BIT centralized management method based on field bus

Abstract

This invention discloses a BIT centralized management method based on fieldbus, belonging to the field of communication technology. It adopts a two-level networking architecture system, consisting of underlying CAN node devices and a first-level centralized data aggregation module. The data aggregation module implements more than a dozen CAN bus interfaces and network functions, enabling bidirectional data interaction between the network and the dozen or so CAN buses through programming. During normal system operation, each CAN bus interface of the data aggregation module actively collects information from subordinate node devices and integrates all CAN data into network data, actively reporting it to the system master controller. This invention replaces the original three-level management architecture with a two-level architecture using gigabit high-speed Ethernet and multiple CAN buses, adapting to the miniaturization and low-cost management requirements of large-scale intelligent active systems. Compared to the original architecture, it covers all functions with lower hardware costs, simplifies data management and distribution control, and greatly improves maintenance efficiency.

Description

Technical Field

[0001] This invention belongs to the field of communication technology, specifically a BIT centralized management method based on fieldbus. Background Technology

[0002] Large-scale intelligent active systems typically install a large number of CAN interface-based node devices, such as power supplies and cooling units; some large-scale intelligent active systems can even have thousands of nodes. Traditional CAN interface BIT management methods often employ a three-tier architecture: the bottom-level CAN node network connects to the middle-level secondary management units, and each secondary management unit aggregates data via an internal Ethernet network to a primary data aggregation point. This data aggregation then interacts with the system's main control system via a gigabit high-speed network port. This architecture is highly complex; the middle-level network-based interface expansion modules are large, have a limited number of interfaces, and offer only a single type of interface. Furthermore, it requires additional hardware and software overhead, such as switches, and involves too many relay devices, making debugging inconvenient.

[0003] Meanwhile, since the underlying CAN node devices cannot completely avoid program updates, the current parallel online update method using data aggregation Ethernet and CAN bus has a certain probability of UDP data packet loss through the intermediate Ethernet layer, which may require another update operation, making system maintainability slightly inconvenient.

[0004] To solve the above problems, the original communication link needs to be optimized to achieve centralized management and control of distributed device nodes with lower cost and smaller size. Therefore, a BIT centralized management method based on fieldbus is proposed. Summary of the Invention

[0005] The purpose of this invention is to provide a BIT centralized management method based on fieldbus to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a BIT centralized management method based on fieldbus, which adopts a two-level networking architecture system, consisting of a bottom-level CAN node device and a first-level centralized data aggregation module; the data aggregation module implements more than a dozen CAN bus interfaces and network functions, and realizes bidirectional data interaction between the network and more than a dozen CAN buses through programming.

[0007] Preferably, when the system is working normally, the data aggregation module actively collects information of subordinate node devices through each CAN bus interface, integrates all CAN data information into network data, and actively reports it to the system master controller; during downlink communication, the network control commands are directly forwarded through the CAN interface.

[0008] Preferably, the data aggregation module integrates two gigabit optical and electrical network communication functions, 16 CAN interfaces, two serial bus interfaces, and multiple TTL, differential, relay, and on / off type input / output interfaces.

[0009] Preferably, the data aggregation module is built on a minimal hardware system based on the domestically produced ZYNQ chip, and externally expanded with DDR, QSPIFLASH, and EMMC storage chips.

[0010] Preferably, the data management and transmission, based on valid data according to the bidirectional protocol, achieves bidirectional data interaction between the network and the CAN bus by directly assigning values ​​to global variables.

[0011] Preferably, when the underlying CAN node program is updated online, the update file is transmitted to the data aggregation module via Ethernet, and the data aggregation module directly completes the node program update through CAN bus packet broadcast.

[0012] Preferably, the data aggregation module is ported to an embedded Linux operating system, supporting file system, work log recording, and local logical operations.

[0013] Preferably, the two-level architecture replaces the traditional three-level distributed control architecture, eliminating the intermediate layer protocol conversion module and switch equipment.

[0014] The beneficial effects of this invention are as follows: This invention replaces the original three-level management architecture with a two-level architecture that uses gigabit high-speed Ethernet and multiple CAN buses to meet the miniaturization and low-cost management requirements of large-scale intelligent active systems. Compared with the original architecture, it covers all functions with less hardware cost, and data management and distribution control are also simplified, greatly improving maintenance efficiency. Attached Figure Description

[0015] Figure 1 This is a block diagram illustrating the principle of the three-tier management architecture of this invention; Figure 2 This is a block diagram illustrating the principle of the two-level management architecture of this invention; Figure 3 This is a block diagram illustrating the principle of centralized data aggregation management in this invention. Detailed Implementation

[0016] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example

[0017] This invention provides a centralized BIT management method based on fieldbus, such as... Figure 1 , Figure 2 As shown, in a traditional distributed three-level control system architecture, the third level is the lowest level, consisting of node devices based on CAN bus interface communication. These devices are typically located in various parts of the system and are relatively dispersed. The second level is the middle layer, which uses an externally purchased CAN-network protocol conversion module. However, this device can only serve as a relay device between the first and third levels, and its data management method is transparent transmission. It cannot actively query data from subordinate CAN nodes or report network data. Furthermore, it must strictly adhere to the established communication protocol, which causes inconvenience to communication between upper and lower levels. Too many protocol conversion modules increase the network burden of the system, requiring the addition of an external switch. The first level is the data aggregation module, which establishes a connection between the internal network port and the intermediate layer protocol conversion module to complete data interaction, and realizes information interaction with the system master control through the external network port.

[0018] The architecture of this invention optimizes the traditional distributed control system architecture into a two-level architecture, consisting of node devices based on CAN bus interface communication at the bottom level and a first-level data aggregation module integrating more than a dozen CAN bus interfaces and network functions.

[0019] When the system is working normally, the data aggregation module actively collects information of subordinate node devices through each CAN bus interface and integrates all CAN data into network data and actively reports it to the system master controller; during downlink communication, network control commands are directly forwarded through the CAN interface, which significantly improves management efficiency.

[0020] The centralized management data aggregation module in this invention is the core of the new management architecture. This module uses the domestically produced ZYNQJYX4S045 chip as the main controller, combined with external DDR, QSPIFLASH, and EMMC chips to build a minimal management system, expanding the ZYNQ chip's memory and external storage capabilities, reserving runtime space for subsequent software design and functional expansion. Through the built-in peripherals of the ZynqPS terminal and the programmable capabilities of the PL terminal, it realizes two-way gigabit optical and electrical network communication functions, as well as 16 CAN interfaces, 2 serial ports, and other networkable fieldbus interfaces, and dozens of commonly used TTL, differential, relay, and on / off input / output interfaces. Figure 3 EMIO_IN and EMIO_OUT interfaces are extended; the principle block diagram of the centralized management data aggregation module is as follows: Figure 3 As shown.

[0021] Meanwhile, to improve data management and conversion efficiency between channels and the parallel execution capability of the PS end, the open-source Linux embedded operating system is ported, supporting file systems and having work log recording and storage functions; it has certain local computing and management capabilities, can handle relatively complex logic, realize centralized management functions, and is also suitable for application scenarios such as intelligent management and self-closed-loop health management.

[0022] When the underlying CAN node program is updated online, the binary .bin file to be updated is transmitted to the data aggregation point via the network. After receiving the update command, the data aggregation point reads the .bin file and stores it in local memory. Subsequently, according to the underlying node program update protocol and timing, it is sent to each node via CAN bus packet broadcast, and finally the update of all node programs is completed.

[0023] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0024] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A centralized BIT management method based on fieldbus, employing a two-level network architecture system, characterized in that: It consists of a bottom-level CAN node device and a first-level centralized data aggregation module; the data aggregation module implements more than a dozen CAN bus interfaces and network functions, and realizes bidirectional data interaction between the network and more than a dozen CAN buses through programming.

2. The BIT centralized management method based on field bus according to claim 1, characterized in that: When the system is working normally, the data aggregation module actively collects information of subordinate node devices through each CAN bus interface, integrates all CAN data information into network data, and actively reports it to the system master controller; during downlink communication, the network control commands are directly forwarded through the CAN interface.

3. The BIT centralized management method based on field bus according to claim 1, characterized in that: The data aggregation module integrates two gigabit optical and electrical network communication functions, 16 CAN interfaces, two serial bus interfaces, and multiple TTL, differential, relay, and on / off type input / output interfaces.

4. The BIT centralized management method based on field bus according to claim 1, characterized in that: The data aggregation module is built on a minimal hardware system based on the domestically produced ZYNQ chip, with external expansion of DDR, QSPIFLASH, and EMMC storage chips.

5. The BIT centralized management method based on field bus according to claim 1, characterized in that: The data management and transmission, based on valid data according to the bidirectional protocol, achieves bidirectional data interaction between the network and the CAN bus by directly assigning values ​​to global variables.

6. The BIT centralized management method based on field bus according to claim 1, characterized in that: When the underlying CAN node program is updated online, the update file is transmitted to the data aggregation module via Ethernet, and the data aggregation module directly completes the node program update through CAN bus packet broadcast.

7. The BIT centralized management method based on field bus according to claim 4, characterized in that: The data aggregation module is ported to an embedded Linux operating system and supports file system, work log recording, and local logical operations.

8. The BIT centralized management method based on field bus according to claim 1, characterized in that: The two-level architecture replaces the traditional three-level distributed control architecture, eliminating the intermediate layer protocol conversion module and switch equipment.

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