned similar communication process is completed.

Wherein, the PLC conversion module 200 adopts a unified interface setting, which can be plugged into any corresponding PLC interface 300 when needed, and unplugged from the corresponding PLC interface 300 when not needed. Therefore, when the household appliances on a certain indoor power line do not need to communicate, the corresponding PLC conversion module 200 can be unplugged to be applied to other PLC interfaces 300 .

Home appliances of different manufacturers may use different carrier modules (corresponding to different communication protocols, modulation methods, etc.), making it difficult to communicate with each other normally. By setting the PLC conversion module 200, the above problems can be effectively overcome and all home appliances can be guaranteed Data communication between devices can be carried out normally.

In addition, at least one PLC interface 300 supplies power to the main control board 500 through the connected indoor power line, and then the main control board 500 supplies power to the interaction module 300 and the network module 600 .

The network module 600 includes a single-chip microcomputer, an RJ45 (Registered Jack 45) interface and related circuits, which are used to realize the communication between the external network and the home appliance, and set the type of the PLC conversion module through the external network, and set the connection to the terminal system Related parameters of home appliances (including communication protocols, correspondence between home appliances and protocols, etc.), etc.

Specifically, when the RJ45 interface receives network data from the external network, it sends it to the data transceiver unit 550 of the main control board 500, and the data transceiver unit 550 sends the network data to the protocol analysis unit 540; the protocol analysis unit 540 analyzes Network data, and judge whether the incoming network data is a setting message sent to the terminal system or a message to be sent to home appliances. When it is a setting message, store the network data, and modify and set the corresponding parameters according to the network data ; When the message is data sent to the home appliance, the protocol analysis unit 540 repackages the network data and sends it to the corresponding PLC conversion module 200, and the PLC conversion module 200 repackages the data and sends it to the corresponding home appliance. The process of home appliances feeding back data to the external network is the inverse process of the above process, and will not be repeated here.

The interaction module 400 includes: a keyboard and a display screen. The keyboard is used to receive user setting instructions to set the type of the PLC conversion module 200, and to receive user query instructions. The display screen is used for displaying the type, quantity and location of the PLC conversion modules 200 according to the query instruction, and displaying the running status of the household appliances. The type of the PLC conversion module 200 is determined by the communication protocol and interface type of the PLC conversion module 200 , that is, different types of the PLC conversion module 200 correspond to different communication protocols and interface (UART or SPI) types. As shown in FIG. 2 , in order to communicate with the interaction module 400 , the main control board 500 further includes: a data storage unit 530 , a key processing unit 510 and a display processing unit 520 . The data storage unit 530 is used for storing the type, quantity and location information of the PLC conversion module 200 . The key processing unit 510 is configured to modify the type of the PLC conversion module 200 in the data storage unit 530 according to the setting instruction, and send the query instruction to the display processing unit 520 . The display processing unit 520 is configured to extract the type, quantity and location information of the corresponding PLC conversion modules 200 from the data storage unit 530 according to the query instruction and send them to the display screen. Wherein, both the button processing unit 510 and the display processing unit 520 are connected to the interaction module 400 through a cable, so as to supply power to the interaction module 400 and perform information interaction at the same time.

Specifically, the user can input setting instructions to the key processing unit 510 through the keyboard, and the key processing unit 510 modifies the type of the PLC conversion module 200 in the data storage unit 530 according to the setting instruction, and each PLC conversion module 200 stores the data according to the data storage unit 530. The information stored in unit 530 sets its own type. The user can also enter query commands through the keyboard, such as querying the type and location of the corresponding PLC conversion module 200 (the number of the PLC interface it is connected to), and the number of all online PLC conversion modules 200, or the operating status of the corresponding household appliances. The key processing unit 510 first receives the query instruction, and then forwards it to the display processing unit 520, and the display processing unit 520 extracts the type, quantity and location information of the corresponding PLC conversion module 200 from the data storage unit 530 according to the query instruction , or read the operating status information of the corresponding household electrical equipment through the indoor power line, and then send it to the display screen, and the display screen displays the corresponding information to the user. In a default state, the display screen can display the quantity of all online PLC conversion modules 200 and the numbers of the PLC interfaces 300 corresponding to all online PLC conversion modules 200. When the user inputs a query command, the queried information can be displayed.

The PLC home appliance communication terminal system described in the embodiment of the present invention has the following advantages: the data forwarding function between different power lines or different home appliances on the same power line is realized through the PLC conversion module, and the problems caused by differences in communication protocols and modulation modes are overcome. Communication barriers between home appliances of different manufacturers; Aiming at the attenuation of carrier signals by lines and air switches, data exchange between different phase power lines, etc., it plays the role of relay; through the network module, the connection between the home network and the external network is realized. information interaction; the PLC conversion module adopts a unified interface and can be plugged into any PLC interface, which is flexible and convenient; the air switch module is integrated with the main control board to make installation and use more convenient for users and save space.

The above embodiments are only used to illustrate the present invention, but not to limit the present invention. Those of ordinary skill in the relevant technical field can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, all Equivalent technical solutions also belong to the category of the present invention, and the scope of patent protection of the present invention should be defined by the claims.

Claims (8)

1. A PLC home appliance communication terminal system, characterized in that it comprises: a main control board, an air switch module, a PLC interface and a PLC conversion module; The input end of the air switch module is connected to the household power line, and the output end outputs multiple indoor power lines; The indoor power line is connected to the household electrical appliance and the PLC interface; All of the PLC interfaces are connected to the main control board, and some of the PLC interfaces are also connected to the PLC conversion module; The PLC conversion module is used to realize the conversion between the carrier signal and the digital signal, and the PLC conversion module adopts a unified interface setting; The main control board is used to realize the communication between different PLC conversion modules, and realize the communication between the home network and the external network, The system also includes: a network module; The main control board is connected to the external network through the network module, and the network module is used to realize the communication between the external network and the household appliances, and set the type of the PLC conversion module through the external network; Data transceiver unit and protocol analysis unit, The data transceiving unit is connected to the PLC interface and the network module, and is used to receive data from the PLC interface or the network module and then send it to the protocol analysis unit, and process it through the protocol analysis unit The final data is sent to the corresponding PLC interface or the network module; The protocol analysis unit is configured to analyze the data received by the data transceiving unit to determine the destination forwarding address, and encapsulate the data according to the protocol requirements of the destination forwarding address and hand it over to the data transceiving unit for forwarding, The protocol analysis unit analyzes the network data, and judges whether the incoming network data is a setting message sent to the terminal system or a message to be sent to the home appliance device. When it is a setting message, store the network data, and Modify and set the corresponding parameters; when the message is data sent to the home appliance, the protocol analysis unit repackages the network data and sends it to the corresponding PLC conversion module, and the PLC conversion module repackages the data and sends it to the corresponding home appliance. 2. The system according to claim 1, wherein the network module adopts a single-chip microcomputer and an RJ45 interface. 3. The system according to claim 1, further comprising: an interactive module; The interaction module is connected to the main control board through a cable, and is used to set the type of the PLC conversion module, display the type, quantity and position of the PLC conversion module, and display the operating status of the household appliances. 4. The system according to claim 3, wherein the interactive module comprises: a keyboard and a display screen; The keyboard is used to receive user setting instructions to set the type of the PLC conversion module, and to receive user query instructions; The display screen is used to display the type, quantity and location of the PLC conversion modules according to the query instruction, and to display the running status of the household electrical appliances. 5. The system according to claim 4, wherein the type of the PLC conversion module is determined by the communication protocol and interface type of the PLC conversion module. 6. The system according to claim 4, wherein the main control board further comprises: a data storage unit, a key processing unit and a display processing unit; The data storage unit is used to store the type, quantity and location information of the PLC conversion unit; The button processing unit is used to modify the type of the PLC conversion module in the data storage unit according to the setting instruction, and send the query instruction to the display processing unit; The display processing unit is configured to extract the type, quantity and location information of the corresponding PLC conversion module from the data storage unit according to the query instruction and send it to the display screen. 7. The system according to claim 1, wherein the digital signal is a UART signal or an SPI signal. 8. The system according to claim 1, wherein at least one of the PLC interfaces is used to supply power to the main control board.