CN110176948A - LoRa+PLC bimodulus built-in module and the communication structure and the means of communication for using the module - Google Patents

Abstract

The invention discloses a LoRa+PLC dual-mode built-in module, including an MCU, an HPLC broadband carrier chip, a LoRa radio frequency module, an LED indicator light, a carrier signal coupling part and a charging circuit part, and the LoRa radio frequency module is used for sending and receiving LoRa data, The HPLC broadband carrier chip is used to switch the PLC to send and receive LoRa data in places where LoRa communication cannot reach, the LED indicator is used to indicate the operating status of each module, and the carrier signal coupling part is used to couple the carrier signal to the power line for charging. The circuit section is used for power management and short circuit protection. The present invention adopts two channels of PLC and LoRa to collect and return the data to ensure that most of them can be reported through LoRa wireless communication, while dead angles and blind areas are transmitted through PLC, so that the data can be transmitted farther and more stably to the gateway , making remote meter reading more convenient.

Description

LoRa+PLC dual-mode built-in module and the communication structure and communication method using the module

technical field

The invention belongs to the communication field, and in particular relates to a LoRa+PLC dual-mode built-in module and a communication structure and a communication method using the module.

Background technique

With the continuous deepening of my country's power industry system reform, the original meter reading method of manual meter reading and statistical settlement obviously cannot meet the needs of market commercial operation. Therefore, an automation-based electric energy metering and billing automation system must be established to improve the accuracy, reliability, and timeliness of electric energy collection, transmission, and processing.

With the continuous advancement of microelectronics technology, many communication methods have been applied to energy meter communication. Currently, the mainstream built-in module communication methods on the market include: LoRa, power line carrier (hereinafter referred to as PLC), and micropower wireless communication. These communications are more or less lacking:

(1) Micro-power wireless: low power, limited sensitivity, small coverage, short communication distance, and is seriously affected by obstacles.

(2) PLC: In the case of small power grid fluctuations and short-distance line transmission, PLC carrier technology can be used to transmit meter reading data through wires, but it is not conducive to long-distance information collection and areas with large fluctuations in power loads.

(3) LoRa: LoRa wireless network can cover a large outdoor area and some indoor parts, but there are still blind spots in the dead corners of buildings or basements, such as underground, closed spaces, dead corners in buildings, etc., and the signal penetration is not good.

Contents of the invention

In order to solve the defects and deficiencies in the above-mentioned prior art, the present invention provides two channels of PLC and LoRa using LoRa+PLC dual-mode built-in modules to collect and return data to ensure that most of them can pass LoRa wireless Communication reporting, and dead angles and blind areas are transmitted through PLC, which makes up for the shortcomings of the two communication methods, and can transmit data to the gateway farther and more stably, making remote meter reading more convenient. LoRa+PLC dual mode A built-in module, a communication structure and a communication method using the module.

Technical scheme of the present invention: a kind of LoRa+PLC dual-mode built-in module, comprises MCU, the HPLC broadband carrier chip that is connected on the MCU, LoRa radio frequency module and LED indicator light and the carrier signal coupling part that is connected on the HPLC broadband carrier chip and In the charging circuit part, the LoRa radio frequency module is used to send and receive LoRa data, the HPLC broadband carrier chip is used to switch PLC to send and receive LoRa data where LoRa communication cannot reach, and the LED indicators are used for each Indication of the operating state of the module, the carrier signal coupling part is used to couple the carrier signal to the power line, and the charging circuit part is used for power management and short circuit protection.

Preferably, the HPLC broadband carrier chip is connected to the MCU through SPI, the LoRa radio frequency module is connected to the MCU through SPI, and the LED indicator is connected to the MCU through GPIO.

A communication structure using LoRa+PLC dual-mode built-in modules, including a metering master station, a server connected to the metering master station, a LoRa+PLC gateway and concentrator connected to the server, and a LoRa+PLC gateway and concentrator connected The PLC power line on the network, the LoRa wireless communication WAN self-organized network on the LoRa+PLC gateway, and the electric energy meter that communicates through the PLC power line and the LoRa wireless communication wide area network. The internal installation of the LoRa+PLC dual-mode built-in module of the electric energy meter.

Preferably, the server is connected to the metering master station through Internete data transparent transmission, the concentrator is connected to the server through 4G, the LoRa+PLC gateway is connected to the server through 4G or Internete, and the core network or HES system is deployed on the server.

Preferably, the overall network architecture of electric meter reading using this communication structure includes multiple electric energy meters, and the electric energy meters transmit data to the upper layer through the PLC and LoRa channels of the LoRa+PLC dual-mode built-in module, and use the PLC channel to send data When using the LoRa channel, the data can be transmitted to the concentrator or the LoRa+PLC gateway with the PLC carrier module. When the LoRa channel is used to send data, the data is transmitted to the LoRa+PLC gateway, and then the data of the two channels are aggregated to the core network or HES system, and finally flow to Metering master station or other application platforms.

A communication method using the communication structure of the LoRa+PLC dual-mode built-in module, characterized in that:

1) Data downlink process

The LoRa+PLC dual-mode built-in module receives the data from the gateway, judges the weight, decrypts the data, performs protocol judgment and protocol packaging on the read data, and forms a standard DL\T645 message, and the data is directly transmitted to the energy meter through the serial port superior;

2) Data uplink process

The LoRa+PLC dual-mode built-in module communicates with the meter through the serial data bus. After reading the data on the serial bus, it will make a protocol judgment, collect the read data, and frame according to the LoRaWAN protocol. The main board chip will be ready to send The LoRa or FSK data is transmitted to the LoRa radio frequency module through SPI, and the data is sent to the gateway through the radio frequency module; at the same time, the read data is framed according to the carrier protocol, and sent to the HPLC broadband carrier module through SPI, and then through the power line using PLC technology Report the collected data to a concentrator or a gateway with an HPLC carrier module; both channels simultaneously send data up to the gateway or concentrator.

The present invention adopts the PLC and LoRa two channels of the LoRa+PLC dual-mode built-in module to collect and return the data to ensure that most of them can be reported through LoRa wireless communication, and the dead angles and blind areas are transmitted through the PLC, making up for the two According to the respective shortcomings of the two communication methods, the data can be transmitted to the gateway farther and more stably, making remote meter reading more convenient.

Description of drawings

Fig. 1 is the hardware connection schematic diagram of LoRa+PLC dual-mode built-in module among the present invention;

Fig. 2 is the schematic diagram of the communication structure using LoRa+PLC dual-mode built-in module in the present invention;

Fig. 3 is the overall network architecture diagram of the electric meter reading using LoRa+PLC dual-mode built-in module in the present invention;

Fig. 4 is a schematic diagram of the comparison between the LoRa+PLC dual-channel communication technology in the present invention and several other existing communication technologies.

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings, but it is not intended to limit the protection scope of the present invention.

As shown in Figure 1, a LoRa+PLC dual-mode built-in module includes an MCU, an HPLC broadband carrier chip connected to the MCU, a LoRa radio frequency module and LED indicators, and a carrier signal coupling part connected to the HPLC broadband carrier chip and In the charging circuit part, the LoRa radio frequency module is used to send and receive LoRa data, the HPLC broadband carrier chip is used to switch PLC to send and receive LoRa data where LoRa communication cannot reach, and the LED indicators are used for each Indication of the operating state of the module, the carrier signal coupling part is used to couple the carrier signal to the power line, and the charging circuit part is used for power management and short circuit protection. The HPLC broadband carrier chip is connected to the MCU through SPI, the LoRa radio frequency module is connected to the MCU through SPI, and the LED indicator is connected to the MCU through GPIO.

As shown in Figures 2 and 3, a communication structure using LoRa+PLC dual-mode built-in modules, including a metering master station, a server connected to the metering master station, a LoRa+PLC gateway and concentrator connected to the server, and a connection The PLC power line on the LoRa+PLC gateway and the concentrator, the LoRa wireless communication WAN on the LoRa+PLC gateway ad hoc network, and the energy meter communicating through the PLC power line and the LoRa wireless communication WAN mode. LoRa is installed inside the energy meter +PLC dual-mode built-in module. The server is connected to the metering master station through Internet data transparent transmission, the concentrator is connected to the server through 4G, the LoRa+PLC gateway is connected to the server through 4G or Internet, and the core network or HES system is deployed on the server. The overall network architecture of electric meter reading using this communication structure includes multiple electric energy meters. The electric energy meters transmit data to the upper layer through the PLC and LoRa channels of the LoRa+PLC dual-mode built-in module. When using the PLC channel to send data, the data It can be transmitted to a concentrator or a LoRa+PLC gateway with a PLC carrier module. When using the LoRa channel to send data, the data is transmitted to the LoRa+PLC gateway, and then the data of the two channels are aggregated to the core network or HES system, and finally flow to the metering master station or other application platforms.

A communication method using the communication structure of the LoRa+PLC dual-mode built-in module, characterized in that:

1) Data downlink process

The LoRa+PLC dual-mode built-in module receives the data from the gateway, judges the weight, decrypts the data, performs protocol judgment and protocol packaging on the read data, and forms a standard DL\T645 message, and the data is directly transmitted to the energy meter through the serial port superior;

2) Data uplink process

The LoRa+PLC dual-mode built-in module communicates with the meter through the serial data bus. After reading the data on the serial bus, it will make a protocol judgment, collect the read data, and frame according to the LoRaWAN protocol. The main board chip will be ready to send The LoRa or FSK data is transmitted to the LoRa radio frequency module through SPI, and the data is sent to the gateway through the radio frequency module; at the same time, the read data is framed according to the carrier protocol, and sent to the HPLC broadband carrier module through SPI, and then through the power line using PLC technology Report the collected data to a concentrator or a gateway with an HPLC carrier module; both channels simultaneously send data up to the gateway or concentrator.

As shown in Figure 4, LoRaWAN (LoRa Wireless Communication Wide Area Network) in the present invention is a low-power wide-area network specification released by the LoRa Alliance in order to solve the connection requirements of more and more long-distance Internet of Things devices. Compared with traditional wireless technologies, it has : The characteristics of low bandwidth, low power consumption, low cost, long distance, high sensitivity and large capacity, the star topology of LoRaWAN determines that the network deployment is relatively simple and convenient; In such a blind area, communication is still not possible. At this time, PLC technology is used to transmit the energy meter data in the blind area that LoRa wireless communication cannot reach to the gateway and concentrator. The LoRa+PLC dual-mode built-in module can switch between two channels to send and receive data, which makes up for the respective shortcomings of the two communication methods, and can transmit data to the gateway farther and more stably, making remote meter reading more convenient.

Claims (6)

1. A LoRa+PLC dual-mode built-in module is characterized in that: it comprises MCU, the HPLC broadband carrier chip that is connected on the MCU, the LoRa radio frequency module and LED indicator light and the carrier signal coupling part that is connected on the HPLC broadband carrier chip And the charging circuit part, the LoRa radio frequency module is used to send and receive LoRa data, the HPLC broadband carrier chip is used to switch PLC to send and receive LoRa data in places where LoRa communication cannot reach, and the LED indicator light is used for Indication of the operating status of each module, the carrier signal coupling part is used to couple the carrier signal to the power line, and the charging circuit part is used for power management and short circuit protection. 2. a kind of LoRa+PLC dual-mode built-in module according to claim 1, is characterized in that: described HPLC broadband carrier chip is connected with MCU by SPI, and described LoRa radio frequency module is connected with MCU by SPI, and described LED indication The light is connected to the MCU through GPIO. 3. a communication structure that uses the LoRa+PLC dual-mode built-in module described in claim 2, is characterized in that: it comprises metering master station, the server that is connected on the metering master station, the LoRa+PLC gateway that is connected on the server And the concentrator, the PLC power line connected to the LoRa+PLC gateway and the concentrator, the LoRa wireless communication wide area network of the self-organized network on the LoRa+PLC gateway, and the electric energy meter communicating through the PLC power line and the LoRa wireless communication wide area network. The inside of the meter is equipped with a LoRa+PLC dual-mode built-in module. 4. A kind of communication structure that uses LoRa+PLC dual-mode built-in module according to claim 3, it is characterized in that: described server connects metering main station through Internete data transparent transmission, and described concentrator connects server by 4G, so The LoRa+PLC gateway is connected to the server through 4G or Internet, and the core network or HES system is deployed on the server. 5. A communication structure using LoRa+PLC dual-mode built-in modules according to claim 4, characterized in that: the overall network architecture of electric meter reading using the communication structure includes a plurality of electric energy meters, and the electric energy meters pass through LoRa+ The PLC and LoRa two channels of the PLC dual-mode built-in module transmit data to the upper layer. When using the PLC channel to send data, the data can be transmitted to the concentrator or the LoRa+PLC gateway with the PLC carrier module. When using the LoRa channel to send data , the data is transmitted to the LoRa+PLC gateway, and then the two channel data are aggregated to the core network or HES system, and finally flow to the metering master station or other application platforms. 6. A communication method of the communication structure as claimed in claim 4, characterized in that: 1) Data downlink process The LoRa+PLC dual-mode built-in module receives the data from the gateway, judges the weight, decrypts the data, performs protocol judgment and protocol packaging on the read data, and forms a standard DL\T645 message, and the data is directly transmitted to the energy meter through the serial port superior; 2) Data uplink process The LoRa+PLC dual-mode built-in module communicates with the meter through the serial data bus. After reading the data on the serial bus, it will make a protocol judgment, collect the read data, and frame according to the LoRaWAN protocol. The main board chip will be ready to send The LoRa or FSK data is transmitted to the LoRa radio frequency module through SPI, and the data is sent to the gateway through the radio frequency module; at the same time, the read data is framed according to the carrier protocol, and sent to the HPLC broadband carrier module through SPI, and then through the power line using PLC technology Report the collected data to a concentrator or a gateway with an HPLC carrier module; both channels simultaneously send data up to the gateway or concentrator.