Circuit Connection Information Generation from Multi-Page PDF Drawings
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Solution Overview
Problem
Existing techniques for generating circuit connection information from drawing data, especially when the circuit is large and spans multiple pages, face challenges in accurately representing connections due to the loss of information during data format conversion from CAD to PDF, leading to potential errors in work order analysis.
Innovation Solution
A work support apparatus with line and point detection, drawing sign detection, wiring detection, character detection, and circuit connection information generation units that extract and accurately generate circuit connection information from drawing data, including line and character data, across multiple pages by identifying terminal components and associating them with component names or link signs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If CAD drawing data is converted to PDF format for display on wearable terminals, then the drawing data can be displayed on terminals with limited processing capability, but the circuit connection information is lost during conversion
Solution Approach 1:
The patent creates a copy of the circuit connection information by detecting lines and points from the PDF drawing data and generating corresponding circuit connection information that replicates the original CAD data's connectivity information, allowing the terminal to work with this copied information instead of the original CAD data
Solution Approach 2:
The patent introduces an intermediary process that detects lines and points from the PDF data and generates circuit connection information as a middle layer between the PDF display format and the required circuit connectivity information, enabling both display compatibility and connection information extraction
2Ease of operation
If circuit connection information is generated from PDF drawing data containing line and character data, then the drawing can be displayed on wearable terminals, but accurate generation of connection information over multiple pages becomes difficult
Solution Approach 1:
The patent segments the circuit connection information generation process into distinct detection steps: detecting lines, detecting points, detecting drawing signs, and detecting wirings, where each segment focuses on a specific aspect of the drawing data to maintain accuracy across multiple pages
Solution Approach 2:
The patent adds a new dimension of page coordination by detecting terminal components that span across multiple pages and generating connection information that links components across different pages, transforming the single-page processing approach into a multi-page coordinated approach
3Area of stationary object
If the circuit is divided and described over multiple pages, then large-scale circuits can be displayed, but generating accurate circuit connection information across pages becomes problematic
Solution Approach 1:
The patent segments the circuit diagram into multiple pages while maintaining detection continuity by identifying terminal components that extend across page boundaries and generating connection information that accurately represents connections across the segmented pages
Solution Approach 2:
The patent implements a feedback mechanism where the detection results from one page inform the detection process on subsequent pages, allowing the system to track terminal components across pages and generate accurate connection information by referencing previously detected elements
Data Source
AI summary
A work support apparatus includes a line and point detection unit that acquires drawing data in which a circuit indicating a connection relationship between devices is described by a character, a line, and a point, and detects the line and point based on the drawing data. A drawing sign detection unit detects a drawing sign constituting the circuit. The wiring detection unit detects a wiring connecting the drawing signs based on information on the line and point. The character detection unit detects the character. The circuit connection information generation unit generates circuit connection information. Since the circuit connection information in the same page and over pages of the drawing data is generated, the terminal component detection unit detects, as a terminal component, a wiring or first drawing sign that is not connected to a second drawing sign at least at one end.