KR100329817B1 - System For Extracting Shape And Location Information Of Two Dimension CAD And Method Thereof - Google Patents

Abstract

The present invention is a two-dimensional CAD for automatically extracting the actual data of the basic contour and portion-specific shape information of the drawing data in order to accurately calculate the quantity and unit cost for the data of the CAD design drawing created by the two-dimensional CAD program A stereo pattern extraction system and a method thereof are provided.

To this end, the present invention is a computer equipped with a two-dimensional CAD system for creating a two-dimensional CAD drawing for various construction or manufacturing by the operation of the keyboard and the position coordinate input device by the operator, by the input operation of the operator Variable storage means for receiving and storing variable information for contour definition of the two-dimensional CAD drawing, and in the drawing information of the two-dimensional CAD drawing completed through the two-dimensional CAD system based on the variable information from the variable storage means. Point and line information is extracted by line analysis, and the shape and position calculation means which calculates shape and position information of a space and a member by a basic outline with reference to the point information and line information is characterized by the above-mentioned.

Description

System For Extracting Shape And Location Information Of Two Dimension CAD And Method Thereof}

The present invention relates to a two-dimensional CAD system, and more particularly, the shape and position information of the line contour that is the basis of the calculation of materials and objects among the drawing data included in the two-dimensional CAD drawing is automatically generated. The present invention relates to a system and method for extracting shape and position information of a two-dimensional CAD for calculation.

As is well known, in order to build, expand, or reconstruct various structures, civil works, or structures necessary for the construction, manufacture, or production of structures, detailed design work such as structural drawings, architectural drawings, and facility drawings are required. First of all, a two-dimensional CAD program built in a computer system is generally used to create such a design drawing.

In addition, when the CAD program is executed and the detailed design work is completed, the statement work on the data included in the drawing is performed prior to the delivery of the CAD design drawing. The information included in the design drawings must be analyzed for a long time, and the quantity and unit price of each material must be calculated.

In order to calculate the quantity and unit price for each material included in the CAD design drawing, the operator manually compares and analyzes the relations of the drawing data created in the plurality of design drawings, respectively, based on the entity of the drawing. It is to calculate the numerical value of the material and to calculate the material based on the numerical information.

However, in the method of calculating the quantity and unit price of CAD design drawings prepared through the conventional CAD program, the operator can extract the necessary material information by analyzing the correlation of the drawing data for a plurality of design drawings. As a result, there is a problem that maximization of time and cost loss is inevitable as a large number of workers have to work for a long time.

In addition, since most architectural drawings and structural drawings created in CAD design drawings are expressed in an abstract form such as floor plans, elevations, and cross-sectional views, it is difficult to create three-dimensional information because one member and space are divided. Artificially analyzing the drawing information of the blueprint is to be able to input numerical information by hand, there is a problem that it is difficult to calculate the exact quantity and unit price.

Accordingly, the present invention has been made to solve the above-described problems, and an object thereof is to calculate the three-dimensional information of the CAD design drawing created by the two-dimensional CAD program, and to calculate the basic contour of the drawing data, the shape information and the position information. To provide a two-dimensional CAD shape and position information extraction system for automatic extraction.

Another object of the present invention is to provide a two-dimensional CAD for automatically extracting the basic outline of the drawing data as shape and position information for accurate calculation of the quantity and unit price for the data of the CAD design drawing created by the two-dimensional CAD program. It is to provide a shape and location information extraction method.

1 is a block diagram showing the configuration of a two-dimensional CAD shape and location information extraction system according to the present invention;

2A and 2B are diagrams illustrating an environment setting state for extracting wall and bollard lines of an architectural drawing as an example of extracting shape and position information according to a preferred embodiment of the present invention;

3A to 3D are diagrams illustrating a process of extracting shape information of walls and columns of an architectural drawing as an example of extracting shape and location information according to a preferred embodiment of the present invention;

4 is a flowchart illustrating a method of extracting shape and position information of a two-dimensional CAD according to the present invention.

<Description of the symbols for the main parts of the drawings>

10: two-dimensional CAD system, 20: CAD drawing data,

30: variable storage unit, 40: shape and position calculation means,

50: line extraction block, 60: dot / line extraction block,

70: contour extraction block, 80: shape information calculation block,

100: computer body, 200: keyboard,

300: Position coordinate input device, 400: Display monitor.

According to the present invention for achieving the above object, in a computer equipped with a two-dimensional CAD system for creating a two-dimensional CAD drawing for a variety of construction or manufacturing by operation of the keyboard and the position coordinate input device by the operator, Variable storage means for receiving and storing variable information for contour definition of the 2D CAD drawing by the operator's input operation, and 2 completed through the 2D CAD system based on the variable information from the variable storage means. Shape and position information calculating means for extracting point information and line information from the drawing information of the dimensional CAD drawing by line analysis, and calculating the shape and position information of the space and the member by basic contours with reference to the point information and line information. A shape and location information extraction system of a two-dimensional CAD is provided.

According to the present invention configured as described above, in order to calculate the quantity and unit price of the material contained in the CAD drawing created through the two-dimensional CAD program, the basic contours included in the drawing without the manual drawing analysis of the operator By being able to extract automatically, it is possible to drastically shorten the work time and reduce the cost, and have the advantage that it can be used as reference information for calculating more accurate quantities and unit costs.

Hereinafter, the present invention configured as described above will be described in detail with reference to the accompanying drawings.

That is, Figure 1 is a block diagram showing the configuration of the shape and position information extraction system of the two-dimensional CAD according to the present invention.

As shown in FIG. 1, according to the present invention, buildings, structures, and the like, which are related to various construction, civil engineering, machinery, and facility fields, are provided in a two-dimensional CAD design drawing through a two-dimensional CAD program built in a personal computer terminal or a workstation. Once created, the area and material of the architectural or structural drawings included in the two-dimensional CAD design drawing are extracted, and the quantity and unit price are calculated based on the extracted area and material information to prepare a statement.

To this end, in the present invention, by automatically extracting the basic outline of the architectural or structural drawings of the two-dimensional CAD design drawings, it is possible to extract the shape and position information for the space and various members.

However, the contour of the shape and location information defined in the present invention is the total area and the area of each area inherent in the architectural or structural drawings of the two-dimensional CAD design drawing, and when the kind and numerical value of the material is practically constructed and constructed. The term 'contour' should be used in the sense of line information with an exact number, because it must be applied correctly.

In addition, the shape and position information corresponds to the basic information for the shape of the space, wall, column, beam, etc. in which a two-dimensional CAD drawing is represented, and when the information is a wall, it indicates a length value, and when it is a column ( X, Y) value, and when visible, X, Y value.

In the present invention according to the drawings, the drawings necessary to construct buildings or structures in various fields of construction, civil engineering, machinery, and facilities are prepared through a two-dimensional CAD program, and the architectural drawings or structural drawings created on the two-dimensional CAD design drawings. Computer operation 100 for automatically extracting contours as shapes and positional information of spaces and members, user operations for creating two-dimensional CAD design drawings and contour extraction operations of drawing data. A keyboard 200 for performing the operation, a position coordinate input device 300 called a 'mouse device' for selecting and executing a menu by moving a cursor on the screen, and a CAD design performed by the computer main body 100. The display monitor 400 visually displays the progress of the drawing operation and the contour extraction operation of the drawing data.

The computer main body 100 includes a two-dimensional CAD system 10, a variable storage unit 30, a shape and position calculation unit 40, a keyboard interface 200A, and a position coordinate interface 300A.

The two-dimensional CAD system 10 of the computer main body 100 incorporates CAD program software such as Auto CAD, and generates a CAD program according to the operation of the keyboard 200 and the position coordinate input device 300. By execution, two-dimensional CAD drawing data 20 having a file format of, for example, 'DWG' or 'DXF' is generated.

In addition, the variable storage unit 30 is configured to extract an actual outline of a line entity included in the CAD drawing data 20 by manipulation of the keyboard 200 and the position coordinate input device 300. Save the variable to be set.

In addition, the shape and position calculation means 40 in the computer main body 100 is configured with the configuration of the contour extraction function by the variable information of the variable storage unit 30, the drawing information of the CAD drawing data 20 This is to extract the basic outline for calculating the material, quantity and unit price of the material.

The keyboard interface 200A is to interface an operation signal generated according to the operation of the keyboard 200, and the position coordinate interface 300A is a coordinate input generated according to the operation of the position coordinate input device 300. And to interface the signal.

Here, the shape and position calculation means 40 is composed of a line extraction block 50, a dot / line extraction block 60, a contour extraction block 70, and a shape information calculation block 80.

In the shape and position calculation means 40, the line extraction block 50 is for extracting an object having a line shape by analyzing the drawing information included in the CAD drawing data 20, having a single straight shape It is possible to extract both a general line and a polyline formed by connecting a plurality of lines having different extending directions from each other.

In addition, the dot / line extraction block 60 refers to line extraction information of the CAD drawing data 20 extracted from the line extraction block 50, and in the vertical direction or the horizontal direction of the CAD drawing data 20. By performing the scanning of the extracted point information and line information estimated as an outline.

The contour extracting block 70 analyzes point information and line information for estimating the contour extracted from the dot / line extracting block 60, and numerical information corresponding to the variable information from the variable storage unit 30. Contour information (eg, when the drawing information of the CAD drawing data 20 is a building, a wall line or a gird line (Girder Line)) is extracted.

In addition, the shape information calculation block 80 is a standardized shape having the area and material information of the architectural or structural diagram included in the CAD drawing data 20 according to the contour information extracted from the contour extraction block 70. Information (for example, when the drawing information of the CAD drawing data 20 is a building, information of a wall, a girder, and a pillar) is calculated.

2A and 2B are diagrams illustrating an environment setting state for extracting wall lines, beam lines, and pillars of an architectural drawing as an example of extracting shape and position information according to a preferred embodiment of the present invention.

As shown in Figs. 2A and 2B, as the embodiment of the present invention, when the CAD drawing data 20 is drawing information of a building such as an apartment or a business building, the shape and position calculating means ( 40, a user of the keyboard 200 and the position coordinate input device 300 for setting an environment for calculating an outline, that is, a wall line, a beam line, and a pillar in a building drawing included in the CAD drawing data 20. The operation of inputting a variable (Value) and storing it in the variable storage unit 30 is performed by the manipulation. The process of the variable input operation is visually displayed on the display monitor 400.

According to FIG. 2A, the variable input by the keyboard 200 and the position coordinate input device 300 and stored in the variable storage unit 30 is the maximum value max of the wall line interval A1 and the length of the wall line. The minimum value min of (B1), the maximum value of wall line connection C1, and the wall line extension length D1 are included.

As shown in FIG. 2B, the variable inputted by the keyboard 200 and the position coordinate input device 300 and stored in the variable storage unit 30 is the maximum value of the line thickness A2 and the line length ( The minimum value of B2), the maximum value of the wire connection (C2), and the extension length of the wire (D2).

3A to 3D are diagrams illustrating a process of extracting wall lines, beam lines, and columns of an architectural drawing as an example of extracting shape and position information according to a preferred embodiment of the present invention.

As shown in FIG. 3A, in the line extraction block 50 of the shape and position calculation means 40, two points P1 and P2 located on the same line among the objects of the building drawing created in the CAD drawing data 20. By searching for the straight line l1 estimated by (), a line L in a general straight state is extracted.

In addition, the line extraction block 50 extracts the first straight line pl1 and the third straight line pl3 respectively estimated by the two points P3 and P5 (P4 and P6) located on the same line, respectively. The first straight line pl1 and the first straight line pl1 connected by the points P1 to P6 are extracted by extracting a second straight line pl2 estimated by connecting the point P5 and the point P6 on a vertical line. The polyline PL is extracted by the combination of the two straight lines pl2 and the third straight line pl3.

3B, the CAD drawing data 20 is scanned in the vertical direction or the horizontal direction in the dot / line extracting block 60, thereby scanning the CAD drawing data 20. With reference to the normal line L and the polyline PL (refer to FIG. 3A) extracted from the line extraction block 50, the scanning normal SC generated by starting scanning from the starting point CP, respectively. Point information and line information are extracted.

In FIG. 3B, the process of extracting the point information and the line information from only the general line L excluding the polyline PL is described. However, the estimation of the contour line from the general line L for the polyline PL is also described. Of course, it can proceed similarly to the method of extracting the point information and line information.

In FIG. 3B, the point / line extraction block 60 completes a segment having line information (that is, a line segment connecting the points) by connecting a plurality of points extracted from the scanning normal SC. From the variable information stored in the variable storage unit 30, a line segment (l2, l3) satisfying the maximum value of the gap between the wall line or the beam, the column, the minimum length, the maximum connection length, and the extension length ( In addition to l4 and l5, the line segment l6 by the connection of each point existing within a predetermined angle even if not satisfied with the input value of the variable information, and the line segment having the same length condition as the variable information even if not in plurality ) And line segments L8 and L9 in which a plurality of compatible constant intervals are maintained are also extracted.

As shown in FIG. 3C, the contour extraction block 70 of the shape and position calculation means 40 is based on the segment of the point information and the line information extracted from the point / line extraction block 60. As shown in FIG. 3B, a center line is drawn for the interval between the plurality of line segments L2 to L9 extracted as shown in FIG. 3B, and the centerline is extracted. From the above variables, mutually compatible line segments are extracted to satisfy the maximum distance, the minimum length, the maximum connection length, and the extension length of the wall line or the beam line.

That is, as illustrated in the drawing, the contour line extracted by the contour extraction block 70 is segmented by the line segments l2 and l3 partitioned by the first center line cl1 and the second center line cl2. (L4, L5) are mutually compatible with line segment spacing AA1 which satisfies the space | interval maximum of a wall line, respectively, and are extracted as a wall line of a building. On the other hand, in the case of the line segments g1 and g2 divided by the third center line cl3, the line segments g1 and g2 are mutually compatible with the line segment interval AA2 satisfying the maximum interval of the complementary line. It is extracted as the beam of the building.

Next, as shown in FIG. 3D, the shape information calculation block 80 may determine the object of the CAD drawing data 20 based on the contour line extracted from the contour extraction block 70, that is, the wall line and the beam line. In the case of a building, the wall information (W) is calculated by analyzing the wall line, and the beam information (G) is calculated by analyzing the beam line. The slab information SLB can be calculated by connecting the wall line and the beam line to calculate the area.

The shape information calculation block 80 may also calculate polyline wall information PLW by analyzing a wall line related to the polyline among the wall lines calculated by the contour extraction block 70.

Next, the operation of the present invention made as described above will be described in detail with reference to the flowchart of FIG. 4.

First, in the present invention, an operation of extracting a wall line as an outline from an example of a building such as an apartment or a business building will be described with reference to the flowchart of FIG. 4.

That is, when two-dimensional CAD drawing data 20 is created by utilizing the two-dimensional CAD system 10 of the computer main body 100 by manipulating the keyboard 200 and the position coordinate input device 300 by an operator. (Step S10), in the state where the variable information about the wall line is stored in the variable storage unit 30 according to the operator's input operation, the line extraction block 50 of the shape and position calculation means 40 in the two-dimensional CAD drawing In the drawing information of the building created in the data 20, a general line connected by a point and a point, and a polyline PLine in which the line and the line are multiplexed are extracted (step S11).

At this time, the point / line extraction block 60 sets the list information for the segment defined as an argument from the general line and the polyline extracted from the line extraction block 50 (that is, a line segment connecting two points). (Step S12), by sequentially scanning the CAD drawing data 20 along a normal line, a plurality of line segments are extracted based on the point information and the line information by selecting segments for the line with reference to the segment list ( Step S13).

Next, the dot / line extracting block 60 extracts the line segment if the length of the line segment is less than or equal to the variable based on the variable information stored in the variable storage unit 30 for the plurality of line segments by the selection of the line segments. By invalidating the line segments and merging the segments located on a straight line among the segments connected by the respective points, a parallel list (PList) of segments that are mutually parallel, i.e. (Step S14).

Further, in the point / line extraction block 60, the variable information of the variable storage unit 30 in the parallel list (PList) of the segment, that is, the maximum value of the wall line spacing, the minimum value of the length, the maximum value of the wall line connection, and the wall. The segment elements which do not satisfy the line extension length are removed and stored separately in an invalid list (OList), and only the segment elements of the list satisfying the variable information are arranged (step S15).

In this state, the contour extraction block 70 analyzes the segmented line elements and analyzes the separate invalid list to set the wall list GList that satisfies the formation of the wall (step S16). The wall center line is given from the wall list GList to set an actual wall line list RList that satisfies the maximum value of the wall line spacing among the variable information stored in the variable storage unit 30 (step S17).

As a result, the shape information calculation block 80 finally completes the wall having the actual numerical information based on the list of wall lines RList calculated from the contour extraction block 70, and connects the respective walls. The quantity and numerical information for each material are completed based on the area calculated by step S18.

Meanwhile, in the present invention made as described above, various modifications can be made without departing from the scope of the present invention and without departing from the gist of the present invention, for example, as illustrated in FIGS. 3A to 3D. Only the calculation of wall lines and beam lines for buildings such as business buildings, etc. has been described, but for example, various civil works such as roads and harbors, and manufacturing design fields for various medium / large machines and equipment, It is, of course, possible to be widely applied to the calculation of the basic outline required in the installation of equipment for various equipment such as cooling equipment.

As described above, according to the present invention, it is possible to automatically extract the contour of the object of the two-dimensional CAD drawing designed through the two-dimensional CAD program for the construction or manufacture of various construction, civil engineering, machinery, equipment field In addition, it is possible to complete the contour extraction task in a short time even with a small number of workers, thereby reducing costs and improving the accuracy of information.

In addition, in the present invention, it is possible to accurately calculate the numerical information for the contour in the CAD design drawings, has a particular effect that the operation of calculating the quantity and unit price of the various materials included in the drawings can be made more accurately.

Claims (9)

In a computer equipped with a two-dimensional CAD system for producing two-dimensional CAD drawings for various construction or manufacturing by operation of the keyboard and position coordinate input device, Variable storage means for receiving and storing variable information for contour definition of the two-dimensional CAD drawing by an input operation of the operator; Based on the variable information from the variable storage means, the point information and the line information are extracted by line analysis from the drawing information of the two-dimensional CAD drawing completed through the two-dimensional CAD system, and with reference to the point information and the line information. A shape and position information extraction system of a two-dimensional CAD, comprising a shape and position calculation means for calculating shape and position information of a space and a member by a basic outline. 2. The shape of the two-dimensional CAD according to claim 1, wherein the variable information of the variable storing means includes input information of the maximum value of the contour interval, the minimum value of the contour length, the maximum value of the contour connection, and the contour extension length. Location information extraction system. The method of claim 1, wherein the shape and position calculating means comprises: a block for extracting a general line connected by a plurality of points and a polyline in which a plurality of general lines are connected in multiple from the drawing information of the two-dimensional CAD drawing; A block for extracting segment elements of a line segment by analyzing point information and line information included in the two-dimensional CAD drawing based on the extraction information of lines and polylines, and satisfying the variable information of the variable storage means among the segment elements of the line segment And a block for extracting the contour, and a block for determining the final contour information by the extracted contour. The method of claim 3, wherein the shape and position calculating means is configured to divide a center line with respect to the plurality of line segments extracted from the two-dimensional CAD drawing, and extract a plurality of line segments that are parallel to each other as outlines. Geometry CAD Geometry and Geolocation Extraction System. 5. The two-dimensional CAD according to claim 4, wherein the shape and position calculating means extracts only segment elements of line segments satisfying the variable information of the variable storing means as outlines from a plurality of line segments which are mutually parallel. Shape and location information extraction system. In a computer equipped with a two-dimensional CAD system for producing two-dimensional CAD drawings for various construction or manufacturing by operation of the keyboard and position coordinate input device, Inputting variable information for defining the contour of the two-dimensional CAD drawing and storing it in variable storage means; Analyzing lines from the drawing information of the 2D CAD drawing created by the 2D CAD system, extracting point information and line information by the analyzed lines; Computing the shape and position information of the two-dimensional CAD, characterized in that for calculating the shape and position information for the space and the member by a basic outline with reference to the extracted point information and line information. The method of claim 6, wherein in the inputting and storing of the variable information, the variable information includes a maximum value of a distance to an outline included in the two-dimensional CAD drawing, a minimum length, a maximum connection value between the outlines, and an extension length of the outlines. Shape and position information extraction method of the two-dimensional CAD, characterized in that corresponding to the configuration information for. The method of claim 6, wherein the extracting the point information and the line information by analyzing the line comprises connecting a general line connected by a plurality of points in the drawing information of the two-dimensional CAD drawing, and a plurality of general lines connected to each other. Method for extracting the shape and position information of a two-dimensional CAD, characterized in that for extracting a polyline. The method of claim 8, wherein the calculating of the shape and position information of the space and the member by the contour line comprises: Analyzing the point information and the line information included in the two-dimensional CAD drawing based on the extraction information of the general line and the polyline to create a list of segment elements of the line segment defined in the form of an argument; Dividing a center line for a plurality of line segments from the segment element list of the line segment and extracting a plurality of mutually parallel line segments as outlines so as to satisfy the variable information of the variable storing means; And determining final contour information based on the extracted contour lines. 2.