JP2019158438A - Shape evaluation device, shape evaluation method, and shape evaluation program - Google Patents

Abstract

To provide a shape evaluation device, a shape evaluation method, and a shape evaluation program with which it is possible to conveniently perform shape-relating evaluation.SOLUTION: An evaluation index specification unit 510 reads an evaluation viewpoint specification mark from an evaluation object marked with an evaluation viewpoint specification mark as an evaluation viewpoint specification pattern that represents an evaluation viewpoint relating to a shape, and specifies an evaluation index for evaluating the shape of the evaluation object from the viewpoint represented by the evaluation viewpoint specification mark. An evaluation index calculation unit 22 acquires shape data from a three-dimensional scanner 200 that generates shape data representing the shape of the evaluation object by measuring the shape of the evaluation object, and calculates the value of the evaluation index specified by the evaluation index specification unit 510 using the shape data. An output unit 520 outputs the value of the evaluation index calculated by the evaluation index calculation unit 22 by optically projecting it to the surface of the evaluation object.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a shape evaluation apparatus, a shape evaluation method, and a shape evaluation program.

  As disclosed in Patent Document 1, by measuring the shape of a product, a laser scanner that generates shape data representing the shape of the product, and the shape of the product using the shape data generated by the laser scanner There is known a system including a shape evaluation apparatus that evaluates The shape evaluation apparatus evaluates the shape of the product from the viewpoint of how much the coaxiality of the cylindrical portion of the product is, and what is the size of a specific part of the product.

JP 2010-32380 A

  In the system, when it is desired to change the viewpoint of evaluation performed by the evaluation apparatus, the user must perform an operation for designating the viewpoint after the change at the stage of evaluating the product. For this reason, especially when it is desired to flexibly change the viewpoint of evaluation, the user's operation at the stage of evaluating the product becomes complicated.

  An object of the present invention is to provide a shape evaluation apparatus, a shape evaluation method, and a shape evaluation program capable of easily performing evaluation related to a shape.

In order to achieve the above object, a shape evaluation apparatus according to the present invention includes:
An evaluation index for reading the evaluation viewpoint specific pattern from an evaluation target object marked with an evaluation viewpoint specific pattern representing an evaluation viewpoint regarding the shape, and evaluating the shape of the evaluation target object from the viewpoint of the evaluation viewpoint specific pattern An evaluation index identifying means for identifying
The shape data is obtained from a measuring device that generates shape data representing the shape of the evaluation object by measuring the shape of the evaluation object, and is specified by the evaluation index specifying means using the shape data An evaluation index calculating means for calculating a value of the evaluation index;
An output means for outputting an evaluation result of the shape of the evaluation object specified from the value of the evaluation index calculated by the evaluation index calculating means or the value of the evaluation index;
Is provided.

  According to the above configuration, the evaluation index is specified by the evaluation viewpoint specifying pattern marked on the evaluation object. For this reason, it is possible to save the user from specifying the evaluation index at the stage of evaluating the shape of the evaluation object. Therefore, it is possible to easily evaluate the shape of the evaluation object.

The perspective view which illustrates the evaluation object concerning Embodiment 1 1 is a conceptual diagram illustrating a configuration of a shape evaluation apparatus according to a first embodiment. FIG. 3 is a conceptual diagram illustrating a configuration of an evaluation index identification table according to the first embodiment. The conceptual diagram which shows the function of the shape evaluation apparatus which concerns on Embodiment 1. Flowchart of shape evaluation method according to embodiment 1 The conceptual diagram which shows the aspect of the projection of the evaluation result to the evaluation target object concerning Embodiment 1 Conceptual diagram showing the configuration of an evaluation index identification table according to the second embodiment The perspective view which illustrates the evaluation subject concerning Embodiment 2. The conceptual diagram which shows the function of the shape evaluation apparatus which concerns on Embodiment 2. Conceptual diagram showing a configuration of an evaluation index identification table according to the third embodiment The conceptual diagram which shows the function of the shape evaluation apparatus which concerns on Embodiment 3. The conceptual diagram which shows the aspect of the projection of the evaluation result to the evaluation target object concerning Embodiment 3

  Hereinafter, Embodiments 1 to 3 of the present invention will be described with reference to the drawings. In the figure, the same or corresponding parts are denoted by the same reference numerals.

[Embodiment 1]
As shown in FIG. 1, an evaluation object 600 that is an object for evaluating a shape in this embodiment includes an evaluation viewpoint identification mark 611 as an evaluation viewpoint identification pattern that represents an evaluation viewpoint regarding the shape, and an evaluation viewpoint identification mark 611. Is marked with an evaluation result display field 612 in which the result of the evaluation in terms of is displayed by optical projection. The evaluation viewpoint identification mark 611 and the evaluation result display column 612 are marked with ink.

  The evaluation viewpoint identification mark 611 and the evaluation result display field 612 are marked on the evaluation target surface 610 that is the surface of the evaluation object 600 whose shape should be evaluated. Hereinafter, a shape evaluation apparatus for evaluating the shape of the evaluation object 600 will be described.

  As illustrated in FIG. 2, the shape evaluation apparatus 500 includes a three-dimensional scanner 200 as a measurement apparatus that generates shape data representing the shape of the evaluation object 600 by measuring the shape of the evaluation object 600, and the three-dimensional scanner. And an arithmetic and control unit 100 that performs an operation for evaluating the shape of the evaluation object 600 using the shape data generated by 200.

  The three-dimensional scanner 200 is based on the time difference from the time when the surface of the evaluation object 600 is irradiated with the laser light until the reflected light reflected by the surface of the evaluation object 600 is received, and the angle at which the laser light is irradiated. The three-dimensional shape of the evaluation object 600 is measured without contact.

  Thereby, the three-dimensional scanner 200 generates shape data representing the shape of the evaluation object 600. Specifically, the shape data refers to point cloud data that is a set of data representing the three-dimensional coordinates of each point on the surface of the evaluation object 600.

  The three-dimensional scanner 200 is of a handy type that can be carried by a user by hand. The user causes the 3D scanner 200 to measure at least the evaluation target surface 610 of the evaluation object 600 by holding and operating the 3D scanner 200 by hand.

  As described above, since the evaluation viewpoint identification mark 611 and the evaluation result display column 612 are attached to the evaluation target surface 610, the user may cause the three-dimensional scanner 200 to measure which surface of the evaluation object 600. Can be easily determined. In addition, by making the laser light emitted from the three-dimensional scanner 200 visible light, the user can confirm which surface of the evaluation object 600 is measured by the three-dimensional scanner 200.

  In addition, the shape evaluation apparatus 500 includes an imaging apparatus 300 that images the evaluation viewpoint identification mark 611 and the evaluation result display field 612 of the evaluation object 600. The imaging apparatus 300 includes a digital camera attached to the three-dimensional scanner 200.

  When the user measures the evaluation target surface 610 by the three-dimensional scanner 200, the user causes the imaging device 300 to pick up an image of an area including at least the evaluation viewpoint identification mark 611 and the evaluation result display column 612 on the evaluation target surface 610. Note that the measurement by the three-dimensional scanner 200 and the imaging by the imaging device 300 can be performed in parallel.

  The imaging apparatus 300 generates image data of an area including at least the evaluation viewpoint identification mark 611 and the evaluation result display field 622 on the evaluation target surface 610. Using the image data, the arithmetic and control unit 100 identifies the viewpoint of evaluation represented by the evaluation viewpoint identification mark 611, and evaluates the shape of the evaluation object 600 from the identified viewpoint.

  In addition, the shape evaluation apparatus 500 includes a projection apparatus 400 that optically projects the evaluation result by the arithmetic control apparatus 100 in the evaluation result display field 612 on the evaluation target surface 610 of the evaluation object 600. Projection apparatus 400 includes a liquid crystal projector attached to three-dimensional scanner 200.

  The projection device 400 is installed in the three-dimensional scanner 200 in a state in which a reference projection direction that is a projection direction serving as a reference of an image is adjusted to be equal to the angle of the imaging device 300 with respect to the evaluation target surface 610. The projection apparatus 400 has a configuration capable of projecting an image at an arbitrary position in the area captured by the imaging apparatus 300 by shifting the projection direction of the image with respect to the reference projection direction.

  The arithmetic control device 100 specifies the position of the evaluation result display field 612 using the image data generated by the imaging device 300. Then, the arithmetic and control unit 100 controls the projection direction of the image by the projection device 400 to adjust the position where the image is projected to the position of the evaluation result display field 612 on the evaluation target surface 610 and evaluates to that position. Project the result of.

  Hereinafter, the configuration of the arithmetic and control unit 100 will be specifically described. The arithmetic control device 100 includes an interface unit 10 that mediates transmission and reception of data and control signals between each of the three-dimensional scanner 200, the imaging device 300, and the projection device 400 and the arithmetic control device 100.

  The arithmetic control device 100 also includes a CPU (Central Processing Unit) 20 that performs arithmetic operations for evaluating the shape of the evaluation object 600 and controls the projection device 400, and a main storage unit 30 as a main memory of the CPU 20. .

  The main storage unit 30 stores shape data 31 generated by the three-dimensional scanner 200 and image data 32 generated by the imaging device 300, which are acquired by the arithmetic and control unit 100 through the interface unit 10. The CPU 20 performs various calculations and controls using the shape data 31 and the image data 32.

  The arithmetic control device 100 also includes an auxiliary storage unit 40 that stores a shape evaluation program 41 that defines the functions of the arithmetic control device 100. By executing the shape evaluation program 41, the CPU 20 develops a function for performing calculations for evaluating the shape of the evaluation object 600 and a function for controlling the projection device 400.

  The auxiliary storage unit 40 also stores an evaluation index specifying table 42 that is used when the CPU 20 performs processing for specifying the viewpoint of evaluation using the image data 32. Hereinafter, the evaluation index specifying table 42 will be specifically described.

  As shown in FIG. 3, the evaluation index specifying table 42 is a template pattern data representing each of a plurality of types of evaluation indices 42b for evaluating the shape of the evaluation object 600 and a pattern for identifying the evaluation index 42b. It defines a predetermined correspondence with the template mark data 42a.

  In FIG. 3, in order to facilitate understanding, each of the plurality of template mark data 42a is indicated by a mark represented by the template mark data 42a.

  In the evaluation index specifying table 42, straightness, flatness, roundness, cylindricity, and the like are defined as the evaluation index 42b. These evaluation indices 42b are defined according to JIS B0621.

  That is, straightness refers to the magnitude of the deviation from a geometrically correct straight line of a linear feature. Flatness is the amount of deviation from the geometrically correct plane of a planar feature. Roundness refers to the magnitude of deviation from a geometrically correct circle of a circular feature. Cylindricity refers to the amount of deviation from a geometrically correct cylinder of a cylindrical body.

  An evaluation viewpoint identification mark 611 corresponding to the mark represented by any one of the template mark data 42a is attached to the evaluation object 600. FIG. 1 illustrates an evaluation viewpoint identification mark 611 corresponding to a mark representing flatness. That is, the evaluation viewpoint identification mark 611 illustrated in FIG. 1 represents that the evaluation object 600 should be evaluated from the viewpoint of how flat the evaluation target surface 610 is.

  Hereinafter, with reference to FIG. 4, functions that are manifested when the CPU 20 illustrated in FIG. 2 executes the shape evaluation program 41 will be specifically described.

  As shown in FIG. 4, the CPU 20 reads the evaluation viewpoint specifying mark 611 from the evaluation object 600 and specifies the evaluation index 42b as an evaluation index specifying unit 510 that specifies the evaluation index 42b. The function of the specific mark recognition unit 21 is provided.

  The evaluation viewpoint identification mark recognition unit 21 collates which evaluation viewpoint identification mark 611 attached to the evaluation object 600 corresponds to the mark represented by which template mark data 42a. Specifically, the evaluation viewpoint identification mark recognition unit 21 first determines whether there is a pattern corresponding to the mark represented by any of the template mark data 42a in the image represented by the image data 32 generated by the imaging apparatus 300. Whether or not is verified by pattern matching.

  When the evaluation viewpoint identification mark 611 is detected as a pattern corresponding to the mark represented by the template mark data 42a, the evaluation viewpoint identification mark recognition unit 21 refers to the evaluation index identification table 42 and corresponds to the evaluation viewpoint identification mark 611. The evaluation index 42b associated with the template mark data 42a representing the mark is specified. In this way, the evaluation index 42b for evaluating the shape of the evaluation object 600 from the viewpoint represented by the evaluation viewpoint specifying mark 611 is specified.

  Further, the CPU 20 has a function of the evaluation index calculation unit 22 as an evaluation index calculation unit that calculates the value of the evaluation index 42b specified by the evaluation viewpoint identification mark recognition unit 21. The evaluation index calculation unit 22 acquires the shape data 31 from the three-dimensional scanner 200 and uses the shape data 31 to calculate the value of the evaluation index 42b.

  Further, the CPU 20 has a function of the projection position recognition unit 23 that specifies the position of the evaluation result display field 612 in the evaluation object 600 using the image data 32 generated by the imaging device 300. The projection position recognizing unit 23 collates, by pattern matching, whether or not a pattern corresponding to the shape of the evaluation result display field 612 exists in the image represented by the image data 32, whereby the position of the evaluation result display field 612 is checked. Is identified.

  Further, the CPU 20 has a function of the projection device control unit 24 that controls the projection device 400. The projection device control unit 24 configures an output unit 520 as an output unit that outputs the value of the evaluation index 42 b calculated by the evaluation index calculation unit 22 by projection together with the projection device 400.

  Specifically, the projection apparatus control unit 24 sets the evaluation index 42b calculated by the evaluation index calculation unit 22 at the position of the evaluation result display field 612 specified by the projection position recognition unit 23 with respect to the projection apparatus 400. Control to project values.

  Hereinafter, the shape evaluation method according to the present embodiment including the shape evaluation process executed by the shape evaluation apparatus 500 described above will be described with reference to FIG.

  As shown in FIG. 5, in this embodiment, as a marking step, an evaluation viewpoint specifying mark that represents a viewpoint of evaluation related to the shape of the evaluation target surface 610 on the evaluation target surface 610 whose shape in the evaluation object 600 is to be evaluated in advance. 611 is added (step S1). This marking is performed at the stage of manufacturing a product as the evaluation object 600.

  Then, in the stage of inspecting the product as the evaluation object 600, the user causes the three-dimensional scanner 200 to measure the shape of the evaluation target surface 610 of the evaluation target object 600 and causes the imaging device 300 to measure the shape of the evaluation target object 610. An area including at least the evaluation viewpoint identification mark 611 and the evaluation result display field 622 is imaged (step S2). Note that the measurement by the three-dimensional scanner 200 and the imaging by the imaging device 300 can be performed in parallel.

  Then, as an evaluation index identification step, the evaluation viewpoint identification mark recognition unit 21 uses the image data 32 generated by the imaging device 300 to evaluate the shape of the evaluation target surface 610 from the viewpoint of the evaluation viewpoint identification mark 611. The evaluation index 42b is identified (step S3).

  Specifically, the evaluation viewpoint identification mark recognition unit 21 first detects the evaluation viewpoint identification mark 611 as a pattern corresponding to the mark represented by any of the template mark data 42a from the image represented by the image data 32.

  Then, the evaluation viewpoint specifying mark recognizing unit 21 refers to the evaluation index specifying table 42 and specifies the evaluation index 42b associated with the template mark data 42a representing the mark corresponding to the evaluation viewpoint specifying mark 611.

  As a specific example, when the evaluation viewpoint identification mark 611 shown in FIG. 1 is detected from the image represented by the image data 32, according to the evaluation index identification table 42, the flatness is identified as the evaluation index 42b.

  Next, as the evaluation index calculation step, the evaluation index calculation unit 22 calculates the value of the evaluation index 42b specified by the evaluation viewpoint specifying mark recognition unit 21 using the shape data 31 acquired from the three-dimensional scanner 200 ( Step S4).

  As a specific example, when the flatness as the evaluation index 42b is calculated, the evaluation index calculation unit 22 first minimizes the sum of the distances to the respective points on the evaluation target surface 610 represented by the shape data 31. The virtual plane is specified by the least square method.

  Then, when the X-axis orthogonal to the virtual plane is assumed, the evaluation index calculation unit 22 has a distance in the X-axis plus direction from the virtual plane out of the point group on the evaluation target surface 610 represented by the shape data 31. The maximum first end point and the second end point having the maximum distance in the X-axis minus direction from the virtual plane are specified.

  Then, the evaluation index calculation unit 22 has a first distance that is an absolute value of the distance between the virtual plane and the first end point, and a second value that is an absolute value of the distance between the virtual plane and the second end point. Each distance is calculated. Then, the evaluation index calculation unit 22 uses a value obtained by adding the first distance and the second distance as a calculation result of the flatness value.

  Next, as the projection position specifying step, the projection position recognition unit 23 detects the pattern corresponding to the shape of the evaluation result display field 612 from the image represented by the image data 32, thereby the position of the evaluation result display field 612. Is identified (step S5).

  5 illustrates the case where the projection position specifying step (step S5) is performed after the evaluation index calculating step (step S4). However, the projection position specifying step (step S5) is performed in the evaluation index calculating step (step S5). It can be performed in parallel with S4).

  Next, as the evaluation result projection step, the projection apparatus control unit 24 is calculated by the evaluation index calculation unit 22 at the position of the evaluation result display field 612 specified by the projection position recognition unit 23 with respect to the projection apparatus 400. Control to project the value of the evaluation index 42b is performed (step S6).

  FIG. 6 illustrates the evaluation object 600 in a state where the value of the evaluation index 42b is projected at the position of the evaluation result display field 612. A numerical value of 0.05 is projected on the evaluation result display field 612 as the value of the evaluation index 42b. This numerical value indicates that the flatness value as the evaluation index 42b calculated in the evaluation index calculation step (step S4) is 0.05 mm.

  As described above, according to the present embodiment, the evaluation index 42b is specified by the evaluation viewpoint specifying mark 611 attached to the evaluation object 600. The evaluation viewpoint identification mark 611 is attached to the evaluation object 600 in advance when the evaluation object 600 is manufactured.

  For this reason, in the stage which test | inspects the evaluation target object 600, the effort for a user to designate the evaluation index 42b can be saved. Therefore, even if it is desired to flexibly change the evaluation viewpoint of the evaluation object 600, the evaluation object 600 can be evaluated easily.

  In addition, since the viewpoint of evaluation is designated in advance by attaching the evaluation viewpoint identification mark 611 to the evaluation object 600, in the stage of evaluating the evaluation object 600, the viewpoint of evaluating the evaluation object 600 is wrong. The occurrence of a typical mistake can be prevented.

  In addition, since the evaluation viewpoint identification mark 611 is marked on the evaluation target surface 610 of the evaluation object 600, the user causes the three-dimensional scanner 200 to measure which surface of the evaluation object 600 and the imaging apparatus 300. It can be easily recognized whether or not the image should be picked up. For this reason, in the stage which evaluates the evaluation target object 600, it is hard to generate | occur | produce the artificial mistake which makes the surface which evaluates the evaluation target object 600 wrong.

  In addition, the value of the evaluation index 42 b calculated by the evaluation index calculation unit 22 is optically projected onto the surface of the evaluation object 600 by the projection device 400. For this reason, compared with the case where the evaluation result is printed out on another medium, the value of the evaluation index 42b calculated by the evaluation index calculation unit 22 can be easily compared with the evaluation object 600.

  Further, since the value of the evaluation index 42b is not printed in the evaluation result display field 612 with ink, the value of the evaluation index 42b is not left on the surface of the evaluation object 600 after the user confirms the evaluation result. Can be provided.

[Embodiment 2]
In the first embodiment, the evaluation index 42b included in the evaluation index specifying table 42 illustrated in FIG. 3 is exemplified as one that does not use a datum. The shape evaluation apparatus 500 may evaluate the shape of the evaluation object 600 using a datum. Specific examples thereof will be described below.

  As shown in FIG. 7, in the present embodiment, a datum is used for the evaluation index 42 b defined in the evaluation index specifying table 42, specifically, parallelism, squareness, coaxiality, inclination, and symmetry. Degrees etc. are included. These evaluation indices 42b are defined according to JIS B0621.

  That is, the degree of parallelism refers to a datum straight line or a geometric straight line parallel to the datum plane or the magnitude of the deviation of the linear or planar feature that should be parallel from the geometric plane. Squareness refers to a datum straight line or a geometrical straight line perpendicular to the datum plane or the magnitude of the deviation of a straight or planar feature that should be perpendicular to the geometrical plane. The concentricity means the magnitude of deviation from the datum axis line of the axis line that should be collinear with the datum axis line. Inclination is the amount of deviation of a linear or planar feature that should have a theoretically accurate angle from a geometrical line or geometrical plane that has a theoretically accurate angle with respect to a datum straight line or datum plane. Say it. The degree of symmetry refers to the magnitude of the deviation from the symmetrical position of the features that should be symmetric with respect to the datum axis line or the datum center plane.

  As shown in FIG. 8, a datum mark 621 as a reference part designating pattern is attached to a reference surface 620 as a reference part serving as a reference when evaluating the shape of the evaluation target surface 610 of the evaluation object 600. Yes. The datum mark 621 indicates that the surface to which the datum mark 621 is attached is the reference surface 620.

  In addition to the evaluation viewpoint identification mark 611 and the evaluation result display field 612, the evaluation index 42b identified by the evaluation viewpoint identification mark 611 uses a datum on the evaluation target surface 610 of the evaluation object 600. A datum usage display mark 613 is added as a reference site presence display pattern to be expressed.

  When the user causes the three-dimensional scanner 200 to measure the shape of the evaluation target surface 610 and causes the imaging device 300 to image the evaluation target surface 610, the user visually recognizes the datum use display mark 613, thereby It can be noticed that the reference surface 620 exists at any part other than the evaluated surface 610.

  Then, the user specifies the reference plane 620 based on the presence of the datum mark 621, causes the three-dimensional scanner 200 to measure the shape of the reference plane 620, and the imaging apparatus 300 has at least the datum mark 621 on the reference plane 620. Also let me image.

  As shown in FIG. 9, in this embodiment, the CPU 20 determines whether or not the datum mark 621 and the datum usage display mark 613 are marked on the surface of the evaluation object 600 measured by the three-dimensional scanner 200. It has the function of the datum mark recognizing unit 25 as a reference part presence / absence judging means for judging.

  Specifically, the datum mark recognition unit 25 determines whether there is a pattern corresponding to the datum mark 621 and the datum usage display mark 613 in the image represented by the image data 32 generated by the imaging device 300. Match by matching.

  Then, when the datum mark recognition unit 25 detects the datum usage display mark 613 along with the evaluation viewpoint identification mark 611 and the evaluation result display field 612 in the image represented by the image data 32, the datum mark recognition unit 25 evaluates from the three-dimensional scanner 200. The evaluation index calculation unit 22 is instructed that the shape data currently given to the index calculation unit 22 is the evaluation target surface 610.

  When the datum mark recognition unit 25 independently detects the datum mark 621 in the image represented by the image data 32, the shape data currently given from the three-dimensional scanner 200 to the evaluation index calculation unit 22 is: The evaluation index calculation unit 22 is instructed to be reference part data representing a reference surface 620 that serves as a reference for evaluating the evaluation target surface 610.

  In the process of calculating the evaluation index 42b, the evaluation index calculation unit 22 calculates reference part data representing the shape of the reference surface 620 determined by the datum mark recognition unit 25 as being marked with the datum mark 621 in the process of calculating the evaluation index 42b. And performing an operation for specifying a virtual reference plane or a virtual reference line. Then, the evaluation index calculation unit 22 calculates the evaluation index 42b using the data indicating the position of the virtual reference plane or the virtual reference line and the shape data.

  As a specific example, when calculating the coaxiality as the evaluation index 42b, the evaluation index calculation unit 22 uses the reference part data representing the shape of the reference surface 620, and uses each of the reference surfaces 620 as the virtual reference surface described above. The virtual reference cylindrical surface that minimizes the sum of the distances to the points is specified by the least square method. Then, a datum axis corresponding to the central axis of the virtual reference cylindrical surface is specified.

  In addition, the evaluation index calculation unit 22 uses a shape data representing the shape of the evaluation target surface 610 to calculate a virtual cylindrical surface that minimizes the sum of the distances to each point on the evaluation target surface 610 using the least square method. Specified. Then, an evaluation target axis corresponding to the central axis of the virtual cylindrical surface is specified.

  Then, the evaluation index calculation unit 22 calculates the distance between the datum axis described above and the evaluation target axis described above. The calculation result is the coaxiality value.

  FIG. 8 shows the evaluation object 600 on which an evaluation result display field 612 is projected to indicate that the value of the coaxiality is 0.03 mm as a specific example of the evaluation index 42b. As shown in FIG. 8, the display mode of the value of the evaluation index 42b is in accordance with the provisions of JISB0021. Specifically, the evaluation result display field 612 is marked with a symbol of φ. For this reason, it is clear for the user that the numerical value of 0.03 projected on the evaluation result display field 612 represents the coaxiality.

  As described above, according to the present embodiment, the datum mark 621 identifies the reference part data representing the reference plane 620 in the shape data. For this reason, even if the evaluation index 42b uses a datum, it is possible to save the user from having to specify the reference plane 620 in the stage of evaluating the evaluation object 600.

[Embodiment 3]
In the first and second embodiments, the projection device 400 projects the value of the evaluation index 42b. The projection apparatus 400 may project the evaluation result of the evaluation object 600 specified from the value of the evaluation index 42b, not the value of the evaluation index 42b itself. Specific examples will be described below.

  As shown in FIG. 10, in the present embodiment, in the evaluation index specifying table 42, an allowable value 42c of the evaluation index 42b is associated with each evaluation index 42b. The allowable value 42c means that the calculation result of the evaluation index 42b should be within the value.

  As illustrated in FIG. 11, the CPU 20 includes an output unit 530 serving as an output unit that outputs an evaluation result specified from the value of the evaluation index 42 b calculated by the evaluation index calculation unit 22, the projection device control unit 24, and the projection device. It has the function of the pass / fail judgment part 26 comprised with 400. FIG.

  The pass / fail determination unit 26 determines whether or not the value of the evaluation index 42b calculated by the evaluation index calculation unit 22 is less than or equal to the allowable value 42c determined in the evaluation index specifying table 42 for the evaluation index 42b.

  Then, when the value of the evaluation index 42b is equal to or less than the allowable value 42c, the pass / fail determination unit 26 instructs the projection device control unit 24 to pass. On the other hand, when the value of the evaluation index 42b exceeds the allowable value 42c, the pass / fail determination unit 26 instructs the projection device control unit 24 to reject the evaluation.

  When the projection device control unit 24 is instructed from the pass / fail determination unit 26 to pass, the projection device 400 projects that the projection device 400 has passed, and the pass / fail determination unit 26 is instructed to reject. Causes the projection apparatus 400 to project a failure. Thereby, the pass / fail determination result as the evaluation result is output by projection.

  As shown in FIG. 12, the pass / fail determination result is projected onto the evaluation result display field 612. FIG. 12 exemplifies a case where the result of success is projected on the evaluation result display field 612. This means that the flatness value, which is the evaluation index 42b represented by the evaluation viewpoint identification mark 611 shown in FIG. 12, is 0.08 mm or less which is the allowable value 42c defined in the evaluation index identification table 42. Yes.

  As described above, according to the present embodiment, the pass / fail determination result as the evaluation result specified from the value of the evaluation index 42b is projected on the evaluation result display field 612, not the value of the evaluation index 42b itself. . For this reason, even a user who does not have specialized knowledge regarding geometric tolerance can easily grasp the evaluation result of the evaluation object 600.

  The embodiment of the present invention has been described above. The present invention is not limited to this, and modifications described below are possible.

  In each said embodiment, although the evaluation viewpoint specific mark 611, the evaluation result display column 612, the datum use display mark 613, and the datum mark 621 were marked with the ink, these marking methods are not specifically limited. The evaluation viewpoint identification mark 611, the evaluation result display field 612, the datum usage display mark 613, and the datum mark 621 are only required to have a form visually recognizable by a person. The evaluation viewpoint identification mark 611, the evaluation result display field 612, the datum usage display mark 613, and the datum mark 621 may be engraved on the evaluation object 600.

  In each of the above embodiments, the evaluation viewpoint specifying mark 611 representing the mark in accordance with the provisions of JISB0021 is used as the evaluation viewpoint specifying pattern. However, the evaluation viewpoint specifying pattern allows the shape evaluation apparatus 500 to specify the evaluation viewpoint. There is no limitation, and the form is not particularly limited to the mark. In addition, the datum mark 621 conforming to the provisions of JISB0021 is used as the reference part designating pattern. However, if the shape evaluation apparatus 500 can identify the reference part, the form is not limited to the mark. I can't. A one-dimensional or two-dimensional barcode may be used as the evaluation viewpoint specifying pattern and the reference part specifying pattern. In this specification, the “pattern” is a concept including not only a mark but also a geometric pattern, a character, a figure, a symbol, a sign, and a color.

  In the above embodiment, the three-dimensional scanner 200 that measures the distance to the reflection point of the laser beam is used as the measurement device that generates the shape data representing the shape of the evaluation object 600. However, triangulation using a plurality of cameras. You may use the measuring apparatus which performs the stereo image measurement which measures a shape by the principle of. The measurement apparatus may include a configuration that can adjust the amount of light applied to the evaluation object 600 when the surface of the evaluation object 600 is black and sufficient reflected light cannot be acquired. The measuring device is preferably a handy type, but may be a stationary type.

  By installing the shape evaluation program 41 shown in FIG. 2 in a computer, the computer can function as the arithmetic and control unit 100. The shape evaluation program 41 can be distributed through a communication line, or can be stored and distributed in a computer-readable recording medium such as an optical disk, a magnetic disk, or a flash memory.

  DESCRIPTION OF SYMBOLS 10 ... Interface part, 20 ... CPU, 21 ... Evaluation viewpoint specific mark recognition part, 22 ... Evaluation index calculation part (evaluation index calculation means), 23 ... Projection position recognition part, 24 ... Projection apparatus control part, 25 ... Datum mark recognition Part (reference part presence / absence judging means), 26 ... pass / fail judgment part, 30 ... main storage part, 31 ... shape data, 32 ... image data, 40 ... auxiliary storage part, 41 ... shape evaluation program, 42 ... evaluation index specification table, 42a ... Template mark data (template pattern data), 42b ... Evaluation index, 42c ... Allowable value, 100 ... Calculation control device, 200 ... Three-dimensional scanner (measuring device), 300 ... Imaging device, 400 ... Projection device, 500 ... Shape Evaluation device, 510... Evaluation index specifying part (evaluation index specifying means), 520, 530... Output part (output means), 600. DESCRIPTION OF SYMBOLS 0 ... Evaluated surface, 611 ... Evaluation viewpoint specific mark (evaluation viewpoint specific pattern), 612 ... Evaluation result display column, 613 ... Datum use display mark, 620 ... Reference plane (reference part), 621 ... Datum mark (reference part designation) pattern).

Claims (6)

An evaluation index for reading the evaluation viewpoint specific pattern from an evaluation target object marked with an evaluation viewpoint specific pattern representing an evaluation viewpoint regarding the shape, and evaluating the shape of the evaluation target object from the viewpoint of the evaluation viewpoint specific pattern An evaluation index identifying means for identifying
The shape data is obtained from a measuring device that generates shape data representing the shape of the evaluation object by measuring the shape of the evaluation object, and is specified by the evaluation index specifying means using the shape data An evaluation index calculating means for calculating a value of the evaluation index;
An output means for outputting an evaluation result of the shape of the evaluation object specified from the value of the evaluation index calculated by the evaluation index calculating means or the value of the evaluation index;
A shape evaluation apparatus. The evaluation index specifying means includes
Using the predetermined correspondence between each of a plurality of types of the evaluation index and template pattern data representing a pattern for identifying the evaluation index, the evaluation viewpoint identification pattern attached to the evaluation object is any of By identifying whether the template pattern data represents the pattern, the evaluation index associated with the template pattern data representing the corresponding pattern is identified,
The plurality of types of evaluation indices associated with the template pattern data in the correspondence relationship include straightness, flatness, roundness, cylindricity, parallelism, perpendicularity, and coaxiality as defined in JIS B0621. , At least one selected from slope, and symmetry,
The shape evaluation apparatus according to claim 1. The output means is
By optically projecting the evaluation index value calculated by the evaluation index calculation means or the evaluation result of the shape of the evaluation object specified from the evaluation index value onto the surface of the evaluation object Output projection device,
The shape evaluation apparatus according to claim 1, comprising: The shape evaluation apparatus is
Criteria for determining whether or not a reference part designating pattern representing a reference part serving as a reference for calculating the evaluation index is marked on the surface of the evaluation object measured by the measuring device Part presence / absence judging means,
Further comprising
The evaluation index calculation means is
In the process of calculating the evaluation index, using the reference part data representing the shape of the surface determined by the reference part presence / absence determining means that the reference part designation pattern is marked, Perform an operation to specify a reference plane or virtual reference line,
The shape evaluation apparatus according to any one of claims 1 to 3. A marking step for pre-marking an evaluation viewpoint specific pattern that represents a viewpoint of evaluation related to the shape of the evaluation object, in a portion where the shape of the evaluation object is to be evaluated,
An evaluation index specification that reads the evaluation viewpoint specification pattern from the evaluation target object marked with the evaluation viewpoint specification pattern and specifies an evaluation index for evaluating the shape of the evaluation target object from the viewpoint of the evaluation viewpoint specification pattern Process,
Shape data representing the shape of the evaluation object is generated by measuring the shape of at least the portion of the evaluation object marked with the evaluation viewpoint specific pattern, and the evaluation index is calculated using the shape data An evaluation index calculation step to perform,
A shape evaluation method including: On the computer,
Image data obtained by imaging the evaluation viewpoint specific pattern is acquired from an imaging device that images the evaluation viewpoint specific pattern of the evaluation object on which the evaluation viewpoint specific pattern representing the evaluation point regarding the shape is marked Image data acquisition function,
Using the image data acquired by the image data acquisition function, an evaluation index specifying function for specifying an evaluation index for evaluating the shape of the evaluation object from the viewpoint of the evaluation viewpoint specifying pattern;
The shape data is acquired from a measuring device that generates shape data representing the shape of the evaluation object by measuring the shape of the evaluation object, and the shape data is used to specify the shape data by the evaluation index specifying function. An evaluation index calculation function for calculating the evaluation index;
A shape evaluation program that realizes