Real-time clustering extreme value calculation method based on graphic configuration

Abstract

The invention discloses a real-time clustering extreme value calculation method based on graphic configuration, and the method comprises the steps: building a table configuration file which needs to display an image extreme value, and deploying the table configuration file on each DCS engineer node; after a picture related program is started on an engineer service node, retrieving data in a real-time database according to a table configuration file, establishing a measurement point value memory index database, and generating a hash table data structure taking a measurement point value-object identifier (OID) as a key value pair; after the picture is started, verifying whether an extreme value needing to be calculated and displayed exists in the opened picture or not by anengineer non-service node, and if yes, establishing an extreme value memory index database according to extreme value information sent by the engineer station service node; and carrying out extreme value calculation on an engineer station service node picture. According to the method, when a DCS system engineer node is high in measuring point description repeatability, it can be guaranteed that only the extreme value of the measuring point is displayed on a picture, and redundancy of the measuring point is avoided.

Description

technical field [0001] The invention belongs to the technical field of distributed control systems, and in particular relates to a real-time calculation method for clustering extremum based on graph configuration. Background technique [0002] Distributed Control System (DCS) is a computer control system characterized by decentralized control functions and centralized management and operation, and has the characteristics of high reliability, complete functions and strong flexibility. In order to improve the efficiency of engineering implementation, in the process of DCS system engineering application, many measuring points are often encountered. It is necessary to monitor each measuring point in real time, but it does not need to be displayed on the screen. For example, the temperature of the fireplace, we Most of the time, only focus on its maximum value, which is convenient for the operation personnel on duty to carry out effective monitoring and judgment. [0003] In the...

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Problems solved by technology

[0003] During the process of monitoring the furnace temperature, especially when starting up, if the screen cannot automatically calculate and monitor the maximum value information of the furnace, it will affect the operation personnel to make accurate Judgment, two methods are generally adopted on site to monitor the relevant state of the fireplace. One is that the personnel on duty judge the relevant state of the fireplace according to the on-site experience, which is especially dependent on the experience of the personnel on duty; the other is to achieve by building function blocks in the configuration. The purpose of displaying the maximum value on the screen, but this will also test the experience of the configuration engineer, and once there is a problem with the data, it is difficult to troubleshoot, which brings great troubles and hidden dangers to on-site maintenance

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