CN111478799B - Heterogeneous industrial network interconnection method based on dynamic reconfiguration and wireless module - Google Patents

Heterogeneous industrial network interconnection method based on dynamic reconfiguration and wireless module Download PDF

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CN111478799B
CN111478799B CN202010196131.7A CN202010196131A CN111478799B CN 111478799 B CN111478799 B CN 111478799B CN 202010196131 A CN202010196131 A CN 202010196131A CN 111478799 B CN111478799 B CN 111478799B
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CN111478799A (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
    • H04L41/06—Management of faults, events, alarms or notifications
    • H04L41/0631—Management of faults, events, alarms or notifications using root cause analysis; using analysis of correlation between notifications, alarms or events based on decision criteria, e.g. hierarchy, tree or time analysis
    • 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
    • H04L41/0803—Configuration setting
    • H04L41/0813—Configuration setting characterised by the conditions triggering a change of settings
    • 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
    • H04L41/0803—Configuration setting
    • H04L41/0823—Configuration setting characterised by the purposes of a change of settings, e.g. optimising configuration for enhancing reliability
    • 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
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    • 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
    • H04L41/14—Network analysis or design
    • H04L41/145—Network analysis or design involving simulating, designing, planning or modelling of a network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/01—Protocols
    • H04L67/02—Protocols based on web technology, e.g. hypertext transfer protocol [HTTP]
    • H04L67/025—Protocols based on web technology, e.g. hypertext transfer protocol [HTTP] for remote control or remote monitoring of applications
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/01—Protocols
    • H04L67/06—Protocols specially adapted for file transfer, e.g. file transfer protocol [FTP]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
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    • H04L67/30—Profiles
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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    • Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
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Abstract

The invention discloses a reconfigurable wireless module based on dynamic reconfiguration, which is characterized by comprising a reconfigurable main control circuit, a broadband transmitting channel and a receiving channel; the system is connected with a reconfigurable control module and a universal wired module and is in interactive communication with the reconfigurable control module and the universal wired module to form a universal industrial field networking fusion system based on dynamic reconfiguration. The invention also discloses a heterogeneous industrial network interconnection method adopting the module, which comprises the following steps: setting a general industrial field network connection integration system, detecting and analyzing link layer data in a heterogeneous network, and generating a network management strategy file; 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 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

Heterogeneous industrial network interconnection method based on dynamic reconfiguration and wireless module
Technical Field
The invention relates to the technical field of industrial equipment field communication, in particular to a heterogeneous industrial network interconnection method and a wireless module based on dynamic reconfiguration, which are a general industrial networking system based on software definition and a general implementation method for reconfiguring different communication modes and can be used for data acquisition 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 s and early 90 s of the 20 th century and is used as a field intelligent device interconnection communication network 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 full distribution 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 powerful and influential companies in the world have developed fieldbus technology and products to varying degrees. 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 by a DCS is broken through, and on the other hand, the defects caused by a closed system are overcome by adopting a solution scheme based on publicization and standardization; 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 mode, the protocol and the interface adopted by the existing industrial device are complicated, and a plurality of communication protocols and interfaces cannot be compatible, coexisted, connected and communicated.
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 (device bus) 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 chinese patent application 201711351078.8 discloses a heterogeneous network interconnection and intercommunication fusion system and method, the heterogeneous network interconnection and intercommunication fusion system comprises: the gateway fusion layer is used for realizing interconnection between the WSN and the wireless access network based on the Zigbee; a network adaptation layer added in the network layer for uniformly managing the network interface of the wireless access network; the system specifically comprises a core processing module; the core processing module is respectively connected with the Zigbee module, the touch display screen block, the WCDMA module and the WLAN module in a wireless mode. The invention adopts the embedded technology to reduce the power consumption of the HWG, thereby meeting the low power consumption requirement of industrial field equipment. The sensing information is uploaded to the Internet through the HWG through a wireless access network, and the sharing of the sensing information is realized. But it only solves the network convergence and access problems of single heterogeneous industrial field devices, but does not solve the network convergence and access problems of heterogeneous industrial field bus devices, and is also inconvenient for reconstructing network systems.
In order to solve the above problems, it is very necessary to research a universal network connection and fusion method based on a dynamically reconfigurable wireless module and a heterogeneous industrial field bus, which supports access of various devices in different ways, realizes interconnection and intercommunication among heterogeneous devices and networking acquisition of industrial data, enables devices to have interoperability and interoperability, facilitates flexible networking and reconfiguration, and promotes 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 reconfigurable wireless module based on dynamic reconfiguration and a method for interconnecting heterogeneous industrial field networks by using the same, so that the interconnection and intercommunication fusion between equipment and between the equipment and a 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:
a reconfigurable wireless module based on dynamic reconfiguration is characterized by comprising a reconfigurable main control circuit, a broadband transmitting channel and a receiving channel; the system is connected with a reconfigurable control module and is in interactive communication, so that a general industrial field networking fusion system based on dynamic reconfiguration is formed.
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, gain control (LNA and PA), a matrix control switch, a CPCI bus and the like.
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 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.
A heterogeneous industrial network interconnection method adopting the reconfigurable wireless module is characterized by comprising the following steps:
(1) Setting a general industrial field networking fusion system, which comprises a reconfigurable control module and a reconfigurable wireless 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 networking fusion 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 general industrial field network-based 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), link layer data in the heterogeneous network is detected and analyzed, which specifically comprises the following steps:
s21, the general industrial field networking fusion system builds 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;
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, the general industrial field network integration system loads a reconfiguration configuration file of a corresponding protocol 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 heterogeneous network management model is manually configured for the general industrial field networking fusion system according to the network conversion requirement, and a network management strategy file corresponding to the heterogeneous network management model is generated, and the method 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 aspects of a heterogeneous network protocol type, a network topology structure, a data acquisition rule, a data forwarding rule, a 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 invention has the following beneficial effects and advantages:
1. the invention provides a reconfigurable wireless module based on dynamic reconfiguration and a network interconnection method, wherein a reconfigurable technology is applied to heterogeneous network fusion of industrial field bus equipment, and a universal industrial field networking fusion 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 universal industrial field networking integration system is adopted, and the current network protocol type is identified 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 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 module and the network interconnection method provided by the invention are based on a uniform hardware architecture, and only need to establish a corresponding heterogeneous network management model 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 the 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 the reliability of the universal industrial field network interconnection fusion system can be greatly improved.
4. The module and the method provided by the invention can enable the field bus equipment to complete intelligent and digital upgrading with low cost, thereby 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 block diagram of the reconfigurable main control circuit of the present invention;
FIG. 3 is a schematic diagram illustrating an implementation flow of a heterogeneous network protocol identification method according to the present invention;
fig. 4 is a schematic diagram of an implementation process of the heterogeneous industrial network interconnection method.
Fig. 5 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 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. 1-5, a reconfigurable wireless module based on dynamic reconfiguration according to an embodiment of the present invention includes a reconfigurable master control circuit, a wideband transmitting channel, and a receiving channel; the system is connected with a reconfigurable control module and is in interactive communication, so that a general industrial field networking fusion system based on dynamic reconfiguration is formed.
The reconfigurable wireless module comprises a broadband transmitting channel and a receiving channel, realizes full duplex FDD/TDD by adopting a multi-band division mode, and realizes the coverage of 2 MHz-8 GHz frequency bands by three frequency bands of 2 MHz-2 GHz, 2 GHz-4 GHz and 4 GHz-8 GHz respectively; the main control circuit part of the reconfigurable wireless module comprises an FPGA, a DDS, an ADC, an attenuator, a radio frequency filter, a mixer, a comprehensive frequency module, a reference clock, gain control (LNA and PA), a matrix control switch and a CPCI bus. The control circuit is a key part of the whole reconfigurable wireless module, the circuit takes the FPGA as a core, the FPGA controls the CPCI standard bus interface to communicate with the outside, a CPCI protocol is realized, the reconfigurable control module accesses the SRAM in the FPGA through the CPCI controller in the FPGA, and the control of the radio frequency function of the slave equipment is realized through a control protocol which is stipulated in advance; the FPGA controls the DDS to generate a baseband calibration signal with specified frequency (the frequency range of frequency configuration is 2 MHz-8 GHz); controlling the ADC to complete the acquisition control and processing of the calibration signal of the receiving channel, and outputting the data acquired by the ADC through a CPCI bus; controlling a frequency synthesizer to generate a required local oscillation signal; controlling an attenuator to realize attenuation of 0-60 dB, wherein the stepping value is 1dB; the control range of the gain control is more than or equal to 60dB; the matrix control switch comprises a multi-band mode switching control and a full duplex FDD/TDD mode switching control; the radio frequency filter configures a radio frequency filter selection mode according to the multi-band switching control.
Referring to fig. 2, the reconfigurable main control circuit is composed of an FPGA, a frequency configuration, an attenuator, a gain control, a logic switch control, a PLL (phase locked loop), a power module, a FLASH, a radio frequency filter, an intermediate frequency filter, a CPCI and the like.
The reconfigurable control module comprises an ARM subsystem, a configurable transceiving communication interface, a DSP subsystem and an FPGA subsystem which are connected in sequence.
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 definition mode, and the ARM subsystem can execute a corresponding configuration program according to the integration strategy file.
A heterogeneous industrial network interconnection method adopting the reconfigurable wireless module comprises the following steps:
(1) Setting a universal industrial field networking fusion system, which comprises a reconfigurable control module and a reconfigurable wireless 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 networking fusion 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 the 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), link layer data in the heterogeneous network is detected and analyzed, which specifically comprises the following steps:
s21, the general industrial field network integration system builds 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;
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, the universal industrial field networking fusion system loads a reconfiguration configuration file of a corresponding protocol 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 aspects of a heterogeneous network protocol type, a network topology structure, a data acquisition rule, a data forwarding rule, a 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 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. This Reconfiguration mode based on FPGA can be implemented by using a design concept 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 fig. 1, the system module composition structure of the general heterogeneous industrial field networking fusion system provided in the present invention includes a reconfigurable control module and a reconfigurable wireless module. The system is a general industrial field networking fusion system based on software definition, and specifically comprises a reconfigurable control module and a reconfigurable wireless 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 value epsilon;
the process is as follows: the function TreeGenerator (D, A).
STEP1: entropy of node a: ent (D, a)
STEP2: entropy of set D: ent (D)
STEP3: calculating node information gain: gain (D, a) = Ent (D) -Ent (D, a)
STEP4 node a divides set D into { D 1 ,D 2 ,...D v }：
Figure BDA0002417679780000121
STEP5 node information gain ratio:
Figure BDA0002417679780000122
referring to fig. 2, a schematic diagram of a heterogeneous network protocol identification process 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 an 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.
In the embodiment of the present application, the implementation process of the heterogeneous industrial network interconnection method based on software definition provided in the embodiment of the present application is described by taking the multiple heterogeneous industrial network interconnection applications shown in fig. 3 as examples, 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. 4 (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; connecting a target servo motor with a general heterogeneous industrial field networking fusion system through a CAN bus interface of an industrial field bus; the industrial sensor is connected with the broadband wireless radio frequency module through the Lora; the general industrial field network connection integration system needs to forward control data sent by an EtherCAT main station to a target servo motor through a CAN bus, meanwhile, regularly reads data sensed by an industrial sensor, and sends the data to a northbound information system through a passive optical network.
Referring to fig. 4 (b), the application scenario specifically includes the following steps:
(1) Connecting the general heterogeneous industrial field network connection integration system into a corresponding industrial field heterogeneous network; specifically include through passive optical network connection north to information system, through industry ethernet connection etherCAT main website, through CAN bus connection target servo motor, connect industrial sensor through Lora.
(2) And (4) identifying the heterogeneous network protocol, and if automatic identification cannot be carried out, manually configuring.
(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) 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. In the application scenario, the data message of the industrial Ethernet and the data message on the CAN bus are decoded and forwarded mutually, so that the EtherCAT master station drives the target servo motor; data sensed by an industrial sensor are periodically read through Lora, and the data are sent to a northbound information system through a passive optical network; and determining configuration parameters such as time synchronization, priority, qoS guarantee and the like.
(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 fig. 4, the universal heterogeneous industrial field networking convergence system provided by the invention can be used as an industrial network integration device at field level and 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 wireless module based on dynamic reconfiguration and the method for interconnecting heterogeneous industrial field bus networks 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 reconfiguration, 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 these embodiments are therefore considered to be within the scope of the invention.

Claims (10)

1. A heterogeneous industrial network interconnection method is characterized by comprising the following steps:
(1) Setting a general industrial field networking fusion system, which comprises a reconfigurable control module and a reconfigurable wireless 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 the 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 heterogeneous industrial network interconnection method according to claim 1, wherein the detecting and analyzing of the link layer data in the heterogeneous network in step (2) specifically includes the following steps:
s21, the general industrial field network integration system builds 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;
s22, determining the communication protocol type of the current network based on a decision tree algorithm according to different structural features of link layer data among different protocols;
s23, the general industrial field network integration system loads a reconfiguration configuration file of a corresponding protocol 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 interconnection method of the heterogeneous industrial networks according to claim 1, wherein in the step (3), the heterogeneous network management model is manually configured for the general industrial field internetworking fusion system according to network conversion requirements, and a network management policy file corresponding to the heterogeneous network management model is generated, and 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 a heterogeneous network protocol type, a network topology structure, a data acquisition rule, a data forwarding rule and a data processing process 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. A reconfigurable wireless module based on dynamic reconfiguration for implementing the heterogeneous industrial network interconnection method of any one of claims 1 to 3, which is characterized by consisting of a reconfigurable main control circuit, a broadband transmitting channel and a receiving channel; the system is connected with a reconfigurable control module and is in interactive communication, so that a general industrial field networking fusion system based on dynamic reconfiguration is formed.
5. The reconfigurable wireless module according to claim 4, wherein the reconfigurable master control circuit comprises FPGA, DDS, ADC, attenuator, RF filter, mixer, integrated frequency module, reference clock, LNA and PA gain control, matrix control switch, and CPCI bus.
6. The reconfigurable wireless module based on dynamic reconfiguration of claim 4, wherein the reconfigurable control module comprises an ARM subsystem, a configurable transceiving communication interface, a DSP subsystem, and an FPGA subsystem, which are connected in sequence.
7. The reconfigurable wireless module based on dynamic reconfiguration of claim 6, wherein the ARM subsystem is composed 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.
8. The reconfigurable wireless module based on dynamic reconfiguration according to claim 6, 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, and FFT operations.
9. The reconfigurable wireless module based on dynamic reconfiguration according to claim 6, wherein the FPGA subsystem part 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.
10. The reconfigurable wireless module based on dynamic reconfiguration of claim 6, wherein the configuration transceiving communication interface is used for communication 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.
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