Intelligent electric meter and intelligent electric meter multi-protocol processing method

Abstract

The invention belongs to the technical field of electric energy meters, and particularly relates to an intelligent electric meter and an intelligent electric meter multi-protocol processing method. The method comprises the following steps: extracting a data packet received by an electric energy meter according to each communication protocol frame format to obtain a frame message under each communication protocol; each frame of message under each extracted communication protocol is sent to a corresponding data routing module through a corresponding communication protocol transmission link, and the data routing module is used for interacting with a communication module and a service module and comprises a data format conversion unit; the data routing module corresponding to each communication protocol determines the name of a data item according to the mapping relation corresponding to the protocol message, and the data format conversion unit performs format conversion on the data content corresponding to the protocol message data item received by the electric energy meter or the data content corresponding to the data item returned by the service module; data processing of each frame of message under each protocol is completed, and the problem that the issued protocol message is lost under a multi-frame concurrent scene is solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of electric energy meters, and particularly relates to an intelligent electric energy meter and a multi-protocol processing method for an intelligent electric energy meter. Background Art

[0002] With the development of informatization and intellectualization, as an electricity metering device at the metering point of the power system, the communication function of the electric energy meter has become more and more complex, and the types of communication protocols applied by the electric energy meter have also become more and more. The communication protocol has developed from the original DL / T645 protocol to the current DL / T698 protocol, DLMS / COSEM protocol, etc. The protocol function is more extensive and the implementation is more complex. In order to take into account the old acquisition devices, in some places, it is required that the electric energy meter supports the coexistence of multiple communication protocols. However, since the data formats of different communication protocols are different, the electric energy meter needs to convert the data format for different protocols. For data items existing in multiple protocols, such as voltage, the DL / T645 protocol requires a length of 2 bytes (BCD format), while the DL / T698 protocol requires a length of 3 bytes (hexadecimal format). The coexistence of multiple protocols makes the data and frame recognition of the electric energy meter complex and difficult to process, and the software code of the electric energy meter is complex. Currently, the electric energy meter supporting the coexistence of multiple protocols is only applicable to single-window data recognition, that is, it can only process single-frame message data and does not support the multi-window mode. When several devices of different protocol types send messages to the electric energy meter at the same time, that is, in the multi-frame concurrent scenario, the electric energy meter can only process one frame of message, and subsequent frames are often discarded. For example, when there is a concurrent situation of a DL / T645 protocol frame and a DL / T698 protocol frame, the electric energy meter only processes the DL / T645 protocol frame, and the subsequent DL / T698 protocol frame will be discarded, making the electric energy meter supporting multiple protocols unable to be applied in the complex multi-frame concurrent scenario, the application scenario of the electric energy meter is limited, and the degree of intellectualization is low.

[0003] Moreover, the names of various data items stored inside the standard electric energy meter supporting multiple protocols are defined by the 4-byte data identifier of the DL / T645 protocol, resulting in that other types of protocols need to be corresponded with the data identifier of the DL / T645 protocol before processing. For example, for the data access of the DL / T698 protocol, a data table needs to be created to correspond the OAD (Object Oriented Access Protocol) of the DL / T698 data with the data identifier of the DL / T645 protocol, and for data items that do not exist in the DL / T645 protocol, extensions are made to complete the storage access of the DL / T698 protocol data. This method causes the data to be too tightly bound to the DL / T645 protocol, with low data independence, making the degree of intellectualization of the electric energy meter low, and when multiple protocols coexist, it is also easy to cause the code to be complex and difficult to understand, which is not conducive to development and maintenance. Summary of the Invention

[0004] The object of the present invention is to provide an intelligent electric meter and an intelligent electric meter multi - protocol processing method, so as to solve the problem that existing electric energy meters are prone to discard messages during multi - frame concurrency, resulting in a relatively low level of intelligence for multi - protocol electric meters.

[0005] The present invention provides an intelligent electric meter multi - protocol processing method to solve the above - mentioned technical problems, including: Extract the data packets received by the electric energy meter according to the frame formats of each communication protocol to obtain frame messages under each communication protocol; Send each frame message extracted under each communication protocol to the corresponding data routing module through the corresponding communication protocol transmission link. The data routing module is used to interact with the communication module and the service module, and includes a data format conversion unit. The data routing module corresponding to each communication protocol determines the data item name according to the mapping relationship corresponding to the protocol message. The data format conversion unit performs format conversion on the data content corresponding to the data item of the protocol message received by the electric energy meter or the data content corresponding to the data item returned by the service module, and completes the data processing of each frame message under each protocol.

[0006] Further, the process of extracting according to the frame formats of each communication protocol is as follows: Set the communication protocol extraction order, extract the messages conforming to the first communication protocol frame format from the data packet according to the first communication protocol frame format, and form the remaining messages into a new data packet; Extract the messages conforming to the second communication protocol frame format from the new data packet according to the second communication protocol frame format; Extract each frame message conforming to other communication protocols in sequence according to the above method.

[0007] Further, the process of extracting the message conforming to a corresponding communication protocol frame format from the data packet is as follows: Extract the first - frame communication protocol message from the data packet according to the frame format of the communication protocol, then re - form the data after the frame tail and before the frame head of this frame protocol message into a new data packet, and extract the second - frame communication protocol message from the new data packet according to the frame format of the communication protocol, and so on in a loop until all the messages conforming to the communication protocol in the data packet are extracted.

[0008] Further, each communication protocol frame format includes a protocol frame start byte, an end byte, a protocol category byte, a total data length field for transmission, and a frame check byte.

[0009] Further, the process of determining the data item name according to the mapping relationship corresponding to the protocol message is as follows: Determine the corresponding data item name in the data mapping table in the data routing module corresponding to the communication protocol according to the data identifier in the extracted protocol message; The data mapping table stores the corresponding relationship between all data identifiers and data item names under this communication protocol type, and a corresponding data mapping table is set in the data routing module corresponding to each communication protocol.

[0010] Further, interacting with the service module includes performing a reading operation on the service module. The process of the reading operation is as follows: Route the data item names in the protocol message to the service module. The service module returns the data content of the corresponding data items to the data routing module. The data format conversion unit in the data routing module performs data format conversion on the data content returned by the service module and then uploads it.

[0011] Further, interacting with the service module includes performing a setting operation on the service module. The process of the setting operation is as follows: The data format conversion unit in the data routing module performs data format conversion on the data content corresponding to the data items in the protocol message received by the electricity meter, routes the data item names and the data content after format conversion to the service module, and the service module sets the data items according to the received data content.

[0012] The beneficial effects of the above technical solution are as follows: The present invention is an improved invention. For the multi-frame concurrent scenario, it receives data packets including different multi-frame protocol messages, extracts each frame of protocol message from the data packet according to each communication protocol frame format. Each protocol has a corresponding data routing module. It uses the link identification method to transmit each frame of message under each protocol to the corresponding data routing module of each protocol through the corresponding link for processing, determines the data item names in the protocol message according to the mapping relationship, and performs format conversion on the data content of the corresponding protocol, completing the processing of the service function data of each frame of message under each protocol. It solves the problem of losing the sent protocol messages in the multi-frame concurrent scenario, realizes data processing in the multi-frame concurrent mode of different protocol types, and improves the intelligence level of the electricity meter.

[0013] To solve the above technical problems, the present invention also provides an intelligent electricity meter, which includes a communication module and also includes a data routing module. The communication module is used to extract the data packets received by the electricity meter according to each communication protocol frame format to obtain the frame messages under each communication protocol, and send each frame of message under each communication protocol extracted through the corresponding communication protocol transmission link to the corresponding data routing module; the data routing module is used to interact with the communication module and the service module, and includes a data format conversion unit. The data format conversion unit is used to perform format conversion on the data content corresponding to the data items in the protocol message received by the electricity meter or the data content corresponding to the data items returned by the service module after the data routing module determines the data item names according to the mapping relationship corresponding to the protocol message, and complete the data processing of each frame of message under each protocol.

[0014] Further, the process of the communication module extracting according to each communication protocol frame format is as follows: Set the communication protocol extraction order, extract the messages in the data packet that conform to the first communication protocol frame format according to the first communication protocol frame format, and form the remaining messages into a new data packet; Extract the messages in the new data packet that conform to the second communication protocol frame format according to the second communication protocol frame format; Extract each frame of messages conforming to other communication protocols in sequence according to the above method.

[0015] Further, the data routing module further includes a data mapping table, which stores the corresponding relationship between all data identifiers and data item names under this communication protocol type, and is used to determine the corresponding data item name in the data mapping table of the data routing module of the corresponding communication protocol according to the data identifier in the protocol message.

[0016] The beneficial effects of the above technical solution are as follows: The present invention is an improved invention. For the multi-frame concurrent scenario, it receives a data packet including different multi-frame protocol messages, extracts each frame of protocol messages from the data packet according to each communication protocol frame format. Each protocol will have a corresponding data routing module. The link recognition method is used to transmit each frame of messages under each protocol to the corresponding data routing module of each protocol for processing according to the corresponding link, determine the data item name in the protocol message according to the mapping relationship, and perform format conversion on the data content of the corresponding protocol, completing the processing of the service function data of each frame of messages under each protocol, solving the problem of losing the issued protocol messages in the multi-frame concurrent scenario, realizing data processing in the multi-frame concurrent mode of different protocol types, and improving the intelligence level of the electric energy meter. Description of the Drawings

[0017] Figure 1 is the software system framework diagram of the intelligent electric energy meter according to the embodiment of the present invention; Figure 2 is the multi-protocol processing flow chart of the intelligent electric energy meter according to the embodiment of the present invention; Figure 3 is the read data processing flow chart of the data routing module according to the embodiment of the present invention; Figure 4 is the set data processing flow chart of the data routing module according to the embodiment of the present invention. Detailed Embodiment

[0018] In order to make the purpose, technical solution and advantages of the present invention clearer, the specific embodiments of the present invention will be further described below with reference to the drawings.

[0019] The concept of the present invention lies in: extracting each protocol frame message of multi-frame concurrency. Each communication protocol will have a corresponding data routing module. Each frame message of each protocol is sent to the data routing module corresponding to the communication protocol through the corresponding transmission link for processing, solving the problem of lost protocol messages in the multi-frame concurrency scenario, realizing data processing in the multi-frame concurrency mode of different protocol types, and improving the intelligence level of the electric energy meter.

[0020] Embodiment of intelligent electric energy meter The present invention provides an intelligent electric energy meter, which supports coexistence of multiple communication protocols, such as DL / T645 protocol, DL / T698 protocol, and DLMS / COSEM protocol, etc. As Figure 1 shown, the intelligent electric energy meter includes a communication module and a data routing module. Among them: 1. Communication module.

[0021] The communication module is mainly responsible for receiving underlying communication data, multi-frame concurrency processing, and sending and processing of service data frames. The multi-frame concurrency processing of the communication module of the intelligent electric energy meter includes: in the multi-frame concurrency scenario, after receiving the underlying multi-frame protocol messages, extracting the data packets received by the electric energy meter according to the frame formats of each communication protocol to obtain the frame messages under each communication protocol, and sending each frame message under each extracted communication protocol to the corresponding data routing module through the corresponding communication protocol transmission link. The frame format includes a protocol frame start byte, an end byte, a protocol category byte, a total data length field to be transmitted, and a frame check byte. When the data conforms to the frame format of the corresponding protocol, the corresponding data frame is extracted.

[0022] In one embodiment, each frame message under each communication protocol is extracted by using a rolling processing method. The extraction process is as follows: setting the communication protocol extraction order, extracting the message conforming to the first communication protocol frame format from the data packet according to the first communication protocol frame format, and forming the remaining messages into a new data packet; extracting the message conforming to the second communication protocol frame format from the new data packet according to the second communication protocol frame format; extracting each frame message conforming to other communication protocols in sequence according to the above method. Among them, for any communication protocol message, the first frame of the communication protocol message is extracted from the data packet according to the frame format of the communication protocol, and then the data after the frame tail and the data before the frame head of the frame protocol message are re-formed into a new data packet, and the second frame of the communication protocol message is extracted from the new data packet according to the frame format of the communication protocol, and so on until all the messages conforming to the communication protocol in the data packet are extracted. When extracting, start the protocol format check from the head byte position of the data packet, check to the tail byte of the data packet, and extract the bytes conforming to the protocol frame format. The extracted data frame may be at the start byte position of the data packet, may also be at the middle byte position, or at the tail position of the data packet.

[0023] For example, asFigure 2 As shown, the DL / T698 protocol is set as the first communication protocol and the DL / T645 protocol is set as the second communication protocol. After receiving a data packet including DL / T645 protocol messages and DL / T698 protocol messages, first call the frame format check interface function of the DL / T698 protocol to check the frame format of the data packet, and determine whether it conforms to the DL / T698 protocol. If so, the data cursor points to the start position (frame header) of the protocol in the data packet, calculates the frame length of the protocol, determines the frame tail position of the protocol, extracts this segment of data, and performs frame processing of the protocol to obtain a complete frame of data. The data after the frame tail and the data before the frame header are re-linked into a new packet of data, and the packet of data is continuously processed in a loop until the protocol format check (DL / T698 protocol) is illegal. Then call the frame format check interface function of the DL / T645 protocol to check the frame format of the data packet, and the processing flow is similar to the above DL / T698 protocol processing flow.

[0024] In another implementation of extracting protocol messages, if the data conforms to any communication protocol, the frame tail position of the frame protocol message is determined according to the frame header position and frame length of the protocol message corresponding to the communication protocol, and the frame message conforming to the corresponding communication protocol is extracted; then the data after the frame tail and the data before the frame header are re-linked into a new data packet, and the frame format of the data in the new data packet is continuously checked, and the loop processing is performed according to the above method until no data in the data packet conforms to any communication protocol.

[0025] 2. Data routing module.

[0026] The data routing module is used to interact with the communication module and the service module, and is responsible for the routing function from each protocol to service data, playing a connecting role. There will be a data routing module corresponding to each protocol, providing data mapping and data format conversion processing at the protocol routing layer, and completing the data processing of the protocol and the service function. It includes a data format conversion unit. The data format conversion unit is used to perform format conversion on the data content corresponding to the protocol message data item received by the electric energy meter or the data content corresponding to the data item returned by the service module after the data routing module determines the data item name according to the mapping relationship corresponding to the protocol message, so as to meet the service data format requirements and complete the data processing of each frame message under each protocol.

[0027] When performing data mapping, usually the data identifier of the DL / T645 protocol is used as the name of the data item for access. For other protocols, their own data identifiers are corresponding to the data identifiers of the DL / T645 protocol to obtain the access right of the data item. This way causes the data to be too tightly bundled with the protocol, which is not conducive to the modularization of the protocol and is likely to cause the problem that the code is complex and difficult to understand when multiple protocols coexist. Therefore, as a preferred implementation manner, the data item names in the smart meter of the present invention are no longer identified by the data identifiers of DL / T645, but are defined in the way of a data name system. The data name system defines all the data item names of the electric energy meter, thereby completely decoupling the data from the protocol and solving the problems of data independence and different protocol data formats. Specifically, a corresponding data mapping table is set in the data routing module of each communication protocol. The data mapping table stores the corresponding relationship between all the data identifiers and the data item names under the type of this communication protocol, and is used to determine the corresponding data item name in the data mapping table of the corresponding communication protocol according to the data identifier in the protocol message. After the protocol message data is transmitted to the data routing module, the corresponding data item name of the protocol data is found according to the data mapping table, and the data is routed to the service module according to this data name to complete the read and write operations of the data content. The data mapping table corresponds the data identifier of the protocol with the data name system, no longer binds the protocol and the service, plays the role of isolating the protocol and the service, solves the problem of multi-protocol bundling and coupling, realizes the modularization of the protocol, improves the intelligence level of the smart meter, and reduces the difficulty of protocol development and maintenance.

[0028] The interaction between the data routing module and the service module includes the reading operation and the setting operation on the service module. As Figure 3 shown, the process of the reading operation is: routing the data item name in the protocol message to the service module, the service module returns the data content of the corresponding data item to the data routing module, and the data format conversion unit in the data routing module performs data format conversion on the data content returned by the service module and then uploads it. As Figure 4 shown, the process of the setting operation is: the data format conversion unit in the data routing module performs data format conversion on the data content corresponding to the protocol message data item received by the electric energy meter, routes the data item name and the data content after format conversion to the service module, and the service module sets the data item according to the received data content.

[0029] The smart meter further includes a service module. The service module of the smart meter includes an electric energy module, a control module and other modules. Among them, the electric energy module is responsible for the accumulation and settlement of electric energy. The control module is responsible for the switch control of the electric meter and some other functions. The other modules refer to some other service modules, such as a fee control module, a card swiping module and an event module, etc.

[0030] Method Embodiment An intelligent electric meter multi - protocol processing method of the present invention, the processing flow includes: Extract the data packets received by the electric energy meter according to the frame formats of each communication protocol to obtain frame messages under each communication protocol; In one embodiment, set the communication protocol extraction order. Extract the messages in the data packet that conform to the first communication protocol frame format according to the first communication protocol frame format, and form the remaining messages into a new data packet; extract the messages in the new data packet that conform to the second communication protocol frame format according to the second communication protocol frame format; extract each frame message that conforms to other communication protocols in sequence according to the above method. The process of extracting the messages in the data packet that conform to the frame format of a corresponding communication protocol is as follows: extract the first - frame communication protocol message from the data packet according to the frame format of this communication protocol, then re - form the data after the frame tail and before the frame head of this frame protocol message into a new data packet, and extract the second - frame communication protocol message from the new data packet according to the frame format of this communication protocol, and so on in a loop until all the messages in the data packet that conform to this communication protocol are extracted.

[0031] In another embodiment, if the data conforms to any communication protocol, determine the frame tail position of this frame protocol message according to the frame head position and frame length of the protocol message of the corresponding communication protocol, and extract this frame message that conforms to the corresponding communication protocol; then re - link the data after the frame tail and before the frame head into a new data packet, continue to check the frame format of the data in the new data packet, and process it in a loop according to the above method until there is no data in the data packet that conforms to any communication protocol.

[0032] Send each frame message under each communication protocol to the corresponding data routing modules through the corresponding communication protocol transmission links. The data routing modules are used to interact with the communication module and the service module, and include a data format conversion unit. The data routing modules corresponding to each communication protocol determine the data item names according to the mapping relationship corresponding to the protocol messages. The data format conversion unit converts the data content corresponding to the data items of the protocol messages received by the electric energy meter or the data content corresponding to the data items returned by the service module to complete the data processing of each frame message under each protocol.

[0033] The interaction with the service module includes reading and setting operations on the service module. The process of the setting operation is as follows: the data format conversion unit in the data routing module converts the data content corresponding to the data items of the protocol messages received by the electric energy meter, routes the data item names and the converted data content to the service module, and the service module sets the data items according to the received data content. The process of the reading operation is as follows: route the data item names in the protocol message to the service module, the service module returns the data content of the corresponding data item to the data routing module, and the data format conversion unit in the data routing module converts the data content returned by the service module and then uploads it.

[0034] Furthermore, a data mapping table is set in each data routing module corresponding to a communication protocol. The data mapping table stores the correspondence between all data identifiers and data item names under the type of this communication protocol. According to the data identifier in the protocol message, the corresponding data item name is determined in the data mapping table of the data routing module corresponding to the communication protocol. The data is defined in the way of all data item names corresponding to each protocol, and the protocol data identifier is no longer used for identification, completely decoupling the data from the protocol, solving the problem of multi-protocol bundling and coupling, realizing protocol modularization, and reducing the difficulty of protocol development and maintenance.

Claims

1. A multi-protocol processing method for a smart meter, characterized in that: include: Extract the data packets received by the electric energy meter according to the frame formats of each communication protocol to obtain the frame messages under each communication protocol; Each frame message under each communication protocol extracted is sent to the corresponding data routing module through the corresponding communication protocol transmission link. The data routing module is used to interact with the communication module and the business module, and includes a data format conversion unit. The data routing module corresponding to each communication protocol determines the data item name according to the mapping relationship corresponding to the protocol message. The data format conversion unit performs format conversion on the data content corresponding to the protocol message data item received by the electric energy meter or the data content corresponding to the data item returned by the business module, and completes the data processing of each frame message under each protocol.

2. The smart meter multi-protocol processing method according to claim 1, characterized in that: The process of extracting according to each communication protocol frame format is as follows: setting a communication protocol extraction order, extracting the messages in the data packet that conform to the first communication protocol frame format according to the first communication protocol frame format, and forming the remaining messages into a new data packet; Extract the message that complies with the second communication protocol frame format from the new data packet according to the second communication protocol frame format; and extract the frame messages that comply with other communication protocols in sequence according to the above method.

3. The multi-protocol processing method for a smart meter according to claim 1, characterized in that: The process of extracting messages that conform to a corresponding communication protocol frame format in a data packet is as follows: extracting a first frame of communication protocol messages from the data packet according to the frame format of the communication protocol, then reorganizing the data after the frame tail and the data before the frame header of the frame protocol message into a new data packet, and extracting a second frame of communication protocol messages from the new data packet according to the frame format of the communication protocol, and repeating this process until all messages that conform to the communication protocol in the data packet are extracted.

4. The smart meter multi-protocol processing method according to any one of claims 1 to 3, characterized in that: The formats of each communication protocol frame include a protocol frame start byte, an end byte, a protocol category byte, a total length field of transmitted data, and a frame check byte.

5. The smart meter multi-protocol processing method according to claim 1, characterized in that: The process of determining the data item name according to the mapping relationship corresponding to the protocol message is as follows: according to the data identifier in the extracted protocol message, the corresponding data item name is determined in the data mapping table in the data routing module of the corresponding communication protocol; the data mapping table stores the correspondence between all data identifiers and data item names under the communication protocol type, and a corresponding data mapping table is set in the data routing module corresponding to each communication protocol.

6. The multi-protocol processing method for a smart meter according to claim 1, characterized in that: Interacting with the business module includes performing a reading operation on the business module. The process of the reading operation is: routing the data item name in the protocol message to the business module, the business module returns the data content of the corresponding data item to the data routing module, and the data format conversion unit in the data routing module converts the data format of the data content returned by the business module and sends it up.

7. The smart meter multi-protocol processing method according to claim 1 or 6, characterized in that: Interacting with the business module includes performing setting operations on the business module. The process of the setting operation is as follows: the data format conversion unit in the data routing module converts the data format corresponding to the data content of the protocol message data item received by the electric energy meter, routes the data item name and the data content after format conversion to the business module, and the business module sets the data item according to the received data content.

8. A smart electric meter, comprising a communication module, characterized in that: It also includes a data routing module, the communication module is used to extract the data packets received by the electric energy meter according to the frame formats of each communication protocol, obtain the frame messages under each communication protocol, and send each frame message under each communication protocol extracted to the corresponding data routing module through the corresponding communication protocol transmission link; the data routing module is used to interact with the communication module and the business module, and includes a data format conversion unit, and the data format conversion unit is used to perform format conversion on the corresponding data content of the protocol message data item received by the electric energy meter or the corresponding data content of the data item returned by the business module after the data routing module determines the data item name according to the mapping relationship corresponding to the protocol message, so as to complete the data processing of each frame message under each protocol.

9. The smart electric meter according to claim 8, characterized in that: The process of the communication module extracting according to each communication protocol frame format is as follows: setting the communication protocol extraction order, extracting the messages in the data packet that conform to the first communication protocol frame format according to the first communication protocol frame format, and forming the remaining messages into a new data packet; Extract the message that complies with the second communication protocol frame format from the new data packet according to the second communication protocol frame format; and extract the frame messages that comply with other communication protocols in sequence according to the above method.

10. The smart electric meter according to claim 8 or 9, characterized in that: The data routing module also includes a data mapping table, which stores the correspondence between all data identifiers and data item names under the communication protocol type, and is used to determine the corresponding data item name in the data mapping table in the data routing module of the corresponding communication protocol according to the data identifier in the protocol message.

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