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Distributed redundancy real-time database framework based on hybrid communication

A hybrid communication, real-time data technology, applied in the redundant operation of data error detection, electrical digital data processing, special data processing applications, etc., can solve problems such as high operating costs and difficulty in sharing information among multiple systems

Active Publication Date: 2014-02-05
南京国电南自轨道交通工程有限公司
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Problems solved by technology

Moreover, due to the traditional discrete monitoring system mode, that is, there are multiple independent monitoring systems such as signal, PSCADA (power monitoring), and BAS (environmental control), each of which is operated by a specialist, which has high operating costs and difficult information from multiple systems. Sharing and other issues, the comprehensive monitoring system that integrates the functions of each subsystem has gradually become a new development trend

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  • Distributed redundancy real-time database framework based on hybrid communication
  • Distributed redundancy real-time database framework based on hybrid communication
  • Distributed redundancy real-time database framework based on hybrid communication

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Embodiment Construction

[0019] The present invention will be further described in detail below in conjunction with relevant drawings and specific embodiments.

[0020] 1) Real-time data access module: The real-time data access to the real-time library in the monitoring system can be generally divided into two categories: one is the query access unit, which obtains the latest value of real-time data from the real-time library to meet the application requirements, such as: HMI The module queries the latest data from the real-time database and dynamically displays it to the operator; the alarm module queries the current data from the real-time database, and sends an alarm if there is an exception; the trend module periodically queries data from the real-time database and presents it in the form of a curve. The other is to update the access unit, which updates the value of the real-time data in the real-time library according to the application requirements. For example, after the acquisition or I / O modul...

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Abstract

The invention discloses a distributed redundancy real-time database framework based on hybrid communication. According to the framework, aiming at the characteristics that in a rail traffic monitoring system, the data scale is huge, the monitoring data has the internal semantic association, a work station is mainly used for real-time data inquiry, and the like, various proper strategies are respectively adopted in various aspects of redundancy real-time database distribution and synchronization, fault tolerance and the like, data with different properties are respectively transmitted in real time through the hybrid use of unicast communication and multicast communication, and the problem of repaid increase of synchronous communication data volume caused by scale expansion and other problems are solved. The time sequence consistency requirement of the internal semantic association of monitoring data on the real-time database synchronization is met through adopting reasonable strategies, the fault tolerance in the distributed redundancy real-time database framework is effectively realized, and the redundancy of a distributed real-time database in the monitoring system is more effectively realized. Compared with an ordinary double-redundancy framework, the distributed redundancy real-time database framework has the advantages that the reliability and the availability of the real-time database is more powerfully ensured, and the foundation is laid for the stable operation of the rail traffic monitoring system.

Description

technical field [0001] The technical invention relates to the field of rail transit automation, in particular to the field of distributed monitoring systems. The technical invention can be widely applied to various professional monitoring systems and comprehensive monitoring systems of electrified railways and urban rail transits. Background technique [0002] With the rapid development of computer science and automation technology, in various fields of rail transit, such as electrified railway and urban rail transit, monitoring systems have developed from traditional small desktop systems to modern distributed complex systems. The scope, process size, etc. all increase rapidly. Moreover, due to the traditional discrete monitoring system mode, that is, there are multiple independent monitoring systems such as signal, PSCADA (power monitoring), and BAS (environmental control), each of which is operated by a specialist, which has high operating costs and difficult information ...

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Application Information

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IPC IPC(8): G06F11/14G06F17/30H04L29/08
Inventor 戴宏斌经玉健吴小俊
Owner 南京国电南自轨道交通工程有限公司
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