JP2012037257A - Measurement setting data creation device, measurement setting data creation method, and program for measurement setting data creation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a measurement setting data creation device that easily creates measurement setting data for measuring dimensions of a work.SOLUTION: The measurement setting data creation device comprises: design data acquisition means for acquiring design data including position information on shape lines, position information on dimension lines, and design value information consisting of design values and tolerances related to the dimension lines; measurement object specification means for specifying a measurement object place and a measurement kind for a master image including the work; edge extraction means for extracting an edge from the master image with respect to the specified measurement object place; dimension value calculation means for calculating a dimension value at the measurement object place based upon the extracted edge; design value information extraction means for extracting design value information consisting of a design value close to the calculated dimension value from the design data; and measurement setting data creation means for creating the measurement setting data including the measurement object place information consisting of the specified measurement object place and measurement kind and the design value information related to the measurement object place.

Description

  The present invention relates to a measurement setting data creation device, a measurement setting data creation method, and a program for a measurement setting data creation device. More specifically, the present invention relates to a measurement of a workpiece dimension by detecting an edge in a workpiece image obtained by photographing a workpiece. The present invention relates to a measurement setting data creation device that creates measurement setting data for measurement.

  Generally, a dimension measuring apparatus is an apparatus that measures a dimension of a workpiece by acquiring a workpiece image obtained by photographing the workpiece and detecting an edge in the workpiece image, and is sometimes referred to as an image measuring device (for example, a patent measurement device). References 1 to 3). Usually, the workpiece is placed on a movable stage movable in the X, Y and Z axis directions. The workpiece image is focused by moving the movable stage in the Z-axis direction, and the position of the workpiece in the field of view is adjusted by moving in the X- and Y-axis directions.

  The workpiece image is a very accurate similar shape to the workpiece regardless of the position of the movable stage in the Z-axis direction, so the actual dimensions on the workpiece are detected by determining the distance and angle on the image. can do. In measuring the dimensions of a workpiece, edge extraction of the workpiece image is performed. Edge extraction is performed by analyzing the brightness change of the workpiece image, detecting edge points, and fitting a geometric figure such as a straight line or arc to the detected edge points to indicate the boundary between the workpiece and the background Edge is required. The dimensions of the workpiece are measured as the distance and angle between the edges determined in this way, and the center position and diameter of the circular edge. In addition, a quality determination is performed by comparing a difference (error) between the measured dimension value and the design value with a tolerance.

  The above-described workpiece dimension measurement is performed based on measurement setting data created in advance. The measurement setting data is composed of feature amount information for detecting a workpiece from a workpiece image, measurement target location information indicating a measurement target location and a measurement type, and design value information indicating a design value and tolerance for pass / fail judgment. The In a conventional measurement setting data creation device, an edge detection region for extracting an edge is set by a user specifying a measurement target location and a measurement type for a master image obtained by photographing a reference object. Then, an edge is extracted from the master image in the edge detection area, and the dimension value is measured. Then, based on the dimension value obtained from the master image, the user inputs design values and tolerances, thereby obtaining measurement setting data. For this reason, when there are many locations to be measured, it is necessary to input design values and tolerances for each of these measurement target locations, and there is a problem that the creation of measurement setting data is extremely complicated.

JP 2009-300124 A JP 2009-300125 A JP 2010-19667 A

  The present invention has been made in view of the above circumstances, and a measurement setting data creation device, a measurement setting data creation method, and a program for a measurement setting data creation device that can simplify the creation of measurement setting data. The purpose is to provide. In particular, an object of the present invention is to provide a measurement setting data creation device that can easily create measurement setting data for measuring the dimensions of a workpiece.

  The measurement setting data creation device according to the first aspect of the present invention creates measurement setting data for measuring the dimensions of the workpiece by acquiring a workpiece image obtained by photographing the workpiece and detecting an edge in the workpiece image. A measurement setting data creation device, which includes design data including position information of a shape line indicating the contour shape of the workpiece, position information of a dimension line, and design value information including design values and tolerances associated with the dimension line Design data acquisition means for acquiring the measurement object location and the measurement target location designation means for specifying the measurement target location and measurement type for the master image including the workpiece, and the edge from the master image for the specified measurement target location. An edge extracting means for extracting, a dimension value calculating means for calculating a dimension value of the measurement target location based on the extracted edge, and a calculated Design value information extracting means for extracting design value information consisting of design values close to the legal value from the design data, measurement target location information consisting of the specified measurement target location and measurement type, and the measurement target location Measurement setting data generation means for generating measurement setting data including the associated design value information.

  According to such a configuration, an edge is extracted from a predetermined master image including a workpiece to calculate a dimension value of a measurement target portion, and design value information including a design value close to the calculated dimension value is extracted from the design data. Since measurement setting data is generated, it is possible to save the trouble of inputting design values and tolerances for each measurement target location. Therefore, every time the workpiece to be measured is changed, it is not necessary to input a design value or tolerance, so that measurement setting data for measuring the workpiece dimensions can be easily created.

  The measurement setting data creation device according to the second aspect of the present invention is based on the specified measurement type when the design value information extracting means extracts two or more design value information from the design data in addition to the above configuration. The design value information is narrowed down. According to such a configuration, even when a plurality of design value information whose design values are close to the dimension values obtained from the master image are extracted, the design values and tolerances can be appropriately set as measurement setting data. Can do.

  In addition to the above-described configuration, the design value data extraction unit according to the third aspect of the present invention is configured so that the design value information extraction unit is configured to store the design value information based on the distance between the designated measurement target location and the end point of the dimension line. It is configured to narrow down. According to such a configuration, even when the design value is close to the dimension value obtained from the master image and a plurality of design value information of the same measurement type is extracted, the design value and tolerance are used as measurement setting data. It can be set appropriately.

  In addition to the above-described configuration, the measurement setting data creation device according to the fourth aspect of the present invention is configured such that the design value information extraction unit extracts design value information including a design value closest to the calculated dimension value.

  In addition to the above configuration, the measurement setting data creation device according to the fifth aspect of the present invention includes design value candidate display means for displaying two or more design value information extracted from the design data as design value candidates, and the design value candidates. Design value candidate designating means for designating one of the above, and the measurement setting data generating means is configured to generate the measurement setting data including the designated design value candidate as the design value information . According to such a configuration, when a plurality of design value information whose design values are close to the dimension values obtained from the master image are extracted, it is possible to allow the user to select appropriate design value information.

  According to a sixth aspect of the present invention, there is provided a measurement setting data creating method for obtaining measurement setting data for measuring a dimension of the workpiece by acquiring a workpiece image obtained by photographing the workpiece and detecting an edge in the workpiece image. A method for creating measurement setting data, including design data including position information of a shape line indicating the contour shape of the workpiece, position information of a dimension line, and design value information including design values and tolerances associated with the dimension line The design data acquisition step for acquiring the measurement object, the measurement target location specifying step for specifying the measurement target location and the measurement type for the master image including the workpiece, and the edge from the master image for the specified measurement target location. An edge extracting step to extract, and a dimension value calculating step for calculating a dimension value of the measurement target location based on the extracted edge. Design value information extraction step for extracting design value information consisting of design values close to the calculated dimension value from the design data, measurement target location information consisting of the specified measurement target location and the measurement type, and A measurement setting data generation step for generating measurement setting data including the design value information associated with the measurement target portion.

  A program for a measurement setting data creation device according to a seventh aspect of the present invention is a measurement setting data for measuring a workpiece dimension by acquiring a workpiece image obtained by photographing a workpiece and detecting an edge in the workpiece image. Is a program for a measurement setting data creation device, which includes position information of a shape line indicating the contour shape of the workpiece, position information of a dimension line, and design values and tolerances associated with the dimension line. Design data acquisition procedure for acquiring design data including value information, measurement target location specifying procedure for specifying the measurement target location and measurement type for the master image including the workpiece, and the specified measurement target location, Based on an edge extraction procedure for extracting an edge from the master image and the extracted edge, the dimension value of the measurement target portion is calculated. A procedure for calculating a legal value, a design value information extraction procedure for extracting design value information consisting of a design value close to the calculated dimension value from the design data, and a measurement target location consisting of the specified measurement target location and measurement type. And a measurement setting data generation procedure for generating measurement setting data including the design value information associated with the information and the measurement target location.

  In the measurement setting data creation device, the measurement setting data creation method, and the program for the measurement setting data creation device according to the present invention, the edge is extracted from the predetermined master image including the workpiece, the dimension value of the measurement target portion is calculated, and the calculation is performed. Since design value information consisting of design values close to the dimension value is extracted from the design data and measurement setting data is generated, it is possible to save the trouble of inputting design values and tolerances for each measurement target location. Therefore, every time the workpiece to be measured is changed, it is not necessary to input design values and tolerances. Therefore, measurement setting data for measuring workpiece dimensions can be easily created. Creation work can be simplified.

It is the perspective view which showed the example of 1 structure of the measurement setting data creation apparatus 100 by embodiment of this invention. FIG. 2 is an explanatory diagram schematically showing a configuration example in the measurement unit 10 in the measurement setting data creation device 100 of FIG. 1, and shows a state of a cut surface by a vertical surface of the measurement unit 10. 3 is a flowchart showing an example of the operation of the measurement setting data creation device 100 of FIG. It is the flowchart which showed the production | generation operation | movement of the measurement setting data using the conventional measurement setting data creation apparatus. 3 is a flowchart showing an example of an operation at the time of dimension measurement in the measurement setting data creation device 100 of FIG. 1. 2 is a flowchart showing an example of an operation for creating measurement setting data using the measurement setting data creation device 100 of FIG. 1. FIG. 2 is a diagram illustrating an example of an operation at the time of creation of measurement setting data in the measurement setting data creation apparatus 100 of FIG. It is the figure which showed an example of the operation | movement at the time of preparation of the measurement setting data in the measurement setting data preparation apparatus 100 of FIG. 1, and an example of CAD data containing the shape lines 1 and 2 and the dimension lines 3-5 is shown. It is the figure which showed an example of the operation | movement at the time of creation of the measurement setting data in the measurement setting data creation apparatus 100 of FIG. 1, and the example of a display of the some design value candidate extracted from CAD data is shown. FIG. 2 is a block diagram illustrating a configuration example of a control unit 20 in the measurement setting data creation device 100 of FIG. 1, and illustrates an example of a functional configuration in the control unit 20.

<Measurement setting data creation device>
FIG. 1 is a perspective view showing a configuration example of a measurement setting data creation device 100 according to an embodiment of the present invention. The measurement setting data creation device 100 photographs a plurality of workpieces arranged in the detection area 13 on the movable stage 12 at different imaging magnifications, analyzes the captured images, and automatically measures the dimensions of each workpiece. A measuring unit 10, a control unit 20, a keyboard 31 and a mouse 32. The workpiece is a measurement object whose shape and dimensions are measured.

  The measurement unit 10 is an optical system unit that irradiates a workpiece with detection light and receives the transmitted light or reflected light to generate a photographed image. The display unit 11, the movable stage 12, the XY position adjustment knob 14a, and the Z position adjustment. A knob 14b, a power switch 15 and a measurement start switch 16 are provided.

  The display 11 is a display device that displays captured images and measurement results on the display screen 11a. The movable stage 12 is a mounting table for mounting a workpiece to be measured, and is provided with a detection area 13 that transmits detection light. The detection area 13 is a circular area made of transparent glass. The movable stage 12 can be moved in the Z-axis direction parallel to the optical axis of the detection light and the XY axial directions perpendicular to the optical axis.

  The XY position adjustment knob 14a is an operation unit for moving the movable stage 12 in the X-axis direction and the Y-axis direction. The Z position adjustment knob 14b is an operation unit for moving the movable stage 12 in the Z-axis direction. The power switch 15 is an operation unit for turning on the power of the measurement unit 10 and the control unit 20, and the measurement start switch 16 is an operation unit for starting measurement on the workpiece.

  The control unit 20 is a controller that controls photographing and screen display by the measurement unit 10 and analyzes the photographed image to measure the dimensions of the workpiece, and is connected to a keyboard 31 and a mouse 32. After the power is turned on, if a plurality of works are appropriately arranged in the detection area 13 and the measurement start switch 16 is operated, the dimensions of each work are automatically measured.

<Measurement unit>
FIG. 2 is an explanatory diagram schematically showing a configuration example in the measurement unit 10 in the measurement setting data creation device 100 of FIG. 1, and shows a state of a cut surface when the measurement unit 10 is cut along a vertical plane. ing. The measurement unit 10 includes a housing 40 having a Z driving unit 41, an XY driving unit 42, imaging elements 43 and 44, a transmission illumination unit 50, a ring illumination unit 60, a coaxial incident illumination light source 71, and a light receiving lens unit 80. It is configured.

  The Z drive unit 41 is a Z position adjusting unit that moves the movable stage 12 in the Z axis direction based on a drive signal from the control unit 20 to adjust the position of the workpiece in the Z axis direction. The XY drive unit 42 is an XY position adjusting unit that adjusts the position of the workpiece in the XY plane by moving the movable stage 12 in the X-axis direction and the Y-axis direction based on the XY drive signal from the control unit 20.

  The transmitted illumination unit 50 is an illumination device for irradiating the work placed on the movable stage 12 with detection light from below, and includes a transmitted illumination light source 51, a mirror 52, and an optical lens 53. The detection light emitted from the transmission illumination light source 51 is reflected by the mirror 52 and emitted through the optical lens 52. The detection light passes through the movable stage 12, a part of the transmitted light is blocked by the work, and the other part enters the light receiving lens unit 80.

  The ring illumination unit 60 is an illumination device for irradiating the workpiece on the movable stage 12 with detection light from above, and includes a ring-shaped light source surrounding the light receiving lens unit 80. The coaxial epi-illumination light source 71 is a light source for irradiating the workpiece on the movable stage 12 with detection light from above, and the optical axis of the irradiation light to the workpiece and the optical axis of the reflected light from the workpiece are coaxial. Thus, the half mirror 72 is arranged. As a method for illuminating the workpiece, one of transmission illumination, ring illumination, and coaxial epi-illumination can be selectively switched.

  The light receiving lens unit 80 is an optical system including the light receiving lenses 81, 84, 86, the half mirror 82, and the diaphragm plates 83 and 85, and receives the transmitted light from the transmitted illumination unit 50 and the reflected light of the detection light by the work. Then, an image is formed on the image sensors 43 and 44. The light receiving lens 81 is an optical lens disposed on the movable stage 12 side, and is disposed to face the upper surface of the movable stage 12. The light receiving lens 84 is an optical lens disposed on the image sensor 43 side, and is disposed to face the image sensor 43. The light receiving lens 86 is an optical lens disposed on the image sensor 44 side, and is disposed to face the image sensor 44.

  The diaphragm plate 83 and the light receiving lens 84 are low-magnification-side image forming portions having a low photographing magnification, and are arranged such that their central axes coincide with the optical lens 53 and the light receiving lens 81. On the other hand, the diaphragm plate 85 and the light receiving lens 86 are high-magnification side imaging units with high photographing magnification, and detection light from the work is incident through the half mirror 82. The light receiving lenses 81, 84, and 86 have a property that does not change the size of the image even if the position of the workpiece in the optical axis direction (Z-axis direction) changes, and is called a telecentric lens.

  The image sensor 43 is a low-magnification image sensor that captures a low-magnification visual field formed by the light-receiving lens unit 80 and generates a low-magnification image. The image sensor 44 is a high-magnification image sensor that captures a high-magnification field-of-view workpiece formed by the light-receiving lens unit 80 at a high magnification and generates a high-magnification image. The high magnification field is a narrower field than the low magnification field, and is formed in the low magnification field.

  The imaging elements 43 and 44 are each composed of a semiconductor element such as a CCD (Charge Coupled Device) or a CMOS (Complementary Metal Oxide Semiconductor).

  In this measurement setting data creation device 100, as long as the workpiece is placed within the detection area 13 of the movable stage 12, the workpiece can be captured with a low magnification field of view. Further, the work placed in the low magnification field of view is guided into the high magnification field of view by photographing the low magnification image and moving the movable stage 12 in the XY plane, and is photographed at a high magnification. In this measurement setting data creation device 100, the low magnification field and the high magnification field are substantially concentric, and a low magnification image and a high magnification image can be acquired simultaneously.

<Operation of measurement setting data creation device>
Steps S101 to S103 in FIG. 3 are flowcharts showing an example of the operation of the measurement setting data creation device 100 in FIG. In the measurement setting data creation device 100, the operation consists of three processes, ie, creation of measurement setting data (step S101), execution of measurement (step S102), and display of measurement results (step S103).

  The measurement setting data is information necessary for execution of measurement, and includes feature amount information indicating feature amounts, information indicating measurement locations and measurement types, information indicating design values and tolerances for each measurement location, and the like. The feature amount information is positioning information for analyzing the workpiece image and detecting the position and posture of the workpiece, and is set based on master data obtained by photographing a reference object such as a master piece, or CAD It is set based on design data created using (Computer Aided Design). If the feature amount information, the information indicating the measurement location and the measurement type are set based on the high-magnification image, identification information indicating that fact is stored as measurement setting data.

  The measurement setting data is created in the control unit 20. The measurement process is executed based on such measurement setting data. And the display process of a measurement result is performed by displaying the dimension value etc. which were obtained by measurement on the display 11. FIG.

  Steps S201 to S204 in FIG. 4 are flowcharts showing measurement setting data generation operations using a conventional measurement setting data generation apparatus. The conventional measurement setting data creation process includes the following four processing procedures. First, master data is input (step S201). In inputting master data, master data used for setting feature values and comparing contours is acquired. The master data includes a photographed image obtained by photographing a predetermined reference object such as a master piece, or CAD data or a CAD image created by CAD. Here, an example in which a master image obtained by photographing a master piece is used as master data will be described.

  Next, feature values are set (step S202). The feature amount setting step is a step of extracting a feature amount from the entire master image using the master image or extracting a feature amount from a range designated as a location having a particular feature by the user. As the feature quantity, for example, various kinds of features can be used as long as they can detect the position and posture of the workpiece, which will be described later, such as image contrast, edge strength, and direction.

  Next, the measurement target location and the measurement type are designated (step S203). The measurement target location and the measurement type are specified by specifying an edge detection region and a measurement type for each desired measurement target location on the master image displayed on the display 11.

  The edge detection area is an area for analyzing the luminance change of the captured image in the area and extracting an edge. The designation of the measurement type designates a measurement method for what is measured. For example, what is to be measured and what method is to be measured, such as the dimension between the line segments, the angle, and the diameter of the circle, are specified. When the specification of the measurement target location and the measurement type is completed, the measurement is executed using the master image. That is, edge extraction is performed on the master image, and the dimension value for each measurement target location is measured. The measurement result of the dimension value is displayed on the master image, for example.

  Next, design values and tolerances are set (step S204). In the setting of the design value and the tolerance, the displayed dimension value for each measurement target portion is changed as necessary and set as a design value. In addition, a tolerance is set in association with the design value. The measurement setting data created in this way is written in a storage area in the control unit 20.

<Dimension measurement>
Steps S301 to S306 in FIG. 5 are flowcharts showing an example of the operation at the time of dimension measurement in the measurement setting data creation device 100 in FIG. The dimension measurement consists of the following six processing procedures. First, the work placed on the movable stage 12 is photographed to obtain a work image, and the work image is analyzed based on the feature amount information of the measurement setting data, thereby positioning the work (step S301). The positioning of the workpiece is performed by detecting the position and orientation of the workpiece in the workpiece image using a method such as pattern matching based on the feature amount information.

  Next, based on the detection result of the position and orientation and the measurement setting data, the measurement location is specified (step S302), and the edge extraction of the work image is performed (step S303). The dimension measurement is performed by calculating a distance and an angle based on the extracted edge position for each measurement location and the measurement type information of the measurement setting data (step S304).

  Next, an error is obtained from the difference between the measured dimension value and the design value of the measurement setting data, and the error is compared with the corresponding tolerance (step S305), thereby determining whether the measurement location is good or bad. (Step S306).

  As described above, in order to generate measurement setting data, the user must not only specify the measurement target location and measurement type to be measured, but also set design values and tolerances for each measurement target location one by one. It takes a lot of work. In addition, when the dimension measuring apparatus is used at the manufacturing site, the user often has CAD data that is data when a workpiece to be measured is designed. In this embodiment, design values and tolerances are extracted from CAD data to generate measurement setting data, so that it is possible to save the user's effort to generate measurement setting data. Hereinafter, a configuration for generating measurement setting data from CAD data as design data will be described with reference to FIGS.

<Create measurement setting data>
Steps S401 to S413 in FIG. 6 are flowcharts showing an example of the measurement setting data creation operation using the measurement setting data creation apparatus 100 in FIG. In the measurement setting data creation device 100, design data created in an external device such as a PC is acquired from the external device, and measurement setting data is created using the acquired design data.

  The design data is created using CAD or the like, and the position information of the shape line indicating the outline shape of the workpiece, the position information of the dimension line, the design value information including the design value and tolerance associated with the dimension line, and the dimension Dimension type information indicating the type is included.

  First, the measurement setting data creation apparatus 100 acquires design data, then acquires a master image and displays the master image on the display 11 (steps S401 and S402). If a measurement target location and a measurement type are designated by a predetermined operation by the user on the master image displayed on the display 11, dimension measurement is performed on the designated measurement target location, and a dimension value is calculated. (Steps S403 and S404). Specifically, an edge is extracted from the master image for the designated measurement target portion, and the dimension value of the measurement target portion is calculated based on the extracted edge.

  In this example, the case where the master image is acquired after the design data is acquired is described, but the order of acquiring the design data and the master image is arbitrary. That is, the configuration may be such that the design data is acquired after acquiring the master image.

  Next, the measurement setting data creation device 100 extracts design value information including design values and tolerances close to the calculated dimension values from the design data (step S405). At this time, if a plurality of design value information is extracted, the design value information is narrowed down based on the measurement type and the measurement position (steps S406 and S407). The narrowing down based on the measurement position is performed based on the distance between the designated measurement target location and the end point of the dimension line.

  In this example, a case is described in which narrowing down by measurement position is performed after narrowing down by measurement type, but the order of narrowing down is arbitrary. In other words, the configuration may be such that after narrowing down by measurement position, narrowing down by measurement type, or narrowing down by measurement type and narrowing down by measurement position simultaneously.

  Next, when a plurality of design value information still exists even after narrowing down based on the measurement type and measurement position, the measurement setting data creation device 100 places these design value information on the display 11 as design value candidates. Displayed (steps S408 and S409). Then, if any of the design value candidates is designated by a predetermined operation by the user, the measurement setting data creation device 100 sets the designated design value candidate as design value information for the measurement setting data at the measurement target location. The information is stored in association (steps S410 and S411). The processing procedure from step S403 to step S411 is repeated until the association of the design value information is completed for all the measurement target locations designated by the user. When the association is completed, the design value associated with the measurement target location is completed. Measurement setting data including information is generated (steps S412 and S413).

<Master image>
FIG. 7 is a diagram showing an example of the operation at the time of creation of the measurement setting data in the measurement setting data creation device 100 of FIG. The master image A1 is, for example, a photographed image obtained by photographing a master piece arranged in a low magnification field of view at a low magnification. In this figure, a master image A1 photographed during transmission illumination is shown. Further, the master piece is a reference object having the same shape and the same size as the workpiece to be measured, and here, it is made of a thin flat plate-like member.

  A measurement target location and a measurement type are designated for the master image A1. For specifying the measurement target location and measurement type, for example, an edge detection area A2 for edge extraction is set near the contour of the workpiece W in the master image A1, and the measurement type is set for the edge detection area A2. This is done by specifying. The setting of the edge detection area A2 and the designation of the measurement type are performed based on a user operation.

  Alternatively, if the user selects the vicinity of the contour of the workpiece in the master image A1, a function for automatically setting the measurement type can be selected by extracting an edge point from the master image A1 and fitting a geometric figure. .

  As described above, the image used for designating the measurement target location and the measurement type may be an actual image obtained by photographing a reference object such as a master piece, as in the master image A1, or the workpiece data from the CAD data. A pseudo image may be created and used.

<Design data>
FIG. 8 is a diagram showing an example of the operation at the time of creation of measurement setting data in the measurement setting data creation apparatus 100 of FIG. 1. Shape lines 1 and 2, dimension lines 3 to 5, design value 6 and tolerance 7 are shown. An example of CAD data to be included is shown. This CAD data is design data of the work W, and the position information of the shape lines 1 and 2 indicating the contour shape of the work W, the position information of the dimension lines 3 to 5, and the design associated with the dimension lines 3 to 5 It is composed of design value information consisting of a value 6 and tolerance 7, and dimension type information indicating a dimension type.

  The shape line 1 is an outline line indicating the outer edge and the inner edge of the workpiece W, and the shape line 2 is an outline line indicating the periphery of the small hole provided in the workpiece W. The dimension lines 3 to 5 indicate what the dimension is measured on which position on the shape lines 1 and 2.

  The dimension lines 3 and 5 are line segments used for entering dimensions, and a terminal symbol such as an arrow is arranged at one end. The dimension line 4 is a line segment drawn from the shape line in order to enter a dimension, and may be called a dimension extension line.

  The dimension type includes a length dimension, a diameter dimension, a radius dimension, an angle dimension, a coordinate dimension, an arc dimension, and the like. The length dimension includes a horizontal dimension, a vertical dimension, and an angle designation dimension. The horizontal dimension is a dimension indicating the length (distance) in the horizontal direction on the drawing, and the vertical dimension is a dimension indicating the length in the vertical direction.

  In this example, using the dimension lines 3 and 4, the distance between two parallel lines in the shape line 1 (design value “13.0”, tolerance “+0.1, −0.1” and design value “ 10.0 "and tolerances" +0.1, -0.1 ") are listed as horizontal dimensions. Further, by using the dimension lines 3 and 4, the distance between two parallel lines on the shape line 1 (design value “10.0” and tolerances “+0.1, −0.2” and design value “27. 0 ”and tolerances“ +0.2, −0.2 ”) are listed as vertical dimensions.

  Further, the diameter (design value “10.0” and tolerance “+0.05, −0.05”) of the circular shape line 2 is described as the diameter dimension using the dimension line 5. The symbol “φ” is attached to the design value “10.0” of the diameter dimension. The symbol “φ” indicates that the dimension type is a diameter.

  The measurement setting data creation device 100 extracts an edge from the master image A1 for the measurement target location designated for the master image A1 including the workpiece, and calculates the dimension value of the measurement target location based on the extracted edge. . Then, measurement setting data is created by extracting design value information including design values and tolerances close to the calculated dimension values from the design data.

<Display of design value candidates>
FIG. 9 is a diagram showing an example of the operation at the time of creation of measurement setting data in the measurement setting data creation apparatus 100 of FIG. 1, and shows a display example of a plurality of design value candidates extracted from CAD data. . Design value information including design values and tolerances associated with the measurement target location designated by the user on the master image A1 is extracted based on the dimension value A3 calculated by extracting an edge from the master image A1.

  Specifically, design value information whose design value is close to the dimension value A3 is extracted from the CAD data. For example, the difference between the dimension value A3 and the design value is taken as an error, and design value information whose magnitude is less than or equal to a predetermined threshold is extracted. Alternatively, design value information whose error is within the tolerance range is extracted.

  In this example, three pieces of design value information in which an error between the dimension value “9.95” and the design value falls within the tolerance range, that is, the design value “10.0” of the horizontal dimension and the tolerance “+0.1, -0.1 ", vertical dimension design value" 10.0 "and tolerances" +0.1, -0.2 ", diameter dimension design value" 10.0 "and tolerances" +0.05, -0 " .05 "is extracted. The design value information is displayed as a list as design value candidates.

  When a plurality of design value information is extracted as in this example, design value information is narrowed down. The design value information is narrowed down based on the measurement type and the measurement position. For example, if a length dimension is specified as the measurement type, only the design value information related to the length dimension is narrowed down, and the design value information such as the diameter dimension is excluded from the design value information to be associated with the measurement target location. The

  The design value information based on the measurement position is narrowed down by first aligning the workpiece W on the master image A1 with the shape lines 1 and 2 on the CAD data, and using geometric information between the two. . For example, when the measurement target location and measurement type specified on the master image A1 correspond to the horizontal dimension of the dimension type, the design value information is narrowed down to only the design value information whose dimension type is the horizontal dimension. Alternatively, the narrowing is performed based on the distance between the measurement target location and the end point of the dimension line.

  The alignment between the master image A1 and the CAD data may be automatically performed using a matching method such as pattern search, or the workpiece on the movable stage 12 is operated by operating the XY position adjustment knob 14a. It may be performed manually by moving W to a predetermined position.

  When displaying a list of design value candidates, the design value candidates are arranged in descending order of accuracy, for example. Specifically, when the accuracy is defined by the magnitude (absolute value) of the error between the dimension value A3 and the design value, the design value candidates are arranged in order from the smallest error in the list. Alternatively, when the accuracy is defined by the distance between the measurement target location and the end point of the dimension line, the design value candidates are arranged in order from the shortest distance.

<Control unit>
FIG. 10 is a block diagram illustrating a configuration example of the control unit 20 in the measurement setting data creation device 100 of FIG. 1, and illustrates an example of a functional configuration in the control unit 20. The control unit 20 includes a design data acquisition unit 21, a design data storage unit 22, a master image storage unit 23, a display control unit 24, a measurement target location designation unit 25, an edge extraction unit 26, a dimension value calculation unit 27, and design value information. The extraction unit 28, the design value candidate display unit 101, the design value candidate designation unit 102, the measurement setting data generation unit 103, and the measurement setting data storage unit 104 are configured.

  The design data acquisition unit 21 acquires CAD data from an external device and stores it in the design data storage unit 22. The CAD data includes position information of the shape line indicating the contour shape of the workpiece, position information of the dimension line, design value information including design values and tolerances associated with the dimension line, and dimension type information indicating the dimension type.

  The master image storage unit 23 stores a master image A1 including the workpiece W. The display control unit 24 generates screen data for displaying the master image A1 on the display 11 and outputs the screen data to the measurement unit 10.

  The measurement target location specifying unit 25 specifies the measurement target location and the measurement type for the master image A1 based on a predetermined operation input. The edge extraction unit 26 extracts an edge from the master image A1 for the measurement target location designated by the measurement target location designation unit 25. The dimension value calculation unit 27 calculates the dimension value of the measurement target location based on the edge extracted by the edge extraction unit 26 and outputs it to the design value information extraction unit 28.

  The design value information extraction unit 28 extracts design value information including design values and tolerances close to the dimension value calculated by the dimension value calculation unit 27 from the CAD data. Specifically, the difference between the dimension value and the design value is used as an error, and design value information whose magnitude is less than or equal to a predetermined threshold is extracted. Alternatively, design value information whose error is within the tolerance range is extracted. Alternatively, design value information including a design value closest to the calculated dimension value may be extracted.

  In the design value information extraction unit 28, when a plurality of design value information is extracted from the CAD data, the design value information is narrowed down based on the measurement type specified by the measurement target location specifying unit 25. Alternatively, the design value information is narrowed down based on the distance between the measurement target location specified by the measurement target location specifying unit 25 and the end point of the dimension line.

  The design value candidate display unit 101 displays a plurality of design value information extracted from CAD data by the design value information extraction unit 28 as design value candidates. The design value candidate designating unit 102 designates one of the design value candidates based on a predetermined operation input.

  The measurement setting data generation unit 103 associates the design value information extracted by the design value information extraction unit 28 and designated by the design value candidate designation unit 102 with the measurement target location, the design value information associated with the measurement target location, the measurement The measurement setting data is generated from the measurement target location specified by the target location specifying unit 25 and the measurement target location information including the measurement type. The measurement setting data storage unit 104 stores the measurement setting data generated by the measurement setting data generation unit 103.

  According to the present embodiment, an edge is extracted from the master image A1, the dimension value A3 of the measurement target portion is calculated, and design value information including design values and tolerances close to the calculated dimension value A3 is extracted from the CAD data. Since measurement setting data is generated, it is possible to save the trouble of inputting design values and tolerances for each measurement target location. Therefore, every time the workpiece to be measured is changed, it is not necessary to input a design value or tolerance, so that measurement setting data for measuring the workpiece dimensions can be easily created.

1, 2 Shape line 3-5 Dimension line 6 Design value 7 Tolerance 10 Measurement unit 11 Display 11a Display screen 12 Movable stage 13 Detection area 14a XY position adjustment knob 14b Z position adjustment knob 15 Power switch 16 Measurement start switch 20 Control unit 21 Design data acquisition unit 22 Design data storage unit 23 Master image storage unit 24 Display control unit 25 Measurement target location designation unit 26 Edge extraction unit 27 Dimension value calculation unit 28 Design value information extraction unit 31 Keyboard 32 Mouse 40 Housing 41 Z drive unit 42 XY driving units 43 and 44 Image sensor 50 Transmitting illumination unit 51 Transmitting illumination light source 52 Mirror 53 Optical lens 60 Ring illumination unit 71 Coaxial incident illumination light source 72 Half mirror 80 Light receiving lens units 81, 84, 86 Light receiving lens 82 Half mirror 83,85 Diaphragm plate 00 measurement setting data generating device 101 designed value candidate display unit 102 designed value candidate designation unit 103 measurement setting data generation unit 104 measurement setting data storage unit A1 master image A2 edge detection area A3 dimension

Claims (7)

In the measurement setting data creation device that creates the measurement setting data for measuring the dimensions of the workpiece by acquiring a workpiece image obtained by photographing the workpiece and detecting an edge in the workpiece image.
Design data acquisition means for acquiring design data including position information of a shape line indicating a contour shape of the workpiece, position information of a dimension line, and design value information including design values and tolerances associated with the dimension line;
For a master image including the workpiece, a measurement target location specifying means for specifying a measurement target location and a measurement type,
Edge extraction means for extracting an edge from the master image for the designated measurement target location;
Dimension value calculating means for calculating a dimensional value of the measurement target location based on the extracted edge;
Design value information extracting means for extracting design value information consisting of design values close to the calculated dimension value from the design data;
A measurement setting data generating unit configured to generate measurement setting data including the measurement target position information including the specified measurement target position and the measurement type, and the design value information associated with the measurement target position. A characteristic measurement setting data creation device.   The design value information extracting means narrows down the design value information based on a designated measurement type when two or more design value information is extracted from the design data. The measurement setting data creation device described.   3. The measurement setting data creation according to claim 2, wherein the design value information extracting unit narrows down the design value information based on a distance between a designated measurement target location and an end point of the dimension line. apparatus.   4. The measurement setting data creating apparatus according to claim 3, wherein the design value information extracting unit extracts design value information including a design value closest to the calculated dimension value. Design value candidate display means for displaying two or more design value information extracted from the design data as design value candidates;
Design value candidate designating means for designating any of the above design value candidates,
5. The measurement setting data creation device according to claim 1, wherein the measurement setting data generation unit generates the measurement setting data including a designated design value candidate as the design value information. In a measurement setting data creation method for creating measurement setting data for measuring the dimensions of the workpiece by acquiring a workpiece image obtained by photographing the workpiece and detecting an edge in the workpiece image.
A design data acquisition step for acquiring design data including position information of a shape line indicating the contour shape of the workpiece, position information of a dimension line, and design value information including design values and tolerances associated with the dimension line;
For the master image including the workpiece, a measurement target location specifying step for specifying a measurement target location and a measurement type,
An edge extraction step for extracting an edge from the master image for the designated measurement target location;
A dimension value calculating step for calculating a dimension value of the measurement target location based on the extracted edge;
A design value information extraction step for extracting design value information consisting of design values close to the calculated dimension values from the design data;
A measurement setting data generation step for generating measurement setting data including the measurement target position information including the specified measurement target position and the measurement type, and the design value information associated with the measurement target position. Measurement setting data creation method. In a program for a measurement setting data creation device that creates a measurement setting data for measuring a dimension of the workpiece by acquiring a workpiece image obtained by photographing a workpiece and detecting an edge in the workpiece image.
A design data acquisition procedure for acquiring design data including position information of a shape line indicating a contour shape of the workpiece, position information of a dimension line, and design value information including design values and tolerances associated with the dimension line;
For the master image including the workpiece, a measurement target location specifying procedure for specifying the measurement target location and measurement type,
Edge extraction procedure for extracting an edge from the master image for the designated measurement target location,
Based on the extracted edge, a dimension value calculation procedure for calculating the dimension value of the measurement target part,
Design value information extraction procedure for extracting design value information consisting of design values close to the calculated dimension values from the design data;
A measurement setting data generation procedure for generating measurement setting data including the measurement target position information including the specified measurement target position and the measurement type, and the design value information associated with the measurement target position; A program for a characteristic measurement setting data creation device.

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