CN112260944A - Embedded intelligent edge computing gateway based on ARM-Linux system - Google Patents
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Abstract
The invention discloses an embedded intelligent edge computing gateway based on an ARM-Linux system, which comprises a bus interface module, a multi-communication-protocol gateway module, an MQTT client module, an MQTT service module, an embedded database, a lightweight real-time stream rule engine module, an operation and maintenance management service module and a data security module, wherein the multi-communication-protocol gateway module is respectively connected with the bus interface module, the operation and maintenance management service module and the MQTT client module, the MQTT client module is also connected with the operation and maintenance management service module, the embedded database and the MQTT service module, the MQTT service module is also connected with the data security module and the lightweight real-time stream rule engine module, and the lightweight real-time stream rule engine module is also connected with the operation and maintenance management service module.
Description
Technical Field
The invention relates to the technical field of embedded software, in particular to an embedded intelligent edge computing gateway based on an ARM-Linux system.
Background
In order to solve the problems of edge acquisition, protocol analysis, network communication, data delay and the like caused by the rapid development of the internet of things, the cloud computing starts to be switched from single-point service to networking service, and the original independent cloud is switched to the networking cloud, so that the edge computing is gradually started. The edge calculation is an open platform fusing network, calculation, storage and application core capabilities at the edge side of a network close to an object (a data source), so that edge intelligent service is provided nearby, and the key requirements of industry digitization on aspects of agile connection, real-time service, data optimization, application intelligence, safety, privacy protection and the like are met. Edge computing and cloud computing are two important supports for the digital transformation of the industry, and the cooperation of the edge computing and the cloud computing in the aspects of network, business, application, intelligence and the like is beneficial to supporting wider scenes of the digital transformation of the industry and creating greater value. The cloud computing is suitable for non-real-time, long-period data and business decision scenes, and the edge computing plays an irreplaceable role in scenes such as real-time, short-period data and local decision
Edge computing is a key element of industrial 4.0 development, artificial intelligence is deployed at the edge by combining IoT (Internet of things) and edge computing, more intelligent, dynamic and cost-effective manufacturing services are created, and real-time change can be really realized and service operation can be optimized.
The edge computing gateway is used as data acquisition and exchange equipment close to the edge sensor side, and achieves cooperative management together with edge cloud computing. The edge computing gateway becomes an indispensable device for cloud edge collaboration. The edge computing gateway rapidly and efficiently realizes sensing, interaction and control between objects through data acquisition, analysis and processing, is the basis of landing of the Internet of things, and has important functions of effectively reducing network transmission burden, generating optimization decision in real time and the like. The edge computing gateway provides agile connection, analyzes and processes partial data quickly and efficiently, improves the safety performance of the data, reduces the load of a cloud, provides faster response for a user, and meets the requirement at the edge. The edge calculation focuses on all-things intelligent connection, meets the key requirements of industry digitization on connection, real-time, intelligence, data optimization, safety, privacy protection and the like, and becomes an indispensable key element for industry digitization transformation.
The current edge computing application is just started, and with the continuous development of industrial internetworking and Internet of things, the traditional industrial communication gateway can not meet the requirements of low time delay, multiple connections and high reliability on site.
1. The industrial field relates to equipment of a plurality of manufacturers, different standardization organizations, industries and enterprises propose and apply a large number of interfaces and protocols, and in actual integrated application, a large number of gateway equipment or software are adopted to carry out interface adaptation and protocol conversion according to field conditions, so that the engineering cost is increased, the maintenance is difficult, and the problems of multiple faults, low system reliability and the like generally exist.
2. With the continuous development of industrial internet of things, internet, cloud computing and edge computing, the number of communication links between objects and devices on the bottom layer increases exponentially, and high-quality and safe interconnection and intercommunication of mass devices on the edge computing layer in future industrial fields become a necessary trend.
3. In many occasions of industrial fields, high requirements are required on data ductility, stability and safety, and obviously, a logic operation architecture based on cloud computing cannot meet the requirements, and needs to be realized through logic operation marginalization.
4. The industrial field gateways are numerous, and the embedded edge computing gateway with low power consumption, miniaturization and monomer is more suitable for industrial application scenes.
5. The communication gateway is used as a key device for system integration, and remote upgrading, operation monitoring and fault diagnosis of the gateway device are lacked at present.
Disclosure of Invention
In order to solve the defects of the prior art and overcome the problems of complex interface, difficult protocol conversion adaptation, data delay, reliability and power consumption of the prior industrial communication gateway, the invention adopts the following technical scheme:
the embedded intelligent edge computing gateway based on the ARM-Linux system comprises a bus interface module, a multi-communication protocol gateway module, an MQTT client module, an MQTT service module, an embedded database, a lightweight real-time stream rule engine module, an operation and maintenance management service module and a data security module, wherein the multi-communication protocol gateway module is respectively connected with the bus interface module, the operation and maintenance management service module and the MQTT client module;
the bus interface module is used for data interaction of an industrial field bus;
the multi-communication protocol gateway module is used for constructing a communication protocol pool and performing data interaction with external equipment through the bus interface module;
the MQTT client module receives the data of the multi-communication protocol gateway module and sends the data to a corresponding theme of the MQTT service module, and simultaneously subscribes a control command from the corresponding theme in the MQTT service module and forwards the received control command to the multi-communication protocol gateway module;
the MQTT service module is used for performing data access on equipment connected through the MQTT on site while realizing internal data interaction, performing configuration management on management of MQTT themes and related operation parameters through the operation and maintenance management service module, and fixedly establishing a group of themes in the MQTT service module;
the MQTT service module and the MQTT client module carry out short message communication between the equipment through a published/subscribed message push mode, and realize the standardized communication of data of the gateway, the cloud service application platform and the equipment operation and maintenance service platform;
the embedded database realizes the regular storage management of the data according to the management requirements of the configuration module;
the lightweight real-time flow rule engine module is used for carrying out rapid and low-delay real-time flow processing on the data of the multi-communication protocol gateway module;
the operation and maintenance service management module is used for remotely upgrading each module and monitoring operation parameters;
and the data security module is used for realizing data encryption transmission and security identity authentication in the MQTT communication service.
The method effectively solves the problems of diversified industrial field bus communication and large data communication analysis amount, realizes marginalization of communication operation, realizes the communication management of the industrial field multi-bus multi-protocol through the multi-protocol access pool design, realizes rapid data cleaning by arranging a regular flow engine in an embedded gateway, realizes regular forwarding or storage of different data through configuration files, realizes data interaction through constructing an MQTT standard Internet of things communication cloud end, realizes cloud-side data cooperation, realizes data interaction with an equipment cloud operation and maintenance platform by constructing an operation and maintenance management module, realizes the functions of program upgrading, fault alarming, information monitoring and the like, collects and analyzes field multi-bus data in one embedded unit, realizes marginal processing calculation, greatly reduces the load of cloud platform communication and protocol analysis, and simultaneously realizes cloud-side integrated cooperation with the cloud platform through the MQTT, the selective interaction and storage of data are realized through the rule engine and the operation and maintenance management configuration, so that the communication bandwidth of the cloud platform is greatly reduced, the communication efficiency can be greatly improved, and the data delay is reduced.
The multi-communication protocol gateway module comprises an initialization communication configuration module, an acquisition scheduling module, an automatic acquisition time sequence rule module, a communication protocol pool module and a data object mapping module, wherein the initialization communication configuration module realizes the initialization management of a communication driving interface of the interface by receiving the configuration condition of the operation and maintenance management service module on the communication parameters of the field interface, and completes the matching of the communication parameters; the acquisition scheduling module realizes the management of a communication request data priority queue, and a request data frame is automatically acquired from the queue and then sent; the automatic acquisition time sequence rule module realizes the control of the acquisition frequency of different field data contents and adds data to the queue of the acquisition scheduling module according to the frequency; the communication protocol pool module integrates multiple communication protocols, and realizes data receiving, sending and analyzing by scheduling; the data object mapping module maps the data acquired and analyzed by the bus communication protocol to realize data objectification through an address, the mapping address is configured through the operation and maintenance management service module, and the data object mapping module is connected with the MQTT client application module.
An embedded SQLite database is adopted, stored data comprise service data and gateway configuration management parameter data, and a data storage interface is realized in the MQTT client module in a unified mode.
The MQTT service module and the client module construct a Mosquitto lightweight MQTT server, and deploy application on an ARM embedded Linux system.
The theme comprises a real-time data theme, an alarm theme and an operation and maintenance data theme, the real-time data theme is established through configuration, the cloud platform class subscribes data, and cloud-side communication integration is achieved.
The lightweight real-time flow rule engine module is applied to ARM embedded communication gateway equipment by adopting a Kuiper real-time flow component based on SQL.
The lightweight real-time flow rule engine module comprises a real-time flow rule engine, a data flow definition module and a rule configuration module, wherein the data flow definition module is used for dynamically creating a configuration file, completing the definition of data flow, subscribing data from a corresponding theme of the MQTT service module, acquiring source data, specifically processing the data through the rule configuration module, and publishing the processed data to the corresponding theme of the MQTT service module.
The operation and maintenance management service module comprises a WEB communication configuration management unit, a flow rule configuration management unit, a module operation monitoring unit and an operation and maintenance information publishing unit, and is used for realizing rapid gateway configuration service through the WEB communication configuration management unit without additionally installing configuration management software, and configuration parameters are stored in the embedded database; configuration management in WEB is realized through a stream rule configuration management unit; the module operation monitoring unit is used for monitoring the internal operation state of the gateway; the operation and maintenance information publishing unit sends the operation and maintenance monitoring data to the operation and maintenance service cloud platform for unified monitoring and management, and registration management and remote operation monitoring and upgrading services of all gateway devices are achieved through the operation and maintenance service cloud platform.
The operation and maintenance management service module realizes the local configuration management application based on the WEB management program of the BOA.
The operation and maintenance service management module performs configuration management on the interface parameters of the bus interface module, including virtual IP management on the parameters of the heterogeneous bus, and realizes configuration management on a unified IP mode of the heterogeneous bus.
The invention has the advantages and beneficial effects that:
communication access management of different field buses is realized in one gateway device, so that the difficulty of field device integration is greatly reduced; the complexity of platform data access is reduced by realizing a unified interface with the platform through a unified MQTT, and a field complex bus interface and a communication protocol do not need to be considered; data analysis and cleaning rule judgment is realized in the edge gateway, so that the data calculation amount of the cloud platform end is greatly reduced; the edge gateway realizes the regular management and communication of data, realizes the communication of data according to needs, filters invalid data, improves the communication efficiency and can effectively reduce the communication bandwidth; the ARM embedded equipment has the characteristics of low power consumption, realizes energy conservation and consumption reduction while safely operating; the built-in operation and maintenance management module realizes the remote monitoring of the equipment while realizing the well-configured management of the gateway; the storage and breakpoint transmission of data are realized at the edge side of the gateway, and the safety and the effectiveness of the data are ensured.
Drawings
Fig. 1 is a block diagram of the general functional blocks of the embedded edge computing gateway system of the present invention.
Fig. 2 is a schematic diagram of an embedded edge computing gateway interface of the present invention.
Fig. 3 is a functional block diagram of a multi-protocol gateway module according to the present invention.
FIG. 4 is a functional block diagram of a lightweight rules engine module in the present invention.
FIG. 5 is a functional block diagram of an operation and maintenance service management module according to the present invention.
Detailed Description
The invention is described in detail below with reference to the figures and the embodiments. But do not limit the invention to the scope of the described embodiments.
As shown in fig. 1, in the ARM-Linux-based intelligent edge gateway, a core board of a hardware device adopts a Cortex-a9 quad-core 1.4G processor, a 1G memory, 8G EMMC FLASH and an embedded type LINUX3.4.39, and an interface board supports 4 paths of RS485, 2 paths of RS232, 2 paths of CAN, 2 high-speed hundred mega ethernet ports and 1 path of M-BUS communication port; the software function composition comprises: the system comprises a bus interface module, a multi-communication protocol gateway module, an MQTT client application module, an embedded SQLite database, an MQTT service component module, a lightweight real-time stream engine module, an operation and maintenance management service module and a data security module. The edge computing gateway can support remote upgrading of equipment software, containers and application software and simultaneously support breakpoint transmission.
The bus interface module is a driver layer of a communication interface, and corresponding interface drivers are constructed in the embedded LINUX system according to hardware configuration to realize data interaction of software and hardware. And the subsequent communication protocol pool gateway module realizes data interaction of other equipment in the industrial field by calling the corresponding drive.
As shown in fig. 2, the hardware interface of the intelligent edge gateway based on ARM-Linux includes: 4 RS485 bus interfaces; 2 paths of COM interfaces of RS232 (wherein one path is a DEBUG interface); 2-path CAN bus interface; 1 path of M-BUS interface; a 2-way 100M Ethernet interface; and the USB interface and the TF memory card interface are also included. The industrial field device is accessed to the corresponding communication interface of the intelligent edge gateway device through the field bus to realize the network communication function. And the configuration parameters of the RS485, RS232, CAN and M-BUS heterogeneous BUS are virtualized into IP addresses and port numbers to realize configuration management.
As shown in fig. 3, the multi-communication protocol gateway module implements the construction of a multi-communication protocol pool, implements data communication and data analysis functions of different protocols of the fieldbus, and currently integrates protocols such as Modbus-RTU, Modbus-ASCII, Modbus-TCP, OPC ua, OPC da, Bacnet-RTSP, Bacnet-TCP, CDT101, CDT104, DLT645-2007, Profinet, CJ/T-188, LWM2M, COAP, loranmqtt, and the like, according to hardware interface support conditions, and if extension protocols are involved subsequently, the addition of the protocols can be implemented according to an interface mode.
The multi-communication protocol gateway module comprises: the system comprises an initialization communication configuration module, an acquisition scheduling management module, an automatic acquisition timing sequence rule management module, a communication protocol pool module and a data object mapping module, wherein the initialization communication configuration module is used for realizing the initialization management of a communication driving interface of the interface by receiving the configuration condition of an operation and maintenance management service module on the communication parameters of a field interface and completing the matching of the communication parameters; the acquisition scheduling management module realizes the management of a communication request data priority queue, and a request data frame is automatically acquired from the queue and then sent; the automatic acquisition time sequence rule management module realizes the control of the acquisition frequency of different field data contents and adds data to the queue of the acquisition scheduling management module according to the frequency. The communication protocol pool module integrates multiple communication protocols, and realizes data receiving, sending and analyzing by scheduling; the data object mapping module maps the data acquired and analyzed by the bus communication protocol to realize data objectification through an address, the mapping address is configured through the front-end operation and maintenance management service module, and the data object mapping module is connected with the MQTT client application module.
An MQTT client engine is integrated in the MQTT client application module, the module receives data objectified by the multi-communication protocol gateway module, sends the data to a corresponding theme of the MQTT server through the MQTT client engine, subscribes a control command from the corresponding theme in the MQTT service through the MQTT client engine, and forwards the received control command to the multi-communication protocol gateway module. And the MQTT client application module and the service module perform data interaction through a Json format.
The embedded SQLite database module realizes that a lightweight SQLite database management module is introduced into the embedded gateway equipment and is used for storing data, and the embedded SQLite database module comprises the following components: the storage of configuration parameters, historical data and alarm records, the module realizes the regular clearing or covering of data through the configuration parameters, the control of database capacity is realized, and the storage interfaces of data are realized in an MQTT client application module in a unified way.
The MQTT service component module transplants a lightweight Mosquitto server into an embedded edge gateway to realize internal data interaction, simultaneously performs data access on equipment such as a field LORAWAN and the like connected through MQTT, performs configuration management on management and related operation parameters of an MQTT theme through a front-end operation and maintenance management service module, and fixedly establishes a real-time data theme, an alarm theme and an operation and maintenance data theme in the MQTT service component module. The user can also establish related topics through configuration, for example, a real-time data topic can be established, so that the cloud platform class subscribes data, and cloud-side communication integration is realized.
As shown in fig. 4, the lightweight real-time stream engine module displays cleaning, sorting and rule judgment of data, introduces a lightweight SQL stream rule engine based on an ARM embedded Linux system, dynamically creates an SQL configuration file through a Kuiper SQL data stream definition management module, completes definition of data streams, subscribes data from a corresponding theme of an MQTT service component module, obtains source data, performs specific aggregation, classification, anomaly detection, alarm and other processing on the data through the Kuiper SQL rule configuration management module, and publishes the processed data to the corresponding theme of the MQTT service module. The abnormal information includes but is not limited to the occupancy rate of the CPU of the device exceeding the limit, the memory of the device exceeding the limit, the storage space of the device being insufficient, the device being reset, etc.; alarm judgment of a threshold value is carried out on specific data, and an alarm data object is formed and stored and issued to a theme needing MQTT.
As shown in fig. 5, the operation and maintenance management service module completes configuration management and internal operation monitoring of the edge computing gateway application, and integrates a BOA WEB service component inside, so that rapid configuration service of the gateway can be realized through WEB communication configuration management without additionally installing configuration management software, and configuration parameters are stored in an SQLITE database; the definition and rule configuration of the data stream are carried out at the front end of the lightweight real-time stream engine module, and the configuration management in WEB can also be realized through stream rule configuration management; the module operation monitoring unit is used for monitoring the internal operation state of the edge computing gateway, including the operation state of a communication port, data flow, communication fault calculation, network state, memory capacity, database capacity, the number of MQTT clients, state and flow and the like. And the operation and maintenance information publishing unit sends the operation and maintenance monitoring data to the operation and maintenance service cloud platform for unified monitoring management.
The data security module mainly realizes the security management of the data communication between the embedded intelligent edge gateway equipment and the cloud platform, and realizes SSL/TSL data encryption transmission and security identity authentication through the security configuration of MQTT service.
In summary, the invention provides a functional architecture of an intelligent edge computing gateway based on ARM embedded Linux, which can effectively solve the problems of diversified industrial field bus communication and large data communication analysis amount and realize the marginalization of communication operation. The design of a multi-protocol access pool realizes the communication management of multiple buses and multiple protocols in an industrial field, the rapid data cleaning is realized by deploying a rule flow engine in an embedded gateway, and different data are transmitted or stored in a rule mode through an SQL configuration file; data interaction is realized by constructing an MQTT standard Internet of things communication through cloud end, and cloud-side data cooperation is realized; an operation and maintenance management module is constructed to realize data interaction with an equipment operation and maintenance cloud platform, and functions of program upgrading, fault alarming, information monitoring and the like are realized; the field multi-bus data is collected and analyzed in one embedded unit, edge processing calculation is achieved, loads of cloud platform communication and protocol analysis are greatly reduced, meanwhile, cloud-edge integrated cooperation is achieved through MQTT and a cloud platform, selective interaction and storage of data are achieved through operation and maintenance management configuration through a rule engine, bandwidth of communication through the cloud platform is greatly reduced, communication efficiency can be greatly improved, and data delay is reduced.
The present invention is not limited to the above-described embodiments, and any changes in shape or structure thereof fall within the scope of the present invention. The scope of the present invention is defined by the appended claims, and those skilled in the art can make various changes or modifications to the embodiments without departing from the principle and spirit of the present invention, and such changes and modifications fall within the scope of the present invention.
Claims (10)
1. The embedded intelligent edge computing gateway based on the ARM-Linux system comprises a bus interface module and is characterized by further comprising a multi-communication protocol gateway module, an MQTT client module, an MQTT service module, an embedded database, a lightweight real-time stream rule engine module, an operation and maintenance management service module and a data security module, wherein the multi-communication protocol gateway module is respectively connected with the bus interface module, the operation and maintenance management service module and the MQTT client module;
the bus interface module is used for data interaction of an industrial field bus;
the multi-communication protocol gateway module is used for constructing a communication protocol pool and performing data interaction with external equipment through the bus interface module;
the MQTT client module receives the data of the multi-communication protocol gateway module and sends the data to a corresponding theme of the MQTT service module, and simultaneously subscribes a control command from the corresponding theme in the MQTT service module and forwards the received control command to the multi-communication protocol gateway module;
the MQTT service module is used for performing data access on equipment connected through the MQTT on site while realizing internal data interaction, performing configuration management on management of MQTT themes and related operation parameters through the operation and maintenance management service module, and fixedly establishing a group of themes in the MQTT service module;
the embedded database realizes the regular storage management of the data according to the management requirements of the configuration module;
the lightweight real-time flow rule engine module is used for carrying out real-time flow processing on the data of the multi-communication protocol gateway module;
the operation and maintenance service management module is used for remotely upgrading each module and monitoring operation parameters;
and the data security module is used for realizing data encryption transmission and security identity authentication in the MQTT communication service.
2. The embedded intelligent edge computing gateway based on the ARM-Linux system as claimed in claim 1, wherein the multi-communication protocol gateway module comprises an initialization communication configuration module, an acquisition scheduling module, an automatic acquisition timing rule module, a communication protocol pool module, and a data object mapping module, wherein the initialization communication configuration module realizes communication of interfaces by receiving configuration of the operation and maintenance management service module on field interface communication parameters, drives initialization management of the interfaces, and completes matching of the communication parameters; the acquisition scheduling module realizes the management of a communication request data priority queue, and a request data frame is automatically acquired from the queue and then sent; the automatic acquisition time sequence rule module realizes the control of the acquisition frequency of different field data contents and adds data to the queue of the acquisition scheduling module according to the frequency; the communication protocol pool module integrates multiple communication protocols, and realizes data receiving, sending and analyzing by scheduling; the data object mapping module maps the data acquired and analyzed by the bus communication protocol to realize data objectification through an address, the mapping address is configured through the operation and maintenance management service module, and the data object mapping module is connected with the MQTT client application module.
3. The embedded intelligent edge computing gateway based on the ARM-Linux system as claimed in claim 1, wherein an embedded SQLite database is adopted, the stored data comprises service data and gateway configuration management parameter data, and the data storage interface is unified with the MQTT client module.
4. The embedded intelligent edge computing gateway based on the ARM-Linux system as recited in claim 1, wherein the MQTT service module and the client module construct a Mosquitto lightweight MQTT server, deploying applications on the ARM embedded Linux system.
5. The embedded intelligent edge computing gateway based on the ARM-Linux system as claimed in claim 1, wherein the theme comprises a real-time data theme, an alarm theme and an operation and maintenance data theme, the real-time data theme is established through configuration, a cloud platform class is made to subscribe data, and cloud-side communication integration is achieved.
6. The embedded intelligent edge computing gateway based on ARM-Linux system of claim 1, wherein the lightweight real-time flow rules engine module employs a SQL-based Kuiper real-time flow component to deploy applications on ARM embedded communication gateway devices.
7. The embedded intelligent edge computing gateway based on ARM-Linux system of claim 1, wherein the lightweight real-time stream rule engine module comprises a real-time stream rule engine, a data stream definition module and a rule configuration module, the data stream definition module is used for dynamically creating a configuration file, completing definition of data stream, subscribing data from the corresponding theme of the MQTT service module, obtaining source data, performing specific processing on data through the rule configuration module, and publishing the processed data to the corresponding theme of the MQTT service module.
8. The embedded intelligent edge computing gateway based on the ARM-Linux system as claimed in claim 1, wherein the operation and maintenance management service module comprises a WEB communication configuration management unit, a flow rule configuration management unit, a module operation monitoring unit and an operation and maintenance information publishing unit, the WEB communication configuration management unit is used for realizing rapid gateway configuration service, and configuration parameters are stored in the embedded database; configuration management in WEB is realized through a stream rule configuration management unit; the module operation monitoring unit is used for monitoring the internal operation state of the gateway; and the operation and maintenance information publishing unit sends the operation and maintenance monitoring data to the operation and maintenance service cloud platform.
9. The embedded intelligent edge computing gateway based on ARM-Linux system of claim 1, wherein the operation and maintenance management service module, BOA-based WEB management program, implements a localized configuration management application.
10. The embedded intelligent edge computing gateway based on ARM-Linux system of claim 1, wherein the operation and maintenance service management module performs configuration management on the interface parameters of the bus interface module, including virtual IP management on the parameters of the heterogeneous bus, to implement configuration management on the unified IP mode of the heterogeneous bus.
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