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Schedule drawing automatic recognition and comprehend method

A technology for automatic identification and engineering drawings, applied in electrical digital data processing, special data processing applications, instruments, etc., can solve problems such as difficulties, and achieve the effect of solving low efficiency, strong understanding ability, and high precision

Inactive Publication Date: 2008-04-16
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally, when reading drawings manually, experienced engineers can quickly understand the hidden design intentions. For automatic recognition and understanding systems implemented by computers, how to represent various possible geometric compositions of engineering objects and semantic constraints between different objects relationship, and thereby guide automatic recognition and understanding, becomes the main difficulty

Method used

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  • Schedule drawing automatic recognition and comprehend method
  • Schedule drawing automatic recognition and comprehend method
  • Schedule drawing automatic recognition and comprehend method

Examples

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Embodiment Construction

[0028] The hierarchical structured knowledge representation represented by knowledge descriptors can be applied to the automatic recognition of engineering drawings in many different fields. For the convenience of understanding and description, the column graph in structural engineering drawings is used as an example for illustration. As shown in Figure 2, the column diagram is usually used to describe the design information of the columns in the first floor of the building or several floors with the same structure. It usually consists of grids and column representations. ) and reference columns (outline only). Figure 3 shows the graphic composition of a detailed column, where the column name string is composed of the column name identifier followed by an integer sequence number, and the column name identifier is generally an uppercase letter 'Z' or a lowercase letter 'z', Such as 'Z12' in it. The column centralized annotation is composed of column name string, column plane o...

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Abstract

The invention discloses a method for automatic identification and comprehension of engineering drawing, including the following steps: a CAD electronic engineering drawing is input by a user; according to the type of the input engineering drawing, a knowledge representation file which contains the knowledge description of the engineering filed is automatically selected; the engineering object graphic definition and the object correlation and constraint of the knowledge representation file are read by a knowledge processor and then are transmitted to an object recognizer for fast search and recognition of the designated object from the input engineering drawing. The method which realizes automatic identification and comprehension of engineering drawing by means of computer program ensures effective identification and comprehension of complex engineering drawing by a computer along with accurate result and high reliability, thereby effectively solving the problem of inefficiency of computer program in automatic identification and comprehension of engineering drawing.

Description

technical field [0001] The invention relates to a method for automatic recognition and understanding of engineering drawings, in particular to a method for automatically recognizing and understanding engineering drawings by using hierarchical knowledge representation to assist engineering design and retrieval. Background technique [0002] Engineering drawings have been widely used in machinery, electronics, construction, aviation, aerospace, shipbuilding, chemical industry, clothing and many other fields. As the main carrier to reflect design intentions, engineering drawings are widely circulated among all links in the engineering field, effectively promoting the improvement of industry efficiency. However, the manual reading method of engineering drawings has become the main factor restricting the retrieval and design reuse of engineering objects in massive engineering drawings. The engineering objects contained in engineering drawings are generally described graphically,...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 路通杨华飞蔡士杰
Owner NANJING UNIV
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