JPH03271871A - Segment data processing system - Google Patents

Abstract

PURPOSE:To shorten the processing time by storing each information of coordinate lattice lines on the same line in a segment information table and performing the segment coupling processing. CONSTITUTION:A data size setting means 24 recognizes an analysis area division number (m) in the X direction, and a processing frequency setting means 25 recognizes an analysis area division number (n) in the Y direction. A data read means 21 reads out data of a first segment based on the instruction of the data size setting means 24, and data of coordinate lattice lines in the X direction is stored in the first position of an analysis result data file 4, and data of first m-number of lines is read out and is stored in a segment information table 22. A segment coupling means 23 performs the segment coupling processing of coordinate lattice lines, and a data output means 27 outputs contents of the segment information table 22 to a CAD data base 5 when there are no segments to be coupled, and a processing frequency counting means 26 counts the frequency in processing. Thus, the processing speed is increased.

Description

[Detailed Description of the Invention] [Summary] Regarding a line segment data processing method that converts line segment data of a figure used for analysis simulation into a CAD database format, line segment data sent from an analysis simulator is converted into a CAD database format. The CAD system has a means for reading out an analysis result data file, and line segment information in which line segment information including coordinate grid line information is stored among the data read by the analysis result data file. a table; means for recognizing division number information and setting the number of coordinate grid lines that the data reading means stores in the line segment information table at one time to a number equal to the number of divisions in one direction; and the division number information. means for setting the number of times the line segment information is stored in the line segment information tiple to the number of divisions in a direction intersecting the one direction, and means for counting the number of times the line segment information is stored and comparing it with the set number of times. and a means for combining the two line segments when a line segment having a common end point with an arbitrary line segment in the line segment information table in the same direction is found; means for storing the contents of the line segment information table in a CAD database when the combination of shared line segments is completed; and processing for reading the coordinate grid lines from the data file and storing them in the line segment information table. , a process of combining coordinate grid lines that are on the same line on the line segment information table, and a process of CADing the contents of the line segment information table after the combining process is completed.
The process of storing in the database is repeatedly executed until the number of times set by the process count setting means is reached.

(Industrial Application Field) The present invention relates to a line segment data processing method for converting graphic line segment data used in analysis simulation into a CAD database format.

In recent years, in order to improve work efficiency in fields such as structural design,
CAE (in a narrow sense, simulation by analysis) is being actively adopted. It is desirable that the analysis results obtained from various analyzes be unified and managed in one database.

For this reason, the graphical data of the analysis result data is converted into a CAD database data format and stored in the database, but as the amount of processed data increases, it is desired to speed up this conversion process. .

[Conventional technology]

In order to obtain highly accurate results in thermal fluid analysis for structural design, analysis is often performed using an analysis program using methods such as the finite difference method.

In this analysis program using the difference method, a plurality of coordinate grid points and coordinate grid lines connecting the coordinate grid points are created in the target analysis area. This coordinate grid line divides v
The number of grid regions to be 1 is arbitrarily set by the operator to an optimal number depending on the object of analysis.

In order to manage the graphic data among the analysis execution results, the graphic data is often input into a CAD database. This analysis simulator and CAD
An example of the configuration of a system composed of a database is shown in the fourth example.
As shown in the figure.

In the figure, 1 is an analysis simulator, and 2 is a CAD system. 3 is a data file to be analyzed, 4 is a data file of analysis results, and 5 is a CAD database.

The CAD system 2 includes a data reading means 21 that reads data from an analysis result data file, a line segment information table 22 that stores information on coordinate grid lines among the read data, and a line segment information table 22 that stores information on coordinate grid lines among the read data. Line segment joining means 2 for joining two line segments that are on the same line within minutes
3, and data output means 27 for outputting the contents of the line segment information table 22.

The analysis simulator 1 reads data from the data file 3 to be analyzed and performs a simulation. File 3 of analysis result data output from analysis simulator 1
The data reading means 21 of the CAD system 2 reads information on the coordinate grid lines forming one side of the grid area (coordinate grid points forming the end points), and generates line segment information using these two coordinate grid points as the starting point and ending point of the line segment. Stored in table 22.

However, if all sides of the lattice area are treated as line segment information, the amount of data stored in the CAD database 5 will become enormous. Therefore, the line segment information stored in the line segment information table 22 is combined by the line segment combining means 23.

This line segment joining process will be explained in detail using FIG. 5.

As described above, the data reading means 21 reads out all coordinate grid line data from the analysis result data file and stores it in the line segment information table (processing 1).

The line segment combining means 23 extracts the line segment stored in the first record in the line segment information table 22, and searches for a line segment with the same end point (process 2). A second line segment that shares the end point is extracted. When the second line segment data of the first line segment is discovered,
The coordinate values of the common point of the second line segment are deleted and updated with the coordinate values of the end points that are not the common point of the second line segment (processing 3). In the example of Figure 4, the first line segment (starting point is at the coordinates (XAI, YBL)
), the end point is the coordinate (XCI, YDI))) and the second line segment (the start point is the coordinate (XA2. YB2), the end point is (XC2, YB2)') is found, and the end point is the coordinate (XCI, YDI)). From the record of the end point coordinates (XCI.

YDI) (same as coordinates (XA2.YB2)) and updated to coordinates (XC2°YB2), which is the end point of the second line segment.

The data of the second line segment is then deleted from the line segment information table 22. (Process 4) The above processes 1 to 4 are repeated to execute the process of joining line segments having a common point, and if a line segment having a common point is not found in the graphic process 1, the data output means 27 The contents of the minute information table 22 are written to the CAD database 5 (processing 5).

[Problem to be solved by the invention]

However, as mentioned above, in the conventional line segment combination processing, all the coordinate grid line information read from the analysis result data file 4 is stored in the line segment information table 22, and all the stored line segment information is brute-forced. The search process (process 2 above) for line segments that can be connected is performed. For this reason, it takes a very long time to execute line segment joining processing and input graphic data into a CAD database.

The object of the present invention is to speed up the line segment joining process executed when storing line segment data sent from an analysis simulator in a CAD database.

[Means to solve problems]

In order to solve the above problems, the graphic data processing method of the present invention creates a plurality of coordinate grid points and coordinate grid lines connecting those coordinate grid points in the target analysis area in order to perform an analytical simulation of a physical phenomenon. Then, the analysis region is divided into a plurality of small regions using the coordinate grid lines, and the analysis simulation is executed, and the information on the number of divisions of the analysis region for each division direction and the coordinate grid lines are set in the same direction. And from an analysis simulator that outputs coordinate grid line information aligned for each line segment on the same line in an analysis result data file, the output format of the analysis result data is converted and CA
In a CAD system stored in a D database, the CAD system includes means for reading out the analysis result data file, and a line in which line segment information including information on the coordinate grid lines is stored among the data read by the analysis result data file. means for recognizing the segment information table and the division number information and setting the number of the coordinate grid lines that the data reading means stores in the segment information table at one time to a number equal to the number of divisions in one direction; means for setting the number of times that line segment information is stored in the previous line segment information table to the number of divisions in a direction intersecting the one direction based on the number of division information; means for comparing, means for searching for and finding a line segment having a common end point with any line segment in the line segment information table in the same direction, and combining the two line segments; and the line segment combining means. means for storing the contents of the line segment information table in a CAD database when the connection of line segments sharing end points is completed, and reading the coordinate grid lines from the data file and storing them in the line segment information table. the process of combining the coordinate grid lines on the same line on the line segment information table; and the process of storing the contents of the line segment information table in the CAD database after the combining process is completed. The processing is repeated until the number of times set by the processing number setting means is reached.

[Effect]

Since the coordinate grid lines output from the analysis simulator are output to the analysis result file on the same line, the CAD system calculates the number of divisions of the area (for example, if an orthogonal grid is used, how many in the X direction and how many in the Y direction are If you set the number of coordinate grid lines to be stored in the line segment information table based on the number of divisions in the same direction, all line segments can be searched brute force during line segment merging processing. The processing speed is faster than when line segment joining processing is performed using

In addition, the number of times of a series of processes in which the coordinate grid lines are combined by storing them in the line segment information table and the line segment information resulting from the combination is stored in the CAD system is set to the number of divisions in the direction that intersects the same direction as described above. Then, all the line segments in the same direction can be combined.

〔Example〕

An embodiment of the present invention will be described with reference to FIGS. 1 to 3.

FIG. 1 is a diagram showing the system configuration of an embodiment of the present invention, FIG. 2 is a diagram showing graphic display in a simulation of differential analysis, and FIG. 3 is a diagram showing graphic processing in the system of FIG. It is a figure explaining a flow.

The system configuration of an embodiment of the present invention will be explained using FIG. 1. 1 is an analysis simulator, which executes an analysis simulation of a physical phenomenon using the difference method on the data to be analyzed in 3 and outputs analysis result data 4. It is something to do. 2 is a CAD system that reads graphic data from the analysis result data 4 and converts it into a CAD data format;
This is stored in the CAD database 5.

The CAD system 2 has a data reading means 2 that reads the analysis result data file 4 in the same manner as before.
1, a line segment information table 22 that stores coordinate values of end points as line segment information, a line segment combining means 23 that performs a process of combining line segments on the line segment information table 22, and a line segment information table 2.
In addition to the data output means 27 for outputting the contents of 2 to the CAD database 5, the line segment information table 22 is newly added to the line segment information table 22 from the information on the number of divisions of the analysis area in the analysis result data.
The data size determining means 24 sets the number of coordinate grid lines to be stored in the CAD, and the data written in the line segment information table 22 is processed based on the information on the number of divisions of the analysis area.
a processing number setting means 25 for setting the number of times of a series of line segment joining processes until storage in the database 5; and a processing number 26 for counting the number of times of the above series of line segment joining processes and comparing it with the set number of times. A counting means is added. Note that the actual hardware configuration includes line segment combination processing means 23,
The data size determining means 24, the number of processing times setting means 25, and the number of processing times counting means 26 are realized by a CPU running on software having equivalent functions, and the data reading means 21 and the data outputting means 27 correspond to input/output devices.
The line segment information table No. 22 is developed on the memory.

Next, the differential analysis executed by the analysis simulator 2 of this embodiment will be explained using FIG.

Differential analysis is an analysis method that divides the region to be analyzed into many small regions using orthogonal line segments and collects the state of each small region.

Figure 2 (a) is an example of analyzing the influence of wind flow on obstacles, and as shown in Figure 2 (b), the analysis area is defined by orthogonal coordinate grid lines in m in the X direction. pieces, X
Divide into n pieces in the direction. The coordinate grid points and coordinate grid lines are created by means of the analysis simulator 1 that divides the target area.

The graphic data divided by the orthogonal grid has coordinate grid points (four points) that form the vertices of the divided small areas. Four coordinate grid lines are found from these four coordinate grid points. That is, mXnX four line segment data are generated from the coordinate grid points of all the divided small areas.

This line segment data is subjected to the following processing by an analysis simulator as shown in FIG.

(2) Check the coordinates of the endpoints at both ends of each line segment data and classify it into line segment data parallel to the X-axis direction and line segment data parallel to the Y-axis direction.

■ Classify into line segments on the same line. This is classified by checking the Y coordinate of the end point if it is a line segment in the X-axis direction, and by checking the X-axis direction of the end point if it is a line segment in the Y-axis direction. Furthermore, the classified line segments are sorted in order of the smallest coordinate value on each line.

■ Since the line segments forming the boundaries of adjacent small areas overlap, they are deleted and set as - line segment data.

Through the above processing, data on the coordinate grid lines becomes data on the same line and is stored in the analysis result data file 4.

Information on the division unit (mXn) of the small area is also stored in the analysis result data file 4.

The CAD system 2 reads the coordinate grid line data from this analysis result data file 4, and performs a process of combining the coordinate grid lines divided for each coordinate grid point into the same line segment and storing it in the CAD database.

First, the CAD system 2 reads division information of the analysis area by the data reading means 21 and sends it to the data size setting means 24 and the processing number setting means 25. In this embodiment, first, the data size setting means 24 recognizes the number of analysis region divisions m in the X direction, and the processing number setting means 25 recognizes the number n of analysis region divisions in the X direction.

The data reading means 21 accesses the analysis result data file 4 based on the instruction from the data size setting means 24 and reads the data of the first line segment.

Since the data of the coordinate grid lines in the X direction is stored at the beginning of the analysis result data file 4, data up to one line from the beginning is first read out and stored in the line segment information table 22.

Next, the line segment combining means 23 performs line segment combining processing on the coordinate grid lines stored in the line segment information table 22. This line segment joining process is the same as the line segment joining process (shown in FIG. 5) described above as the conventional technique.

Since the data stored in the line segment information table 22 are aligned on the same line by the analysis simulator 1 as described above, they will ultimately be combined into one straight line. In this way, when line segments that can be combined are no longer found in the search process (process 2 in FIG. 5), the data output means outputs the contents of the line segment information table 22 to the CAD database, and the process number counting means 26 counts the number of processes. Count.

When the second connection is completed, the data reading means 21 reads out the next coordinate grid line data from the analysis result data file 4, performs line segment connection processing according to the sequence shown in FIG. 4, and outputs it to the CAD database 5. This series of combination processing is repeated until the processing number counting means 26 recognizes that the processing has been performed n times.

Next, processing for joining the coordinate grid lines in the Y-axis direction is executed. The data size setting means 24 determines the size of data to be stored in the line segment information table at one time based on the number n of region divisions in the Y-axis direction, and the processing number setting means 25 sets the number m of region divisions in the X-axis direction as the number of processing times. do. Data reading means 21
reads eight coordinate grid line data from the analysis result data file 4, stores it in the line segment information table 22, performs line segment combining processing by the line segment combining means 24, and outputs it to the CAD database 5. This series of processing is counted by the processing number counting means 26, and is repeated m times to complete the line segment joining processing in the Y-axis direction.

〔Effect of the invention〕

As explained above, according to the present invention, each piece of information about coordinate grid lines on the same line is stored in the line segment information file,
In order to perform line segment combination processing, all line segment data is stored in the line segment information table, and the processing time can be significantly reduced compared to performing searches in line segment combination processing using brute force. can.

[Brief explanation of drawings]

Fig. 1 is a diagram showing the configuration of an embodiment of the present invention, Fig. 2 is an explanatory diagram showing differential analysis, Fig. 3 is an explanatory diagram of graphic processing in the system of Fig. 1, and Fig. 4 is an illustration of the conventional system. An explanatory diagram of the system configuration, Figure 5 is a CAD
FIG. 3 is an explanatory diagram of line segment joining processing in the system. In the figure, ■... analysis simulator, 2... CAD system, 3... analysis target data, 4... analysis result data, 5... CAD database, 21... data reading means, 22. ... line segment information table, 23 ... line segment integration means, 24 ... data size determination means, 25 ...
Data processing number setting means, 26... Data processing number counting means, 27... Data outputting means. (a) Diagram showing the analysis area before division (b) Diagram showing the analysis area after division Explanatory diagram showing an example of finite difference analysis Figure 2 O

Claims (1)

[Scope of Claims] In order to perform an analytical simulation of a physical phenomenon, a plurality of coordinate grid points and coordinate grid lines connecting these coordinate grid points are created in a target analysis region, and the coordinate grid lines are used to define the analysis region. The analysis simulation is performed by dividing into a plurality of small regions, and the information on the number of divisions of the analysis region for each division direction and the coordinate grid lines are aligned for each line segment that is in the same direction and on the same line. From an analysis simulator that outputs coordinate grid line information in an analysis result data file, convert the output format of the analysis result data and perform CA.
In a CAD system stored in a D database, the CAD system includes a means for reading the analysis result data file, and a line segment in which line segment information including information on the coordinate grid line is stored among the data read by the analysis result data file. an information table; means for recognizing the division number information and setting the number of coordinate grid lines that the data reading means stores in the line segment information table at one time to a number equal to the number of divisions in one direction; means for setting the number of times to store line segment information in the line segment information table to the number of divisions in a direction intersecting the one direction based on number information, and counting the number of times to store the line segment information and comparing it with the set number of times. means for searching for and finding a line segment having a common end point with any line segment in the line segment information table in the same direction, and combining the two line segments; and means for storing the contents of the line segment information table in a CAD database when the connection of line segments sharing end points is completed, and reading the coordinate grid lines from the data file and storing them in the line segment information table. processing, processing for combining coordinate grid lines on the same line on the line segment information table, and processing for storing the contents of the line segment information table in the CAD database after the completion of the combining processing. A line segment data processing method in a CAD system, characterized in that the process is repeatedly executed until the number of times set by a number of times setting means is reached.