JPH05151289A - Method and device for forming circular arc length measure - Google Patents

Abstract

PURPOSE:To make it possible to easily write circular arc length measure by simple operation and to sharply reduce operator's operation load. CONSTITUTION:A measuring point specifying part 14 and a measure line position specifying part 15 respectively allow an operator to specify a measuring point on a circular arc to which a circular arc length measure line is to be entered and a measure line entering position. An automatic judging part 18 is driven only when a 'parallel mode' for drawing out a measure auxiliary line vertically to the chord of the circular arc to be measured is specified by a mode specifying part 13, and when a measuring range defined by two specified measuring points is <180 deg. center angle of the circular arc to be measured, executes no operation, but when the range is >=180 deg., controls a write control part 17 to forcedly change the 'parallel mode' to a 'center mode' for radically drawing out the measure auxiliary line. The control part 17 writes circular arc length measure line data on drawing data displayed on a display 3 and stored in a memory 16.

Description

Detailed Description of the Invention

[0001]

The present invention relates to CAD (computer-aid).
The present invention relates to an ed design) system, and more particularly to an arc length dimension creating method and apparatus for writing arc length dimension lines in drawing data created by a CAD system.

[0002]

2. Description of the Related Art When using a CAD system, C
It is often the case that the length of an arc between two points on the circumference of a circle, an arc, a hole symbol, or the like, that is, the arc length dimension, is to be written in the drawing data created by the AD system. Conventional CA
The D system was not provided with a function of automatically writing the arc length dimension line. Therefore, conventional CA
If you want to write the arc length dimension in D system,
Similar to a normal figure, a dimension extension line drawn from both end points of the target arc and dimension lines along the target arc are drawn between these dimension extension lines to create the arc length dimension.

[0003]

As described above, in the conventional CAD system, the arc length dimension must be drawn or entered individually for the dimension line, the dimension extension line, the dimension value, etc. The operator was forced to perform a very complicated operation to write the arc length dimension.

The present invention has been made in view of the above circumstances, and the arc length dimension can be written in a proper form easily and easily by a simple operation, and the operator's operation load can be remarkably reduced. It is an object of the present invention to provide a method and apparatus for producing a long dimension.

[0005]

According to the arc length dimension creating method of the present invention, in writing the arc length dimension on the drawing data in the CAD system, a selection step for selecting the entry of the arc length dimension and a dimension line are selected. Based on the instruction step for instructing the position of the measurement point on the arc to be entered and the position of the dimension line on the drawing, and based on the position of the measurement point on the arc instructed by the instructing step, the auxiliary dimension line is measured. An automatic determination step for determining whether to draw out radially centered on the center or perpendicular to the chord of the arc to be measured and parallel to each other, and an instruction by the instruction step on the displayed and stored drawing data and And a writing step for writing the data of the arc length dimension line based on the discrimination result by the automatic discrimination step.

The arc length dimension creating apparatus according to the present invention is a CA
In the arc length dimension creating device for writing the arc length dimension on the drawing in the D system, the command input means for inputting a command including the arc length dimension writing command, the measurement point on the arc to which the dimension line is to be written, and Based on the indicating means for indicating the position of the dimension line on the drawing and the position of the measuring point on the arc indicated by the indicating means, the dimension auxiliary line is drawn out radially around the center of the arc to be measured. Or the automatic discrimination means for deciding whether to draw out perpendicularly to the chord of the arc to be measured and parallel to each other, and the indication by the indication means and the discrimination result by the automatic discrimination means on the displayed and stored drawing data. Writing means for writing the data of the arc length dimension line based on the above.

[0007]

In the method and apparatus for creating the arc length dimension of the present invention, when the arc length dimension is entered on the drawing data in the CAD system, the entry of the arc length dimension is selected, and the dimension line is to be entered on the arc. Instruct the position of the measurement point and the dimension line on the drawing, and based on the position of the measurement point on the indicated arc, draw the dimension extension line radially around the center of the arc to be measured or It is decided whether to draw it perpendicularly to the strings and parallel to each other, and the auxiliary dimension line is drawn in an appropriate form on the displayed and stored drawing data based on the instruction and the decision, and the data of the arc length dimension line is drawn. By writing, the arc length dimension can be written easily and easily in a proper form.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a schematic configuration of a CAD system incorporating an arc length dimension creating apparatus according to an embodiment of the present invention. In the CAD system according to the present embodiment, when the arc length dimension is entered on the drawing data, the measurement points on the arc where the dimension line should be entered and the position of the dimension line on the drawing are designated and displayed and stored. Based on the above instruction, draw auxiliary dimension lines radially around the center of the arc to be measured or perpendicularly to the chords of the arc to be measured and parallel to each other on the drawing data, and obtain the data of the arc long dimension line. You can write.

The CAD system shown in FIG. 1 includes a CAD processing unit 1, an input device 2, a display 3, an output device 4 and a storage device 5. The CAD processing unit 1 is a CPU
A central processing unit (not shown) is included, and CAD processing including arc length dimension creation processing is executed. Input device 2
Includes an operation input device such as a keyboard and a pointing device such as a mouse, and inputs operation input information by an operator and other external information necessary for CAD processing to the CAD processing unit 1. The display 3 is a CAD processing unit 1.
Necessary information such as processed image information according to the above, information related to input by the input device 2, and the like are displayed. The output device 4 includes a plotter, a printer, or the like, and outputs the image information processed by the CAD processing unit 1 as a hard copy. Storage device 5
Is a disk device such as a hard disk device or the like, and operates in association with the CAD processing unit 1 to store data such as image information before, after, and during processing as necessary.

In this case, the CAD processing unit 1 uses the normal CA.
In addition to the configuration for executing the D process, the display control unit 1 for executing the arc length dimension creating process according to the embodiment of the present invention.
1, a command input unit 12, a mode designating unit 13, a measurement point designating unit 14, a dimension line position designating unit 15, a memory 16, a writing control unit 17 and an automatic discriminating unit 18.

The display controller 11 controls the display on the display 3. Under the control of the display control unit 11, drawing data and the like are displayed on the screen of the display 3. The command input unit 12 performs a process for allowing the operator to input a command including a circular arc length dimension writing command by an interactive operation with the screen of the display 3, for example. For this reason, the command input unit 12 may use the display control unit 1 as necessary.
Control 1 The mode instructing unit 13 allows the operator to select the arc length dimension writing mode when the operator inputs a command for writing the arc length dimension by an interactive operation with the screen of the display 3 by the command input unit 12, for example. Process. That is, this mode instruction unit 1
In 3, there are a "center mode" in which the dimension extension lines are drawn out radially around the center of the arc to be measured, and a "parallel mode" in which the dimension extension lines are drawn perpendicular to the chords of the arc to be measured and parallel to each other. Either one of them is instructed. Therefore, the mode instructing unit 13 has the command input unit 1
2, and controls the display control unit 11 as necessary.

The measurement point designating section 14 functions at least when the command for entering the arc length dimension is input by the command input section 12, and for example, by interacting with the screen of the display 3, the arc length dimension on the drawing. A process for causing the operator to indicate a measurement point on an arc where a line should be written is performed. Therefore, the measurement point instruction unit 14 also controls the display control unit 11 as necessary.

The dimension line position designating section 15 functions in a state where the display control section 11 displays a drawing on the screen of the display 3 and the measurement point designating section 14 designates a measurement point on an arc, For example, a process for causing an operator to instruct a position to write a dimension line on the drawing by an interactive operation with the screen of the display 3 is performed. Therefore, the dimension line position designating unit 15 also controls the display control unit 11 as necessary.

The memory 16 stores information including CAD drawing data to be displayed by the display control unit 11. The stored contents of the memory 16 are transferred to the storage device 5 as needed. The memory 16 may share the memory used in the normal CAD processing in the CAD processing unit 1.

The writing control unit 17 is arranged on the drawing data displayed on the display 3 and stored in the memory 16 to measure the position of the measurement point on the arc obtained by the measurement point designating unit 14 and the dimension line position designating unit 15. The arc length dimension line data is written in the "center mode" or "parallel mode" in accordance with the mode designated by the mode designating unit 13 or the automatic discriminating unit 18 described later according to the entry position of the dimension line obtained by.

The automatic discriminating section 18 operates only when the "parallel mode" is instructed by the mode instructing section 13,
The measurement range of the two measurement points designated by the measurement point designating section 14 is a predetermined angle, for example, 1 at the center angle of the arc to be measured.
When the angle is less than 80 °, nothing is done, but when the central angle of the arc to be measured is 180 ° or more, the writing controller 17 is controlled to forcibly change to the “center mode”. In this case, the reason why the determination angle of the automatic determination is 180 ° is that it is impossible to write an appropriate dimension line in the “parallel mode” at 180 ° or more. This angle is 180 degrees, if desired.
It may be set to an appropriate angle less than °. The measurement range is determined by predetermining the designation order of the two measurement points, for example, counterclockwise.

Next, the operation of the CAD system having such a structure, particularly for creating the arc length dimension, will be described in detail with reference to the flowchart shown in FIG. It is assumed that the processing shown in FIG. 2 is started as an interrupt processing by a command input during a normal drawing or editing operation in the CAD system.

First, the command input section 1 of the CAD processing section 1
When the operator selects the arc length dimension creation command via 2 (step S1) and the operator instructs the dimension entry mode of "center mode" or "parallel mode" via the mode instruction section 13 (step S1). S2), the system is set to the arc length dimension mode of the designated dimensioning mode (step S3). When the arc length dimension mode is entered, the measurement point designating section 14 of the CAD processing unit 1 instructs the operator on the measurement point on the arc where the arc length dimension on the drawing should be entered (step S4). The instruction of the measurement points on the circular arc by the measurement point instruction unit 14 is performed by the operator's input request via the screen of the display 3, and the operator accordingly performs an instruction operation using the cursor on the screen. .. In this case, the instruction of the measurement points by the operator is performed in a predetermined order, for example, a counterclockwise order in order to clarify the measurement range. That is, as described above, the first measurement point is designated and then the second measurement point is designated counterclockwise. In other words, the measurement from the first measurement point to the second measurement point is performed counterclockwise.

In step S4, when the measurement point is designated,
The automatic determination unit 18 first determines whether or not it is the "central mode" (step S5), and when it is not the "central mode",
That is, in the case of the “parallel mode”, it is further determined whether or not the measurement range at the designated measurement point is 180 ° or more (step S6). If the measurement range is 180 ° or more, the write control is performed. After controlling the unit 17 to forcibly change the dimension mode from the "parallel mode" to the "center mode" (step S7), the process proceeds to step S8. If it is determined in step S5 that the mode is the "center mode", and if it is determined in step S6 that the measurement range is less than 180 °, the process immediately proceeds to step S8.

In step S8, the operator designates the dimension line position where the arc length dimension line on the drawing should be written. The dimension line position instructing section 15 is instructed by the operator through the screen of the display 3, and the operator performs an instruction operation using the cursor on the screen in response to the input.

The writing controller 17 displays the arc length dimension line data on the measurement point designated in step S4 according to the dimension line position obtained in step S5, displayed on the screen of the display 3 and stored in the memory 16. Instructed in step S2 on the drawing data, or step S7
Writing is performed in the dimension entry mode changed and set in step S9, and the system shifts to the next process.

Here, an example of a specific operation in this system will be described in detail. First, C as shown in FIG.
In the menu on the editing screen of the AD system, "Annotation"-
If you select "Execute" (annotation means to enter annotations other than drawing such as dimension lines), the menu as shown in Fig. 4 will be displayed. In this menu, select "Dimension"-"Element" 5) is displayed, a menu as shown in Fig. 5 is displayed, and the prompt line at the bottom of the display 3, for example, "Please specify the type of dimension line" is displayed. This requires the operator to instruct the type of dimension line to be filled.

In this menu, the toggle switch parameter “center” toggle on the menu is turned on, for example (“□” before “center” is “■” as shown in FIG. 5).
When "Arc length"-"Execution" (meaning execution of an arc length dimension) is selected, the arc length dimension creation mode is entered and a menu as shown in FIG. 6 is displayed. In this menu, in the normal case, "automatic recognition"-"execution" has already been preferentially selected at the time of display. The selection of these menus and the change thereof can be performed by the operator while looking at the editing screen of the display 3
This is done by operating the cursor movement keys or the mouse to move the cursor bar on the menu.

In this state, as shown in FIG. 6, a message "Please indicate the starting point on the circumference" is displayed on the prompt line, so that the operator can enter the arc length dimension on the arc. An instruction for the first measurement point is required. When you operate the mouse etc. to indicate the first point, the prompt line on the screen will display "Please indicate the next point on the circle" as shown in Fig. 7. The operator is required to instruct the second measurement point on the drawing in which the dimension line should be entered. The second measurement point is instructed by setting the measurement range counterclockwise as described above.

When the second point is designated by operating the mouse or the like, next, as shown in FIG. 8, the prompt line on the screen displays "Please indicate the position of the dimension line". This requires the operator to instruct the position of the dimension line. When the position of the dimension line is specified with the cursor etc. by operating the mouse etc., in this case the "center" shown in FIG.
Since the toggle is turned on, as shown in FIG. 9, the "center mode" is set at the set position on the drawing, that is, the auxiliary dimension line is drawn out radially around the center of the arc to be measured, and the arc length is extended. The dimensions are written.

If the dimension line mode is set,
As shown in FIG. 5, the “center” toggle is not turned on, and the “center” toggle is turned off as shown in FIG. 10 (as shown in FIG. 10, “□” is placed before “center” instead of “■”). Is displayed), "arc length"-"execute" is selected, and the arc length dimension creation mode is set in the "parallel mode". In this case, when the measurement point and the position of the dimension line are designated in the same manner as described above, since the "parallel mode" is set, the auxiliary dimension line is measured at the set position on the drawing as shown in FIG. The arc length dimension is written in such a manner that it is drawn out perpendicularly to the chords of and parallel to each other.

Further, the mode automatic discrimination in the "parallel mode" will be specifically described. When designating the measurement point, after designating the first measurement point and then designating the second point, the second point such that the measurement range is less than 180 ° as shown in FIGS. 12 and 13. When the eyes are instructed and the position of the dimension line is instructed, the automatic discriminating unit 18 (step S6) determines it, and the writing control unit 17 (step S9) determines the arc length in the "parallel mode" as shown in FIG. The dimension line is written.

In designating the measurement point, when the second measurement point is designated after designating the first measurement point,
As shown in FIG. 5 and FIG. 16, when the second point is designated so that the measuring range is 180 ° or more and the position of the dimension line is designated, the automatic discriminating unit 18 (step S6) discriminates it and the entry mode is changed. The "center mode" is forcibly changed, and the writing control unit 17 (step S9) writes the arc length dimension line in the "center mode" as shown in FIG. In this case, in order to clarify the boundary of automatic discrimination, an auxiliary line of 180 ° may be displayed as shown in FIGS. 12 and 15.

As described above, the arc length dimension line at any position on the arc can be written very easily at any position in any form. The "center mode" in which the dimension extension lines are drawn out radially around the center of the arc to be measured
And the "parallel mode" in which the dimension extension line is drawn out perpendicularly to the chord of the arc to be measured and parallel to each other, the arc length dimension line can be written, and in the "parallel mode" , The measurement range is automatically determined from the designated measurement point, and the measurement range is set to a predetermined angle, for example, 18
When the angle exceeds 0 °, the "center mode" is forcibly changed and an appropriate arc length dimension line is written, so that it is possible to flexibly deal with the situation of various drawings.

In the above description, the "center mode" and the "parallel mode" can be individually set, and the automatic determination is performed only when the "parallel mode" is selected. However, the above-mentioned "parallel mode" only system may be always set to the "center mode" only when the measurement range exceeds a predetermined angle.

In addition, the mode in which the automatic discrimination is performed in the above-mentioned "parallel mode" is independently set as the "automatic mode", and three modes are individually designated together with the "parallel mode" and the "center mode" in which the automatic discrimination is not performed. You can
In this case, instead of the menus shown in FIGS. 5 and 10, for example, as shown in FIG. 18, “automatic” indicating “automatic mode”, “parallel mode” and “center mode”, respectively,
The desired mode is selected by displaying three toggle switches, "parallel" and "center", and selectively turning these "auto", "parallel" and "center" toggles on and off.

[0032]

As described above, according to the present invention, C
When entering the arc length dimension on the drawing data in the AD system, select the entry of the arc length dimension, and instruct the measurement point on the arc where the dimension line should be entered and the position of the dimension line on the drawing. Based on the position of the measuring point on the arc
It is determined whether to draw the dimension extension line radially around the center of the arc to be measured or to draw it perpendicularly to the chord of the arc to be measured and parallel to each other, and on the drawing data that is displayed and stored, Based on the above instruction and determination, the auxiliary dimension line is drawn out in an appropriate form so that the data of the arc length dimension line can be written, and the arc length dimension can be written easily and in an appropriate form by a simple operation. It is possible to provide a method and a device for creating an arc length dimension that can remarkably reduce the operation load.

[Brief description of drawings]

FIG. 1 is a block diagram showing a schematic configuration of a CAD system incorporating an arc length dimension creating apparatus according to an embodiment of the present invention.

FIG. 2 is a flowchart for explaining a schematic operation of the CAD system of FIG.

FIG. 3 is a diagram schematically showing a state of a display screen for explaining a schematic operation of the CAD system of FIG.

FIG. 4 is a diagram schematically showing a state of a display screen for explaining a schematic operation of the CAD system of FIG.

5 is a diagram schematically showing a state of a display screen for explaining a schematic operation of the CAD system of FIG.

FIG. 6 is a diagram schematically showing a state of a display screen for explaining a schematic operation of the CAD system of FIG.

7 is a diagram schematically showing a state of a display screen for explaining a schematic operation of the CAD system in FIG.

8 is a diagram schematically showing a state of a display screen for explaining a schematic operation of the CAD system in FIG.

9 is a diagram schematically showing a state of a display screen for explaining a schematic operation of the CAD system in FIG.

10 is a diagram schematically showing a state of a display screen for explaining a schematic operation of the CAD system in FIG.

11 is a diagram schematically showing a state of a display screen for explaining a schematic operation of the CAD system in FIG.

12 is a diagram schematically showing a state of a display screen for explaining a schematic operation of the CAD system in FIG.

13 is a diagram schematically showing a state of a display screen for explaining a schematic operation of the CAD system of FIG.

FIG. 14 is a diagram schematically showing a state of a display screen for explaining a schematic operation of the CAD system of FIG.

15 is a diagram schematically showing a state of a display screen for explaining a schematic operation of the CAD system in FIG.

16 is a diagram schematically showing a state of a display screen for explaining a schematic operation of the CAD system of FIG.

17 is a diagram schematically showing a state of a display screen for explaining a schematic operation of the CAD system in FIG. 1. FIG.

FIG. 18 is a diagram schematically showing a state of a display screen for explaining an example of a schematic operation of a CAD system of another embodiment of the present invention.

[Explanation of symbols]

1 ... CAD processing unit, 2 ... Input device, 3 ... Display,
4 ... Output device, 5 ... Storage device, 11 ... Display control unit, 12
... Command input section, 13 ... Mode instruction section, 14 ... Measuring point instruction section, 15 ... Dimension line position instruction section, 16 ... Memory, 17
... writing control unit, 18 ... automatic discriminating unit.

Claims (4)

[Claims] 1. When entering an arc length dimension on drawing data in a CAD system, a selection step for selecting the entry of the arc length dimension, and a measurement point on the arc to which the dimension line is to be entered and a dimension line on the drawing Instructing step to indicate the position, based on the position of the measurement point on the arc indicated by the instructing step, the auxiliary dimension line is drawn radially around the center of the arc to be measured or to the chord of the arc to be measured. On the other hand, an automatic discriminating step for deciding whether to draw out vertically and parallel to each other, and data of the arc length dimension line on the basis of the instruction by the instructing step and the discrimination result by the automatic discriminating step on the displayed and stored drawing data. And a writing step for writing. 2. The automatic discriminating step, when the angle between the measurement points on the arc where the dimension line is to be entered exceeds 180 °,
In the step of determining that the dimension extension line is to be drawn radially around the center of the arc to be measured, and if not, to draw the dimension extension line perpendicular to the chord of the arc to be measured and parallel to each other. The arc length dimension creating method according to claim 1, wherein there is. 3. An arc length dimension creating apparatus for inputting arc length dimensions on a drawing in a CAD system, a command input means for inputting a command including a command for writing arc length dimensions, and an arc to which a dimension line is to be entered. Instructing means for instructing the position of the upper measuring point and the dimension line on the drawing, and based on the position of the measuring point on the arc indicated by the instructing means, the dimension auxiliary line is set to the center of the arc to be measured. An automatic discriminating means for deciding whether to pull out radially as a center or perpendicularly to the chord of the arc to be measured and parallel to each other, and an instruction and an automatic discrimination by the instructing means on the displayed and stored drawing data. An arc length dimension creating device, comprising: writing means for writing data of arc length dimension lines based on a determination result by the means. 4. The automatic discriminating means, when the angle between the measurement points on the arc to which the dimension line is to be written exceeds 180 °, draws the dimension auxiliary line radially around the center of the arc to be measured. If not, it is means for discriminating that the auxiliary dimension line is drawn out perpendicularly to the chord of the arc to be measured and parallel to each other.
Arc length dimension creating device described in.