Characteristic point extraction-based three state data compression method of underground integrated monitoring system

Abstract

The invention discloses a characteristic point extraction-based three state data compression method of an underground integrated monitoring system. Data point employed in the underground integrated monitoring system contains two types of data: an analog quantity and a switch quantity. The method comprises a step of analog quantity compression and a step of switching quantity compression. With regard to data quantity filtering of an analog quantity, an algorithm including dead zone compression, mean square deviation compression and slope compression of characteristic point extraction is provided; dynamic adjustment is carried out during a compression process, so that an error is controlled in a given range, compression precision is ensured and a high compression ratio is obtained. Compared with other compression algorithms, the provided compression method enables an on-site testing compression ratio to be improved by 50% to 90%, so that it is avoided that a compression performance is poor due to an unreasonable arrangement. According to the method in the invention, the performance of a historical database is stable; real-time data collection and data compression storage can be carried out simultaneously; and the data compression performance is outstanding.

Description

technical field [0001] The invention relates to a method for compressing data in a subway comprehensive monitoring automation system, belonging to the technical field of data processing. Background technique [0002] The subway comprehensive monitoring automation system uses advanced computer integration and network interconnection technology to conduct comprehensive monitoring of the electromechanical equipment, vehicle operation status and passenger transport organization under the jurisdiction of each subway automation monitoring system, and realizes it on a unified hardware platform and software platform Resource sharing and information exchange form a comprehensive monitoring system with consistent data processing methods and a unified user interface, thereby providing an intuitive information interface for subway operation organization and maintenance management. It can monitor and control the operating equipment on site, and realize various functions such as data coll...

AI Technical Summary

Problems solved by technology

[0007] (4) Some semaphores are recorded once per second, while some semaphores are recorded only once an hour or even a day, and the time interval for data storage varies greatly

However, the data storage of the subway comprehensive monitoring system is to store data points according to a fixed time period, which leads to a large hard disk capacity requirement for subway control and slow data query speed, and the compression algorithm for historical data in the field of subway control has not been mentioned yet.

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