CN111447084A - Interconnection and fusion method and system for heterogeneous industrial network - Google Patents

Interconnection and fusion method and system for heterogeneous industrial network Download PDF

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CN111447084A
CN111447084A CN202010195735.XA CN202010195735A CN111447084A CN 111447084 A CN111447084 A CN 111447084A CN 202010195735 A CN202010195735 A CN 202010195735A CN 111447084 A CN111447084 A CN 111447084A
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industrial
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CN111447084B (en
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赵凯
刘斌辉
黄林轶
徐华伟
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China Electronic Product Reliability and Environmental Testing Research Institute
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/08—Configuration management of networks or network elements
    • H04L41/0893—Assignment of logical groups to network elements
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
    • G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
    • G05B19/0421—Multiprocessor system
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/40—Bus networks
    • H04L12/40006—Architecture of a communication node
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/12—Discovery or management of network topologies
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/08—Protocols for interworking; Protocol conversion
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/18—Multiprotocol handlers, e.g. single devices capable of handling multiple protocols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/22—Parsing or analysis of headers

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Abstract

The invention discloses a heterogeneous industrial network interconnection fusion method, which comprises the following steps: setting a general industrial field network connection integration system, and periodically detecting and analyzing link layer data in a heterogeneous network; generating and storing a network management strategy file in a memory of the reconfigurable control module; and loading a corresponding network management strategy file, and downloading the compiled specific configuration bit stream file to an FPGA subsystem of the reconfigurable control module to complete network reconfiguration. The invention also discloses a system for implementing the method, which comprises a reconfigurable control module, a reconfigurable wireless module and a universal wired communication module which are mutually connected and communicated. The invention can realize interconnection and intercommunication among heterogeneous devices and networking acquisition of industrial data, so that the devices have interoperability and interoperability, and flexible networking and reconstruction are easy to realize, thereby promoting the process of automatic and intelligent upgrading and reconstruction of industrial devices.

Description

Interconnection and fusion method and system for heterogeneous industrial network
Technical Field
The invention relates to the technical field of industrial equipment field communication, in particular to an interconnection and fusion method and system of a heterogeneous industrial network, which provides a general industrial networking system based on software definition and a general implementation method for reconstructing different communication modes, and is used for data acquisition and interoperation of various industrial control equipment in an industrial field in different access modes.
Background
The Fieldbus is an industrial data bus developed in the field of electrical engineering and automation, and mainly solves the problem of digital communication between field devices such as intelligent instruments, controllers and actuators in industrial fields and the problem of information transmission between these field control devices and advanced control systems. The field bus has received a great deal of attention from many standards bodies and computer manufacturers because of a series of outstanding advantages, such as simplicity, reliability, economy and practicality.
The Fieldbus (Fieldbus) was developed internationally in the late 80 and early 90 th 20 th century and is used for field intelligent device interconnection communication networks in the fields of process automation, manufacturing automation, building automation, and the like. It is used as the basis of digital communication network in factory to communicate the production process site and the control equipment and the connection between them and higher control management level. It is not only a basic network, but also an open type, new type of fully distributed control system. The comprehensive technology which takes technologies such as intelligent sensing, control, computer, digital communication and the like as main contents has received attention worldwide, becomes a hotspot of the development of automation technology, and leads to the deep revolution of the structure and equipment of an automation system. Many international companies with strength and influence have developed fieldbus technology and products to different extents. The working environment of the field bus equipment is positioned at the bottom layer of the process equipment and is used as a basic communication network of a factory equipment level, and the field bus equipment has the characteristics of simple protocol, strong fault-tolerant capability, good safety and low cost: the method has the characteristics of certain time certainty, higher real-time requirement, stable network load, short frame transmission mostly, frequent information exchange and the like. Due to the characteristics, the field bus system has the characteristics of different upper-layer high-speed data communication networks from a network structure to a communication technology.
Generally, a pneumatic signal control system PCS before 50 years is called a first generation, an electric analog signal control system such as 4-20 mA is called a second generation, a digital computer centralized control system is called a third generation, and a distributed control system DCS since the middle 70 years is called a fourth generation. The field bus control system FCS is used as a new generation control system, on one hand, the limitation that a communication special network is adopted in a DCS is broken through, a solution scheme based on publicization and standardization is adopted, and the defects caused by a closed system are overcome; on the other hand, the distributed system structure combining the distributed phase and the concentrated phase of the DCS is changed into a novel fully distributed structure, and the control function is completely released to the site. Therefore, openness, decentralization, and digital communication are the most prominent features of fieldbus systems.
As described above, in the historical development of industrial equipment, due to competition of a plurality of fieldbus technologies in the field of industrial equipment control, several types and hundreds of industrial equipment field communication standards are generated, and the standards are not compatible with each other. Meanwhile, due to the independence of each device in the design link of a manufacturer, the communication modes, protocols and interfaces adopted by the existing industrial equipment are complicated, and a plurality of communication protocols and interfaces cannot be compatible and compatible with each other to carry out connection and communication.
Currently, there are more than 40 kinds of field buses internationally, but none of the field buses can cover all application planes, and the size of data transmitted by the field buses can be classified into 3 types: a sensor bus (sensor bus) belonging to bit transfer; a device bus (devicebus) belonging to byte transmission; the field bus belongs to data stream transmission, meanwhile, no networking system is compatible with multiple industrial field bus protocols, and interconnection and intercommunication of multiple communication modes are realized on the same equipment under the condition of not replacing any hardware, so that a user cannot master the initiative of system integration, and the accuracy, reliability, easiness in reconfiguration and the like of the system are obviously insufficient.
The invention of Chinese patent application 201711351078.8 discloses a heterogeneous network interconnection and intercommunication fusion system and method, wherein the heterogeneous network interconnection and intercommunication fusion system comprises a gateway fusion layer for realizing interconnection between a WSN (wireless sensor network) based on Zigbee and a wireless access network, a network adaptation layer added in the network layer for uniformly managing network interfaces of the wireless access network, and a core processing module, wherein the core processing module is respectively connected with a Zigbee module, a touch display screen block, a WCDMA (wideband code division multiple access) module and a W L AN module through wireless.
In view of the above problems, it is very necessary to research a universal networking integration method and system for heterogeneous industrial field buses, which support various devices to access in different ways, implement interconnection and intercommunication among heterogeneous devices and networking acquisition of industrial data, so that the devices have interoperability and interoperability, and are easy to flexibly network and reconfigure, thereby promoting the process of automatic and intelligent upgrading and reconstruction of industrial devices.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a universal interconnection and fusion method and a universal interconnection and fusion system for heterogeneous industrial networks, so that interconnection and intercommunication fusion between equipment and the equipment and between the equipment and the system can be quickly realized among various industrial equipment communication interfaces adopting different field bus technologies, and the problems are solved.
In order to achieve the purpose, the invention provides the following technical scheme:
an interconnection and fusion method for heterogeneous industrial networks is characterized by comprising the following steps:
(1) setting a general industrial field networking fusion system, which comprises a reconfigurable control module, a reconfigurable wireless module and a general wired communication module which are mutually connected and communicated, wherein the reconfigurable control module comprises an ARM subsystem, a configurable transceiving communication interface, a DSP subsystem and an FPGA subsystem which are sequentially connected; connecting the general industrial field network integration system into a heterogeneous network of a plurality of industrial field bus devices;
(2) the universal industrial field network connection integration system periodically detects and analyzes the link layer data in the heterogeneous network through the corresponding communication interface; analyzing the current network communication protocol type according to different structural characteristics of link layer data among different protocols, automatically identifying the protocol type by analyzing the frame type, sending a topology discovery data message to the heterogeneous network, and scanning the network topology structure of the heterogeneous network; if the universal industrial field network connection integration system cannot identify the current heterogeneous network, alarming, executing the step (3), and if no alarm exists, executing the step (4);
(3) generating a protocol analysis strategy corresponding to the protocol type of the current heterogeneous network by manually configuring the protocol type of the current heterogeneous network, updating the protocol analysis strategy into the protocol analysis strategy, and executing the step (2) after configuration is completed;
(4) configuring a heterogeneous network management model according to network conversion requirements, generating a network management strategy file corresponding to the heterogeneous network management model, and storing the network management strategy file in a memory of a reconfigurable control module;
(5) loading a corresponding network management strategy file, executing a configuration program by the ARM subsystem according to a converged network management strategy, and downloading a compiled specific configuration bit stream file to an FPGA subsystem of the reconfigurable control module to complete network system reconfiguration; at the moment, the general industrial field networking fusion system processes and forwards the data messages between the heterogeneous networks according to the corresponding network management strategies, and fusion and reconstruction of the heterogeneous networks based on software definition are completed.
In the step (2), the link layer data in the heterogeneous network is detected and analyzed, which specifically includes the following steps:
s21, the general industrial field network integration system builds a protocol identifier on the network link layer by loading a protocol analysis strategy file, and automatically carries out periodic analysis on the data of the network link layer;
s22, determining the communication protocol type of the current network based on a decision tree algorithm according to different structural characteristics of link layer data among different protocols;
s23, loading a reconfiguration configuration file of a corresponding protocol by the universal industrial field networking fusion system to complete the reconfiguration of the FPGA;
s24, sending a topology discovery data message to the heterogeneous network, and scanning a network topology structure of the heterogeneous network;
and S25, sending the network topology structure information of the heterogeneous network to an upper computer or a cloud platform through a configuration transceiving communication interface.
In the step (3), the general industrial field networking fusion system is manually configured with the heterogeneous network management model according to the network conversion requirement, and a network management strategy file corresponding to the heterogeneous network management model is generated, which specifically comprises the following steps:
s31, setting an upper computer or a cloud platform, and establishing a heterogeneous network management model on the upper computer or the cloud platform according to the requirements of a user;
s32, the heterogeneous network management model comprises the heterogeneous network protocol type, the network topology structure, the data acquisition rule, the data forwarding rule, the data processing process and the like of the general industrial field network connection and fusion system;
s33, forming a network management strategy file by applying a heterogeneous network model modeling format according to the communication requirement in the networking process;
and S34, the upper computer or the cloud platform downloads the network management strategy file into a memory of the reconfigurable control module through a configuration transceiving communication interface.
An interconnection and fusion system of heterogeneous industrial networks for implementing the method is characterized in that: the reconfigurable control module comprises an ARM subsystem, a configurable transceiving communication interface, a DSP subsystem and an FPGA subsystem which are sequentially connected.
The reconfigurable wireless module consists of a reconfigurable main control circuit, a broadband transmitting channel and a receiving channel, wherein the reconfigurable main control circuit comprises an FPGA, a DDS, an ADC, an attenuator, a radio frequency filter, a frequency mixer, a comprehensive frequency module, a reference clock, L NA and PA gain control, a matrix control switch and a CPCI bus.
The ARM subsystem consists of an ARM microprocessor, an ARM power circuit, an ARM reset circuit, an ARM clock circuit, an ARM memory and an ARM peripheral; the ARM subsystem reconstructs the FPGA subsystem on line through a configuration program, and the on-line dynamic reconstruction of the reconfigurable main control circuit is realized.
The DSP subsystem part consists of a DSP, a DSP power circuit, a DSP clock circuit, a DSP reset circuit and a DSP peripheral; the DSP subsystem mainly processes signals transmitted by the rf module and performs complex operations, which mainly include Amplitude, frequency, pulse Modulation, Quadrature Phase Shift Keying (QPSK), Quadrature Amplitude Modulation (QAM), general signal processing and algorithm design, convolution, hilbert transform, and special operations such as FFT.
The FPGA subsystem part consists of an FPGA, an SDRAM, an FPGA downloading circuit, an FPGA clock circuit, an FPGA reset circuit, an FPGA power supply and an FPGA peripheral; the FPGA subsystem reconstructs a circuit according to a configuration program of the ARM subsystem and is responsible for mutual communication between the DSP subsystem and the ARM subsystem and parallel processing of large-scale tasks.
The configuration transceiving communication interface is used for communication between the general industrial field networking integration system and an upper computer or a cloud platform, so that the upper computer or the cloud platform can send the integration strategy file to the ARM subsystem in a software defined mode, and the ARM subsystem can execute a corresponding configuration program according to the integration strategy file.
The wired communication module comprises a bus communication board card, an optical transceiver and a corresponding physical interface; the bus communication board card is connected with an FPGA in the reconfigurable control module through a buffer or an MII (media independent interface), and comprises an Ethernet transceiver (PHY) supporting 10BASE-T and 100BASE-TX, a CAN bus communication module, an RS-485 bus interface and an RS-232 bus interface; the optical transceiver is connected with the FPGA in the reconfigurable control module through a SERDES (serial deserializer).
The invention has the following beneficial effects and advantages:
1. the method and the system provided by the invention apply the reconfigurable technology to the heterogeneous network convergence of the industrial field bus equipment, and the universal industrial field networking convergence system provided by the invention integrates various physical interfaces, including a broadband wireless radio frequency module, an optical transceiver, an Ethernet transceiver (PHY), a CAN bus communication module, an RS-485 bus interface and an RS-232 bus interface, and supports three communication modes of wireless communication, optical communication and electric signal wired communication; the FPGA reconfigurable technology is used as a basis, real-time embedded operation control is realized by combining an ARM microprocessor and a DSP microprocessor, under the condition of not changing a hardware architecture, interconnection and intercommunication of multiple communication modes under different industrial scenes can be realized by using a uniform hardware architecture and software definition, a user is given low-cost system integration initiative, the user can freely select equipment provided by different manufacturers to integrate the system, the selection range of the equipment is limited due to the selection of a certain brand of product, the initiative in the system integration process can not be thoroughly mastered in the hands of the user due to incompatible protocols and interfaces in the system integration.
2. The protocol identification method of the general industrial field networking fusion system provided by the invention identifies the current network protocol type by periodically detecting and analyzing the data of the network link layer and reading the content of the corresponding field in the communication frame according to the different structural characteristics of the link layer data among different protocols. The protocol identification function is a sensor of the general industrial field network integration system for the system network, and the system can observe network communication under the condition that the bottom layer equipment is in an abnormal working state, analyze the characteristics of the network communication and complete protocol type identification.
3. The heterogeneous industrial network interconnection method and system based on software definition provided by the invention are based on a uniform hardware architecture, and only a corresponding heterogeneous network management model needs to be established on an upper computer or a cloud platform, and the universal industrial field network interconnection fusion system completes the functions of data message acquisition, processing, forwarding and the like of a heterogeneous communication network according to a corresponding network management strategy file, so that the software definition of each function of the universal industrial field network interconnection fusion system is realized, and the accuracy and reliability of the software definition can be greatly improved.
4. The method and the system provided by the invention can realize intelligent and digital upgrading of the field bus equipment at low cost, thus fundamentally improving the accuracy of measurement and control and reducing transmission errors; meanwhile, because the structure of the system is simplified, the number of devices and connecting wires is reduced, and the internal functions of the field instrument are enhanced: the round-trip transmission of signals is reduced, and the working reliability of the system is improved. In addition, the device has the advantages of simple design, easy reconstruction and the like due to the device standardization and the function modularization.
Description of the drawings:
FIG. 1 is a schematic diagram of a system module structure of a universal industrial field networking device of the present invention;
FIG. 2 is a schematic diagram of an implementation flow of the method for identifying a heterogeneous network protocol according to the present invention;
fig. 3 is a schematic diagram of an implementation process of the heterogeneous industrial network interconnection method of the present invention.
Fig. 4 is a schematic diagram of the overall network hierarchical topology of the present invention.
The specific real-time mode is as follows:
in order to make the objects, technical solutions and technical effects of the present invention more clearly apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the description herein of specific embodiments is intended to be illustrative of the invention and is not intended to limit the invention.
Example 1:
referring to fig. 1 to 4, an interconnection and fusion method for heterogeneous industrial networks according to an embodiment of the present invention includes the following steps:
(1) setting a general industrial field networking fusion system, which comprises a reconfigurable control module, a reconfigurable wireless module and a general wired communication module which are mutually connected and communicated, wherein the reconfigurable control module comprises an ARM subsystem, a configurable transceiving communication interface, a DSP subsystem and an FPGA subsystem which are sequentially connected; connecting the general industrial field network integration system into a heterogeneous network of a plurality of industrial field bus devices;
(2) the universal industrial field network connection integration system periodically detects and analyzes the link layer data in the heterogeneous network through the corresponding communication interface; analyzing the current network communication protocol type according to different structural characteristics of link layer data among different protocols, automatically identifying the protocol type by analyzing the frame type, sending a topology discovery data message to the heterogeneous network, and scanning the network topology structure of the heterogeneous network; if the universal industrial field network connection integration system cannot identify the current heterogeneous network, alarming, executing the step (3), and if no alarm exists, executing the step (4);
(3) generating a protocol analysis strategy corresponding to the protocol type of the current heterogeneous network by manually configuring the protocol type of the current heterogeneous network, updating the protocol analysis strategy into the protocol analysis strategy, and executing the step (2) after configuration is completed;
(4) configuring a heterogeneous network management model according to network conversion requirements, generating a network management strategy file corresponding to the heterogeneous network management model, and storing the network management strategy file in a memory of a reconfigurable control module;
(5) loading a corresponding network management strategy file, executing a configuration program by the ARM subsystem according to a converged network management strategy, and downloading a compiled specific configuration bit stream file to an FPGA subsystem of the reconfigurable control module to complete network system reconfiguration; at the moment, the general industrial field networking fusion system processes and forwards the data messages between the heterogeneous networks according to the corresponding network management strategies, and fusion and reconstruction of the heterogeneous networks based on software definition are completed.
In the step (2), the link layer data in the heterogeneous network is detected and analyzed, which specifically includes the following steps:
s21, the general industrial field network integration system builds a protocol identifier on the network link layer by loading a protocol analysis strategy file, and automatically carries out periodic analysis on the data of the network link layer;
s22, determining the communication protocol type of the current network based on a decision tree algorithm according to different structural characteristics of link layer data among different protocols;
s23, loading a reconfiguration configuration file of a corresponding protocol by the universal industrial field networking fusion system to complete the reconfiguration of the FPGA;
s24, sending a topology discovery data message to the heterogeneous network, and scanning a network topology structure of the heterogeneous network;
and S25, sending the network topology structure information of the heterogeneous network to an upper computer or a cloud platform through a configuration transceiving communication interface.
In the step (3), the general industrial field networking fusion system is manually configured with the heterogeneous network management model according to the network conversion requirement, and a network management policy file corresponding to the heterogeneous network management model is generated, which specifically includes the following steps:
s31, setting an upper computer or a cloud platform, and establishing a heterogeneous network management model on the upper computer or the cloud platform according to the requirements of a user;
s32, the heterogeneous network management model comprises the heterogeneous network protocol type, the network topology structure, the data acquisition rule, the data forwarding rule, the data processing process and the like of the general industrial field network connection and fusion system;
s33, forming a network management strategy file by applying a heterogeneous network model modeling format according to the communication requirement in the networking process;
and S34, the upper computer or the cloud platform downloads the network management strategy file into a memory of the reconfigurable control module through a configuration transceiving communication interface.
The interconnection and fusion system (namely the universal heterogeneous industrial field network interconnection and fusion system) for implementing the method comprises a reconfigurable control module, a reconfigurable wireless module and a universal wired communication module which are mutually connected and communicated, wherein the reconfigurable control module comprises an ARM subsystem, a configurable transceiving communication interface, a DSP subsystem and an FPGA subsystem which are sequentially connected.
The reconfigurable wireless module comprises a reconfigurable main control circuit, a broadband transmitting channel and a receiving channel, wherein a multi-band division mode is adopted to realize full duplex FDD/TDD, the coverage of a 2 MHz-8 GHz frequency band is realized by three frequency bands of 2 MHz-2 GHz, 2 GHz-4 GHz and 4 GHz-8 GHz respectively, and the reconfigurable main control circuit comprises an FPGA, a DDS, an ADC, an attenuator, a radio frequency filter, a mixer, a comprehensive frequency module, a reference clock, L NA and PA gain control, a matrix control switch, a CPCI bus and the like.
The ARM subsystem consists of an ARM microprocessor, an ARM power circuit, an ARM reset circuit, an ARM clock circuit, an ARM memory and an ARM peripheral; the ARM subsystem reconstructs the FPGA subsystem on line through a configuration program, and the on-line dynamic reconstruction of the reconfigurable main control circuit is realized.
The DSP subsystem part consists of a DSP, a DSP power circuit, a DSP clock circuit, a DSP reset circuit and a DSP peripheral; the DSP subsystem mainly processes signals transmitted by the rf module and performs complex operations, which mainly include Amplitude, frequency, pulse Modulation, Quadrature Phase Shift Keying (QPSK), Quadrature Amplitude Modulation (QAM), general signal processing and algorithm design, convolution, hilbert transform, and special operations such as FFT.
The FPGA subsystem part consists of an FPGA, an SDRAM, an FPGA downloading circuit, an FPGA clock circuit, an FPGA reset circuit, an FPGA power supply and an FPGA peripheral; the FPGA subsystem reconstructs a circuit according to a configuration program of the ARM subsystem and is responsible for mutual communication between the DSP subsystem and the ARM subsystem and parallel processing of large-scale tasks.
The configuration transceiving communication interface is used for communication between the general industrial field networking integration system and an upper computer or a cloud platform, so that the upper computer or the cloud platform can send the integration strategy file to the ARM subsystem in a software defined mode, and the ARM subsystem can execute a corresponding configuration program according to the integration strategy file.
The wired communication module comprises a bus communication board card, an optical transceiver and a corresponding physical interface; the bus communication board card is connected with an FPGA in the reconfigurable control module through a buffer or an MII (media independent interface), and comprises an Ethernet transceiver (PHY) supporting 10BASE-T and 100BASE-TX, a CAN bus communication module, an RS-485 bus interface and an RS-232 bus interface; the optical transceiver is connected with the FPGA in the reconfigurable control module through a SERDES (serial deserializer).
The invention can realize double-layer reconstruction of hardware and software. The reconfigurable hardware means that the reconfigurable control module, the reconfigurable wireless module and the universal wired communication module adopt a separated architecture design, wherein the reconfigurable control module is a main board, and the reconfigurable wireless module and the universal wired communication module are daughter boards. The daughter board is a communication module with a simple structure and functions, and can realize operations such as direct down-conversion processing and filtering of signals. The main board is a general high-performance signal processing platform, and different platforms can be reconstructed according to different requirements to realize the required functions.
The software reconfiguration of the present invention is divided into two aspects. Firstly, the method is realized by adopting a high-performance FPGA chip with a dynamic reconfiguration function. The FPGA is utilized to realize dynamic reconstruction of local or global chip logic by means of internal specific cache logic resources aiming at a digital logic system with time sequence change. The reconstruction mode based on the FPGA can be realized by adopting a design idea based on modularization or a design flow of EAPR (early Access Partial reconfiguration). The other embodiment of software reconfiguration is that a dual-port RAM is constructed by means of rich resources in the FPGA to realize the mutual communication of the DSP subsystem and the ARM subsystem. In conclusion, the design scheme can increase the flexibility of system hardware and can fully realize the reconfigurability of software.
Referring to the first figure, the system module composition structure of the general heterogeneous industrial field networking fusion system comprises a reconfigurable control module, a reconfigurable wireless module and a general wired communication module. The system is a general industrial field networking fusion system based on software definition, and specifically comprises a reconfigurable control module, a reconfigurable wireless module and a general wired communication module.
In the step (2), the general heterogeneous industrial field networking fusion system detects and analyzes a heterogeneous network, and specifically includes the following steps:
(21) the general heterogeneous industrial field network connection integration system constructs a protocol identifier on a network link layer by loading a protocol analysis strategy file, and automatically carries out periodic analysis on data of the network link layer;
(22) determining the communication protocol type of the current network based on a decision tree algorithm according to different structural characteristics of link layer data among different protocols;
(23) the general heterogeneous industrial field network connection integration system loads a reconfiguration configuration file of a corresponding protocol to complete the reconfiguration of the FPGA;
(24) sending a topology discovery data message to the heterogeneous network, and scanning a network topology structure of the heterogeneous network;
(25) and sending the network topology structure information of the heterogeneous network to an upper computer or a cloud platform through a configuration transceiving communication interface.
The decision tree algorithm for identifying the communication protocol type in the step (22) is as follows:
inputting a training data set D, a feature set A and a threshold;
the process is as follows: the function TreeGenerator (D, A).
STEP 1: entropy of node a: ent (D, a)
STEP 2: entropy of set D: ent (D)
STEP 3: calculating node information gain: gain (D, a) ═ Ent (D) -Ent (D, a)
STEP4 node a divides set D into { D1,D2,...Dv}：
Figure BDA0002417529850000121
STEP5 node information gain ratio:
Figure BDA0002417529850000122
fig. two is a schematic diagram of a heterogeneous network protocol identification process, which specifically includes the following steps:
(1) connecting the general industrial field network connection integration system into a plurality of industrial field heterogeneous networks;
(2) the general industrial field network integration system loads a protocol analysis strategy file from an ARM memory;
(3) reconstructing an FPGA subsystem according to a protocol analysis strategy, and periodically detecting link layer data in the accessed heterogeneous network;
(4) determining the communication protocol type of the current network based on a decision tree algorithm according to different structural characteristics of link layer data among different protocols;
(5) the universal industrial field network connection integration system loads a reconfiguration configuration file of a corresponding protocol to complete the reconfiguration of the FPGA;
(6) sending topology discovery data messages of corresponding protocols to the heterogeneous network, scanning a network topology structure of the heterogeneous network, and automatically detecting, classifying and identifying equipment on the network;
(7) if the universal heterogeneous industrial field network connection integration system cannot identify the current heterogeneous network, alarming, executing the step (8), and if no alarm exists, executing the step (9);
(8) and generating a protocol analysis strategy corresponding to the protocol type of the current heterogeneous network by manually configuring the protocol type of the current heterogeneous network, and updating the protocol analysis strategy. After the configuration is finished, executing the step (2);
(9) and sending the network topology structure information of the heterogeneous network to an upper computer or a cloud platform through a configuration transceiving communication interface.
The embodiment of the present application only takes the multiple heterogeneous industrial network interconnection applications shown in fig. three as an example to describe the implementation process of the heterogeneous industrial network interconnection method based on software definition provided in the embodiment of the present application, but the application scenario of the method is not strictly limited, and different heterogeneous industrial network fusion scenarios can be flexibly applied without departing from the spirit of the technical solution of the embodiment of the present application.
Referring to fig. three (a), the general heterogeneous industrial field networking integration system is provided with 5 types of data exchange interfaces, wherein the configured transceiving communication interface is mainly used for communication between the general industrial field networking integration system and an upper computer or a cloud platform, and can also communicate with a northbound information system (such as SCADA, MES, ERP and the like), but cannot be used as a southbound communication interface. The broadband wireless radio frequency module, the passive optical transceiver, the industrial Ethernet interface and the industrial field bus interface are mainly used for being compatible with physical communication interfaces of various heterogeneous networks, cover wireless communication, a passive optical network, a field bus and an industrial Ethernet, can be used as a southbound or northbound real-time communication interface, for example, can be simultaneously connected with southbound equipment such as various industrial equipment, industrial robots, sensors, controllers and the like and northbound information systems such as SCADA, MES, ERP and the like, and the specific connection type and the number are determined according to specific application scenes and the number of the communication interfaces.
For example, the general heterogeneous industrial field networking fusion system is used as a slave station and is connected with a master station of an EtherCAT protocol type through an industrial Ethernet, a target servo motor is connected with the general heterogeneous industrial field networking fusion system through a CAN bus interface of an industrial field bus, an industrial sensor is connected with a broadband wireless radio frequency module through L ora, and the general industrial field networking fusion system needs to forward control data sent by the EtherCAT master station to the target servo motor through the CAN bus, simultaneously reads data sensed by the industrial sensor regularly and sends the data to a northbound information system through a passive optical network.
Referring to fig. three (b), the application scenario specifically includes the following steps:
(1) the method specifically comprises the steps of connecting a northbound information system through a passive optical network, connecting an EtherCAT main station through an industrial Ethernet, connecting a target servo motor through a CAN bus, and connecting an industrial sensor through L ora.
(2) And (4) identifying the heterogeneous network protocol, and if the heterogeneous network protocol cannot be automatically identified, manually configuring the heterogeneous network protocol.
(3) And sending the topology discovery data message to the heterogeneous network, and scanning the network topology structure of the heterogeneous network. And sending the network topology structure information of the heterogeneous network to an upper computer or a cloud platform through a configuration transceiving communication interface.
(4) In the application scenario, data messages of an industrial Ethernet and data messages on a CAN bus are mutually decoded and forwarded, an EtherCAT master station drives a target servo motor, data sensed by an industrial sensor are periodically read through L ora, the data are sent to a northbound information system through a passive optical network, and configuration parameters such as time synchronization, priority, Qos guarantee and the like are determined.
(5) And configuring a heterogeneous network management model according to network conversion requirements, generating a network management strategy file corresponding to the heterogeneous network management model, and storing the network management strategy file in a memory of the reconfigurable control module. And loading a corresponding network management strategy file, executing a configuration program by the ARM subsystem according to the converged network management strategy, and downloading the compiled specific configuration bit stream file to the FPGA subsystem of the reconfigurable control module to complete reconfiguration.
(6) And the general heterogeneous industrial field networking fusion system processes and forwards the data messages between the heterogeneous networks according to the corresponding network management strategies to complete the fusion of the heterogeneous networks.
Referring to the fourth drawing, the universal heterogeneous industrial field networking convergence system provided by the invention can be used as an industrial network integration device at the field level and the workshop level of an intelligent manufacturing workshop, is deployed at a production field, and realizes communication protocol conversion of communication interfaces such as field devices and sensors and interconnection and intercommunication with a controller and a monitoring and monitoring device through various heterogeneous network physical communication interfaces including wireless communication, a passive optical network, a field bus, an industrial ethernet and the like. The system can also be deployed in a workshop-level machine room at the same time, is connected with a northbound information system (HMI, SCADA, MES and the like), is monitored and integrally controlled by taking a production line as a unit, and realizes interconnection and intercommunication among different production lines in a workshop, a centralized controller and equipment and interconnection and intercommunication between the production lines and an internal network of a factory outside the workshop.
The universal networking fusion method and the universal networking fusion system for the heterogeneous industrial field bus can support various devices to be accessed in different modes, realize interconnection and intercommunication among heterogeneous devices and networking acquisition of industrial data, enable the devices to have interoperability and interoperability, facilitate flexible networking and reconstruction, have low cost and can promote the process of automatic and intelligent upgrading and reconstruction of industrial devices.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, and are within the scope of the invention.

Claims (10)

1. An interconnection and fusion method for heterogeneous industrial networks is characterized by comprising the following steps:
(1) setting a general industrial field networking fusion system, which comprises a reconfigurable control module, a reconfigurable wireless module and a general wired communication module which are mutually connected and communicated, wherein the reconfigurable control module comprises an ARM subsystem, a configurable transceiving communication interface, a DSP subsystem and an FPGA subsystem which are sequentially connected; connecting the general industrial field network integration system into a heterogeneous network of a plurality of industrial field bus devices;
(2) the universal industrial field network connection integration system periodically detects and analyzes the link layer data in the heterogeneous network through the corresponding communication interface; analyzing the current network communication protocol type according to different structural characteristics of link layer data among different protocols, automatically identifying the protocol type by analyzing the frame type, sending a topology discovery data message to the heterogeneous network, and scanning the network topology structure of the heterogeneous network; if the universal industrial field network connection integration system cannot identify the current heterogeneous network, alarming, executing the step (3), and if no alarm exists, executing the step (4);
(3) generating a protocol analysis strategy corresponding to the protocol type of the current heterogeneous network by manually configuring the protocol type of the current heterogeneous network, updating the protocol analysis strategy into the protocol analysis strategy, and executing the step (2) after configuration is completed;
(4) configuring a heterogeneous network management model according to network conversion requirements, generating a network management strategy file corresponding to the heterogeneous network management model, and storing the network management strategy file in a memory of a reconfigurable control module;
(5) loading a corresponding network management strategy file, executing a configuration program by the ARM subsystem according to a converged network management strategy, and downloading a compiled specific configuration bit stream file to an FPGA subsystem of the reconfigurable control module to complete network system reconfiguration; at the moment, the general industrial field networking fusion system processes and forwards the data messages between the heterogeneous networks according to the corresponding network management strategies, and fusion and reconstruction of the heterogeneous networks based on software definition are completed.
2. The method for fusing interconnection of heterogeneous industrial networks according to claim 1, wherein the step (2) of detecting and analyzing the link layer data in the heterogeneous network specifically comprises the following steps:
s21, the general industrial field network integration system builds a protocol identifier on the network link layer by loading a protocol analysis strategy file, and automatically carries out periodic analysis on the data of the network link layer;
s22, determining the communication protocol type of the current network based on a decision tree algorithm according to different structural characteristics of link layer data among different protocols;
s23, loading a reconfiguration configuration file of a corresponding protocol by the universal industrial field networking fusion system to complete the reconfiguration of the FPGA;
s24, sending a topology discovery data message to the heterogeneous network, and scanning a network topology structure of the heterogeneous network;
and S25, sending the network topology structure information of the heterogeneous network to an upper computer or a cloud platform through a configuration transceiving communication interface.
3. The heterogeneous industrial network interconnection fusion method according to claim 1, wherein in the step (3), the heterogeneous network management model is manually configured for the common industrial field networking fusion system according to the network conversion requirement, and a network management policy file corresponding to the heterogeneous network management model is generated, and the method specifically includes the following steps:
s31, setting an upper computer or a cloud platform, and establishing a heterogeneous network management model on the upper computer or the cloud platform according to the requirements of a user;
s32, the heterogeneous network management model comprises the heterogeneous network protocol type, the network topology structure, the data acquisition rule, the data forwarding rule, the data processing process and the like of the general industrial field network connection and fusion system;
s33, forming a network management strategy file by applying a heterogeneous network model modeling format according to the communication requirement in the networking process;
and S34, the upper computer or the cloud platform downloads the network management strategy file into a memory of the reconfigurable control module through a configuration transceiving communication interface.
4. An interconnected convergence system of heterogeneous industrial networks implementing the method according to any one of claims 1 to 3, characterized in that: the reconfigurable control module comprises an ARM subsystem, a configurable transceiving communication interface, a DSP subsystem and an FPGA subsystem which are sequentially connected.
5. The interconnection and fusion system of the heterogeneous industrial networks according to claim 4, wherein the reconfigurable wireless module comprises a reconfigurable main control circuit, a broadband transmitting channel and a receiving channel, wherein the reconfigurable main control circuit comprises an FPGA, a DDS, an ADC, an attenuator, a radio frequency filter, a mixer, a comprehensive frequency module, a reference clock, L NA and PA gain control, a matrix control switch and a CPCI bus.
6. The interconnected fusion system of heterogeneous industrial networks of claim 5 wherein the ARM subsystem is comprised of an ARM microprocessor, an ARM power circuit and ARM reset circuit, an ARM clock circuit, an ARM memory, and an ARM peripheral; the ARM subsystem reconstructs the FPGA subsystem on line through a configuration program, and the on-line dynamic reconstruction of the reconfigurable main control circuit is realized.
7. The interconnection and fusion system of the heterogeneous industrial networks according to claim 4, wherein the DSP subsystem part is composed of a DSP, a DSP power circuit, a DSP clock circuit, a DSP reset circuit and a DSP peripheral; the DSP subsystem mainly processes signals transmitted by the rf module and performs complex operations, which mainly include amplitude, frequency, pulse modulation, Quadrature Phase Shift Keying (QPSK), Quadrature Amplitude Modulation (QAM), general signal processing and algorithm design, convolution, hilbert transform, FFT and other special operations.
8. The interconnection and fusion system of the heterogeneous industrial networks according to claim 4, wherein the FPGA subsystem is composed of an FPGA, an SDRAM, an FPGA download circuit, an FPGA clock circuit, an FPGA reset circuit, an FPGA power supply and an FPGA peripheral; the FPGA subsystem reconstructs a circuit according to a configuration program of the ARM subsystem and is responsible for mutual communication between the DSP subsystem and the ARM subsystem and parallel processing of large-scale tasks.
9. The interconnection and convergence system of the heterogeneous industrial network according to claim 4, wherein the configuration transceiving communication interface is configured to communicate between the universal industrial field networking convergence system and an upper computer or a cloud platform, so that the upper computer or the cloud platform can send the convergence policy file to the ARM subsystem in a software-defined manner, and the ARM subsystem executes a corresponding configuration program according to the convergence policy file.
10. The interconnection and convergence system of the heterogeneous industrial network according to claim 4, wherein the wired communication module comprises a bus communication board, an optical transceiver and a corresponding physical interface; the bus communication board card is linked with the FPGA in the reconfigurable control module through a buffer or a medium independent interface MII interface and comprises an Ethernet transceiver PHY supporting 10BASE-T and 100BASE-TX, a CAN bus communication module, an RS-485 bus interface and an RS-232 bus interface; the optical transceiver is connected with the FPGA in the reconfigurable control module through the SERDES.
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