JP2023167689A - Inspecting device, inspecting method and program - Google Patents

Abstract

To provide an inspecting device that can easily and surely compare a dimension on a design drawing with an actual measured value.SOLUTION: An inspecting device according to an aspect of the present invention is an inspecting device for inspecting a dimension of a measured object, and includes: design information obtaining means for capturing a contour line of the measured object, a designed dimension value, and a design drawing including a dimension line which associates the contour line with the designed dimension value, and a dimension auxiliary line; contour image obtaining means for capturing a contour image of the measured object corresponding to the design drawing; superimposing means for superimposing design drawing data obtained by the design information obtaining means and contour data on the measured object obtained by the contour image obtaining means with each other; actual measured data extracting means for extracting actual measured data on the measured object from the contour data; dimension line data extracting means for extracting, using the contour data superimposed by the superimposing means, the dimension line and the dimension auxiliary line from the design drawing data; design data extracting means; comparing means; and evaluating means.SELECTED DRAWING: Figure 1

Description

The present invention relates to an inspection device, an inspection method, and a program.

Generally, a shape inspection device measures the dimensions of each part of an object to be measured using an image sensor or the like. Furthermore, the measured dimensions are compared with the dimensions of the design drawing, etc., in order to evaluate the quality of the object to be measured. When making a comparison, it may be necessary to input the dimensions on the design drawing so that they can be compared with the measured dimensions. In particular, when the design drawings are recorded on paper media, it is necessary to manually input the dimensions on the design drawings that have been visually read. Therefore, it is desired to save labor and shorten the working time of such work.

Patent Document 1 discloses a measurement setting data creation method that includes a design value information extraction means for extracting design value information consisting of design values close to measured dimension values from the design data using design data created from CAD data or the like. The equipment is described. Further, Patent Document 1 describes that dimension measurement of the object to be measured and evaluation in comparison with tolerances are further performed based on the above-mentioned design value information etc. (measurement setting data) associated with the measurement target location. There is.

Japanese Patent Application Publication No. 2012-37257

However, in Patent Document 1, it is assumed that the design data includes in advance position information of shape lines, position information of dimension lines, design values and tolerances associated with the dimension lines, and the like. For this reason, it is difficult to directly extract design value information from a design drawing on a paper medium using the measurement setting data creation device of Patent Document 1. Regarding this point, a method of mechanically reading the design drawings in advance using OCR or the like may be considered. However, in order to extract the design values associated with the dimension lines, it is necessary to identify the outline of the object to be measured and the dimension extension lines described in the design drawing. When the outline line and the dimension extension line of the object to be measured are written with the same line type, it is difficult to distinguish them by the line type, for example. Therefore, it is not easy to mechanically extract design value information from design drawings.

The present invention has been made based on such circumstances, and an object of the present invention is to provide an inspection device that can easily and reliably compare dimensions on a design drawing with actual measurements.

An inspection device according to an aspect of the present invention made to solve the above problems is an inspection device that inspects the dimensions of a workpiece, and includes an outline, a design dimension value, and an outline of the workpiece. a design information acquisition means for importing a design drawing including dimension extension lines that corresponds to the design dimension values; an external image acquisition means for importing an external image of the object to be measured corresponding to the design drawing; a superimposition means for superimposing the acquired design drawing data and the external shape data of the object to be measured acquired by the external image acquisition means; an actual measurement data extraction means for extracting actual measurement data of the object to be measured from the external shape data; , an auxiliary line extracting means for extracting the dimensional extension line from the design drawing data using the external shape data superimposed by the superimposing means, and using the dimensional extension line extracted by the auxiliary line extracting means. , a design data extraction means for extracting design data of the object to be measured from the design drawing data; a comparison means for comparing the actual measurement data and the design data while associating them; and an evaluation means for evaluating.

The inspection device according to one aspect of the present invention can easily and reliably compare dimensions on a design drawing with actual measurements.

FIG. 1 is a block diagram showing the configuration of an inspection device according to an embodiment of the present invention. FIG. 2 is a schematic diagram showing a design drawing read by the inspection device of FIG. FIG. 3 is a schematic diagram showing an external image of the object read by the inspection device of FIG. 1. FIG. 4 is a schematic diagram showing outline data obtained by extracting outline lines from the image shown in FIG. FIG. 5 is a schematic diagram showing dimension extension lines and numerical information extracted from the design drawing data of FIG. 2. FIG. 6 is a schematic diagram showing a state in which the dimension extension lines in FIG. 5 are supplemented. FIG. 7 is a flow diagram showing an inspection method according to an embodiment of the present invention.

[Description of embodiments of the present invention]
First, embodiments of the present invention will be listed and explained.

An inspection device according to one aspect of the present invention is an inspection device that inspects the dimensions of a workpiece, the test device comprising: an outline of the workpiece, a design dimension value, and a dimension that associates the outline line with the design dimension value. a design information acquisition means for importing a design drawing including auxiliary lines; an outline image acquisition means for importing an outline image of the object to be measured corresponding to the design drawing; design drawing data acquired by the design information acquisition means; and the outline a superimposing means for superimposing the external shape data of the object to be measured acquired by the image acquiring means; an actual measurement data extraction means for extracting actual measurement data of the object from the external shape data; an auxiliary line extracting means for extracting the dimension auxiliary line from the design drawing data using the external shape data obtained by the auxiliary line extraction means; The apparatus includes a design data extraction means for extracting, a comparison means for associating and comparing the measured data and the design data, and an evaluation means for evaluating the measured data based on the design data.

The inspection device is equipped with the auxiliary line extraction means for extracting the dimensional extension lines from the design drawing data using the external shape data, so that it can be used even if the design drawings contain both external outline lines and dimensional extension lines. Even if the design data of the object to be measured exists, it is possible to accurately extract the design data of the object to be measured. Therefore, according to the inspection device, when the design drawing is a paper medium, it is possible to significantly reduce the effort required to visually read the design data in order to inspect the dimensions of the object to be measured. Therefore, dimensions on the design drawing can be easily and reliably compared with actual measurements. Note that the term "outline line" herein refers to a line indicating the outer edge of the object to be measured, and a boundary line between parts of different shapes in an internal region surrounded by the outer edge. Examples of "boundary lines between parts with different shapes" include boundaries between parts with different heights, boundaries between recesses or holes, boundaries between flat parts and curved parts or sloped parts, etc. .

It is preferable that the design drawing is data or image data derived from a paper medium. When the design drawing is such data, the effect of the present invention, which can accurately extract the design data of the object to be measured from the design drawing data, is more clearly exhibited. Note that "data derived from paper media" herein refers to figures, lines, numbers, codes, etc. expressed on paper, and includes both handwritten data and printed data on paper. It also includes figures, lines, numbers, codes, etc. on paper that are imported into a computer by scanning the paper. "Image data" is data drawn as an image, and means that each element included in the image, such as figures, lines, numbers, codes, etc., is not identified or structured as data.

It is preferable that the outline image acquisition means extracts the outline of the outline image by edge detection after capturing the outline image, and the outline data includes this outline. In this way, the outline image acquisition means extracts the outline line of the outline image, and the outline data includes this outline line, so that the dimension extension line can be more easily extracted from the design drawing data. .

It is preferable that the superimposing means adjusts the magnification of at least one of the design drawing data and the external shape data. In this manner, the overlapping means can more reliably extract the dimension extension line from the design drawing data by adjusting the magnification of at least one of the design drawing data and the external shape data.

When the external shape data includes the external outline line, the superimposing means identifies the external outline included in the design drawing data using the external outline line included in the external shape data, and the auxiliary line extracting means It is preferable that the above-mentioned outline line is deleted from the above-mentioned design drawing data. In this way, the superimposition means identifies the outline line included in the design drawing data, and the auxiliary line extraction means deletes the outline line from the design drawing data, thereby making it easier to extract the outline from the design drawing data. The above dimension extension line can be extracted.

An inspection method according to another aspect of the present invention is an inspection method for inspecting the dimensions of an object to be measured, in which an outline of the object to be measured, a design dimension value, and a correspondence between the outline line and the design dimension value. a design information acquisition step of importing a design drawing including dimension extension lines to be attached; an outline image acquisition step of importing an outline image of the object to be measured corresponding to the design drawing; and design drawing data acquired in the design information acquisition step; A superimposition step of superimposing the external shape data of the object to be measured obtained in the external image acquisition step, an actual measurement data extraction step of extracting actual measurement data of the object from the external shape data, and an overlapping step of the overlapping step. An auxiliary line extraction step of extracting the dimensional extension lines from the design drawing data using the combined external shape data; A design data extraction step for extracting design data of the object to be measured, a comparison step for associating and comparing the measured data with the design data, and an evaluation step for evaluating the measured data based on the design data. Be prepared.

Since the inspection method includes the auxiliary line extraction step, the effort required to visually read the design data in order to inspect the dimensions of the object to be measured is greatly reduced when the design drawing is a paper medium. be able to. Therefore, dimensions on the design drawing can be easily and reliably compared with actual measurements.

A program according to another aspect of the present invention includes an outline of the object to be measured, a design dimension value, and a dimension extension line that associates the outline line with the design dimension value, in order to inspect the dimensions of the object to be measured. a design information acquisition step of importing a design drawing containing the design drawing, an outline image acquisition step of importing an outline image of the object to be measured corresponding to the design drawing, the design drawing data acquired in the design information acquisition step, and the outline image acquisition step. a superimposition step of superimposing the external shape data of the object to be measured obtained in step 1, an actual measurement data extraction step of extracting actual measurement data of the object from the external shape data, and an overlapping step of the external shape superimposed in the overlapping step. an auxiliary line extraction step of extracting the dimensional extension lines from the design drawing data using data; and a design of the object to be measured from the design drawing data using the dimensional extension lines extracted in the auxiliary line extraction step. The inspection device executes a design data extraction step for extracting data, a comparison step for associating and comparing the measured data with the design data, and an evaluation step for evaluating the measured data based on the design data. .

Since the program executes the auxiliary line extraction process, it can significantly reduce the effort required to visually read the design data to inspect the dimensions of the object when the design drawing is on paper. At the same time, the inspection device can be executed. Therefore, dimensions on the design drawing can be easily and reliably compared with actual measurements.

[Details of embodiments of the present invention]
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings as appropriate.

[Inspection equipment]
The inspection apparatus 100 in FIG. 1 inspects the dimensions of an object to be measured. The inspection device 100 includes an input section 10 that takes in input data, a processing section 20 that processes the input data taken in by the input section 10, and a storage section 30 that stores the input data or data processed by the processing section 20. Equipped with. Further, the inspection device 100 is connected to an external terminal (not shown) for a user to operate from the outside. The inspection apparatus 100 may include a mounting table on which the object to be measured is mounted.

<Input section>
The input unit 10 corresponds to the design drawing, and a design information acquisition means 11 that takes in a design drawing including the outline of the object to be measured, design dimension values, and dimensional extension lines that associate the outline and the design dimension values. A contour image acquisition means 12 is provided for capturing the contour image of the object to be measured.

(Object to be measured)
The object to be measured is, for example, a machined part such as an automobile part. Further, electronic device parts such as BGA, PCB base materials, connector pins, resin molded products, etc. may be used. The present embodiment will be described using a flat plate A having a rectangular shape in plan view as an example of the object to be measured. More specifically, the object to be measured has a circular hole B and an oval hole C. However, the object to be measured of the present invention is not limited to the above-mentioned object.

(Design drawing)
In this embodiment, the design drawings are printed on paper. That is, while the contents described in the design drawings can be read visually by humans, they need to be appropriately converted into data in order to be processed mechanically. As shown in FIG. 2, the design drawing includes the outline of the rectangular flat plate A, the outlines of the circular hole B and the oval hole C in the internal area surrounded by the outline, and Numerical information x1, x2, y1 to y4, z1, and z2 in which design dimension values and tolerances of the outline lines are described, and a plurality of dimension extension lines that associate the above-mentioned outline lines and the above-mentioned numerical information are described. Each of the numerical information has design dimension values and tolerances, and for example, the numerical information x1 is written in a format such as x11±x12. In this case, x11 indicates the design dimension value, and x12 indicates the tolerance. That is, it means that the length of the portion corresponding to the numerical information x1 is allowed to be from x11-x12 to x11+x12. In this embodiment, it is assumed that the numerical information x2, y1 to y4, z1, and z2 are also written in the same format as the numerical information x1 described above. Further, in FIG. 2, the dimension auxiliary line is a line that includes an arrow, a line that connects the tip of the arrow and the outline, or a line that connects the tip of the arrow and the center of the hole. That is, the dimension extension line is a portion of FIG. 2 excluding the outline line and the numerical information. In the above design drawing, the above-mentioned outline line and the above-mentioned dimension extension line are drawn with the same line type and thickness, but in Fig. 2, the above-mentioned outline line is drawn thicker than the above-mentioned dimension extension line for convenience of explanation. There is.

(Design information acquisition means)
The design information acquisition means 11 is realized, for example, by a program that imports design drawings read by a scanner. The scanner may be built into the inspection device 100 or may be placed outside. As the above-mentioned scanner and the above-mentioned program, known ones can be employed.

The design information acquisition means 11 captures the design drawing as design drawing data D1, and then stores the design drawing data D1 in the storage unit 30. The design drawing data D1 is data including, for example, the above-mentioned outline line, the above-mentioned design dimension value, and the above-mentioned dimension extension line derived from the design drawing. As mentioned above, in the above design drawing, the above outline line and the above dimension extension line are described with the same line type and thickness, so in the design drawing data D1, the above outline line and the above dimension extension line are written with the same line type and thickness. It is difficult to identify by

The design information acquisition means 11 identifies at least lines including arrows, lines not including arrows (including both the outline line and the dimension extension line), and the numerical information in the design drawing, and then calculates the design drawing. The drawing data D1 is stored in the storage unit 30. These identifications are performed using, for example, image recognition AI.

(Outline image acquisition means)
The external image acquisition means 12 is, for example, an image sensor that captures an external image of the object to be measured placed on the mounting table of the inspection apparatus 100, which is photographed from a direction corresponding to the design drawing. A known image sensor can be used as this image sensor. As shown in FIG. 3, the external image of the object to be measured includes a rectangular flat plate a, a circular hole b and an oval hole c formed inside the flat plate. The external image may be a black and white image or a color image. In this embodiment, the outline image acquisition means 12 extracts outline lines in the outline image by edge detection after capturing the outline image. As a result, the outline image acquisition means 12 acquires the outline data D2 including the outline line. The acquired external shape data D2 is stored in the storage unit 30. As shown in FIG. 4, the outline data D2 includes the outline of the rectangular flat plate a extracted by edge detection, and the outlines of the circular hole b and the oval hole c. If the external shape data D2 includes data other than the above-mentioned external outline line, for example, data regarding color or color shading, the external image acquisition means 12 may delete these data.

<Processing section>
The processing section 20 includes a superposition means 21, an actual measurement data extraction means 22, an auxiliary line extraction means 23, a design data extraction means 24, a comparison means 25, and an evaluation means 26. The superimposition means 21, the measured data extraction means 22, the auxiliary line extraction means 23, the design data extraction means 24, the comparison means 25, and the evaluation means 26 are each realized by a program built into the inspection apparatus 100, for example.

(Overlapping means)
The superimposition means 21 superimposes the design drawing data D1 acquired by the design information acquisition means 11 and the external shape data D2 of the object to be measured acquired by the external image acquisition means 12. The superimposing means 21 adjusts so that the outline of the design drawing data D1 and the outline of the outline data D2 match most. For example, the adjustment procedure is as follows. First, the maximum numerical value included in the numerical information is extracted from the design drawing data D1, and a line including the above-mentioned arrow corresponding to that numerical value is selected. On the other hand, the longest outline is selected from the outlines of the outline data D2. Then, the size of at least one of the design drawing data D1 and the outline data D2 is adjusted so that the length of the line including the arrow and the outline line match. Thereafter, the position of at least one of the design drawing data D1 and the outline data D2 is adjusted or rotated so that the line not including the arrow in the design drawing data D1 and the outline line of the outline data D2 match most. The coincidence between the line not including the arrow in the design drawing data D1 and the outline line in the outline data D2 is evaluated by a known pattern matching method such as normalized correlation, Hough transform, or feature point detection. As the overlapping means 21 overlays the design drawing data D1 and the external shape data D2 in this manner, the auxiliary line extraction means 23 described later can more easily extract dimension auxiliary lines from the design drawing data D1.

After adjusting the provisional outline of the design drawing data D1 and the outline of the outline data D2, the overlapping means 21 stores the overlaid design drawing data D1 and outline data D2 in the storage unit 30 as overlapping data D3. store. For example, if the superimposition means 21 mistakenly extracts the temporary outline, there is a possibility that the superposition data D3 is stored in a state where the design drawing data D1 and the external shape data D2 are incorrectly superimposed. In consideration of this point, the superposition means 21 may have a function of displaying the superposition data D3 on an external terminal and requesting confirmation from the user. This function allows the user to manually adjust the size, position, etc. of the design drawing data D1 or the external shape data D2 by operating an external terminal.

The overlapping unit 21 specifies the overlapping portion between the design drawing data D1 and the outline data D2 in the overlapping data 30 as an outline line included in the design drawing data D1.

In this embodiment, the superimposition means 21 is configured to provide a reference point, an x-axis direction and a y-axis direction for calculating the coordinates of the outline line, etc. included in each of the design drawing data D1 and the outline data D2 after the above-mentioned adjustment. Determine. The method of determining these reference points, the x-axis direction, and the y-axis direction is not particularly limited. In this embodiment, the reference point of the design drawing data D1 is P1 located at the lower left corner of the flat plate A as shown in FIG. 2, and the reference point of the external shape data D2 is P1 located at the lower left corner of the flat plate A as shown in FIG. This is p1 located at the corner. In addition, in this embodiment, the x-axis direction and y-axis direction of the design drawing data D1 are set to be parallel to two contour lines extending orthogonally from the reference point P1, and the x-axis direction and the y-axis direction of the contour data D2 are The direction is determined to be parallel to two outline lines extending perpendicularly from the reference point p1. In the superposition data 30, the position, x-axis direction, and y-axis direction of the reference point P1 of the design drawing data D1 coincide with the position, x-axis direction, and y-axis direction of the reference point p1 of the external shape data D2, respectively.

(actual data extraction means)
The actual measurement data extraction means 22 extracts actual measurement data D4 of the object to be measured from the external shape data D2. In this embodiment, the measured data extraction means 22 extracts the measured data D4 of the object to be measured based on the outline of the external shape data D2. The measured data extracting means 22 extracts the measured data D4, for example, by the following procedure. At this time, instruction data for extracting the actual measurement data D4 is input to the inspection apparatus 100 prior to extraction of the actual measurement data D4. The above instruction data includes the shape of the extraction target (straight line, circle, ellipse, etc.), the distance between adjacent straight lines, the diameter of the circle, the radius of curvature of the ellipse, the distance between the centers of the circles, information on the range in which the extraction target is detected, etc. can be mentioned. The above-mentioned instruction data may be input manually by the user, or may be automatically input by an image recognition AI or the like that analyzes the external shape data D2. Next, the measured data extraction means 22 calculates the measured value of the object to be measured based on the instruction data. Furthermore, the measured data extraction means 22 extracts the length of the flat plate a in the transverse direction (y-axis direction), the length of the flat plate a in the longitudinal direction (x-axis direction), and the coordinates of the holes b and c from the reference point P1. , the diameter of hole b, the radius of the curved portion of hole c, etc. are calculated.

The actual measurement data extraction means 22 assigns identification numbers E1 to E7, for example, as shown in Table 1, to the actual measurement values of the object to be measured, and creates an actual measurement value record. The measured data extraction means 22 further adds information on the measurement object and data type extracted based on the instruction data input by the user to the measured value record. The measured data extraction means 22 stores a list of these measured value records in the storage unit 30 as measured data D4. Therefore, in this embodiment, each of the actual measurement value records includes data such as an identification number, a measurement target, a data type, and an actual measurement value. Note that e1 to e10 shown in Table 1 are numerical values representing actually measured values.

(Auxiliary line extraction means)
The auxiliary line extracting means 23 extracts dimension auxiliary lines from the design drawing data D1 using the external shape data D2 superimposed by the superimposing means 21. In this embodiment, the auxiliary line extracting means 23 extracts dimension auxiliary lines by deleting from the design drawing data D1 the outline lines of the design drawing data D1 specified by the superimposing means 21 as described above. FIG. 5 shows dimension extension lines and design dimension values extracted from the design drawing data D1. Thereby, it is possible to avoid confusion between the dimension extension line and the outline line of the outline data D2. Further, the design data extraction means 24 described later can extract the design data D6 with higher accuracy. Note that in order to reliably delete the outline lines of the design drawing data D1, a process may be performed in which the width of the outline lines of the outline data D2 is increased in advance.

In this embodiment, when deleting the outline of the design drawing data D1 from the design drawing data D1, the intersection of the outline and the dimension extension line is also deleted. Therefore, as shown in FIG. 5, the dimension extension lines extracted by the extension line extraction means 23 are partially missing. The missing portions of the dimension extension lines are, for example, Q1 to Q3 in FIG. The broken line R in FIG. 5 is the deleted outline line.

As described above, the design drawing data D1 from which the outline lines have been deleted consists of partially missing dimension extension lines and design dimension values. The auxiliary line extracting means 23 complements the missing portions Q1 to Q3 of the dimension auxiliary lines, and then extracts the completed dimension auxiliary lines and design dimension values. Examples of methods for supplementing dimension extension lines include a method of identifying a missing portion equal to the width of the outline line of the superimposed outline data D2 and connecting the missing part. The auxiliary line extracting means 23 stores data including the complemented dimension auxiliary lines and design dimension values in the storage unit 30 as analytical design drawing data D5. The analysis design drawing data D5 is shown in FIG.

(Design data extraction means)
The design data extraction means 24 extracts the design data D6 of the object to be measured from the design drawing data D1 using the dimension extension lines extracted by the extension line extraction means 23. In this embodiment, the design data extracting means 24 extracts the design data D6 of the object to be measured using the analysis design drawing data D5 including supplemented dimension extension lines and design dimension values. The procedure by which the design data extraction means 24 extracts the design data D6 of the object to be measured is, for example, as follows. First, as shown in FIG. 6, the intersection points or end points of the dimension extension lines are extracted as P1 to P7. Then, for each intersection point or end point, the coordinates from the reference point P1 are calculated based on the design dimension values. For example, the x-axis direction position of P3 is the design dimension value (x11) of numerical information x1, and the y-axis direction position of P3 is the design dimension value (y11) of numerical information y1 and the design dimension value (y21) of numerical information y2. Calculate as the sum (y11+y21). Then, calculate the distance between the intersection points or endpoints. For example, the distance between P1 and P2 is calculated as the design dimension value (y11) of the numerical information y1. In this embodiment, the coordinates of all intersection points or end points are calculated, and the distances between the intersection points or end points are calculated for all combinations. Among the calculated coordinates and distances, unnecessary ones are appropriately deleted by manual correction described later. Furthermore, for design dimension values indicating the diameter of the hole or the radius of the curved portion of the hole, it is determined from the direction and shape of the dimension extension line that the data type is diameter or radius. The above-mentioned procedure in which the design data extraction means 24 extracts the design data D6 of the object to be measured is a machine learning method capable of reading, for example, design dimension values and extracting distances between intersection points or end points corresponding to the design dimension values. It may be realized by a program, image recognition AI, or a combination thereof.

The design data extraction means 24 creates a design value record in which identification numbers F1 to F9 are assigned to the design values of the object to be measured, as shown in Table 2, for example. The design data extraction means 24 further adds information on the measurement object and data type extracted in the above-described procedure to the design value record. The design data extraction means 24 stores a list of these design value records in the storage unit 30 as design data D6. Therefore, in this embodiment, each of the design value records includes data such as a measurement target, data type, design dimension value, and tolerance. Further, Table 2 shows some of the design value records stored by the design data extraction means 24.

(Means of comparison)
The comparison means 25 compares the actual measurement data D4 and the design data D6 while associating them with each other. In this embodiment, the comparison means 25 associates the actual value record created by the actual measurement data extraction means 22 with the design value record created by the design data extraction means 24. As a method for making the correspondence, for example, refer to the data type and actual measurement value for each of the actual measurement value records E1 to E7, and select a design value record that approximates the data type and design dimension value from the design value records F1 to F9. It will be done. As a result, for example, the correspondence between the actual measurement value record E1 and the design value record F1, the correspondence between the actual measurement value record E2 and the design value record F2, the association between the actual measurement value record E3 and the design value record F3, and the association between the actual measurement value record E4 and the design value record F4, the correspondence between the actual measurement value record E5 and the design value record F5, the correspondence between the actual measurement value record E6 and the design value record F6, and the correspondence between the actual measurement value record E7 and the design value record F7. The attachment is executed. The comparison means 25 creates comparison result data D7 including a group of actual value records and a group of design value records, with the associated actual value records and design value records arranged so as to be comparable, and stores it in the storage unit 30. do. Note that, in this embodiment, the design value records E8, E9, etc. that have not been associated are also included in the comparison result data D7.

For example, when there are a plurality of design value records with similar data types and design dimension values, the comparison means 25 may associate incorrect combinations of actual measured value records and design value records. In consideration of this point, the comparing means 25 may have a function of displaying the comparison result data D7 on an external terminal and requesting confirmation from the user. This function allows the user to manually correct the correspondence between the measured value record and the design value record in the comparison result data D7 by operating the external terminal. Furthermore, the comparing means 25 also displays uncorrelated design value records such as design value records E8 and E9 on the external terminal. This allows the user to delete unnecessary design value records and the like from the comparison result data D7.

(Evaluation means)
The evaluation means 26 evaluates the measured data D4 based on the design data D6. More specifically, the evaluation means 26 determines whether the actual measured value of each actual measured value record of the comparison result data D7 falls within the tolerance range of the corresponding design value record. The evaluation means 26 stores evaluation result data D8 in which the determination result is added to the comparison result data D7 in the storage unit 30.

It is assumed that the design data extracting means 24 may not be able to appropriately extract tolerance values from the analytical design drawing data D5, for example. In consideration of this point, the evaluation means 26 may have a function of displaying the evaluation result data D8 on an external terminal and requesting confirmation from the user. This function allows the user to manually correct the tolerances and judgment results in the evaluation result data D8 by operating the external terminal.

<Storage section>
The storage unit 30 is a storage medium built into the inspection apparatus 100. As the storage unit 30, a known hard disk or the like can be used.

[Inspection method]
An inspection method according to an embodiment of the present invention is an inspection method for inspecting the dimensions of an object to be measured, in which an outline of the object to be measured, a design dimension value, and an association between the outline line and the design dimension value are provided. A design information acquisition step S1 that imports a design drawing including dimension extension lines, an outline image acquisition step S2 that imports an outline image of the object to be measured corresponding to the design drawing, and design drawing data D1 acquired in the design information acquisition step S1. and the outer shape data D2 of the object to be measured obtained in the outer shape image acquisition step S2, a superimposing step S3 of superimposing the outer shape data D2 of the object to be measured, and a measured data extraction step of extracting the actual measured data D4 of the object to be measured from the outer shape data D2; Auxiliary line extraction step S5 extracts dimension extension lines from the design drawing data D1 using the external shape data D2 superimposed in the alignment step S3, and a design drawing using the dimension extension lines extracted in the extension line extraction step S5. A design data extraction step S6 for extracting the design data D6 of the object to be measured from the data D1, a comparison step S7 for comparing the actual measurement data D4 and the design data D6 while associating them, and actual measurement data D4 based on the design data D6. and an evaluation step S8 for evaluating.

The inspection method can be executed using, for example, the inspection apparatus 100 described above. In this case, the content of the design information acquisition step S1 is the execution content of the design information acquisition means 11 mentioned above, the content of the outline image acquisition step S2 is the execution content of the outline image acquisition means 12 mentioned above, and the content of the superposition step S3 is the execution content of the outline image acquisition means 12 mentioned above. The execution contents of the above-mentioned superimposition means 21 and the contents of the execution data extraction step S4 are the same as the execution contents of the execution data extraction means 22 mentioned above, and the contents of the auxiliary line extraction step S5 are the same as the execution contents of the auxiliary line extraction means 23 mentioned above. The content of the design data extraction step S6 is the execution content of the above-mentioned design data extraction means 24, the content of the comparison step S7 is the execution content of the above-mentioned comparison means 25, and the content of the evaluation step S8 is the execution content of the above-mentioned evaluation means 26. The content can be the same.

[program]
In order to inspect the dimensions of the object to be measured, the program according to an embodiment of the present invention includes an outline of the object to be measured, a design dimension value, and a dimension extension line that associates the outline and the design dimension value. A design information acquisition step S1 that imports a design drawing; an outline image acquisition step S2 that imports an outline image of the object to be measured corresponding to the design drawing; design drawing data D1 acquired in the design information acquisition step S1; and the outline image. A superimposition step S3 of superimposing the external shape data D2 of the object to be measured obtained in the acquisition step S2, an actual measurement data extraction step S4 of extracting actual measurement data D4 of the object to be measured from the external shape data D2, and an overlapping step S3 An auxiliary line extraction step S5 extracts dimension extension lines from the design drawing data D1 using the external shape data D2 superimposed in A design data extraction step S6 for extracting the design data D6 of the object to be measured, a comparison step S7 for comparing the actual measurement data D4 and the design data D6 while associating them, and evaluating the actual measurement data D4 based on the design data D6. The inspection device is caused to perform the evaluation step S8.

The program can be used, for example, to execute the inspection device 100 described above. In this case, the program may be built into the inspection device 100. Further, the program causes the inspection apparatus 100 to execute a design information acquisition step S1, an external image acquisition step S2, a superposition step S3, an actual measurement data extraction step S4, an auxiliary line extraction step S5, a design data extraction step S6, and a comparison step S7. The evaluation step S8 can be the same as the corresponding step of the above-described inspection method.

The program may be a single program, or may be a collection of multiple programs that operate and cooperate in each of the above steps.

[advantage]
The inspection apparatus 100, the inspection method, or the program extracts dimension extension lines from the design drawing of the object to be measured using the external shape data D2. Therefore, even if the design drawing is printed on paper as in this embodiment, the design data D6 of the object to be measured can be accurately extracted. Therefore, according to the inspection apparatus 100, the inspection method, or the program, the effort of visually reading the design data D6 and the effort of manually inputting the read contents in order to inspect the dimensions of the object to be measured can be reduced. It can be significantly reduced. Therefore, dimensions on the design drawing can be easily and reliably compared with actual measurements.

[Other embodiments]
The above embodiments do not limit the configuration of the present invention. Therefore, in the above embodiment, it is possible to omit, replace, or add components of each part of the above embodiment based on the description of this specification and common general technical knowledge, and all of these are interpreted as falling within the scope of the present invention. Should.

In the above embodiment, the object to be measured is a flat plate having a hole and having a rectangular shape in plan view, but the present invention can be used for an object to be measured of any shape.

In the above embodiment, the external image acquisition means is an image sensor that captures an external image of the object to be measured taken from a direction corresponding to the design drawing, but the configuration of the present invention is not limited to this. The external image acquisition means may be an image sensor that takes a three-dimensional image, and in this case may read a cross-sectional image of the object. At this time, data other than the cross-sectional image, such as height data, may be deleted from the outer shape data acquired by the outer shape image acquisition means.

In the above embodiment, the outline image acquisition means acquires the outline of the object to be measured and the outline of the hole by edge detection. may be detected. Further, the outline detected by the outline image acquisition means is not limited to a rectangular shape, a circular shape, or an oval shape.

The extension line extraction means and design data extraction means of the present invention may have a function of requesting the user to confirm the output dimension extension lines and design data, and re-executing the extraction based on the extraction conditions adjusted by the user. good.

In the embodiment described above, the inspection device is connected to an external terminal for the user to operate from the outside, but the inspection device may include a monitor or the like that displays superimposed data and the like. Alternatively, a configuration may be adopted in which the user directly operates the inspection device.

In the above embodiment, the inspection device is provided with a storage section, but the storage section may be placed in an external terminal etc. connected to the inspection device.

In the embodiment described above, it is assumed that the program is built into the inspection device, but the program may be one that causes the inspection device to execute each process from the outside.

The inspection device according to one aspect of the present invention can easily and reliably compare dimensions on a design drawing with actual measured values, and thus can be used for quality evaluation of an object to be measured.

100 Inspection device 10 Input section 11 Design information acquisition means 12 External image acquisition means 20 Processing section 21 Overlaying means 22 Actual data extraction means 23 Auxiliary line extraction means 24 Design data extraction means 25 Comparison means 26 Evaluation means 30 Storage section

The present invention relates to an inspection device, an inspection method, and a program.

Generally, a shape inspection device measures the dimensions of each part of an object to be measured using an image sensor or the like. Furthermore, the measured dimensions are compared with the dimensions of the design drawing, etc., in order to evaluate the quality of the object to be measured. When making a comparison, it may be necessary to input the dimensions on the design drawing so that they can be compared with the measured dimensions. In particular, when the design drawings are recorded on paper media, it is necessary to manually input the dimensions on the design drawings that have been visually read. Therefore, it is desired to save labor and shorten the working time of such work.

Patent Document 1 discloses a measurement setting data creation method that includes a design value information extraction means for extracting design value information consisting of design values close to measured dimension values from the design data using design data created from CAD data or the like. The equipment is described. Further, Patent Document 1 describes that dimension measurement of the object to be measured and evaluation in comparison with tolerances are further performed based on the above-mentioned design value information etc. (measurement setting data) associated with the measurement target location. There is.

Japanese Patent Application Publication No. 2012-37257

However, in Patent Document 1, it is assumed that the design data includes in advance position information of shape lines, position information of dimension lines, design values and tolerances associated with the dimension lines, and the like. For this reason, it is difficult to directly extract design value information from a design drawing on a paper medium using the measurement setting data creation device of Patent Document 1. Regarding this point, a method of mechanically reading the design drawings in advance using OCR or the like may be considered. However, in order to extract the design values associated with the dimension lines, it is necessary to identify the outline of the object to be measured and the dimension extension lines described in the design drawing. When the outline line and the dimension extension line of the object to be measured are written with the same line type, it is difficult to distinguish them by the line type, for example. Therefore, it is not easy to mechanically extract design value information from design drawings.

The present invention has been made based on such circumstances, and an object of the present invention is to provide an inspection device that can easily and reliably compare dimensions on a design drawing with actual measurements.

An inspection device according to one aspect of the present invention, which has been made to solve the above problems, is an inspection device that inspects the dimensions of an object to be measured, and the inspection device inspects the outline of the object to be measured, design dimension values , and the outline of the object. and design information acquisition means for capturing a design drawing including dimension lines and dimension extension lines for associating the design dimension values with the design dimension values; superimposition means for superimposing design drawing data acquired by the information acquisition means and external shape data of the object to be measured acquired by the external image acquisition means; and actual measurement for extracting actual measurement data of the object to be measured from the external shape data. a data extraction means; a dimension line data extraction means for extracting the dimension line and the dimension extension line from the design drawing data using the external shape data superimposed by the superimposition means; a design data extraction means for extracting design data of the object to be measured from the design drawing data using the extracted dimension lines and dimension auxiliary lines; and a comparison between the measured data and the design data while associating them with each other. and an evaluation means for evaluating the measured data based on the design data.

The inspection device according to one aspect of the present invention can easily and reliably compare dimensions on a design drawing with actual measurements.

FIG. 1 is a block diagram showing the configuration of an inspection device according to an embodiment of the present invention. FIG. 2 is a schematic diagram showing a design drawing read by the inspection device of FIG. FIG. 3 is a schematic diagram showing an external image of the object read by the inspection device of FIG. 1. FIG. 4 is a schematic diagram showing outline data obtained by extracting outline lines from the image shown in FIG. FIG. 5 is a schematic diagram showing dimension lines, dimension extension lines, and numerical information extracted from the design drawing data of FIG. 2. FIG. 6 is a schematic diagram showing a state in which the dimension lines and dimension extension lines in FIG. 5 are complemented. FIG. 7 is a flow diagram showing an inspection method according to an embodiment of the present invention.

[Description of embodiments of the present invention]
First, embodiments of the present invention will be listed and explained.

An inspection device according to one aspect of the present invention is an inspection device that inspects the dimensions of a workpiece, and the test device correlates the outline and design dimension values of the workpiece , and the outline and design dimension values. a design information acquisition means for importing a design drawing including dimension lines and dimension extension lines; an external image acquisition means for importing an external image of the object to be measured corresponding to the design drawing; and design drawing data acquired by the design information acquisition means. and the outer shape data of the object to be measured acquired by the outer shape image acquiring means, a superimposing means for superimposing the outer shape data of the object to be measured, an actual measurement data extracting means for extracting actual measurement data of the object from the outer shape data, and the superimposing means dimension line data extraction means for extracting the dimension line and the dimension assistance line from the design drawing data using the superimposed external shape data; and the dimension line and the dimension extracted by the dimension line data extraction means. a design data extraction means for extracting design data of the object to be measured using auxiliary lines; a comparison means for comparing the actual measurement data and the design data while associating them; and an evaluation means for evaluating.

The inspection device includes the dimension line data extraction means for extracting the dimension line and the dimension extension line from the design drawing data using the external shape data, so that Even if there is a mixture of the following, the design data of the object to be measured can be accurately extracted. Therefore, according to the inspection device, when the design drawing is a paper medium, it is possible to significantly reduce the effort required to visually read the design data in order to inspect the dimensions of the object to be measured. Therefore, dimensions on the design drawing can be easily and reliably compared with actual measurements. Note that the term "outline line" herein refers to a line indicating the outer edge of the object to be measured, and a boundary line between parts of different shapes in an internal region surrounded by the outer edge. Examples of "boundary lines between parts with different shapes" include boundaries between parts with different heights, boundaries between recesses or holes, boundaries between flat parts and curved parts or sloped parts, etc. .

It is preferable that the design drawing is data or image data derived from a paper medium. When the design drawing is such data, the effect of the present invention, which can accurately extract the design data of the object to be measured from the design drawing data, is more clearly exhibited. Note that "data derived from paper media" herein refers to figures, lines, numbers, codes, etc. expressed on paper, and includes both handwritten data and printed data on paper. It also includes figures, lines, numbers, codes, etc. on paper that are imported into a computer by scanning the paper. "Image data" is data drawn as an image, and means that each element included in the image, such as figures, lines, numbers, codes, etc., is not identified or structured as data.

It is preferable that the outline image acquisition means extracts the outline of the outline image by edge detection after capturing the outline image, and the outline data includes this outline. In this way, the outline image acquisition means extracts the outline line of the outline image, and the outline data includes this outline line, so that the dimension line and the dimension auxiliary line can be more easily extracted from the design drawing data. can do.

It is preferable that the superimposing means adjusts the magnification of at least one of the design drawing data and the external shape data. In this manner, the overlapping means can more reliably extract the dimension extension line from the design drawing data by adjusting the magnification of at least one of the design drawing data and the external shape data.

When the external shape data includes the external outline line, the superimposing means uses the external outline line included in the external shape data to identify the external outline line included in the design drawing data, and extracts the dimension line data. Preferably, the means deletes the outline from the design drawing data. In this way, the superimposition means identifies the outline lines included in the design drawing data, and the dimension line data extraction means deletes the outline lines from the design drawing data, thereby making it easier to extract the outline lines from the design drawing data. The above-mentioned dimension line and the above-mentioned dimension extension line can be extracted from .

An inspection method according to another aspect of the present invention is an inspection method for inspecting the dimensions of an object to be measured, which includes an outline of the object to be measured, a design dimension value , and an outline and the design dimension value of the object to be measured. a design information acquisition step that imports a design drawing including dimension lines and dimensional extension lines to be associated; an external image acquisition step that imports an external image of the object to be measured that corresponds to the design drawing; and a design acquired in the design information acquisition step. a superimposition step of superimposing the drawing data and the external shape data of the object to be measured acquired in the external image acquisition step; an actual measurement data extraction step of extracting actual measurement data of the object from the external shape data; a dimension line data extraction step of extracting the dimension line and the dimension assistance line from the design drawing data using the external shape data superimposed in the alignment step; and the dimension line and dimension line extracted in the dimension line data extraction step. a design data extraction step of extracting the design data of the object to be measured from the design drawing data using the dimension extension lines; a comparison step of comparing the actual measurement data and the design data while associating them with each other; and an evaluation step of evaluating the measured data based on the data.

Since the inspection method includes the step of extracting the dimension line data , it greatly reduces the effort required to visually read the design data in order to inspect the dimensions of the object, especially when the design drawing is on paper. can do. Therefore, dimensions on the design drawing can be easily and reliably compared with actual measurements.

A program according to another aspect of the present invention includes, in order to inspect the dimensions of the object to be measured, an outline of the object to be measured, a design dimension value , and a dimension line for associating the outline and the design dimension value. a design information acquisition step of importing a design drawing including dimension extension lines; an outline image acquisition step of importing an outline image of the object to be measured corresponding to the design drawing; the design drawing data acquired in the design information acquisition step; A superimposition step of superimposing the external shape data of the object to be measured obtained in the external image acquisition step, an actual measurement data extraction step of extracting actual measurement data of the object from the external shape data, and superimposition in the overlapping step. a dimension line data extraction step of extracting the dimension line and the dimension extension line from the design drawing data using the extracted external shape data; and a dimension line data extraction step of extracting the dimension line and the dimension extension line extracted in the dimension line data extraction step. a design data extraction step of extracting the design data of the object to be measured from the design drawing data using the above design data; a comparison step of associating and comparing the measured data with the design data; The inspection device is caused to perform an evaluation step of evaluating the measured data.

Since the program executes the dimension line data extraction process, it greatly reduces the effort required to visually read the design data in order to inspect the dimensions of the object to be measured, especially when the design drawing is on paper. It is possible to run the inspection device at the same time. Therefore, dimensions on the design drawing can be easily and reliably compared with actual measurements.

[Details of embodiments of the present invention]
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings as appropriate.

[Inspection equipment]
The inspection apparatus 100 in FIG. 1 inspects the dimensions of an object to be measured. The inspection device 100 includes an input section 10 that takes in input data, a processing section 20 that processes the input data taken in by the input section 10, and a storage section 30 that stores the input data or data processed by the processing section 20. Equipped with. Further, the inspection device 100 is connected to an external terminal (not shown) for a user to operate from the outside. The inspection apparatus 100 may include a mounting table on which the object to be measured is mounted.

<Input section>
The input unit 10 includes a design information acquisition means 11 for importing a design drawing including an outline of the object to be measured, design dimension values, and dimension lines and dimension extension lines for associating the outline and the design dimension values; A contour image acquisition means 12 is provided for capturing an contour image of the object to be measured corresponding to the drawing.

(Object to be measured)
The object to be measured is, for example, a machined part such as an automobile part. Further, electronic device parts such as BGA, PCB base materials, connector pins, resin molded products, etc. may be used. The present embodiment will be described using a flat plate A having a rectangular shape in plan view as an example of the object to be measured. More specifically, the object to be measured has a circular hole B and an oval hole C. However, the object to be measured of the present invention is not limited to the above-mentioned object.

(Design drawing)
In this embodiment, the design drawings are printed on paper. That is, while the contents described in the design drawings can be read visually by humans, they need to be appropriately converted into data in order to be processed mechanically. As shown in FIG. 2, the design drawing includes the outline of the rectangular flat plate A, the outlines of the circular hole B and the oval hole C in the internal area surrounded by the outline, and Numerical information x1, x2, y1 to y4, z1, and z2 in which design dimension values and tolerances of the outline lines are described, and a plurality of dimension lines and dimension extension lines that associate the above-mentioned outline lines and the above-mentioned numerical information are described. There is. Each of the numerical information has design dimension values and tolerances, and for example, the numerical information x1 is written in a format such as x11±x12. In this case, x11 indicates the design dimension value, and x12 indicates the tolerance. That is, it means that the length of the portion corresponding to the numerical information x1 is allowed to be from x11-x12 to x11+x12. In this embodiment, it is assumed that the numerical information x2, y1 to y4, z1, and z2 are also written in the same format as the numerical information x1 described above. Further, in FIG. 2, the dimension line is a line including an arrow, and the dimension auxiliary line is a line connecting the tip of the arrow and the outline line or a line connecting the tip of the arrow and the center of the hole. That is, the dimension line and the dimension supplementary line are the portions of FIG. 2 excluding the outline line and numerical information. In the above design drawing, the above-mentioned outline line , the above-mentioned dimension line , and the above-mentioned dimension assistance line are described with the same line type and thickness, but in FIG. It is written thicker than the auxiliary line.

(Design information acquisition means)
The design information acquisition means 11 is realized, for example, by a program that imports design drawings read by a scanner. The scanner may be built into the inspection device 100 or may be placed outside. As the above-mentioned scanner and the above-mentioned program, known ones can be employed.

The design information acquisition means 11 captures the design drawing as design drawing data D1, and then stores the design drawing data D1 in the storage unit 30. The design drawing data D1 is data including, for example, the above-mentioned outline line derived from the design drawing, the above-mentioned design dimension value , the above-mentioned dimension line , and the above-mentioned dimension extension line. As mentioned above, in the design drawing, the above outline line , the above dimension line , and the above dimension assistance line are described with the same line type and thickness, so in the design drawing data D1, the above outline line , the above dimension line , and the above dimension It is difficult to identify auxiliary lines by line type and thickness.

The design information acquisition means 11 identifies at least lines including arrows, lines not including arrows (including the outline line , dimension line, and dimension extension line ), and the numerical information regarding the design drawing, and , the design drawing data D1 are stored in the storage unit 30. These identifications are performed using, for example, image recognition AI.

(Outline image acquisition means)
The external image acquisition means 12 is, for example, an image sensor that captures an external image of the object to be measured placed on the mounting table of the inspection apparatus 100, which is photographed from a direction corresponding to the design drawing. A known image sensor can be used as this image sensor. As shown in FIG. 3, the external image of the object to be measured includes a rectangular flat plate a, a circular hole b and an oval hole c formed inside the flat plate. The external image may be a black and white image or a color image. In this embodiment, the outline image acquisition means 12 extracts outline lines in the outline image by edge detection after capturing the outline image. As a result, the outline image acquisition means 12 acquires the outline data D2 including the outline line. The acquired external shape data D2 is stored in the storage unit 30. As shown in FIG. 4, the outline data D2 includes the outline of the rectangular flat plate a extracted by edge detection, and the outlines of the circular hole b and the oval hole c. If the external shape data D2 includes data other than the above-mentioned external outline line, for example, data regarding color or color shading, the external image acquisition means 12 may delete these data.

<Processing section>
The processing section 20 includes a superposition means 21, an actual measurement data extraction means 22, a dimension line data extraction means 23, a design data extraction means 24, a comparison means 25, and an evaluation means 26. The overlaying means 21, the measured data extraction means 22, the dimension line data extraction means 23, the design data extraction means 24, the comparison means 25, and the evaluation means 26 are each realized by a program built into the inspection apparatus 100, for example.

(Overlapping means)
The superimposition means 21 superimposes the design drawing data D1 acquired by the design information acquisition means 11 and the external shape data D2 of the object to be measured acquired by the external image acquisition means 12. The superimposing means 21 adjusts so that the outline of the design drawing data D1 and the outline of the outline data D2 match most. For example, the adjustment procedure is as follows. First, the maximum numerical value included in the numerical information is extracted from the design drawing data D1, and a line including the above-mentioned arrow corresponding to that numerical value is selected. On the other hand, the longest outline is selected from the outlines of the outline data D2. Then, the size of at least one of the design drawing data D1 and the outline data D2 is adjusted so that the length of the line including the arrow and the outline line match. Thereafter, the position of at least one of the design drawing data D1 and the outline data D2 is adjusted or rotated so that the line not including the arrow in the design drawing data D1 and the outline line of the outline data D2 match most. The coincidence between the line not including the arrow in the design drawing data D1 and the outline line in the outline data D2 is evaluated by a known pattern matching method such as normalized correlation, Hough transform, or feature point detection. By superimposing the design drawing data D1 and the external shape data D2 by the superimposition means 21 in this way, the dimension line data extraction means 23 described later more easily extracts the dimension lines and dimension extension lines from the design drawing data D1. be able to.

After adjusting the outline of the design drawing data D1 and the outline of the outline data D2, the overlapping means 21 stores the overlaid design drawing data D1 and outline data D2 in the storage unit 30 as overlapping data D3. store. For example, if the superimposition means 21 mistakenly extracts the above-mentioned outline, there is a possibility that the superposition data D3 is stored in a state where the design drawing data D1 and the outline data D2 are incorrectly superimposed. In consideration of this point, the superposition means 21 may have a function of displaying the superposition data D3 on an external terminal and requesting confirmation from the user. This function allows the user to manually adjust the size, position, etc. of the design drawing data D1 or the external shape data D2 by operating an external terminal.

The overlapping unit 21 specifies the overlapping portion between the design drawing data D1 and the outline data D2 in the overlapping data 30 as an outline line included in the design drawing data D1.

In this embodiment, the superimposition means 21 is configured to provide a reference point, an x-axis direction and a y-axis direction for calculating the coordinates of the outline line, etc. included in each of the design drawing data D1 and the outline data D2 after the above-mentioned adjustment. Determine. The method of determining these reference points, the x-axis direction, and the y-axis direction is not particularly limited. In this embodiment, the reference point of the design drawing data D1 is P1 located at the lower left corner of the flat plate A as shown in FIG. 2, and the reference point of the external shape data D2 is P1 located at the lower left corner of the flat plate A as shown in FIG. This is p1 located at the corner. In addition, in this embodiment, the x-axis direction and y-axis direction of the design drawing data D1 are set to be parallel to two contour lines extending orthogonally from the reference point P1, and the x-axis direction and the y-axis direction of the contour data D2 are The direction is determined to be parallel to two outline lines extending perpendicularly from the reference point p1. In the superposition data 30, the position, x-axis direction, and y-axis direction of the reference point P1 of the design drawing data D1 coincide with the position, x-axis direction, and y-axis direction of the reference point p1 of the external shape data D2, respectively.

(actual data extraction means)
The actual measurement data extraction means 22 extracts actual measurement data D4 of the object to be measured from the external shape data D2. In this embodiment, the measured data extraction means 22 extracts the measured data D4 of the object to be measured based on the outline of the external shape data D2. The measured data extracting means 22 extracts the measured data D4, for example, by the following procedure. At this time, instruction data for extracting the actual measurement data D4 is input to the inspection apparatus 100 prior to extraction of the actual measurement data D4. The above instruction data includes the shape of the extraction target (straight line, circle, ellipse, etc.), the distance between adjacent straight lines, the diameter of the circle, the radius of curvature of the ellipse, the distance between the centers of the circles, information on the range in which the extraction target is detected, etc. can be mentioned. The above-mentioned instruction data may be input manually by the user, or may be automatically input by an image recognition AI or the like that analyzes the external shape data D2. Next, the measured data extraction means 22 calculates the measured value of the object to be measured based on the instruction data. Furthermore, the measured data extraction means 22 extracts the length of the flat plate a in the transverse direction (y-axis direction), the length of the flat plate a in the longitudinal direction (x-axis direction), and the coordinates of the holes b and c from the reference point P1. , the diameter of hole b, the radius of the curved portion of hole c, etc. are calculated.

The actual measurement data extraction means 22 assigns identification numbers E1 to E7, for example, as shown in Table 1, to the actual measurement values of the object to be measured, and creates an actual measurement value record. The measured data extraction means 22 further adds information on the measurement object and data type extracted based on the instruction data input by the user to the measured value record. The measured data extraction means 22 stores a list of these measured value records in the storage unit 30 as measured data D4. Therefore, in this embodiment, each of the actual measurement value records includes data such as an identification number, a measurement target, a data type, and an actual measurement value. Note that e1 to e10 shown in Table 1 are numerical values representing actually measured values.

( Dimension line data extraction means)
The dimension line data extracting means 23 extracts dimension lines and dimension extension lines from the design drawing data D1 using the external shape data D2 superimposed by the superimposing means 21. In this embodiment, the dimension line data extraction means 23 deletes the outline of the design drawing data D1 specified by the superimposition means 21 as described above from the design drawing data D1, thereby extracting dimension lines, dimension extension lines, and design dimensions. Extract the value. FIG. 5 shows dimension lines, dimension extension lines, and design dimension values extracted from the design drawing data D1. Thereby, it is possible to avoid confusion between the dimension line and the dimension extension line and the outline line of the outline data D2. Further, the design data extraction means 24 described later can extract the design data D6 with higher accuracy. Note that the dimension line data extracting means 23 may execute a process of increasing the width of the outline line of the outline data D2 in advance in order to surely delete the outline line of the design drawing data D1.

In this embodiment, when deleting the outline of the design drawing data D1 from the design drawing data D1, the intersections of the outline, dimension lines, and dimension extension lines are also deleted. Therefore, as shown in FIG. 5, the dimension lines and dimension extension lines extracted by the extension line extraction means 23 are partially missing. The missing portions of the dimension lines and dimension extension lines are, for example, Q1 to Q3 in FIG. The broken line R in FIG. 5 is the deleted outline line.

As described above, the design drawing data D1 from which outline lines have been deleted consists of partially missing dimension lines, dimension extension lines, and design dimension values. The dimension line data extraction means 23 complements the missing portions Q1 to Q3 of the dimension lines and dimension extension lines, and then extracts the completed dimension lines, dimension extension lines, and design dimension values. As a method for complementing the dimension line and the dimension extension line, there is a method of identifying a missing part equal to the width of the outline line of the superimposed outline data D2 and connecting the missing part. The dimension line data extraction means 23 stores data including the completed dimension lines, dimension extension lines, and design dimension values in the storage unit 30 as analysis design drawing data D5. The analysis design drawing data D5 is shown in FIG.

(Design data extraction means)
The design data extraction means 24 uses the dimension lines and dimension auxiliary lines extracted by the dimension line data extraction means 23 to extract the design data D6 of the object to be measured from the design drawing data D1. In the present embodiment, the design data extracting means 24 extracts the design data D6 of the object to be measured using the design drawing data D5 for analysis including complemented dimension lines, dimension auxiliary lines, and design dimension values. The procedure by which the design data extraction means 24 extracts the design data D6 of the object to be measured is, for example, as follows. First, as shown in FIG. 6, the intersection points or end points of the dimension extension lines are extracted as P1 to P7. Then, for each intersection point or end point, the coordinates from the reference point P1 are calculated based on the design dimension values. For example, the x-axis direction position of P3 is the design dimension value (x11) of numerical information x1, and the y-axis direction position of P3 is the design dimension value (y11) of numerical information y1 and the design dimension value (y21) of numerical information y2. Calculate as the sum (y11+y21). Then, calculate the distance between the intersection points or endpoints. For example, the distance between P1 and P2 is calculated as the design dimension value ( y41 ) of numerical information y4 . In this embodiment, the coordinates of all intersection points or end points are calculated, and the distances between the intersection points or end points are calculated for all combinations. Among the calculated coordinates and distances, unnecessary ones are appropriately deleted by manual correction described later. Further, for design dimension values indicating the diameter of the hole or the radius of the curved portion of the hole, it is determined that the data type is diameter or radius from the direction and shape of the dimension line and dimension extension line. The above-mentioned procedure in which the design data extraction means 24 extracts the design data D6 of the object to be measured is a machine learning method capable of reading, for example, design dimension values and extracting distances between intersection points or end points corresponding to the design dimension values. It may be realized by a program, image recognition AI, or a combination thereof.

The design data extraction means 24 creates a design value record in which identification numbers F1 to F9 are assigned to the design values of the object to be measured, as shown in Table 2, for example. The design data extraction means 24 further adds information on the measurement object and data type extracted in the above-described procedure to the design value record. The design data extraction means 24 stores a list of these design value records in the storage unit 30 as design data D6. Therefore, in this embodiment, each of the design value records includes data such as a measurement target, data type, design dimension value, and tolerance. Further, Table 2 shows some of the design value records stored by the design data extraction means 24.

(Means of comparison)
The comparison means 25 compares the actual measurement data D4 and the design data D6 while associating them with each other. In this embodiment, the comparison means 25 associates the actual value record created by the actual measurement data extraction means 22 with the design value record created by the design data extraction means 24. As a method for making the correspondence, for example, refer to the data type and actual measurement value for each of the actual measurement value records E1 to E7, and select a design value record that approximates the data type and design dimension value from the design value records F1 to F9. It will be done. As a result, for example, the correspondence between the actual measurement value record E1 and the design value record F1, the correspondence between the actual measurement value record E2 and the design value record F2, the association between the actual measurement value record E3 and the design value record F3, and the association between the actual measurement value record E4 and the design value record F4, the correspondence between the actual measurement value record E5 and the design value record F5, the correspondence between the actual measurement value record E6 and the design value record F6, and the correspondence between the actual measurement value record E7 and the design value record F7. The attachment is executed. The comparison means 25 creates comparison result data D7 including a group of actual value records and a group of design value records, with the associated actual value records and design value records arranged so as to be comparable, and stores it in the storage unit 30. do. In addition, in this embodiment, the design value records F8, F9, etc. which were not matched are also included in the comparison result data D7.

For example, when there are a plurality of design value records with similar data types and design dimension values, the comparison means 25 may associate incorrect combinations of actual measured value records and design value records. In consideration of this point, the comparing means 25 may have a function of displaying the comparison result data D7 on an external terminal and requesting confirmation from the user. This function allows the user to manually correct the correspondence between the measured value record and the design value record in the comparison result data D7 by operating the external terminal. Furthermore, the comparing means 25 also displays uncorrelated design value records such as design value records F8 and F9 on the external terminal. This allows the user to delete unnecessary design value records and the like from the comparison result data D7.

(Evaluation means)
The evaluation means 26 evaluates the measured data D4 based on the design data D6. More specifically, the evaluation means 26 determines whether the actual measured value of each actual measured value record of the comparison result data D7 falls within the tolerance range of the corresponding design value record. The evaluation means 26 stores evaluation result data D8 in which the determination result is added to the comparison result data D7 in the storage unit 30.

It is assumed that the design data extracting means 24 may not be able to appropriately extract tolerance values from the analytical design drawing data D5, for example. In consideration of this point, the evaluation means 26 may have a function of displaying the evaluation result data D8 on an external terminal and requesting confirmation from the user. This function allows the user to manually correct the tolerances and judgment results in the evaluation result data D8 by operating the external terminal.

<Storage section>
The storage unit 30 is a storage medium built into the inspection apparatus 100. As the storage unit 30, a known hard disk or the like can be used.

[Inspection method]
An inspection method according to an embodiment of the present invention is an inspection method for inspecting the dimensions of an object to be measured, in which an outline of the object to be measured, a design dimension value , and a correspondence between the outline and the design dimension value are provided. A design information acquisition step S1 that imports a design drawing including dimension lines and dimension extension lines to be attached, an outline image acquisition step S2 that imports an outline image of the object to be measured corresponding to the design drawing, and a design information acquisition step S1 that A superposition step S3 of superimposing the design drawing data D1 and the external shape data D2 of the object to be measured acquired in the external image acquisition step S2, and an actual measurement data extraction step of extracting the actual measurement data D4 of the object to be measured from the external shape data D2. a dimension line data extraction step S5 in which dimension lines and dimension extension lines are extracted from the design drawing data D1 using the external shape data D2 superimposed in the superimposition step S3; A design data extraction step S6 in which the design data D6 of the object to be measured is extracted from the design drawing data D1 using dimension lines and dimension auxiliary lines, and a comparison step in which the actual measurement data D4 and the design data D6 are compared while being associated with each other. S7, and an evaluation step S8 of evaluating the measured data D4 based on the design data D6.

The inspection method can be executed using, for example, the inspection apparatus 100 described above. In this case, the content of the design information acquisition step S1 is the execution content of the design information acquisition means 11 mentioned above, the content of the outline image acquisition step S2 is the execution content of the outline image acquisition means 12 mentioned above, and the content of the superposition step S3 is the execution content of the outline image acquisition means 12 mentioned above. The execution contents of the above-mentioned superposition means 21 and the contents of the execution data extraction step S4 are the same as the execution contents of the execution data extraction means 22 mentioned above, and the contents of the dimension line data extraction step S5 are the execution contents of the above-mentioned dimension line data extraction means 23. The contents of the design data extraction step S6 correspond to the execution contents of the above-mentioned design data extraction means 24, the contents of the comparison step S7 correspond to the execution contents of the above-mentioned comparison means 25, and the contents of the evaluation step S8 correspond to the execution contents of the above-mentioned evaluation means 26. The execution content can be the same as that of .

[program]
In order to inspect the dimensions of the object to be measured, a program according to an embodiment of the present invention includes an outline of the object to be measured, a design dimension value , and a dimension line and dimensions that associate the outline and the design dimension value. A design information acquisition step S1 that imports a design drawing including auxiliary lines, an outline image acquisition step S2 that imports an outline image of the object to be measured corresponding to the design drawing, and design drawing data D1 acquired in the design information acquisition step S1. , a superimposition step S3 of superimposing the outer shape data D2 of the object to be measured acquired in the outer shape image acquisition step S2, and an actual measurement data extraction step S4 of extracting actual measurement data D4 of the object to be measured from the outer shape data D2; A dimension line data extraction step S5 in which dimension lines and dimension extension lines are extracted from the design drawing data D1 using the external shape data D2 superimposed in the superimposition step S3 ; a design data extraction step S6 of extracting the design data D6 of the object to be measured from the design drawing data D1 using dimension extension lines; a comparison step S7 of comparing the measured data D4 and the design data D6 while associating them; The inspection device is caused to perform an evaluation step S8 of evaluating the measured data D4 based on the design data D6.

The program can be used, for example, to execute the inspection device 100 described above. In this case, the program may be built into the inspection device 100. In addition, the program causes the inspection apparatus 100 to execute a design information acquisition step S1, an external image acquisition step S2, a superposition step S3, an actual measurement data extraction step S4, a dimension line data extraction step S5, a design data extraction step S6, and a comparison step. S7 and evaluation step S8 can be the same as the corresponding steps of the above-mentioned inspection method.

The program may be a single program, or may be a collection of multiple programs that operate and cooperate in each of the above steps.

[advantage]
The inspection apparatus 100, the inspection method, or the program extracts dimension lines and dimension extension lines from the design drawing of the object to be measured using the external shape data D2. Therefore, even if the design drawing is printed on paper as in this embodiment, the design data D6 of the object to be measured can be accurately extracted. Therefore, according to the inspection apparatus 100, the inspection method, or the program, the effort of visually reading the design data D6 and the effort of manually inputting the read contents in order to inspect the dimensions of the object to be measured can be reduced. It can be significantly reduced. Therefore, dimensions on the design drawing can be easily and reliably compared with actual measurements.

[Other embodiments]
The above embodiments do not limit the configuration of the present invention. Therefore, in the above embodiment, it is possible to omit, replace, or add components of each part of the above embodiment based on the description of this specification and common general technical knowledge, and all of these are interpreted as falling within the scope of the present invention. Should.

In the above embodiment, the object to be measured is a flat plate having a hole and having a rectangular shape in plan view, but the present invention can be used for an object to be measured of any shape.

In the above embodiment, the external image acquisition means is an image sensor that captures an external image of the object to be measured taken from a direction corresponding to the design drawing, but the configuration of the present invention is not limited to this. The external image acquisition means may be an image sensor that takes a three-dimensional image, and in this case may read a cross-sectional image of the object. At this time, data other than the cross-sectional image, such as height data, may be deleted from the outer shape data acquired by the outer shape image acquisition means.

In the above embodiment, the outline image acquisition means acquires the outline of the object to be measured and the outline of the hole by edge detection. may be detected. Further, the outline detected by the outline image acquisition means is not limited to a rectangular shape, a circular shape, or an oval shape.

The dimension line data extraction means and design data extraction means of the present invention have a function of requesting the user to confirm the output dimension lines, dimension extension lines, and design data, and re-executing the extraction based on the extraction conditions adjusted by the user. You may do so.

In the embodiment described above, the inspection device is connected to an external terminal for the user to operate from the outside, but the inspection device may include a monitor or the like that displays superimposed data and the like. Alternatively, a configuration may be adopted in which the user directly operates the inspection device.

In the above embodiment, the inspection device is provided with a storage section, but the storage section may be placed in an external terminal etc. connected to the inspection device.

In the embodiment described above, it is assumed that the program is built into the inspection device, but the program may be one that causes the inspection device to execute each process from the outside.

The inspection device according to one aspect of the present invention can easily and reliably compare dimensions on a design drawing with actual measured values, and thus can be used for quality evaluation of an object to be measured.

100 Inspection device 10 Input section 11 Design information acquisition means 12 External image acquisition means 20 Processing section 21 Overlaying means 22 Actual measurement data extraction means 23 Dimension line data extraction means 24 Design data extraction means 25 Comparison means 26 Evaluation means 30 Storage section

Claims (7)

An inspection device for inspecting the dimensions of an object to be measured,
a design information acquisition means for importing a design drawing including an outline of the object to be measured, design dimension values, and a dimension extension line that associates the outline and the design dimension values;
External image acquisition means for capturing an external image of the object to be measured corresponding to the design drawing;
Superimposing means for superimposing the design drawing data obtained by the design information obtaining means and the external shape data of the object to be measured obtained by the external shape image obtaining means;
Actual data extraction means for extracting actual measurement data of the object to be measured from the external shape data;
Auxiliary line extracting means for extracting the dimension auxiliary line from the design drawing data using the external shape data superimposed by the superimposing means;
Design data extraction means for extracting design data of the object to be measured from the design drawing data using the dimension extension lines extracted by the extension line extraction means;
Comparison means for comparing the actual measurement data and the design data while associating them;
and evaluation means for evaluating the measured data based on the design data. The inspection device according to claim 1, wherein the design drawing is data derived from a paper medium or image data. 3. The inspection apparatus according to claim 1, wherein the external shape image acquisition means extracts the external contour line of the external shape image by edge detection after capturing the external shape image, and the external shape data includes the external contour line. 4. The inspection apparatus according to claim 3, wherein the overlapping means adjusts a magnification of at least one of the design drawing data and the external shape data. The superimposition means identifies the outline line included in the design drawing data using the outline line included in the outline data, and the auxiliary line extraction means deletes the outline line from the design drawing data. 4. The inspection device according to claim 3, wherein the dimension extension line is extracted by extracting the dimension extension line. An inspection method for inspecting the dimensions of an object to be measured,
a design information acquisition step of importing a design drawing including an outline of the object to be measured, design dimension values, and a dimension extension line that associates the outline and the design dimension values;
an outline image acquisition step of capturing an outline image of the object to be measured corresponding to the design drawing;
an overlaying step of overlapping the design drawing data acquired in the design information acquisition step and the outer shape data of the object to be measured acquired by the outer shape image acquisition means;
an actual measurement data extraction step of extracting actual measurement data of the object to be measured from the external shape data;
an auxiliary line extraction step of extracting the dimension auxiliary line from the design drawing data using the external shape data superimposed in the superimposition step;
a design data extraction step of extracting design data of the object to be measured from the design drawing data using the dimension auxiliary lines extracted in the auxiliary line extraction step;
a comparison step of comparing the actual measurement data and the design data while associating them;
and an evaluation step of evaluating the measured data based on the design data. To inspect the dimensions of the object to be measured,
a design information acquisition step of importing a design drawing including an outline of the object to be measured, design dimension values, and a dimension extension line that associates the outline and the design dimension values;
an outline image acquisition step of capturing an outline image of the object to be measured corresponding to the design drawing;
an overlaying step of overlapping the design drawing data acquired in the design information acquisition step and the outer shape data of the object to be measured acquired by the outer shape image acquisition means;
an actual measurement data extraction step of extracting actual measurement data of the object to be measured from the external shape data;
an auxiliary line extraction step of extracting the dimension auxiliary line from the design drawing data using the external shape data superimposed in the superimposition step;
a design data extraction step of extracting design data of the object to be measured from the design drawing data using the dimension auxiliary lines extracted in the auxiliary line extraction step;
a comparison step of comparing the actual measurement data and the design data while associating them;
A program that causes an inspection device to execute an evaluation step of evaluating the measured data based on the design data.

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