A distributed redundant real-time database framework based on hybrid communication
A real-time data and hybrid communication technology, which is applied to the redundancy in computing for data error detection, electrical digital data processing, special data processing applications, etc. It can solve the problems of difficulty in sharing information among multiple systems and high operating costs.
Active Publication Date: 2016-06-22
南京国电南自轨道交通工程有限公司
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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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[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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The invention discloses a distributed redundant real-time database framework based on hybrid communication. The framework is aimed at the characteristics of a rail transit monitoring system with huge data scale, inherent semantic associations in monitoring data, and real-time data query as the main work station. Redundancy The distribution, synchronization, fault tolerance and other aspects of the real-time library adopt various suitable strategies respectively, and transmit data of different natures in real time through the mixed use of unicast communication and multicast communication, so as to solve the problem of synchronous communication data volume caused by scale expansion Rapid growth and other issues, by adopting a reasonable strategy to meet the timing consistency requirements of the monitoring data intrinsic semantic association for real-time library synchronization, effectively realize the fault tolerance under the framework of distributed multi-redundant real-time library, and more effectively realize the monitoring system Compared with the conventional dual-redundant framework, the multi-redundancy of the distributed real-time library more effectively guarantees the reliability and availability of the real-time library, and lays the foundation for the stable operation of the rail transit 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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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