JP4812477B2 - Image measurement device part program generation device, image measurement device part program generation method, and image measurement device part program generation program - Google Patents

Description

  The present invention relates to a part program generation device for an image measurement device, a method thereof, and a program for generating a part program describing a measurement procedure for a measurement object (hereinafter referred to as a workpiece).

  2. Description of the Related Art Conventionally, in a CNC (Computer Numerical Control) type image measuring apparatus, a part program describing workpiece measurement conditions is generally created using the following two methods. One is a method (online teaching) in which an actual work is placed on the measuring machine and the measurement procedure is stored in the image measuring device, and the other is to display the two-dimensional CAD data of the work on the screen, This is a method (offline teaching) in which a specific region is designated by operating a mouse or the like, and a measurement procedure is stored in the image measurement device. In addition, after the work image is divided into a plurality of ranges and photographed, the plurality of images are combined into one sheet, and the positional relationship between the images of each of the plurality of ranges is recorded, and the combined work image is combined into one sheet. Based on this, a technique for creating a part program is disclosed (Patent Document 1).

In the above teaching, for example, when workpieces with fixed-shaped edges formed in equal directions and at equal intervals are targeted, if a so-called STEP & REPEAT function that measures edges at equal intervals is incorporated, a part program can be created quickly It becomes possible to do.
JP 2003-203216 A

  However, in fact, many workpieces have a plurality of fixed-shaped edges, but not all of the fixed-shaped edges are arranged in equal directions and at equal intervals. Therefore, it is rare that the STEP & REPEAT function can be applied to the entire work. In many cases, the operator uses the STEP & REPEAT function partially for the work, or each edge of a fixed shape is manually specified. It must be specified, and it still takes a lot of time to generate the part program.

  The present invention has been made in view of such problems, and when a workpiece has a plurality of edges having a fixed shape, a part program can be quickly created without manually specifying each edge manually. An object of the present invention is to provide an image measurement device part program generation device, a method thereof, and a program thereof.

To achieve the above object, a part program generation device according to the first invention of the present application is used in an image measurement device that measures a workpiece based on CAD data, and generates a part program that describes a measurement procedure. A part program generation apparatus, wherein CAD data fetching means for fetching CAD data, display means for displaying the fetched CAD data, and an area of CAD data displayed on the display means can be arbitrarily selected. And a selection area extracting means for extracting the CAD data, and a CAD for specifying a plurality of edge group data included in the extracted CAD data and each of which is divided, and for specifying a tip portion of the plurality of edge group data a data specifying means specifies the measurement condition in at least one of the plurality of the edge group data A measurement condition setting unit that, characterized in that a measurement condition assigning means for assigning the measurement condition to a plurality of said tip portion.

  With such a configuration, the leading end portion of the CAD data divided by the CAD data specifying means is specified based on the CAD data extracted by the selection area extracting means. If the measurement condition is specified for any one divided CAD data by the measurement condition setting means for the CAD data in which the front end and the central axis are specified, the measurement condition assigning means performs the above operation on all the divided CAD data. A measurement condition for any one piece of divided CAD data is designated, and a part program can be generated.

The CAD data specifying unit may specify end points of the extracted CAD data based on the extracted CAD data, and may specify a plurality of the edge group data based on the end points. Moreover, the CAD data specifying means, said with placing multiple extraction points on the edge group data to identify the line segment connecting between the extraction point to identify the angular difference between the line segment, of the angular difference An extraction point related to a predetermined angle difference may be specified, and the tip portion may be specified based on the extraction point .

Further, the CAD data specifying means sets a line segment at an average position of the plurality of line segments arranged at positions other than the tip portion as a central axis of the edge group data, and assigns the measurement condition allocation The means may be configured to assign the measurement condition to a plurality of the tip portions by aligning the coordinate axis of the designated measurement condition with the central axis .

In order to achieve the above object, a part program generation method according to the second invention of the present application is used in an image measurement apparatus for measuring a workpiece based on CAD data, and generates a part program describing a measurement procedure. A part program generation method, wherein a CAD data fetching step for fetching CAD data, a display step for displaying the fetched CAD data, and an area of the CAD data displayed by the display step can be arbitrarily selected. And a selection region extracting step for extracting the selected CAD data, and specifying a plurality of edge group data included in the extracted CAD data and each of which is divided, and a leading end portion of the plurality of edge group data and CAD data specifying step of specifying, a plurality of the edge group data A measurement condition setting step of specifying at least one the measurement condition Chi, characterized in that a measurement condition assignment step of assigning the measurement condition to a plurality of said tip portion.

In order to achieve the above object, a program for generating a part program for an image measuring device according to a third invention of the present application is used in an image measuring device for measuring a workpiece based on CAD data, and describes a measurement procedure. A part program generation method for generating a part program, wherein a CAD data fetching step for fetching CAD data, a display step for displaying the fetched CAD data, and an area of the CAD data displayed by the display step are arbitrarily set A selection area extracting step for extracting the selected CAD data, and specifying a plurality of edge group data included in the extracted CAD data and each divided, and a plurality of the edge groups and CAD data specifying step of specifying a distal portion of the data, a plurality of the A measurement condition setting step of specifying at least one the measurement condition of Tsu di group data, and characterized in that it is configured so as to execute the measurement condition assignment step of assigning the measurement condition to a plurality of said tip portion to the computer To do.

  According to the present invention, based on the CAD data extracted by the selection area extracting means, the leading end portion of the CAD data divided by the CAD data specifying means is specified, and any one piece of CAD data divided by the measurement condition setting means If the measurement condition is designated in the above, the measurement condition for the arbitrary one divided CAD data is designated for all the divided CAD data by the measurement condition assigning means, and a part program can be generated. Become. Therefore, when measuring a workpiece having a plurality of parts having the same shape, it is possible to quickly create a part program without manually setting measurement conditions for each part having the same shape.

  A preferred embodiment of a part program generating device for an image measuring device according to the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a perspective view showing an overall configuration of an image measuring device part program generating device according to the present embodiment. This system includes a non-contact type image measuring machine 1, a computer system 2 that drives and controls the image measuring machine 1, executes necessary data processing, and a printer 3 that prints out measurement results. Yes.

  The image measuring machine 1 is configured as follows. That is, a measurement table 13 on which the workpiece 12 is placed is mounted on the gantry 11, and this measurement table 13 is driven in the Y-axis direction by a Y-axis drive mechanism (not shown). Support arms 14 and 15 extending upward are fixed to the center of both side edges of the gantry 11, and an X-axis guide 16 is fixed so as to connect both upper ends of the support arms 14 and 15. An imaging unit 17 is supported on the X-axis guide 16. The imaging unit 17 is driven along the X-axis guide 16 by an X-axis drive mechanism (not shown). A CCD camera 18 is mounted on the lower end of the imaging unit 17 so as to face the measurement table 13. Further, in the imaging unit 17, in addition to a lighting device and a focusing mechanism (not shown), a Z-axis drive mechanism that moves the position of the CCD camera 18 in the Z-axis direction, and a position of the CCD camera 18 in the Z-direction at the shooting position A position sensor 19 for detecting is incorporated.

  The computer system 2 includes a computer main body 21, a keyboard 22, a joystick box (hereinafter referred to as J / S) 23, a mouse 24, and a CRT 25. The computer main body 21 is configured, for example, as shown in FIG. That is, the image information of the workpiece 12 input from the CCD camera 18 is stored in the image memory 32 via the interface (hereinafter referred to as I / F) 31.

  The CAD data of the workpiece 12 created by a CAD system (not shown) is input to the CPU 35 via the I / F 33, for example, when offline teaching using CAD data is executed, and is converted into image information such as a bitmap by the CPU 35. After being expanded, it is stored in the image memory 32. The image information stored in the image memory 32 is displayed on the CRT 25 via the display control unit 36.

  On the other hand, code information and position information input from the keyboard 22, J / S 23, and mouse 24 are input to the CPU 35 via the I / F 34. The CPU 35 performs measurement execution processing, part program creation, according to a macro program stored in the ROM 37 and a measurement execution program stored in the RAM 40 from the HDD 38 via the I / F 39, a measurement result display program, a part program generation program, a part program, etc. And display processing of the measurement results.

  The CPU 35 controls the image measuring device 1 via the I / F 41 according to the measurement execution process. The HDD 38 is a recording medium that stores CAD data, a measurement execution program, a measurement result display program, a part program, and the like. The RAM 40 stores various programs and provides a work area for various processes.

  FIG. 3 is a functional block diagram of the part program generation device. When the image acquisition unit 51 captures a workpiece and generates a part program, the CCD camera 18 is driven in a specified range of the workpiece 12 based on the operation of the keyboard 22, the mouse 24, etc. Take a picture. The photographed work image is converted into a vector image by the work image developing unit 52 and stored in the image memory 32 or the HDD 33. The work image composition unit 53 synthesizes a plurality of work images stored in the image memory 32 or the HDD 33 into a single work image. The coordinate system setting unit 54 performs a coordinate system setting for making the coordinate system based on the image of the work combined on one sheet and the coordinate system of the work 12 coincide with each other. The part program generation unit 55 generates a part program based on the work image for which the coordinate system has been set.

  On the other hand, when CAD data is taken in and a part program is generated, the CAD data acquisition unit 56 acquires CAD data of the work 12 based on operations of the keyboard 22 and the mouse 24. The acquired CAD data is output to the image memory 32 or the display control unit 36 and displayed on the CRT 25.

  The CAD data correction unit 57 sets the removal of duplicated CAD data, the combination of segments (drawn straight lines and curves), the measurement order of the combined segments, and the like.

  The extraction area designating unit 58 receives a user's operation of the keyboard 22, J / S 23, mouse 24, etc. from the CAD data displayed on the CRT 25, and extracts a part of the CAD data.

  The CAD data specifying unit 59 specifies edge group data including a series of segments from a part of the CAD data extracted by the extraction region specifying unit 58, and specifies the tip position and the center axis of the edge group data.

  The measurement condition setting unit 60 accepts the operation of the keyboard 22, J / S 23, mouse 24, and the like by the user, and sets measurement conditions including types such as a preset edge detection tool described later.

  Based on the measurement conditions set by the measurement condition setting unit 60 as described above, the part program generation unit 55 sets measurement conditions for all the feature images extracted by the extraction region specification unit 58, and Generate a program file. The generated part program file is appropriately edited by the part program editing unit 61. The generated and edited part program file is stored in the HDD 38 or the like via the part program output unit 62.

  Next, an edge detection tool used in the part program generation apparatus will be described with reference to FIGS. Here, the edge detection tool is a tool that allows measurement conditions to be determined by a mouse operation based on CAD data of a workpiece displayed on the CRT 25. FIG. 4A shows the simplest tool (hereinafter referred to as a simple tool) 71. The density level of image information 72 obtained by imaging a workpiece at the time of measurement changes abruptly from the base end to the tip end of the arrow. This is to detect a point as an edge point. The simple tool 71 is defined by the position coordinates (X, Y) of the midpoint, its length W, and the angle θ, and can be placed at any position on the workpiece image by dragging the mouse. FIG. 4B is a rectangular tool 73 (hereinafter referred to as a box tool), which is suitable for detecting the straight line image information 72a. The middle point position coordinates (X, Y) and the lengths of the arrows on both sides are shown. It is defined by W, the width H between the arrows on both sides, and the angle θ. In the case of the box tool 73, edge detection from the base end of the arrow toward the tip is repeated at a preset interval ΔH in the width H. FIG. 6C is a circular tool (hereinafter referred to as a circular tool) 74, which is suitable for detection of circular image information 72b. The position coordinates (X, Y), the inner diameter r1 for starting measurement, and the measurement Defined by the outer diameter r2. In the case of the circular tool 74, it rotates around the coordinates (X, Y) at a preset angle Δθ, and edge detection from the base end of the arrow toward the tip is repeated. In addition to the box tool and the circle tool, there are an arc tool and the like. Although all the parameters of these tools 71, 73, and 74 may be obtained by calculation for each graphic element, the calculation processing becomes complicated, and here, only the positions and inclinations of the tools 71, 73, and 74 are measured. The calculation processing amount is reduced by calculating and determining each selected graphic element.

  Therefore, in setting the edge detection tool, only the edge type (tool type), number, length W (number of pixels), and number of offsets are set for each type of graphic element (line, circle, arc, etc.). 5A, the simple tool 71 is applied to the rectangular image information 72c, the number n is 3, the offset is set to OFF from both ends of the upper side, and the range A in the figure is the arrangement range of the simple tool 71. An example of setting is shown. The reason for setting the offset OFF is to avoid an error that the edge cannot be detected due to the simple tool 71 being arranged at the end of the line or arc. The offset OFF may be set as a length or may be set as a percentage of the line length. FIG. 4B shows an example in which four simple tools 71 are arranged for the circular image information 72b. In the case of a circle, no offset is required.

  The contents thus set are shown in FIG. For each graphic element, the tool type, the number of tools, the length W, and the offset OFF are set in the measurement condition setting unit 59 as edge detection tool generation conditions. In this example, not only the primary candidates but also other tool candidates when the generation of the primary candidate tools fails are set as secondary candidates.

  Next, a part program generation procedure in the non-contact image measurement system configured as described above will be described with reference to FIGS. FIG. 7 is a flowchart showing the procedure of part program automatic generation processing.

  8 to 13 illustrate a case where CAD data is, for example, a lead frame. As shown in FIG. 8, the CAD data 8 includes a rectangular die pad 81, a plurality of lead portions 82 whose ends are located in the vicinity of the die pad 81, and four lead connection portions 83 connected to the die pad 81. Have In this control shown in the flowchart of FIG. 7, the edges of a plurality of lead portions 82 that require time for setting the edge detection tool in manual operation are measured.

  First, the CAD data acquisition unit 56 receives input from the keyboard 22 and the mouse 24, acquires CAD data, and displays the CAD data 8 (lead frame) on the CRT 25 as shown in FIG. 8 (step S1). .

  Next, the CAD data correction unit 57 performs deduplication of CAD data (step S2). Subsequently, the CAD data correction unit 57 joins the segments (straight line or arc) of the CAD data (step S3), and sets the segment reading order [1] to [12] in the joining order between the segments (step S4). ). This duplication of CAD data is caused by repeated processing such as dividing, joining, expanding / contracting, moving, copying, etc. in the creation process. In such a creation process, segments are joined. Such processing is not performed.

  Here, with reference to FIG. 9, the process of said step S1-step S4 is demonstrated. FIG. 9 is a partially enlarged view of CAD data. First, from the state of FIG. 9A, the duplicate data 8a to 8d of the CAD data 8 are removed by duplication, and as shown in FIG. 9B, CAD data 8e without duplication is obtained. In this CAD data 8e, the segments are not connected, and the order of reading these segments is not set continuously between adjacent segments as in [1] to [12]. Next, as shown in FIG. 9C, the CAD data correction unit 57 joins the segments of the CAD data 8e, and segments each of the CAD data 8e with segment numbers [1] along the joining order. The corrected CAD data 8f set with [12] is generated.

  Subsequent to step S4, the extraction area setting unit 58 receives input from the user via the keyboard 22, J / S 23, and mouse 24, and sets the extraction area of CAD data (step S5). For example, as shown in FIG. 10, a pointer P operated by the mouse 24 is displayed on the CRT 25. For example, the user moves the pointer P to a position 84 and clicks the mouse 24, and then clicks the mouse 24. By dragging, the pointer P is moved to the position 85 and the image is surrounded by a rectangular selection area boundary line 86 to determine the CAD data extraction area.

  Once the CAD data extraction area is set, the CAD data specifying unit 59 then determines the edge group data 8gn (n is a natural number) from the selection area boundary line 86 (step S6). Subsequently, the tip position of the edge group data 8gn and its central axis are calculated (step S7).

  Here, with reference to FIG.10 and FIG.11, the process of the said step S6 and step S7 is demonstrated. FIG. 11 is a partially enlarged view of CAD data as in FIG. As shown in FIGS. 10 and 11A, when the extraction area setting unit 58 receives a selection area boundary line 86 by the user's operation in the corrected CAD data 8f, as shown in FIG. Edge group data 8gn constituting one lead portion is determined from an end point 87 which is an intersection of the boundary line 86 and the corrected CAD data 8f. Next, as shown in FIG. 11C, the CAD data specifying unit 59 determines an extraction point 8hn (n is a natural number) in the reading order for each segment constituting each edge group data 8gn.

  For example, as shown in FIG. 11 (d), the CAD data specifying unit 59 includes line segments Ln (n is a natural number) in the order of segments between each extraction point 8 hn (n = 1 to 9 in FIG. 11 (d)). (N = 1 to 9 in FIG. 11D) is generated. Then, when the angular difference between the line segment Ln before and after the predetermined extraction point 8hn and the line segment Ln + 1 exceeds a predetermined threshold, the CAD data specifying unit 59 extracts the extraction point that forms the tip 91. It is judged that. In FIG. 11D, since the angular difference between the line segment L4 and the line segment L5 and the angular difference between the line segment L5 and the line segment L6 exceed a predetermined threshold, the extraction point 8h4 The extraction point 8h5 is determined to be the extraction point constituting the tip 91. In this case, the tip 91 is determined as the midpoint between the extraction point 8h4 and the extraction point 8h5. In addition, the CAD data specifying unit 59 averages line segments L1 to L4 and line segments L6 to L9 extending from the extraction points 8h1 to 8h3 and the extraction points 8h6 to 8h8 that do not constitute the tip 92. The line segment is defined as a central axis 92 extending from the tip 91.

  The processes in steps S6 and S7 are executed for each edge group data 8gn, and as shown in FIG. 12, a tip 91 and a central axis 92 are set in each edge group data 8gn.

  Next, the measurement condition setting unit 60 receives input from the user of the keyboard 22, J / S 23, and mouse 24, sets the measurement condition to any one of the edge group data 8gn, and sets the setting condition to all the edges. Set for the group data 8gn (step S8). Here, the setting conditions are the setting of the type of edge detection tool, the setting of the number of edge detection tools to be arranged, the setting of the size of the edge detection tool, the offset value, and the like.

  For example, as shown in FIG. 13, the processing in step S8 is performed for each edge group data 8gn, a coordinate system consisting of a central axis 92 having the tip 91 as the origin and an axis 93 intersecting the central axis 92 (X , Y). That is, the coordinates of the centers w1 and w2 of the box tools 73 and 73 arranged in any one edge group data 8gn are obtained, and the coordinates are assigned to the respective coordinate systems (X, Y) of all the other edge group data 8gn. This is done by mapping. The arrangement of the edge detection tools in FIG. 13 is an example, and the number of edge detection tools to be arranged may be two or more, and is not limited to the box tool 73.

  If the steps up to S8 are completed as described above, the part program generator 55 generates a part program (S9).

  As described above, in the embodiment described above, CAD data is acquired, a region of the CAD data is extracted, and an angle difference between line segments connecting the end of the extracted CAD data and the extraction point is calculated. Edge group data that characterizes CAD data is specified, and an edge detection tool (such as a box tool 73a) is set to any one of the edge group data by the measurement condition setting unit 60. Since the edge detection tool is configured to be automatically set, when the workpiece has a plurality of edges having a fixed shape, a part program can be quickly created without manually specifying each edge manually.

  Although the embodiments of the invention have been described above, the present invention is not limited to these embodiments, and various modifications, additions, substitutions, and the like can be made without departing from the spirit of the invention. For example, in the present embodiment, a part program is created based on CAD data. However, it is also possible to create a part program by binarizing captured image data.

It is a perspective view which shows the structure of the part program production | generation apparatus for image measuring devices which concerns on embodiment of this invention. It is a block diagram which shows the structure of the computer main body in the part program production | generation apparatus for image measuring devices which concerns on embodiment of this invention. It is a functional block diagram of the part program generation device for image measuring devices concerning an embodiment of the invention. It is a figure which shows an example of an edge detection tool. It is a figure for demonstrating the setting of a measurement condition. It is a figure for demonstrating the setting of a measurement condition. The flowchart which shows operation | movement of the part program production | generation apparatus for image measuring devices which concerns on embodiment of this invention is shown. It is a display example of CAD data on CRT25 of the part program generation device for image measuring devices concerning an embodiment of the invention. It is a display example of CAD data on CRT25 of the part program generation device for image measuring devices concerning an embodiment of the invention. It is a display example of CAD data on CRT25 of the part program generation device for image measuring devices concerning an embodiment of the invention. It is a display example of CAD data on CRT25 of the part program generation device for image measuring devices concerning an embodiment of the invention. It is a display example of CAD data on CRT25 of the part program generation device for image measuring devices concerning an embodiment of the invention. It is a display example of CAD data on CRT25 of the part program generation device for image measuring devices concerning an embodiment of the invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Image measuring machine, 2 ... Computer system, 3 ... Printer, 11 ... Mount, 12 ... Workpiece, 13 ... Measurement table, 14, 15 ... Support arm, 16 ... X-axis guide, 17 ... Imaging unit, 18 ... CCD camera , 19 ... Position sensor, 21 ... Computer main body, 22 ... Keyboard, 23 ... Joystick box, 24 ... Mouse, 25 ... CRT, 31, 33, 34, 39, 41 ... I / F, 32 ... Image memory, 35 ... CPU 36 ... Display control unit 37 ... ROM 38 ... HDD 40 ... RAM 51 ... Image acquisition unit 52 ... Work image development unit 53 ... Work image synthesis unit 54 ... Coordinate system setting unit 55 ... Part program generation unit , 56... CAD data acquisition unit, 57... CAD data correction unit, 58... Extraction region designation unit, 59... CAD data identification unit, 60. , 61 ... part program editing section.

Claims (6)

A part program generation device that is used in an image measurement device that measures a workpiece based on CAD data and generates a part program that describes a measurement procedure,
CAD data fetching means for fetching CAD data;
Display means for displaying the captured CAD data;
A selection area extracting means for arbitrarily selecting an area of the CAD data displayed on the display means and extracting the CAD data;
CAD data specifying means for specifying a plurality of edge group data included in the extracted CAD data and each of which is divided, and specifying a tip portion of the plurality of edge group data ;
Measurement condition setting means for specifying a measurement condition for at least one of the plurality of edge group data ;
A part program generation device for an image measuring device , comprising: measurement condition assigning means for assigning the measurement condition to a plurality of the tip portions . 2. The image measurement according to claim 1, wherein the CAD data specifying unit specifies an end point of the extracted CAD data based on the extracted CAD data, and specifies a plurality of the edge group data based on the end point. Device part program generator. The CAD data specifying means arranges a plurality of extraction points on the edge group data , specifies a line segment connecting the extraction points, specifies an angle difference between the line segments, and determines a predetermined angle of the angle difference. 3. The part program generation device for an image measurement device according to claim 1, wherein an extraction point related to the difference is specified, and the tip portion is specified based on the extraction point . The CAD data specifying means sets a line segment at an average position of the plurality of line segments arranged at positions other than the tip portion as a central axis of the edge group data ,
The measurement condition assigning means, by matching the coordinate axes of the specified measurement conditions to said central axis, any one of claims 1 to 3, characterized in that assigning the measurement condition to a plurality of said distal portion A part program generation device for an image measurement device as described. A part program generation method for generating a part program that is used in an image measurement apparatus that measures a workpiece based on CAD data and describes a measurement procedure,
A CAD data capturing step for capturing CAD data;
A display step for displaying the captured CAD data;
A selection area extracting step for arbitrarily selecting an area of the CAD data displayed in the display step and extracting the selected CAD data;
A CAD data specifying step of specifying a plurality of edge group data included in the extracted CAD data and each of which is divided, and specifying a tip portion of the plurality of edge group data ;
A measurement condition setting step for specifying a measurement condition for at least one of the plurality of edge group data ;
A method for generating a part program for an image measuring device , comprising: a measurement condition assigning step for assigning the measurement condition to a plurality of the tip portions . A part program generation method for generating a part program that is used in an image measurement apparatus that measures a workpiece based on CAD data and describes a measurement procedure,
A CAD data capturing step for capturing CAD data;
A display step for displaying the captured CAD data;
A selection area extracting step for arbitrarily selecting an area of the CAD data displayed in the display step and extracting the selected CAD data;
A CAD data specifying step of specifying a plurality of edge group data included in the extracted CAD data and each of which is divided, and specifying a tip portion of the plurality of edge group data ;
A measurement condition setting step for specifying a measurement condition for at least one of the plurality of edge group data ;
A program for generating a part program for an image measuring device , wherein the computer executes a measurement condition assigning step for assigning the measurement condition to a plurality of the tip portions .

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