WO2007037032A1

WO2007037032A1 - Outline measuring machine, method for calculating geometrical basic profile of outline measuring machine and its program

Info

Publication number: WO2007037032A1
Application number: PCT/JP2006/309120
Authority: WO
Inventors: Akito Watanabe; Osamu Kanehara
Original assignee: Tokyo Seimitsu Co., Ltd.
Priority date: 2005-09-27
Filing date: 2006-04-25
Publication date: 2007-04-05

Abstract

An outline measuring machine which can designate calculation of geometrical basic profile by simple operation without causing operational error. The outline measuring machine comprises a measuring section (1) for measuring the outline of an article to be measured, a display (11) for displaying the measured outline of the article, and a data processing/control section (2) for processing data concerning the outline of the article measured at the measuring section and controlling each section. The data processing/controlling section (2) has a frame display function (5) for displaying a frame at a designated position of the display, a geometrical basic profile determining function (3) for calculating an adaptable geometrical basic profile from the outline in the frame, and functions (6, 8) for displaying the geometrical basic profile thus calculated.

Description

Technical field of contour shape measuring machine, method for calculating basic geometric shape of contour shape measuring machine, and program therefor

The present invention relates to a contour shape measuring instrument such as a two-dimensional and three-dimensional shape measuring machine and a two-dimensional and three-dimensional surface roughness measuring machine, and more particularly to a contour shape of a measured object measured by the contour shape measuring machine. The present invention relates to a process of calculating a basic geometric shape document that is displayed on a spray and conforms to the displayed contour shape. Background art

Contour shape measuring machines such as 2D and 3D shape measuring machines and 2D and 3D surface roughness measuring machines display the contour shape of non-measured objects (workpieces) measured on the display based on the measurement data. FIG. 1 is a diagram showing an example of the contour shape displayed on the screen 21 of the display. Usually, a workpiece measured by a contour shape measuring machine is machined based on design data, and has a shape combining geometric basic shapes corresponding to the design data. For example, in the example of Fig. 1, the displayed contour shape 2 2 is composed of a semi-circular and straight geometric basic shape. Geometric basic shapes are points, straight lines, partial circles, circles, ellipses, and so on.

The contour shape measuring machine has a function to calculate a geometric basic shape that conforms to the measured contour shape. This makes it easy to recognize the difference between the contour shape of the workpiece and the design data. When calculating the geometric basic shape, for example, after designating the type of the geometric basic shape, click the two points A and B on the contour shape with the mouse as shown in Fig. 1, and the calculation range And click the shape recognition execution mark (not shown). To this operation Correspondingly, the data processing / control unit of the contour shape measuring machine performs processing for calculating the geometric basic shape that conforms to the contour shape in the specified range, and displays the calculated geometric basic shape.

When calculating the geometric basic shape, it is desirable that the two points in the calculation range are points close to both ends of the geometric basic shape, for example, points C and D. This allows more accurate calculation of the geometric basic shape that fits the wider calculation range, and enables recognition of the difference between the contour shape and the design data within the widest possible range of the geometric basic shape. Because. However, if the point E is mistakenly specified, for example, the contour shape includes a semicircle and a straight line portion, so that a suitable geometric basic shape cannot be calculated or an incorrect geometric basic shape may be calculated. '

Note that a conventional example of a contour shape measuring method and apparatus is disclosed in Japanese Patent Laid-Open No. 8-43078 of Japanese Patent Publication. Disclosure of the invention

In order to calculate the geometric basic shape that conforms to the contour shape, it is necessary to select the type of geometric basic shape, specify the calculation range (two point instructions), and execute instructions. Both require 3 operations (4 click operation). In some cases, the calculation range search direction is specified. For this reason, when calculating a geometric basic shape with a contour shape that is a combination of a large number of geometric basic shapes, or when displaying the contour shape of a large number of parts on the display and calculating the respective geometric basic shapes. However, it is necessary to repeat the above operation many times, which is complicated.

In addition, since the calculation range is instructed by the operator, there is an error for each operation, and in particular, there is an error due to individual differences among operators. If there is an error, an error will occur in the calculation result of the shape, and calculation is impossible. It may also occur. Therefore, it is necessary to specify the calculation range precisely, and there is a problem that the operation is complicated.

An object of the present invention is to solve such problems, and it is an object of the present invention to provide an instruction for calculating a geometric basic shape in a contour shape measuring machine with a simple operation and to prevent an operation error.

In order to achieve the above object, the contour shape measuring machine, the geometric basic shape calculation method of the contour shape measuring machine, and the program therefor include a frame for indicating a calculation range for calculating the basic geometric shape on the display. Display

Place this frame. As a result, the calculation range can be specified in one click.

Furthermore, the type of geometric basic shape is calculated from the contour shape within the calculation range indicated by the frame. This eliminates the need to select the geometric basic shape type.

Furthermore, the extent to which the calculated geometric basic shape can be expanded in the contour shape outside the frame is examined, and an enlarged range that matches the calculated geometric basic shape is calculated. This makes it possible to calculate the basic geometric shape within the maximum range without having to specify the calculation range precisely. If the geometric basic shape that fits within the expanded calculation range is calculated again, the calculation accuracy of the geometric basic shape can be improved.

Furthermore, when a suitable geometrical basic shape cannot be calculated, this fact is displayed to inform the operator evening.

According to the present invention, in the contour shape measuring machine, an instruction to calculate the geometric basic shape can be performed with a simple operation, and an operation error does not occur.

Brief Description of Drawings

FIG. 1 is a diagram showing a display example of a conventional contour shape. FIG. 2 is a block diagram of the contour shape measuring machine according to the embodiment of the present invention.

FIG. 3A to FIG. 3D are diagrams for explaining processing for the contour shape displayed on the display of the present invention.

FIG. 4A to FIG. 4H are diagrams showing examples of changing the display of the power single frame when the condition of the contour shape to be displayed is changed.

FIG. 5A to FIG. 5D are diagrams for explaining operations on the cursor frame.

FIG. 6 is a flowchart showing the processing of the contour shape measuring machine according to the embodiment of the present invention. BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 2 is an overall functional block diagram of the contour shape measuring machine according to the embodiment of the present invention.

Reference number 1 indicates contour shape measuring machines such as 2D and 3D shape measuring machines and 2D and 3D surface roughness measuring machines. The contour shape measuring machine 1 sends detection data obtained by digitally converting the detection signal to the data processing / control unit 2. The data processing / control unit 2 is composed of a computer or the like, and responds to an instruction from an operator using the mass 12 or keyboard 13 or an instruction sent from the host computer via the communication path 15. Storage device 14 Calls a program stored in 4 and performs various types of processing. The data processing / control unit 2 performs various processing on the received detection data to generate processing results, and displays the detection data and processing results on the display 11 1 or stores them in the storage device 14. Or sent to the host computer via communication path 15. Data processing · The control unit 2 has various processing functions that are used in conventional equipment. However, those explanations are omitted here, and only the parts related to the present invention will be explained.

The data processing / control unit 2 calculates a geometric basic shape calculation unit 3 that calculates whether a contour shape based on detection data in a predetermined range matches a geometrical shape such as a point, straight line, semicircle, circle, or ellipse. Display range 4 for calculating the range of the contour shape that matches the selected geometric basic shape, frame setting unit 5 for setting the frame (cursor frame) to be displayed on the display 1 1, and display for the display 1 1 And a display control unit 6 for controlling the display. The display position and frame size of the cursor frame displayed by the frame setting section 5 are the instructions from the operator using the mass 1 2 and keyboard 1 3, the reading of data from the storage device 1 4, and the communication path 1 5 is set according to the instruction sent from Host 卜 Computer via.

The display control unit 6 includes a contour shape display unit 7 that controls the display of the contour shape according to the detection data, a geometric basic shape display unit 8 that controls the display of the geometric basic shape, and the geometric basic shape cannot be calculated. It has an incomputable display unit 9 that controls the display of certain things, and a frame display unit 10 that controls the display of the cursor frame set by the frame setting unit 5.

First, what kind of processing the contour shape measuring machine of this embodiment performs will be described with reference to FIGS. 3A to 3D. FIG. 3A shows an image displayed on the screen 2 1 of the display 1 1, and shows an example in which the same contour shape as the conventional image in FIG. 1 is displayed. As shown in FIG. 3A, in this embodiment, a force-sol frame 23 is displayed. The display position of the cursor frame 2 3 is moved by the mouse or the like, and the size of the force frame 2 3 is changed.

When calculating the geometric basic shape that fits the semicircular part of the contour 2 2 displayed on the screen 2 1, as shown in Fig. 3B, the force frame 2 3 is changed to the semicircular part. Moving. Accordingly, the basic geometry Shape calculation unit 3 force Calculates which of the multiple geometric basic shapes the contour shape in the cursor frame 2 3 fits. For example, if it is part of a circle, the center and radius of the circle are calculated. The basic geometric shape is a point, straight line, semicircle, circle, ellipse force S, and other shapes can be added. The matching range calculation unit 4 calculates a range of the contour shape 2 2 that matches the calculated geometric basic shape. In the example of Fig. 3B, the semi-circular edges 2 6 and 2 7 are in the range that fits the basic geometric shape. Then, the geometric basic shape calculation unit 3 calculates a conforming geometric basic shape for the suitable range again. This improves the calculation accuracy of the geometric basic shape. The geometric basic shape display unit 8 of the display control unit 6 displays the calculated geometric basic shape on the screen using auxiliary lines. At this time, for example, if the semicircle portion is displayed with a thick solid auxiliary line and the remaining semicircle with no outline shape is displayed with an auxiliary line such as a broken line, the operation evening can be easily recognized. In addition, the end of the range in which the basic geometric shape is applicable is clearly indicated.

Similarly, when calculating the geometric basic shape that matches the right straight line portion of the contour shape 2 2, the cursor frame 2 3 is moved to the right straight line portion as shown in FIG. 3C. In accordance with this, the conforming geometric basic shape and the conforming range are calculated and displayed as shown in the figure. 'Of course, when the conforming geometric basic shape and the conforming range are displayed, it is desirable to display the name and numerical value at the same time.

As shown in Fig. 3D, when the cursor frame 2 3 is moved to a position that includes a semicircle and a straight line and automatic determination is instructed, there is no suitable geometric basic shape. It is judged as impossible, and it is displayed that the calculation is impossible by changing the color of the cursor frame 23. Next, the display of the cursor frame 2 3 when the display of the contour shape is changed will be described with reference to FIGS. 4A to 4H.

The magnification and position of the contour shape displayed on the display may change. The display of the cursor frame 2 3 may or may not be changed according to such a change. Figures 4A to 4D memorize the relative positional relationship between the displayed contour shape and the force frame 2 3

Figure 4A shows the state before the magnification and position of the contour shape are changed. This is a case where the display of the cursor frame 23 is changed according to the change of the contour shape display. Fig. 4B shows the case where the horizontal magnification of the contour shape is changed to be reduced, and the horizontal size of the force one-sol frame 2 3 is also changed in accordance with this change. Fig. 4C shows the case where the vertical and horizontal magnification of the contour shape is enlarged, and the size of both the vertical and horizontal directions is also changed in accordance with this change. Fig. 4D shows the case where the display position of the contour shape is changed in the horizontal direction, and the cursor frame 2 3 is also moved in the horizontal direction in accordance with this change.

Figures 4E to 4H show the case where the display position of the cursor frame 23 on the screen is not changed even if the magnification or position of the displayed contour shape is changed.

There are various other methods for displaying the cursor frame 2 3 when the magnification or position of the displayed contour shape is changed. For example, if the magnification or position of the displayed contour shape is changed, the cursor frame 2 3 is redisplayed at the previous size in the center of the screen, or redisplayed at the position indicated by the mouse. Is the method.

Next, operations for the cursor frame 2 3 will be described with reference to FIGS. 5A to 5D.

Fig. 5A shows an example of the outline shape and cursor frame 23 displayed on the screen. As shown in Figure 5B, double-click the center of cursor frame 2 3 Click to instruct the start of the basic geometric shape calculation process. To change the size of the cursor frame 2 3, drag the four corners 3 2 and the center of the 4 sides of the force frame 2 3 as shown in Fig. 5C. When moving the cursor frame 2 3, drag one of the sides of the cursor frame 2 3 (excluding the center of the side) as shown in Figure 5D. Fig. 6 is a flow chart showing the processing to calculate and display the geometric basic shape and matching range that match the contour shape in the cursor frame. is there.

In step 1001, the contour shape data in the cursor frame is extracted. In step 1 0 1, it is determined whether or not the contour shape data matches the point. If it matches the point, the process proceeds to step 10 07. If it does not match the point, the process proceeds to step 1 0 3. In step 103, it is determined whether or not the contour shape data fits a straight line. If the contour shape data fits the straight line, the process proceeds to step 1007, and if it does not fit the straight line, the process proceeds to step 1004. In step 10 4, it is determined whether or not the contour shape data matches the partial circle. If it matches the partial circle, the process proceeds to step 10 7, and if it does not match the partial circle, the process proceeds to step 1 0 5. In step 1 0 5, it is determined whether or not the contour shape data conforms to a circle. If it conforms to a circle, the process proceeds to step 1 0 7. If it does not conform to a circle, the process proceeds to step 1 0 6. In step 1 0 6, it is determined whether or not the contour shape data fits an ellipse. If it fits an ellipse, the process proceeds to step 1 0 7. If it does not fit the ellipse, the process proceeds to step 1 1 1. When proceeding to Step 1 1 1, the contour shape data does not fit any geometric basic shape and cannot be calculated. In step 1 1 1, display data is displayed to indicate that the calculation is impossible, and the process proceeds to step 1 1 2 to display that the calculation is impossible. Whether the contour shape data conforms to each geometric basic shape can be performed by conventionally known image processing, and detailed description thereof is omitted here. In Step 107, the geometric basic shape calculated as described above is stored as a temporary determination result.

In step 10 8, the calculated geometric basic shape is expanded to the part outside the cursor frame, and the range in which the contour shape data fits is obtained. Specifically, the difference between the geometric basic shape expanded to the part outside the cursor frame and the contour shape data is calculated, and if the difference is less than a predetermined value, it is determined that it is suitable, and the maximum range is obtained.

In step 1 0 9, steps 1 0 2 to 1 0 6 are performed again for the contour shape data within the maximum range calculated as described above, and a geometric basic shape suitable for the maximum range is calculated.

In step 110, it is determined whether or not the geometric basic shape calculated in step 109 matches the geometric basic shape stored as a temporary determination result. If they match, go to step 1 1 2 to display the calculated geometric basic shape. If they do not match, return to step 1 0 8 and repeat the process of expanding the conforming range. If the results do not match even after several attempts, the geometric basic shape stored as the temporary determination result is displayed. The present invention is applicable to any contour shape measuring machine.

Claims

1. a measuring unit that measures the contour of the object to be measured;

A display for displaying the contour shape of the object measured by the measuring unit;

A contour shape measuring machine comprising: a data processing / control unit that processes data related to the contour shape of the measurement object measured by the measurement unit and controls each unit;

The data processing / control unit is

A frame display function and a frame for displaying a frame at the specified position range of the display.

A geometric basic shape determination function for calculating a geometric basic shape that fits from the contour shape in the frame displayed on the display;

A contour shape measuring machine comprising a geometric basic shape display function for displaying a calculated geometric basic shape.

2. The contour shape measuring instrument according to claim 1, wherein the basic geometric shape is a point, a straight line, a partial circle, a circle, or an ellipse.

3. The data processing / control unit

The contour shape measuring machine according to claim 1, further comprising a fitting range calculation function for calculating a range that matches the calculated geometric basic shape in a portion outside the frame of the contour shape displayed on the display.

4. The contour shape measuring machine according to claim 3, wherein the basic geometric shape display function displays the enlarged matching range on the display.

5. The contour shape measuring machine according to claim 1, wherein the geometric basic shape display function displays an indeterminate determination when a geometric basic shape to which the geometric basic shape determination function can not be calculated is displayed.

6. With the contour shape measuring machine, display the measured contour shape of the measured object. A geometric basic shape calculation method for a contour shape measuring machine that calculates a geometric basic shape that matches a contour shape of a displayed object to be measured, and displays a frame at an indicated position on the display,

Calculate a geometric basic shape that fits from the contour shape in the frame displayed on the display,

A method for determining a geometric basic shape of a contour shape measuring machine, wherein the calculated geometric basic shape is displayed.

7. The method according to claim 6, wherein the geometric basic shape is a point, a straight line, a partial circle, a circle, or an ellipse.

8. The method according to claim 6, wherein a range that matches the calculated geometric basic shape is further calculated in a portion outside the frame of the contour shape displayed on the display.

9. The method of claim 8, further displaying the expanded fit range on the display.

10. The method according to claim 6, wherein when the geometric basic shape determining function cannot be calculated, the calculation impossible is displayed.

1 1. On the computer attached to the contour measuring machine,

The measured contour shape of the measured object is displayed on the display, the geometric basic shape that matches the displayed contour shape of the measured object is calculated, a frame is displayed at the indicated position on the display,

A geometric basic shape that fits from the contour shape in the frame displayed on the display;

A program characterized by displaying a calculated geometric basic shape