Hierarchical Control Logic Diagram Matching for Partial Logic Reuse
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Solution Overview
Problem
Existing methods for creating control logic diagrams, such as those described in PTL 1, are inefficient as they cannot find logics partially different from a reference logic, limiting the enhancement of control logic diagram creation efficiency, especially in plant processes with exceptional operations.
Innovation Solution
A design support method and apparatus that analyze control logic diagrams using hierarchized analysis rules to identify and present similar diagrams and control logic parts, focusing on global similarity to recommend appropriate control logic parts for editing, thereby improving design efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If exact matching of control logic is used to find similar diagrams, then precision of logic matching is improved, but the ability to find partially different logics deteriorates
Solution Approach 1:
The patent segments control logic diagrams into multiple hierarchical levels (first level, second level, third level). Each level represents a different granularity of logic components, allowing the system to match diagrams at various degrees of detail. This segmentation enables finding partially different logics by matching at higher levels while allowing differences at lower levels.
Solution Approach 2:
The patent introduces a hierarchical dimension to the logic matching process. Instead of single-dimensional exact matching, the system evaluates similarity across multiple hierarchical levels, adding a dimensional aspect to the matching criterion. This allows partial matches to be recognized as similar diagrams.
2Measurement precision
If comprehensive analysis of all control logic parts is performed, then analysis accuracy is improved, but processing time increases
Solution Approach 1:
The patent divides control logic analysis into hierarchical segments, analyzing diagrams at different levels of detail. This allows the system to perform comprehensive analysis where needed while skipping detailed analysis for obviously similar parts, reducing overall processing time while maintaining accuracy.
Solution Approach 2:
The patent performs preliminary analysis at higher hierarchical levels before conducting detailed analysis at lower levels. By first identifying obvious similarities or differences at the first level, the system can avoid unnecessary detailed analysis of clearly dissimilar diagrams, saving processing time.
Data Source
AI summary
A design support method includes: acquiring reference diagrams which are control logic diagrams created in the past, and an editing object diagram; and applying each of analysis rules to each control logic diagram, and analyzing the control logic part included in each control logic diagram. The analysis rules satisfy a relation in which a control logic part corresponding to an analysis rule at a higher hierarchy level contains a control logic part corresponding to an analysis rule at a lower hierarchy level. The design support method further includes: specifying, as a similar diagram, a reference diagram including a control logic part common with the control logic part included in the editing object diagram, among the reference diagrams, based on an analysis result; and presenting a control logic part having a hierarchical relation with the common control logic part, among control logic parts included in the similar diagram.