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Distributed automatic test system based on OPC UA architecture Pub-Sub mode

An automatic test system, pub-sub technology, applied in the direction of test/monitoring control system, general control system, electrical test/monitoring, etc. The effect of reducing costs, simplifying communication configuration, and efficiently sending and receiving messages

Inactive Publication Date: 2021-05-14
CRRC QINGDAO SIFANG ROLLING STOCK RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the existing automatic test environments for distributed systems use UDP or TCP point-to-point to transmit data and form a mesh topology. The more complex the test environment, the more cumbersome the configuration of network IP and ports, and it is prone to errors

Method used

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  • Distributed automatic test system based on OPC UA architecture Pub-Sub mode
  • Distributed automatic test system based on OPC UA architecture Pub-Sub mode
  • Distributed automatic test system based on OPC UA architecture Pub-Sub mode

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Experimental program
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Embodiment Construction

[0024] Specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0025] OPC UA Pub-Sub is an extension of the OPC UA protocol. It is a content-based message transmission method that transmits messages through the transport layer. This protocol allows applications to publish messages to multiple subscribers through intermediate agents. Each message has A topic, clients in the network can publish and subscribe to a message of a topic, once a message of a topic is published, all subscribers will receive the message of the topic in time. At the same time, the publisher can encrypt and digitally sign the message through the security key service before sending it to the intermediate agent to ensure that no one else can read or modify the message except the target recipient, which will protect the publisher's Data, publishers and subscribers communicate securely through a shared secret. OPC UA provides a rich OPC U...

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Abstract

The invention relates to a distributed automatic test system based on an OPC UA architecture Pub-Sub mode. The system architecture comprises a message center, a line model, a train model, a bridge model and a station yard graph model, wherein the line model, the train model, the bridge model and the station yard graph model form a dynamic star topology structure through the message center, the message center is set to be a message framework configured based on an OPC UA architecture Pub-Sub mode, supports a dynamic topology mode from n to m, and carries out IP address and port binding at a PUB end and a SUB end, and the line model, the train model, the bridge model and the station yard graph model communicate with one another by configuring the IP address of the message center. According to the test system, distributed communication and a star topology structure are realized by adopting a message queue based on an OPC UA publishing / subscribing mechanism, and compared with traditional mesh communication, the test system is simple in configuration and higher in efficiency, and a test environment is more convenient to expand.

Description

technical field [0001] The invention belongs to the technical field of rail transit ATC system testing, in particular to a distributed automatic testing system based on the OPC UA framework Pub-Sub mode. Background technique [0002] The rail transit ATC system (automatic train control system) consists of multiple subsystems, each of which covers many new technologies, and requires complete verification of the functions realized by applying new technologies, and it is unrealistic to completely rely on field tests for such verification. It is necessary to build an indoor debugging and testing environment to ensure the comprehensiveness and completeness of the verification. In addition, this environment built according to the testing needs also promotes the efficiency of system development and debugging. Most of the existing automatic test environments for distributed systems use UDP or TCP point-to-point to transmit data and form a mesh topology. The more complex the test env...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B23/02
CPCG05B23/0243G05B2219/24065
Inventor 盛志冰尹龙龙李文正李鲲鹏徐磊
Owner CRRC QINGDAO SIFANG ROLLING STOCK RES INST
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