A virtual-real synchronous operation method of digital twin based on publish/subscribe mode

Abstract

The invention discloses a digital twin virtual-real synchronous operation method based on a publish / subscribe mode, which establishes an OPC UA information model of the device; generates an OPC Server, and calls the corresponding OPC Client to analyze the transmission protocol and data format of the device, and unify it into OPC UA Protocol and OPC Binary / XML data format; then establish the digital twin model of the equipment, configure the covariant data nodes of the virtual and real equipment list; monitor the node changes and call the corresponding callback function, and publish the data to the data middleware, and the twin model The corresponding data node subscribes to the data to realize the synchronous operation of virtual and real devices. The present invention is based on the publishing and subscribing mode, which has low coupling, saves a lot of I / O operations, and has strong real-time data.

Description

technical field [0001] The invention belongs to the technical field of intelligent manufacturing and digitalization, and in particular relates to a digital twin virtual-real synchronous operation method based on a publish / subscribe mode. Background technique [0002] Digital twin technology is an emerging technology in the field of intelligent manufacturing. It is mainly used to realize the interaction and integration of the manufacturing physical world and the information world. It plays an important role in scenarios such as aerospace, automobile manufacturing, and simulation testing. Digital twin technology has application requirements in the following aspects: [0003] (1) Modeling of digital twins; [0004] (2) The integration of the physical world and the information world; [0005] (3) Synchronous operation of the physical world and the virtual world; [0006] (4) Service application based on cyber-physical fusion. [0007] At present, most research regards digita...

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Problems solved by technology

[0009] (1) Due to different manufacturers and data transmission standards, the equipment will use different data transmission protocols, and at the same time define different data formats for transmission, which will lead to the complexity of the transmission protocol and the heterogeneity of the transmission data, so that the multi-physics Data integration of devices is becoming more and more difficult;

[0010] (2) Due to the need to establish the synchronous operation of the physical equipment and the twin model, the real-time performance of the data must be guaranteed, and a large number of IO operations need to be generated, while the traditional relational database will reduce the real-time performance of the data;

[0011] (3) Lack of a reliable information model to realize the data node mapping between twin models and physical equipment

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