CN114154925A - OPC UA-based digital twin warehouse research and application - Google Patents
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Abstract
The invention relates to the technical field of warehouse logistics, in particular to digital twin warehouse research and application based on OPCUA; the method comprises the following steps: (1) each data acquisition device in the warehouse respectively acquires data information of corresponding monitoring devices; (2) the method comprises the following steps that data information of each monitoring device is transmitted to an OPCUA server through an Ethernet, the OPCUA server loads the acquired data information of each monitoring device into an OPCUA server node, performs data coding, and then stores the data information into a database or sends the data information to an OPCUA client for use; (3) the OPCUA client side makes a request to the OPCUA server, acquires data from the OPCUA server and decodes the data; the invention combines the digital twin technology and the OPCUA technology, and solves the problems of difficult equipment control, poor data timeliness and difficult information system communication in industrial warehousing.
Description
Technical Field
The invention relates to the technical field of warehouse logistics, in particular to digital twin warehouse research and application based on OPC UA.
Background
With the rapid development of the internet of things, big data and intelligent manufacturing technologies, the digital twin has come into the field of vision of people and is gradually applied to industrial manufacturing. The digital twin warehouse is to establish a digital model of the warehouse by using a three-dimensional modeling technology, drive the digital model by means of industrial data to simulate the operation of equipment, product logistics and environmental changes in a real warehouse, map physical warehouse to the digital warehouse in real time, and perform real-time monitoring, logistics optimization and equipment health management on the warehouse. The real-time mapping is required to be established on the basis of real-time data driving, but automation equipment in the warehouse is from different manufacturers, and different communication protocols and specifications are adopted, so that normal communication cannot be carried out between the equipment and a system, a large number of information isolated islands are formed, and the cost of data integration is greatly increased.
The OPC UA is used as an open cross-platform architecture, supports various complex data types, has a reliable data communication mode and a safety mechanism, and is suitable for data communication between different operating systems and multi-protocol equipment.
In summary, the domestic research on OPC UA technology mainly focuses on the development of basic functions, and is not yet mature for the application of the actual industry, and particularly, in a warehousing environment with various equipment types and complex scheduling conditions, further research is needed.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide digital twin warehousing research and application based on OPC UA, and the invention combines the digital twin technology and the OPCUA technology to solve the problems of difficult equipment control, poor data timeliness and difficult information system communication in industrial warehousing.
In order to achieve the purpose, the invention provides the following technical scheme:
the digital twin warehouse research and application based on OPC UA comprises the following steps:
(1) each data acquisition device in the warehouse respectively acquires data information of corresponding monitoring devices;
(2) the data information of each monitoring device is transmitted to an OPC UA server through an Ethernet, and the OPC UA server loads the collected data information of each monitoring device into an OPC UA server node, performs data coding, and then stores the data information into a database or sends the data information to an OPC UA client for use;
(3) and the OPC UA client makes a request to the OPC UA server, acquires data from the OPC UA server and decodes the data.
The invention is further configured to: in step (2), the data information of each monitoring device is converted into an OPC UA format in the OPC UA server.
The invention is further configured to: in step (2), the OPC UA server node maps each monitoring device in the address space, and includes all the status information of each monitoring device.
The invention is further configured to: the address space is composed of a plurality of nodes, a unified data model is established for each monitoring device, and each node is managed by the data model.
The invention is further configured to: in step (2), the data encoding is to write the data information into a binary stream format according to a set rule.
The invention is further configured to: in the step (2), the database is a MySql database.
The invention is further configured to: in the step (3), the OPC UA client browses the node information of the address space thereof to acquire real-time data by acquiring the registered OPC UA server list, decodes the acquired data, and sends the node information to the information service layer of the digital twin warehouse.
The invention is further configured to: in step (3), the OPU UA server may also read or write data from or to the address space node of the OPC UA server in a read-write manner.
Advantageous effects
Compared with the known public technology, the technical scheme provided by the invention has the following beneficial effects:
the invention unitedly encodes the collected device data, stores the encoded data in the address space to establish an OPCUA server, establishes a MySql database table structure, and communicates with an OPC UA client through an OPC UA protocol, so that an upper information system can acquire information more quickly, conveniently and timely, thereby greatly improving the monitoring and management capability of a manager on storage.
Drawings
FIG. 1 is a schematic diagram of a digital twin warehouse architecture in embodiment 1 of the present invention;
fig. 2 is a schematic diagram of a digital twin warehouse OPC UA communication architecture in embodiment 2 of the present invention;
FIG. 3 is a schematic diagram of a digital twin warehouse management interface in embodiment 3 of the present invention;
fig. 4 is a communication flow chart of the robot in embodiment 3 of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The present invention will be further described with reference to the following examples.
Example 1: digital twin warehouse
The digital twin warehouse maps the physical warehouse in a digital space in real time, truly reflects the full life cycle of the warehouse, and comprises a physical entity layer, a twin model layer, a twin data layer and an information service layer, which are shown in figure 1. The following layers will be described as follows:
the physical entity layer comprises equipment, sensors, industrial robots and the like in the warehouse, and is a source of real-time data, namely each detection equipment;
the twin model layer is a virtual storage model built through three-dimensional modeling, and physical storage is simulated in high fidelity;
the twin data layer is used for storing and processing data and mainly comprises data acquired by the physical entity layer and fed back by the information service layer;
the information service layer interconnects and intercommunicates upper MES, ERP, PDM and other information systems to complete the optimization of logistics schemes, equipment monitoring management and visual real-time storage monitoring.
Example 2: digital twin warehouse based on OPC UA
As shown in fig. 2, the method comprises the following steps:
(1) and each data acquisition device in the warehouse respectively acquires the data information of the corresponding monitoring device.
(2) The data information of each monitoring device is transmitted to an OPC UA server through an Ethernet, and the OPC UA server loads the acquired data information of each monitoring device into an OPC UA server node, performs data coding, and then stores the data into a database or sends the data to an OPC UA client for use.
The OPC UA server node is used for mapping each monitoring device in an address space, comprises all state information of each monitoring device, and can modify, add, delete and the like the node through node management.
The address space is composed of a plurality of nodes, a unified data model is established for each monitoring device, and each node is managed by the data model.
The data coding is to write the data information into binary stream format according to the set rule, and the binary coding mode is selected, which has the effects of small volume and high transmission speed on the communication line.
The database is a MySql database, data are collected and analyzed at the front end in the MySql database and then stored in the MySql database, a table structure is established in a classification node mode, an intermediate table is classified according to the type of equipment, the data table stores the attribute values of the equipment in the nodes, and in the table structure with clear node layers, an upper-layer information system can quickly acquire effective information when calling and inquiring the data.
The data information of each monitoring device is converted into an OPC UA format in an OPC UA server, collected PLC program information, RFID digital signals and sensor pulse signals are managed in a unified mode, information support is provided for an information service layer of digital twin storage, and comprehensive storage monitoring and device management are achieved through data analysis and processing.
(3) And the OPC UA client makes a request to the OPC UA server, acquires data from the OPC UA server and decodes the data.
The OPU UA client may be installed on a PC side or a mobile device side.
The OPC UA client browses node information of an address space of the OPC UA server to acquire real-time data by acquiring a registered OPC UA server list, decodes the acquired data and sends the node information to an information service layer of the digital twin warehouse.
The OPU UA server may also read or write data from or to address space nodes of the OPC UA server by means of reading and writing.
Thus, the warehousing administrator can obtain warehousing information on a plurality of OPC UA clients.
Example 3: application of digital twin warehouse based on OPC UA
As shown in fig. 3, a digital twin warehousing system based on OPC UA is designed and developed for a certain yunnan cigarette factory as an example. The OPC UA and the digital twin technology are combined, the physical storage and the digital storage can be highly fused, the combination of the storage operation and the information data is very important content in the process of transferring the storage of a cigarette factory to intelligent manufacturing, and two different spaces are synchronously operated, namely mapped in real time, so that the method is more real-time, more dimensional and more accurate than the traditional method.
(1) Data real-time mapping subject
The main contents of the mapping of the physical storage and the digital storage are divided into the following 4 parts:
1) equipment: the running states, coordinate positions and executed work of industrial robots, conveyor belts, AGV, stackers and other equipment on the storage production line are mapped in real time, and the mapping is accurate to each machine.
2) Cigarette carton: the cigarette carton is the core content of assembly line work, all links such as cigarette carton warehousing processing, production, packaging and the like are mapped in real time, and process data in the production process are stored in cigarette carton entity labels and virtual cigarette cartons.
3) Environment: the environment in the warehouse is simulated in real time by combining the change of the environmental parameters, the production tasks can be regulated and controlled according to the environmental conditions, and early warning is carried out on the environment which is not suitable for production.
4) An information system: the method comprises the steps of mapping logistics progress, task completion progress, warehouse entry and exit progress and other information of all links on a production line in real time, and displaying tray conditions, job task progress, equipment fault information and the like of the elevated warehouse in a visualized mode in real time.
(2) Application of OPC UA and industrial robot
As shown in fig. 4, in the warehousing of the cigarette factory, industrial robots are widely used, the warehousing assembly line basically realizes automatic operation, and real-time information of the robots must be acquired to display to the management interface of the administrator in order to monitor the warehousing in real time. Because the types of robots are various and the types of generated data are different, in order to realize unified management, digital twin warehousing based on OPC UA is adopted. The specific process is as follows:
uniformly coding and transmitting data collected by a robot, a sensor, an RFID reader-writer, a PLC device and the like according to an OPC UA format, establishing an information model structure, and conveniently managing front-end data;
meanwhile, the data are stored in a MySql database, an upper information system can be called at any time, and monitoring and data mining on front-end equipment are realized;
and establishing related OPC UA servers aiming at different equipment OPC UA architectures, loading the information models into OPC UA server nodes, and communicating with OPC UA clients through OPC UA protocols.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the corresponding technical solutions.
Claims (8)
1. The digital twin warehouse research and application based on OPC UA is characterized by comprising the following steps:
(1) each data acquisition device in the warehouse respectively acquires data information of corresponding monitoring devices;
(2) the data information of each monitoring device is transmitted to an OPC UA server through an Ethernet, and the OPC UA server loads the collected data information of each monitoring device into an OPC UA server node, performs data coding, and then stores the data information into a database or sends the data information to an OPC UA client for use;
(3) and the OPC UA client makes a request to the OPC UA server, acquires data from the OPC UA server and decodes the data.
2. The OPC UA based digital twin warehouse study and application of claim 1 wherein in step (2) the data information of each monitoring device is converted into OPC UA format in OPC UA server.
3. The OPC UA based digital twin warehouse study and application of claim 1 wherein in step (2) said OPC UA server node maps each monitoring device in address space, including all status information of each monitoring device.
4. The OPC UA based digital twin warehouse study and application of claim 3 wherein the address space is composed of a plurality of nodes, wherein a unified data model is constructed for each monitoring device, and each node is managed by the data model.
5. The OPC UA based digital twin warehouse study and application of claim 1 wherein in step (2) the data encoding is to write the data information into binary stream format according to the set rules.
6. The OPC UA based digital twin warehouse study and application of claim 1 wherein in step (2) the database is MySql database.
7. The research and application of OPC UA based digital twin warehouse as claimed in claim 4, wherein in step (3), the OPC UA client obtains real-time data by obtaining the list of registered OPC UA servers, browsing the node information of the address space thereof, decoding the obtained data, and sending the node information to the information service layer of digital twin warehouse.
8. The OPC UA based digital twin warehouse study and application of claim 4, wherein in step (3), the OPU UA server can also read or write data from or to the address space node of the OPC UA server by reading or writing.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115659471A (en) * | 2022-11-02 | 2023-01-31 | 华建数创(上海)科技有限公司 | Data fusion method based on object model and model coding |
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| CN112099948A (en) * | 2020-09-10 | 2020-12-18 | 西安交通大学 | Method for standardizing digital twin manufacturing unit protocol and integrating industrial big data in real time |
| CN112529497A (en) * | 2020-12-03 | 2021-03-19 | 安徽理工大学 | Intelligent warehousing system based on OPC UA over TSN under 5G network |
| CN113093680A (en) * | 2021-04-07 | 2021-07-09 | 上海电机学院 | FIMS system architecture design method based on digital twin technology |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112099948A (en) * | 2020-09-10 | 2020-12-18 | 西安交通大学 | Method for standardizing digital twin manufacturing unit protocol and integrating industrial big data in real time |
| CN112529497A (en) * | 2020-12-03 | 2021-03-19 | 安徽理工大学 | Intelligent warehousing system based on OPC UA over TSN under 5G network |
| CN113093680A (en) * | 2021-04-07 | 2021-07-09 | 上海电机学院 | FIMS system architecture design method based on digital twin technology |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115659471A (en) * | 2022-11-02 | 2023-01-31 | 华建数创(上海)科技有限公司 | Data fusion method based on object model and model coding |
| CN115659471B (en) * | 2022-11-02 | 2024-01-26 | 华建数创(上海)科技有限公司 | Data fusion method based on object model and model coding |
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