JPH052615A - Automatic drawing input system and method - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a system and method capable of simplifying the drawing input process of P & ID for nuclear power plant equipment and improving the efficiency of the time and quality of drawing input work. According to the present invention, while scanning a target drawing to obtain image data and displaying the image data as a background image,
The interactive input enable area is designated, the interactive input enable target is input in the interactive input enable area, the image data in the interactive input enable area is deleted, and the figure automatic operation is performed on the remaining image data. Drawing comprising the steps of performing recognition processing and automatic graphic connection processing to acquire graphic data, and performing automatic logical information recognition processing on the graphic data to acquire structured graphic data. An autofill method is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drawing input system and method, and more particularly to automatic input of graphic information contained in a piping and instrumentation diagram (P & ID: Piping & Instrument Diagram) of a nuclear power plant facility into a computer. The present invention relates to a drawing input system and method for creating a facility drawing database for a system that uses P & IDs on a computer by adding logical information.

[0002]

2. Description of the Related Art It has been attempted to construct a structured CAD database based on various existing drawing resources such as a piping instrumentation diagram, a circuit diagram, a mechanical drawing, and a map and to use the CAD database in a more advanced manner. . In order to realize this, it is first necessary to input the graphic information represented on the drawing. As a method of acquiring this graphic information, the manual input method is considered first, but the input man-hours required for drawing input to the CAD system are enormous. It takes a lot of time, and shortening this input time is an important issue. Also, with manual input, the quality of data greatly depends on the operator's personality and skill level,
There is a high probability that an input error will occur. Therefore, for the purpose of eliminating the above disadvantages of the manual input method,
General purpose automatic drawing input systems have been developed.

A general-purpose drawing automatic input system usually comprises a drawing input unit for acquiring image data from a document drawing and a recognition processing unit for arithmetically processing the obtained binary image data. An original drawing is first read in a drawing input unit by a binarizing device such as an image scanner, converted into a binarized code, and subjected to appropriate preprocessing such as image quality improvement, data compression, and simple feature extraction. . Then
The image data is usually subjected to vector data conversion processing, drawing recognition such as symbol and character string extraction in the recognition processing unit, and further, if necessary, symbol classification, symbol attribute addition, inter-symbol Logical information processing such as logical association is performed. Many attempts have been made to construct a structured CAD database by a general-purpose drawing automatic input system according to such an algorithm. However, in the conventional system, since the target image data is enormous, the range of the drawing to be recognized is limited, the recognition time is too long, or the system is expensive, which is not practical. It was not possible to provide a satisfactory drawing input system.
Furthermore, since it is unlikely that the input error will be zero,
Finally, it is necessary to check and correct the drawing of the recognition result by the interactive processing, and such correction and check also require enormous time and cost. Furthermore,
In the conventional system, the number of symbols is very large, the sizes of the symbols are various, and it is difficult to automatically input the P & ID including a large irregular symbol.

[0004]

Therefore, the first aspect of the present invention
The object of the present invention is to provide a system for automatically inputting existing drawings such as P & ID by efficiently combining batch processing and interactive processing in order to solve the above-mentioned various problems that the conventional technology has, and a system therefor. To provide a method.

Still another object of the present invention is to construct a structured CAD database that can take in geometric information more quickly than conventional systems and can easily input logical information. It is to provide a drawing input system and a method thereof.

Still another object of the present invention is that the number of input steps required is small and the image data processing can be speeded up. Therefore, the time and cost required for inputting a drawing can be greatly reduced as compared with the conventional system. It is an object of the present invention to provide a drawing input system and a method thereof with high practicability.

Another object of the present invention is to provide an interactive drawing input system and its method, which do not require a skilled operator as in the prior art and allow a beginner operator to sufficiently input.

Still another object of the present invention is to provide an interactive drawing input system and method capable of easily checking and modifying an input drawing by interactive processing and capable of highly accurate and reliable drawing input. It is in.

Still another object of the present invention is suitable for inputting P & ID, particularly suitable for automatic input of P & ID for nuclear power plant equipment, and the nuclear power plant equipment is managed by centralized management of the structured CAD database formed. An object of the present invention is to provide a P & ID automatic input system and method for a nuclear power plant facility capable of improving the maintenance of the P & ID.

[0010]

In order to solve the above-mentioned problems, according to the present invention, by suitably combining batch processing and interactive processing, with a small number of input man-hours and work by a beginner operator, Provided are an interactive drawing input system and method capable of highly accurate and reliable drawing input.

That is, according to the first aspect of the present invention,
Scanning the target drawing to obtain image data; displaying the image data as a background image, designating an interactive input enable area and inputting an interactive input enable target in the interactive input enable area; Delete the image data in the interactive inputable area; perform automatic figure recognition processing and automatic figure connection processing on the remaining image data to acquire the figure data; interactively modify the acquired figure data Processing; logical information automatic recognition processing is performed on the interactively modified graphic data to obtain structured graphic data; interactive edit processing is performed on the structured graphic data; from each step A method for automatically inputting a drawing is provided.

According to another aspect of the present invention, drawing input means for scanning a target drawing to generate image data; image display means for displaying the image data as a background image; Man-machine interface means for designating an interactive input enable area and inputting an interactive input enable target in the interactive input enable area based on the image data displayed as a background image on the display means; First processing means for arranging interactive input enable target data in the interactive input enable area and deleting image data in the interactive input enable area in response to input of the type input enable target Second processing means for obtaining graphic data by performing graphic automatic recognition processing and graphic automatic connection processing on the remaining image data; and interactive correction processing for the graphic data. Third processing means and for applying; subjected to logical information automatic recognition processing for interactive modified the graphic data, a fourth for acquiring structured graphic data
Processing means for performing interactive editing processing on the structured graphic data; storage means for storing the interactive edited structured graphic data;
A drawing input system is provided.

A target drawing to which the present invention is preferably applicable is a piping instrumentation diagram composed of character strings, symbols and various lines, or a device system diagram (P & ID: Piping and I).
nstrument diagram), and is particularly preferably applied to P & ID for nuclear power plant equipment. P & ID is a drawing showing the connection between various plant equipment such as a nuclear reactor and a heat exchanger and various parts, and the logical connection relationship of a control system. The P & ID has the characteristics that the number of symbols is extremely large (more than several hundreds), the symbol sizes are various, and that various plant equipment such as reactors and heat exchangers are described as large irregular symbols. It is a preferred drawing resource to have and implement interactive drawing input in accordance with the present invention.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a block diagram showing the basic system configuration of the present invention. Further, FIG. 4 shows the movement of the screen for each work displayed on the display device.

Manuscript drawing 1 such as P & ID for nuclear power plants
0 (see FIG. 4 (a)) is preferably checked before performing the process according to the present invention to repair stains on the drawing and blurring of lines and characters. If the engineer can check the description content of the drawing in advance from a technical point of view and correct errors, the process according to the present invention can be carried out more smoothly. For example, if the drawings are crossed, and the drawing is unclear due to handwriting, is one pipe jumping over the other, or are the pipes connected to each other? Although it is difficult to determine, it is possible to reduce the load on the system and shorten the processing time by making a correction from a technical point of view at this point.

An appropriately modified original drawing 10 (FIG. 4).
(See (a)) is the drawing input / vectorization block 11
At 2, the image is raster-scanned by using a binarizing means such as an image scanner and converted into binarized data. Figure 4 (b)
As shown in, it is possible to display the input result on a display device such as a CRT and confirm the image quality of the input image. Next, the binarized data (raster data) input by the scanner is converted into line segment data (vector data). In vectorizing the binarized data, it is necessary to set some parameters depending on the complexity of the drawing to be processed, cleanliness, description content, etc., but it is obvious to those skilled in the art what these parameters are. It is an experience value obtained by trial and error several times. If necessary, the vectorized data is converted into data for subsequent processing, and then transferred to hardware for subsequent processing.

Subsequently, the transferred image data is
In the symbol recognition / geometric correction block 12, predetermined symbols and character strings are recognized and modified by a combination of interactive processing and batch processing to acquire graphic data. The flow of the algorithm executed in the symbol recognition / geometric correction block 12 is shown in FIG. In this block, an interactively inputtable target is interactively input via the man-machine interface 15 based on the image data transferred and displayed as a background image (21 and 22), and then the remaining image data is input. On the other hand, the pipe-attached symbol automatic recognition process 23 and the symbol / line segment automatic connection process 24 are performed, and the acquired graphic data is appropriately modified.

The algorithm of FIG. 2 will be described in more detail. The objects that can be interactively input in blocks 21 and 22 are alphanumeric characters such as piping numbers and valve numbers, device names, Japanese character strings such as notes, and code input symbols such as instrumentation symbols. In block 21, the operator designates a character input area by man-machine interface means such as a keyboard or a mouse while referring to the image data displayed in the background image, and
As shown in (c), a character is input in the designated area. The image data in the designated area is deleted as the character is input. In this step, it is possible to automatically recognize Japanese and alphanumeric characters, but it is very difficult to cut out and recognize the character string freely described in the drawing with high accuracy, As is well known, automatic recognition of Japanese and alphanumeric characters does not necessarily lead to a reduction in the input time of the entire system. Therefore, as in the present invention, raster data is displayed in the background and the word processor function of the system allows interactive processing. It is possible to shorten the input time by trying the input.

Further, in block 22, the operator designates an area of a symbol, such as an instrumentation symbol, in which a code can be input through the man-machine interface means while referring to the image data displayed in the background image, and the designated area. Enter the related code such as the instrumentation number in. It is also possible to display the candidate symbols based on the appearance frequencies registered by the drawing survey and select a suitable symbol from the candidate symbols. Figure 4 (d)
As shown in, the instrumentation symbol is configured to be displayed on the display device by inputting or selecting the related code. The image data in the area is deleted.

In this way, before the automatic graphic recognition processing 23 and the automatic graphic connection processing 24 are performed, in blocks 21 and 22, it is difficult to perform automatic recognition or a character string or an instrumentation symbol suitable for interactive input, etc. By interactively inputting the symbol that can be code-inputted, and deleting the image data within the predetermined range to exclude it from the subsequent processing target, the subsequent processing can be smoothly and rapidly advanced.

Subsequently, in the pipe-related symbol automatic recognition block 23, pipe-related symbols such as valves and pumps are automatically extracted from the image data remaining without being deleted, and the figure recognition is performed by using, for example, a pattern matching technique. Work is done. The result is displayed on the display device as shown in FIG. Further, in the symbol / line segment automatic connection processing block 24, the automatic connection processing is performed based on the positional relationship between the line segment such as piping and instrumentation line and the symbol. The result is also displayed on the display device as shown in FIG. Here, various techniques are already known to those skilled in the art for the pattern matching technique, the line tracking extraction technique, the symbol extraction technique, and the symbol recognition technique used, and the details thereof will not be described here.

Subsequently, in block 25, the acquired graphic data, that is, the character string, the symbol and the vector data are modified interactively on the CRT screen.
The corrections executed here include correction of misrecognition, correction of vector distortion, correction of connection processing, and the like. With this modification, P
This means that all the data related to the graphic described in && has been input. At this point, it is also possible to plot out the graphic data and further check the drawing details on the paper.

After the above processing is completed, the logical information recognition block 13 shown in FIG. 1 is entered. This logical information recognition block 1
The detailed algorithm of No. 3 is shown in FIG. Symbol recognition /
With respect to the graphic data acquired in the geometric correction block 12, first, in block 31, recognition of a composite symbol is performed. In this composite symbol recognition block 31, instead of a composite symbol, that is, a single symbol,
Correspondence between symbols of a type capable of executing a certain function is recognized by a plurality of symbols. Correspondence of the composite symbols is made clear to the operator by, for example, changing the color of the symbols displayed on the display device. In this way, for example, the drive unit such as the MO valve and the AO valve and the valve body are recognized as a composite symbol. Then, in block 32, large symbol recognition is performed. Generally, P & IDs for nuclear power plant facilities include hundreds of types of various symbols as described above, but in addition to these, indeterminate types such as reactors and heat exchangers showing considerably different modes for each plant. The symbol is included. In the large symbol recognition block 32, an irregular symbol that is not included in the regular symbols is recognized. Subsequently, in block 33, logical information recognition is performed. That is, in this block, the association between the tag number and the symbol, the correspondence of various functions to notes and detailed views, etc. are logically associated, and the graphic data is structured and processed to include logical information, It is possible to make advanced use of drawing resources. Further, the data is subjected to a clean copy process in block 34, and the jump position and the symbol-corresponding character string position are corrected to improve the clear copy accuracy. The result is displayed on the display device as shown in FIG.

Finally, at block 35, all data entered so far, including logical information, is interactively checked and modified. It is also possible to plot out the graphic data at this point, further check the details of the drawing on the paper, and make further corrections based on the result. The acquired structured graphic data is stored in an external storage device (see 14 in FIG. 1) or the like, constitutes a database, and enables unified management and advanced use of drawing resources.

[0026]

Since the present invention is configured as described above, first, based on the image data displayed in the background image,
Interactive input allows input of character strings and symbols that are difficult to perform automatic recognition processing and / or suitable for interactive input.
Since the image data related to the input character strings and symbols is deleted, the subsequent automatic recognition processing and logical information recognition processing can proceed more smoothly and at high speed, greatly reducing the time and cost required for input processing. It can be reduced. Further, in the present invention, by suitably combining the batch processing and the interactive processing as described above, it is possible to reduce the input man-hour as compared with the conventional system, and moreover, it is possible to input easily. Even a beginner operator can handle it sufficiently. Further, according to the present invention, it is possible to easily and accurately input a P & ID drawing resource including hundreds of kinds of symbols and various sizes thereof, and further an indeterminate large symbol. . Further, according to the present invention, a structured CAD database can be easily constructed, unified management and advanced use of drawing resources are possible, and particularly when applied to P & ID for nuclear power plant equipment, the nuclear power plant It is possible to improve the reliability of the maintenance.

[Brief description of drawings]

FIG. 1 is a block diagram outlining one embodiment of an automatic input system or method according to the present invention.

2 is a flow chart showing an algorithm implemented in the symbol recognition geometric modification block of the automatic input system or method shown in FIG.

3 is a flow chart illustrating an algorithm implemented in a logical information recognition block of the automatic input system or method shown in FIG.

FIG. 4 schematically shows an image displayed on a display device at each step of the system or method according to the present invention.

[Explanation of symbols]

10 ... manuscript drawing 11 ... Drawing input / vectorization block 12 ... Symbol recognition / geometric correction block 13 ... Logical information recognition block 14 ... Storage device 15. Man-machine interface

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Keiji Todoroki             7-1,4-305 Fujiwara, Funabashi City, Chiba Prefecture (72) Inventor Toshiyuki Ogiri             1-12-8-403 Masago, Chiba-shi, Chiba (72) Inventor Motohashi Ohashi             2-10-14-302 Saiwaicho, Chiba City, Chiba Prefecture

Claims (4)

[Claims] 1. A target drawing is scanned to acquire image data,
While displaying the image data as a background image, an interactive input enable area is specified to input an interactive input enable target in the interactive input enable area, and image data in the interactive input enable area is deleted. , Figure automatic data recognition processing and figure automatic connection processing are performed on the remaining image data to obtain figure data, interactive correction processing is performed on the obtained figure data, and the interactively corrected figure data is obtained. A method for automatically inputting a drawing, comprising: performing logical information automatic recognition processing to obtain structured graphic data, and performing interactive editing processing on the structured graphic data. 2. The target drawing is a P & N for nuclear power plant equipment.
The method of claim 1, wherein the method is an ID. 3. A drawing input means for scanning an object drawing to generate image data, an image display means for displaying a background image of the image data, and the image displayed as a background image on the image display means. Man-machine interface means for designating an interactive input enable area based on data and inputting an interactive input enable target in the interactive input enable area, and in response to the input of the interactive input enable target , First processing means for arranging the interactive input enable target data in the interactive input enable area, deleting the image data in the interactive input enable area, and a graphic for the remaining image data Second processing means for performing automatic recognition processing and automatic graphic connection processing to obtain graphic data, and third processing means for performing interactive correction processing on the graphic data.
And a fourth processing means for performing a logical information automatic recognition process on the interactively modified graphic data to obtain structured graphic data, and a dialogue with the structured graphic data. A drawing input system comprising: fifth processing means for performing a type editing process; and storage means for storing the interactively edited structured graphic data. 4. The target drawing is a P & N for nuclear power plant equipment.
Method according to claim 3, characterized in that it is an ID.