Method of automatically recognizing and classifying design information in imaged pid drawing and method of automatically creating intelligent pid drawing using design information stored in database

Patent metadata

Field	Value
Publication number	US-2020175211-A1
Application number	US-201916696953-A
Country	US
Kind code	A1
Filing date	Nov 26, 2019
Priority date	Nov 30, 2018
Publication date	Jun 4, 2020
Grant date	—

Abstract

An aspect of the present disclosure provides a method of recognizing and classifying design information by automatically digitizing an imaged P&ID drawing to digitize design information by totaling design elements with high accuracy within a short time, and another aspect of the present disclosure is to obtain an imaged P&ID drawing or a database stored in a text form as a digitized drawing by modeling a symbol, line, and text in an intelligent P&ID, thereby accurately and rapidly quoting a price and accurately checking compatibility between different design products.

First claim

What is claimed is:

1 . A method of automatically recognizing and classifying design information in an imaged P&ID drawing, the method comprising:
extracting a symbol region from the imaged P&ID drawing, subsequently setting an origin of a corresponding symbol and a connection point in the symbol region, and automatically registering the symbol to a database; recognizing and extracting the pre-registered symbol from the imaged P&ID drawing and removing the extracted symbol from the imaged P&ID drawing; recognizing and extracting a line using a sliding window method of calculating in a blob unit rather than a pixel unit in the symbol-removed imaged P&ID drawing; calculating an aspect ratio in the symbol-removed imaged P&ID drawing to calculate a region in which text is present, and subsequently recognizing and extracting text in the corresponding region; classifying text detected from a drawing region among the extracted texts into each attribute through a predefined attribute classification system; and associating the extracted symbol and line to an attribute of the extracted text on the basis of a most adjacent distance and associating on the basis of an equipment name recognized in the text when the extracted symbol is equipment.

2 . The method of claim 1 , wherein
in the registering of the symbol, if the symbol forms a group of a plurality of additional symbols, the group of the plurality of additional symbols is registered as a single symbol, and in the recognizing and extracting of the symbol, the registered symbol including the group of the plurality of symbols is first inspected and recognized.

3 . The method of claim 1 , wherein
in the recognizing and extracting of the symbol, the pre-registered symbol is rotated at 0, 90, 180, and 270 degrees and recognized and extracted from the drawing one by one.

4 . The method of claim 1 , wherein
in the recognizing and extracting of the symbol, the equipment among symbols is first inspected and a nozzle is searched and extracted in the periphery of an equipment region.

5 . The method of claim 1 , wherein
in the recognizing and extracting of the symbol, feature points of the recognized symbol and a symbol registered in the symbol registering process are compared, and only when a conformity degree of the recognized symbol is higher than a set threshold, the recognized symbol is recognized as the registered symbol.

6 . The method of claim 1 , wherein
in the recognizing and extracting of the line, if coordinates are different although a line is connected to the extracted symbol or if coordinates are different although a line and a line are connected, the line is extracted by correcting the coordinates in a pixel unit.

7 . The method of claim 1 , wherein
in the recognizing and extracting of the text, the text is recognized by an optical character reader (OCR), and if the text is not accurately recognized, the OCR is trained by accurately mapping the non-recognized or erroneously recognized text.

8 . The method of claim 1 , wherein
the associating of the extracted design information further comprises connecting a line and a symbol connected to the line through a recursive call technique and re-arranging the connected symbol in from-to order to generate topology.

9 . The method of claim 2 , wherein
the extracted design information and the topology are generated as a compatible XML type file.

10 . The method of claim 2 , wherein
in the generating of the topology, if an object connected to the line is an instrument among the symbols, the object is classified as a utility line, and the object is classified as a process line in otherwise case.

11 . The method of claim 2 , wherein
in the generating of the topology, it is connected to a different P&ID using a P&ID No shown in operating page connection (OPC) of the extracted text.

12 . A method of automatically creating an intelligent P&ID using design information stored in a database, the method comprising:
mapping the design information stored in the database to predefined intelligent P&ID, converting the mapped information, and storing an associating relationship and information of converted data; combining primary process lines in a design target process to each other to connect a main line in modeling to a primary line configuring the design target process in the converted data after being mapped to the intelligent P&ID, additionally connecting a branch line branched from the main line, wherein the branch line is connected using a connector of the main line, which is a target, as association information; calculating a line and a connector to which the symbol is to be connected in the intelligent P&ID in which the primary line is modeled, and modeling a symbol connecting the symbol to the primary line; modeling a utility line by combining the same type utility lines which are connectable as a group in the symbol-modeled intelligent P&ID drawing; and modeling the primary line and the utility line by associating attribute information of a line number present at the nearest position using coordinate information stored in the database in the utility line-modeled intelligent P&ID.

13 . The method of claim 12 , wherein,
in the converting and storing of the database, the database comprises the design information automatically recognized and classified in the imaged P&ID drawing and process order of the design information.

14 . The method of claim 12 , wherein,
in the modeling of the primary line, when the main line is combined, if the main lines cannot find a connection point and cannot be combined into a group, the line position is fine-adjusted to combine the connected lines to a group.

15 . The method of claim 12 , wherein,
in the modeling of the primary line, in the method of connecting the branch line to the main line as the target, a connection in which coordinates as a connection point are positioned is calculated as the connector to be connected, and connected.

16 . The method of claim 12 , wherein,
in the modeling of the primary line, connected primary lines are combined to each other through a recursive call technique, and in the modeling of the utility line, the same type connected utility lines are combined to each other through the recursive call technique.

17 . The method of claim 12 , wherein,
in the modeling of the primary line, when the symbol is connected to the primary line and recognized as a separate line, the primary line is connected.

18 . The method of claim 12 , wherein,
in the modeling of the symbol, if the symbol is not located on the line and is not connected, the symbol is modeled by correcting a position of the symbol to a position of the connected primary line.

19 . The method of claim 12 , wherein,
in the modeling of the symbol, attribute information of the symbol stored in the database is stored in association with a symbol attribute of the intelligent P&ID.

20 . The method of claim 12 , further comprising:
the modeling of the utility line further comprises modeling the utility line, calculating a line and a connector to which the reducer or specbreak symbol is to be connected, connecting the reducer or specbreak symbol to the primary line, storing a newly generated pipe run ID, correcting an existing pipe run ID, and subsequently modeling the reducer or specbreak, if the symbol is a reducer or specbreak type.

21 . The method of claim 12 , wherein,
in the modeling of the utility line, if

Assignees

• Doftech Co Ltd
• Postech Res & Business Dev Found

Inventors

• Kang Sung Oh
• Baek Hum Kyung
• Lee Eul Bum

Classifications

• G06K9/344

  Physics · mapped topic

• G06F2111/12

  Symbolic schematics · CPC title

• G06K2209/01

  Physics · mapped topic

• G06F30/23

  using finite element methods [FEM] or finite difference methods [FDM] · CPC title

• G06F30/12 Primary

  characterised by design entry means specially adapted for CAD, e.g. graphical user interfaces [GUI] specially adapted for CAD · CPC title