CN117931297A - OPC UA-based method for carrying out information fusion modeling on industrial control equipment - Google Patents
OPC UA-based method for carrying out information fusion modeling on industrial control equipment Download PDFInfo
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Abstract
The invention discloses a method for carrying out information fusion modeling on industrial control equipment based on OPC UA, which comprises the following steps: constructing a device information model logic mapping relation based on the device information of the industrial control system; determining an adapter model structure based on OPC UA standards according to the logical mapping relation of the equipment information model, and constructing a general adapter and a special adapter based on the adapter model structure; and combining the universal adapter and the special adapter to construct an information data model of the corresponding industrial control system. Through the adapter structure which is more efficient, stable and compatible, unified modeling and standardized processing of the information of the industrial control field device are realized. A reliable, efficient and flexible solution is provided for information interaction and data control in the field of industrial control, so that the efficiency and reliability of information interaction and sharing among industrial field devices are improved.
Description
Technical Field
The invention relates to the field of industrial automation, in particular to a method for carrying out information fusion modeling on industrial control equipment based on OPC UA.
Background
In an industrial system, the most important marks are interconnection and intercommunication among industrial control equipment and interaction among equipment based on semantic understanding in each link of factory production, the factory equipment is connected with each other through Ethernet, and a control layer sends data to an upper layer application based on a standard information model, so that detection and optimization of a production flow are realized, and the optimal productivity efficiency is achieved.
In the field of industrial control, the interaction modes adopted by equipment and instruments are various. There are different classes of devices including, but not limited to, control systems DCS/SIS/PLC, smart meters, and dynamic or static mechanical devices. In order to improve the information interaction efficiency between the field device and the instrument, an information model modeling method using industry standards is one of the mainstream schemes at present. Industry standards such as OPC UA use a model modeling manner to define an information transfer format between a device and an instrument, so that the information transfer format can exert excellent compatibility, stability and expandability in an application scene.
However, due to the diversity and differentiation of field devices and meters, the information models involved with different types of devices and meters are also different. In the practical application scenario, it is required to construct corresponding adapters for different types of devices, so that the adapters can meet the specification of a standard information model, and interaction and sharing of information among a plurality of devices are realized. The standardization of information interaction is difficult, and the requirements of information transfer between different devices are usually met by writing corresponding adapters. The current adapter construction is too complex, so that not only is the information model built by deep research on equipment needed, but also an adapter structure with expandability is needed to be designed, the workload is large, the period is long, and the adapter is difficult to be quickly suitable for various industrial control field equipment. Meanwhile, the adapter in the prior art has compatibility and stability problems, and can not well meet the requirements of information interaction and sharing.
Disclosure of Invention
In order to overcome the defects of the technology, the invention provides a method for carrying out information fusion modeling on industrial control equipment based on OPC UA, designs a more efficient, stable and compatible adapter structure, and realizes unified modeling and standardized processing on industrial control field equipment information. A reliable, efficient and flexible solution is provided for information interaction and data control in the field of industrial control, so that the efficiency and reliability of information interaction and sharing among industrial field devices are improved.
The technical scheme adopted for overcoming the technical problems is as follows: the invention provides a method for carrying out information fusion modeling on industrial control equipment based on OPC UA, which comprises the following steps: constructing a device information model logic mapping relation based on the device information of the industrial control system; determining an adapter model structure according to the equipment information model logic mapping relation based on the OPC UA standard; constructing a general adapter and a special adapter based on the adapter model structure; and combining the universal adapter and the special adapter to construct an information data model of the corresponding industrial control system.
Further, the adapter model structure at least comprises an interface, and the adapter interface at least comprises a data input interface, a data output interface and a service interface, wherein the data input interface is used for receiving data and state information generated by equipment and converting the data and state information into an OPC UA standardized data model; the data output interface is used for transmitting the processed data to other adapters or devices; the service interface provides a globally unique identifier for subscribing and publishing services to enable subscribing and querying device status and data flow information.
Further, the construction of the universal adapter based on the adapter model structure specifically comprises the steps of selecting a universal basic information model related to industrial control equipment in the OPC UA standard; acquiring equipment and instrument information, and adapting the equipment and instrument information to a general basic information model and deriving according to the characteristics of the equipment and the instrument; performing coding processing on the derived adaptive universal basic information model, and compiling and outputting a universal dynamic loading module; and generating an OPC UA standardized service based on the universal dynamic loading module, thereby generating a universal adapter.
Further, the construction of the special adapter based on the adapter model structure specifically comprises the steps of selecting a general basic information model related to industrial control equipment in the OPC UA standard; acquiring equipment and instrument information, and creating a special model based on a general basic information model according to the characteristics of the equipment and the instrument; adapting the equipment and instrument information to a special model and deriving; coding the derived special model, and compiling and outputting a special dynamic loading module; and generating OPC UA service, and loading a special dynamic loading module so as to generate a special adapter.
Furthermore, the universal adapter performs standardization and generalization processing on information of different devices and meters based on OPC UA standard service so as to perform message transmission and information interaction.
Further, the combination universal adapter and special adapter specifically includes: the special adapter is used as a sub-component of the universal adapter, and is independent of the universal adapter and the special adapter, and is communicated with one or a combination of a plurality of or all of the OPC UA servers after being interacted with the universal adapter.
Further, the special adapter is used as a subassembly of the universal adapter, and specifically comprises: the universal adapter dynamically loads a plurality of special dynamic loading modules so as to load model information of the special adapter to the universal adapter; the universal adapter performs standardized processing on the converted information based on OPC UA standards; and the universal adapter communicates with the OPC UA server based on the standardized information.
Furthermore, the special adapter is independent of the universal adapter, and the special adapter converts information of the specific equipment or instrument based on the OPC UA protocol and transmits the converted information to the OPC UA server.
Further, the special adapter and the universal adapter interact and then communicate with the OPC UA server, which specifically includes: the universal adapter traverses the address space of the special adapter through the OPC UA client to map the address space of the universal adapter to nodes in the address space of the universal adapter, so that the information agent of the special adapter is realized; the universal adapter standardizes and generalizes the information of all devices and meters; the universal adapter transmits the processed data to the OPC UA server.
The beneficial effects of the invention are as follows:
1. The information of different types of equipment is standardized through a universal adapter, so that the information can be adapted to an OPC UA universal model, and the integration and management of the equipment information are realized;
2. the new equipment is accessed into the system, the data model is multiplexed or the attribute is added to the model, the workload is greatly reduced, and the engineering efficiency is improved;
3. the unified modeling of the equipment promotes the intelligent management of the equipment of the upper-layer system, and is convenient for the optimization of the whole industrial process;
4. different application forms of a general adapter and a special adapter are adopted for different network application environments.
Drawings
FIG. 1 is a flowchart of a method for performing industrial control equipment information fusion modeling based on OPC UA in an embodiment of the invention;
FIG. 2 is a logical mapping relationship of an equipment information model according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of an equipment information model according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of information fusion combining a general adapter and a special adapter according to an embodiment of the present invention.
Detailed Description
For a further understanding of the present invention, some terms mentioned in the present invention will be explained first.
OPC UA: the open production control and unified architecture is a widely used communication protocol in which each device and system is abstracted into an object with its own properties, methods and events. By reading and writing the attributes of the objects, calling the methods of the objects, and listening for the events of the objects, the devices and systems can perform data exchange and control operations.
An adapter: a component for interfacing with different physical devices, sensors and systems and converting data of those devices or systems into a unified OPC UA format.
UA Modeler: modeling tools for creating and analyzing complex systems assist users in graphically designing and simulating various systems.
OPC UA Aggregation: data aggregation, the data of different OPC servers or other data sources are aggregated into a single data source so that one OPC client or other client can access secondary data through a single universal interface.
The invention will now be described in further detail with reference to the drawings and the specific examples, which are given by way of illustration only and are not intended to limit the scope of the invention, in order to facilitate a better understanding of the invention to those skilled in the art. As shown in fig. 1, a flowchart of a method for performing industrial control equipment information fusion modeling based on OPC UA according to an embodiment of the present invention includes the following steps:
s1, constructing a logical mapping relation of the equipment information model based on the equipment information of the industrial control system.
The field devices of the current flow industrial control system are mainly divided into the following categories:
(1) The site instrument, the valve, the control card and the I/O card are generally connected to the DCS control system through buses such as Hart, FF, profibus, modbus.
(2) The large-scale unit equipment, including compressors, reciprocators, etc., is accessed to the control system via TSI (proprietary control protocol).
③ The electric equipment and the single device equipment are used for on-site small-sized independent control, and are accessed into control systems such as SIS, PLC and the like through protocols such as Profibus and the like
④ And the rotating equipment such as a pump, a motor and the like is accessed to the control system through a IIOT gateway by a wireless sensor.
According to the application scene, in order to create a unified control system information model, so that the interoperability with data of an upper system is improved, the contained information needs to be summarized in two major categories and identified interoperation events.
The interoperation event can be in a Method mode of OPC UA, and the UA client can call a Method provided by the server, so that the Method is not only read-only to a service address space, but also can realize writing operation.
The field equipment is divided into discrete equipment and combined equipment through analysis, and is summarized into three major categories of field instruments, system modules and devices, and the three major categories are mapped into two categories of production processes, device models and instrument control models. As shown in fig. 2, the map of the field instrument class is an instrument control model, which includes a control system hardware model, an instrument model, and the like, and models related to the instrument and the control system. Two broad classes of system modules and devices map into production process and device models, including control system location number (Tag) models and device models, and the like, and models related to production processes, industrial field processes, and production devices.
The industrial control field physical space is mapped into a control system model space. The production process and device model may be considered generic adapter information types and the field instrument, system module, device may be a special adapter information type derived from two generic adapter information types.
S2, determining an adapter model structure according to the logical mapping relation of the equipment information model based on the OPC UA standard.
Wherein the adapter model structure is determined, namely, a mode of expressing the OPC UA standard by adopting a certain language is determined.
The structure of the adapter comprises two layers of a general adapter structure and a special adapter structure. The universal adapter structure is suitable for most equipment and meters, and the special adapter structure is used for personalized modeling of various special equipment and meters.
In one embodiment of the invention, shown in FIG. 3, an adapter model is schematically depicted. At least includes a mandatory attribute, a hardware type Model, a Manufacturer, a hardware version HardwareRevision, a software version SofewareRevision, a serial number SerialNumber, a device version number DeviceRevision, and the like.
It is necessary to determine the interfaces and services of the adapters to which the adapter model structure corresponds. Information interaction is needed between the universal adapter and the special adapter through a group of adapter interfaces, and data and state information are transferred.
In one embodiment of the invention, the adapter interface includes the following:
Data input interface: is responsible for receiving the data and status information generated by the device and converting it into an OPC UA standardized data model.
Data output interface: is responsible for delivering processed data to other adapters or devices, supporting one-to-many data transfer.
Service interface: services such as subscription, publishing and the like are used for providing a globally unique identifier and supporting subscription and inquiry of information such as equipment states, data flows and the like.
In one embodiment of the invention, in order to ensure the expandability and maintainability of the adapter, the general adapter and the special adapter both adopt an object-based or group-based model, so that new equipment types and new data models can be conveniently expanded, and the expandability and the stability of the whole system are improved.
S3, constructing a general adapter and a special adapter based on the adapter model structure.
The universal adapter is constructed based on a universal basic information model related to industrial control equipment in the OPC UA standard. The generation of the universal adapter includes the following steps.
S311, selecting a general basic information model related to industrial control equipment in the OPC UA standard;
in one embodiment of the invention, the model is built mainly by using general basic information of two standards, i.e. ISA-95 and PA-DIM.
ISA-95 is an international standard for enterprise system and control system integration, and is a multipart set of standards defining interfaces between enterprise activities and control activities.
PA-DIM is based on NAMUR open architecture (NE 175), self-monitoring and diagnostics of field devices (NE 107) and NAMUR standard devices-meeting requirements of field device standardized applications (NE 131).
S312, acquiring equipment and instrument information, and adapting the equipment and instrument information to a general basic information model and deriving the equipment and instrument information according to the characteristics of the equipment and the instrument;
If the device and meter characteristics can match the generic basic information model, it is adapted to the generic basic information model. If some equipment and instrument characteristics cannot be matched with the general basic information model, in some application scenarios, the equipment can be newly accessed, and the equipment and instrument characteristics need to be matched with a special model.
S313, carrying out coding treatment on the derived adaptive general basic information model and compiling and outputting a general dynamic loading module;
And S314, generating OPC UA standardized services based on the universal dynamic loading module, thereby generating a universal adapter.
The universal adapter performs message transmission and information interaction with other devices and adapters through OPC UA standard services such as identification and registration services, discovery services, subscription and monitoring services and the like. The universal adapter is mainly responsible for forwarding and processing information, and standardizes and generalizes the information of different devices and instruments so as to realize efficient information exchange and sharing among different devices.
The special adapter is constructed on the basis of the universal adapter and mainly comprises the following steps.
S321, selecting a general basic information model related to industrial control equipment in the OPC UA standard.
S322, acquiring equipment and instrument information, and creating a special model based on the general basic information model according to the characteristics of the equipment and the instrument;
S323, adapting the equipment and instrument information to a special model and deriving;
In one embodiment of the invention, the type node is used for creating a special model based on the general model, and the modeling tool is used for exporting the information model of the special equipment in the industrial control system equipment in an XML form.
S324, coding the derived special model, and compiling and outputting a special dynamic loading module;
s325, generating OPC UA service and loading special dynamic loading module to generate special adapter.
S4, combining the universal adapter and the special adapter to construct an information data model of the corresponding industrial control system.
The interaction of the universal adapter and the special adapter may be achieved in several ways.
(1) Special adapter for use as a subassembly of a universal adapter
The universal adapter dynamically loads a plurality of special dynamic loading modules so as to load model information of the special adapter to the universal adapter; the universal adapter performs standardized processing on the converted information based on OPC UA standards; and the universal adapter communicates with the OPC UA server based on the standardized information.
In this case, only one service communicates with the OPC UA server, i.e., the generic adapter communicates with the OPC UA server as a special dynamic loading module for loading special adapters with one service.
The special adapter is responsible for handling information of a specific device or meter and converting it into a format recognizable by the generic adapter. The universal adapter is responsible for normalizing and generalizing the converted data to adapt it to the OPC UA universal model.
In one embodiment of the invention, a special adapter is used as a subcomponent of a generic adapter in the following scenario.
The main equipment suppliers in a single workshop need to provide complete information in the workshop for the upper MES system, special adapters dll provided by small equipment manufacturers can be dynamically loaded to be compatible with information of other small equipment manufacturers in the workshop, support and access of special information types of the small equipment manufacturers are completed, the information is collected into a single universal adapter service, and the information is uniformly provided for the upper MES system by the universal adapter
(2) Special adapter use independent of universal adapter
The special adapter may also be used independently of the generic adapter to communicate directly with the OPC UA server. In this case, the special adapter needs to support the OPC UA communication protocol and convert information of a specific device or meter into a format recognizable by the OPC UA protocol. The OPC UA server is responsible for integrating and managing information of all devices and meters to achieve standardized and generalized processing of device information.
In one embodiment of the invention, when a single device from a home manufacturer is a small part of the full-field device of the first party, and the requirement of being actively integrated into the full-field information system of the first party exists, the data needs to be externally presented as a part of a main device provider system, and at the moment, the data can be provided to the full-field device information model in the form of a separate special adapter by using a separate OPC UA service.
(3) The special adapter interacts with the universal adapter and then communicates with the OPC UA server.
The universal adapter traverses the address space of the special adapter through the OPC UA client to map the address space of the universal adapter to nodes in the address space of the universal adapter, so that the information agent of the special adapter is realized; the universal adapter standardizes and generalizes the information of all devices and meters; the universal adapter transmits the processed data to the OPC UA server.
As shown in fig. 4, a special adapter is shown to interact with a general adapter and then communicate with an OPC UA server, and the special adapter may also interact with the general adapter and transmit the converted data to the general adapter. The universal adapter is responsible for standardizing and generalizing the information of all devices and meters to adapt to the information model after OPC UA fusion. And then, the universal adapter transmits the processed data to an OPC UA server so as to integrate and manage equipment information. As shown in fig. 4, i.e., the universal adapter is linked to the address space of the particular adapter through SERVER 1.
The OPC UA server establishes an information model required by a user in an address space, maps the data acquired by the received equipment layer data acquisition module to a node corresponding to the address space, responds to a data request command of an edge layer, and updates the data in the address space at a proper time to ensure that the client reads the latest data. The OPC UA server uses a single thread to run, after the gateway is started, the configuration file is firstly analyzed to generate an address space information model, and then OPC UA service is started to provide data for an OPC UA client of the access server.
In one embodiment of the invention, the special adapter interacts with the universal adapter and then communicates with the OPC UA server, so that the special adapter is applied to the scene that the host computers in all levels are not in the same local area network, and the data are required to be collected to the host computers which can directly communicate with the MES through multi-level service. Each shop as a separate special server collects model information of a single shop, and the model information is collected in a universal adapter through a mapping method shown in fig. 4 to form a full-factory-level information model, and then the information model is uploaded to an MES system.
Taking the industrial control system shown in fig. 2 as an example, the method for carrying out industrial control equipment information fusion modeling based on OPC UA of the present invention is described.
The industrial control system is analyzed, the mapping relation shown in fig. 2 is constructed, and the production process and device adapter model and the instrument control adapter model are created based on the OPC UA standard according to the mapping relation in fig. 2. Wherein TopolgyElementType and ComponentType are defined in OPC 10000-100Devices, and the production process object and the control system object are organized in a component mode and a topology diagram mode respectively.
Taking the reciprocating unit shown in fig. 2 as an example, which is defined as the equipment type DEVICETYPE in fig. 3, the attributes of the information model of the unit include the following:
(1) Basic attributes
Hardware type (Model): the hardware type of the unit is a device
Manufacturer (Manufacturer) unit Manufacturer information
Hardware version (HardwareRevision) hardware version of the unit
Software version (SofewareRevision) set software version
Serial number (serial number) serial number of unit
(2) The subset of the set of subset, the subset of the set of pump units including motor, load, gearbox, are all defined using type DEVICETYPE.
(3) The dynamic information attribute is adapted to a special adapter due to the specificity, the general adapter is not required, and is implemented by the special adapter implementing the ISupportInfo Interface and DEVICEHEALTH INTERFACE interfaces, in which the behavior to be implemented is defined.
(4) After the unit information model is defined, exporting the unit information model into an xml type, and compiling the xml type into a device model dynamic library dll through UA ModelCompiler.
(5) And creating a general adapter service and a special adapter service based on the OPC UA standard, loading a device model dynamic library, and generating a corresponding unit device information model OPC UA type node.
(6) The adapter server and the field acquisition service acquire basic information and dynamic information of the device through webSocket, MQTT, http, and instantiate the device node in a UA standard address space according to the device type node.
(7) The universal adapter reads UA address space of the special adapter to update the equipment information node at regular time, and data fusion is realized through Aggregation of OPC UA standard, and the specific mapping relation is shown in figure 4.
It should be noted that: in other embodiments, the steps of the corresponding method are not necessarily performed in the order shown and described in this specification. In some other embodiments, the method may include more or fewer steps than described in this specification. Furthermore, individual steps described in this specification, in other embodiments, may be described as being split into multiple steps; while various steps described in this specification may be combined into a single step in other embodiments.
Claims (9)
1. The method for carrying out information fusion modeling on the industrial control equipment based on OPC UA is characterized by comprising the following steps:
constructing a device information model logic mapping relation based on the device information of the industrial control system;
Determining an adapter model structure according to the equipment information model logic mapping relation based on the OPC UA standard;
Constructing a general adapter and a special adapter based on the adapter model structure;
And combining the universal adapter and the special adapter to construct an information data model of the corresponding industrial control system.
2. The method of claim 1, wherein the adapter model structure comprises at least an interface, the adapter interface comprises at least a data input interface, a data output interface and a service interface,
The data input interface is used for receiving data and state information generated by the equipment and converting the data and state information into an OPC UA standardized data model;
the data output interface is used for transmitting the processed data to other adapters or devices;
the service interface provides a globally unique identifier for subscribing and publishing services to enable subscribing and querying device status and data flow information.
3. The method for performing information fusion modeling on industrial control equipment based on OPC UA according to claim 1, wherein the constructing a universal adapter based on an adapter model structure specifically comprises:
selecting a general basic information model related to industrial control equipment in the OPC UA standard;
Acquiring equipment and instrument information, and adapting the equipment and instrument information to a general basic information model and deriving according to the characteristics of the equipment and the instrument;
performing coding processing on the derived adaptive universal basic information model, and compiling and outputting a universal dynamic loading module;
and generating an OPC UA standardized service based on the universal dynamic loading module, thereby generating a universal adapter.
4. The method for performing information fusion modeling on industrial control equipment based on OPC UA according to claim 1, wherein the constructing a special adapter based on an adapter model structure specifically comprises:
selecting a general basic information model related to industrial control equipment in the OPC UA standard;
acquiring equipment and instrument information, and creating a special model based on a general basic information model according to the characteristics of the equipment and the instrument;
adapting the equipment and instrument information to a special model and deriving;
Coding the derived special model, and compiling and outputting a special dynamic loading module;
and generating OPC UA service, and loading a special dynamic loading module so as to generate a special adapter.
5. The method for performing information fusion modeling on industrial control equipment based on OPC UA according to claim 1, wherein the universal adapter performs standardization and generalization processing on information of different equipment and instruments based on OPC UA standard service so as to perform message transmission and information interaction.
6. The method for performing information fusion modeling on an industrial control device based on OPC UA according to claim 1, wherein the combining the universal adapter and the special adapter specifically comprises: the special adapter is used as a sub-component of the universal adapter, is independent of the universal adapter or the special adapter and is communicated with one or a combination of a plurality of or all of the OPC UA servers after being interacted with the universal adapter.
7. The method for performing information fusion modeling on an industrial control device based on OPC UA according to claim 6, wherein the special adapter is a sub-component of the universal adapter, specifically comprising:
the universal adapter dynamically loads a plurality of special dynamic loading modules so as to load model information of the special adapter to the universal adapter;
the universal adapter performs standardized processing on the converted information based on OPC UA standards;
and the universal adapter communicates with the OPC UA server based on the standardized information.
8. The method for information fusion modeling of industrial control equipment based on OPC UA of claim 6, wherein the special adapter is independent of the universal adapter,
The special adapter converts the information of the specific equipment or instrument based on the OPC UA protocol and transmits the converted information to the OPC UA server.
9. The method for performing information fusion modeling on an industrial control device based on OPC UA according to claim 6, wherein the special adapter and the universal adapter communicate with the OPC UA server after interaction, specifically comprising:
The universal adapter traverses the address space of the special adapter through the OPC UA client to map the address space of the universal adapter to nodes in the address space of the universal adapter, so that the information agent of the special adapter is realized;
The universal adapter standardizes and generalizes the information of all devices and meters;
the universal adapter transmits the processed data to the OPC UA server.
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