JP2018031748A - Three-dimensional measurement device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a three-dimensional measuring device capable of facilitating dimension measurement for a three-dimensional solid shape. SOLUTION: Shape data generation means for measuring position information of a plurality of measurement points in a three-dimensional space and generating stereoscopic shape data representing a stereoscopic shape of an object to be measured, and measuring a stereoscopic shape based on the stereoscopic shape data. A shape data display means to be displayed on the screen, a reference plane extracting means for specifying the reference plane based on the designation of the position with respect to the three-dimensional shape being displayed, and a normal line of the reference plane is orthogonal to the measurement screen, or the measurement screen The posture changing means for rotating the three-dimensional shape so as to be parallel to the vertical direction or the horizontal direction, the cutting line designating means for accepting the designation of the cutting line in the measurement screen, and the three-dimensional shape after rotation was cut by the cutting line. In this case, it is configured by a cross-section profile acquisition unit that acquires a cross-section profile that represents the shape of the cut surface and a cross-section measurement unit that performs dimension measurement based on the cross-section profile. [Selection diagram]

Description

  The present invention relates to a three-dimensional measurement apparatus, and more particularly to an improvement of a three-dimensional measurement apparatus that measures a three-dimensional shape of a measurement object.

  A three-dimensional measuring device is a measuring instrument that three-dimensionally measures the shape and dimensions of an object to be measured, and measures the position information of a large number of measurement points in a three-dimensional space using the principle of triangulation. The three-dimensional shape data representing the three-dimensional shape of the measurement object can be acquired. For example, striped pattern light is projected onto the measurement object placed on the stage, and the measurement object on the stage is photographed by the camera in this state. The height information of the object to be measured is obtained from analysis of a captured image and pattern deviation or distortion.

  Based on the solid shape data acquired in this way, the solid shape of the measurement object is displayed on the screen. The dimension measurement is performed by, for example, extracting a geometric element by designating a geometric element at a measurement location or its shape and obtaining a distance or angle between the geometric elements.

  In the conventional three-dimensional measuring apparatus, it is necessary to specify the measurement location, the shape of the geometric element, and the dimension type for the three-dimensional shape on the screen. For this reason, there has been a problem that it is difficult to determine where a measurement location is designated and how the measurement can be performed to obtain a desired dimension. In addition, there is a problem that it is difficult to know how to measure a portion described in a two-dimensional design drawing.

  In addition, by obtaining and displaying the cross-sectional shape when the three-dimensional shape is cut by the cut surface, the three-dimensional shape is represented by a two-dimensional geometric figure, so that dimension measurement is easy to perform. However, since the position and orientation of the measurement object change with each measurement, it is difficult to appropriately specify the cut surface.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a three-dimensional measuring apparatus capable of facilitating dimensional measurement for a three-dimensional solid shape. In particular, it is an object to provide a three-dimensional measuring apparatus capable of intuitively specifying a measurement location, a shape of a measurement element, and a dimension type. It is another object of the present invention to provide a three-dimensional measuring apparatus that can easily measure the dimensions of a portion described in a design drawing.

  The three-dimensional measuring apparatus according to the first aspect of the present invention measures the position information of a plurality of measurement points in a three-dimensional space, and generates the three-dimensional shape data representing the three-dimensional shape of the measurement object; Shape data display means for displaying the three-dimensional shape on the measurement screen based on the three-dimensional shape data, reference plane extraction means for specifying a reference plane based on designation of a position with respect to the three-dimensional shape being displayed, and the reference plane The posture changing means for rotating the three-dimensional shape so that the normal line is orthogonal to the measurement screen or parallel to the vertical or horizontal direction of the measurement screen, and the cutting line in the measurement screen is designated. A cutting line designation unit that accepts, a cross-sectional profile acquisition unit that acquires a cross-sectional profile that represents the shape of the cut surface when the three-dimensional shape after rotation is cut by the cutting line, Based on the cross-sectional profile, and a cross section measuring means for performing dimensional measurement.

  According to such a configuration, since the reference plane has a specific posture with respect to the measurement screen, in order to obtain a desired cut surface as a cut surface when the three-dimensional shape is cut by the cut line, what kind of cut line You can intuitively understand where to cut. In addition, the cutting line is a one-dimensional geometric figure in the measurement screen, and since the cut surface is perpendicular to the measurement screen, compared to the case of directly specifying the two-dimensional cut surface in the three-dimensional space, Specification of the cut surface can be facilitated. Furthermore, since dimension measurement is performed based on a cross-sectional profile by a desired cut surface, it is possible to intuitively specify a measurement location, a shape of a measurement element, and a dimension type. Moreover, the dimension measurement of the location described in the design drawing can be easily performed. Here, the one-dimensional geometric figure includes lines such as a straight line, a broken line, a curved line, and a combination thereof.

  In the three-dimensional measuring apparatus according to the second aspect of the present invention, in addition to the above configuration, the reference plane extracting means determines a reference axis in the reference plane based on the shape of the reference plane, and the posture changing means The solid shape is configured to rotate so that the reference axis coincides with the vertical direction or the horizontal direction of the measurement screen. According to such a configuration, it is possible to improve the appearance when the three-dimensional shape is rotated so that the reference plane has a specific posture with respect to the measurement screen.

  In addition to the above-described configuration, the three-dimensional measurement apparatus according to the third aspect of the present invention is configured such that the cutting line designating unit determines the cutting line by designating a two-dimensional position on the measurement screen. According to such a configuration, it is possible to designate a cutting line by designating a two-dimensional position on the measurement screen for a three-dimensional shape whose reference plane is in a specific posture with respect to the measurement screen.

  The three-dimensional measuring apparatus according to the fourth aspect of the present invention further includes geometric element extraction means for specifying a geometric element based on designation of a position with respect to the three-dimensional shape being displayed, in addition to the above configuration, and the cutting line designation The means is configured to determine the cutting line based on a projection position where the geometric element is projected onto the measurement screen. According to such a configuration, the cutting line can be designated using the geometric element extracted from the three-dimensional shape.

  The three-dimensional measuring apparatus according to the fifth aspect of the present invention further includes edge extraction means for extracting an edge from a projection image obtained by projecting the three-dimensional shape after rotation onto the measurement screen in addition to the above-described configuration, and the cutting line designation Means are configured to determine the cutting line based on the edge. According to such a configuration, a cutting line can be designated using an edge extracted from a projection image.

  In the three-dimensional measurement apparatus according to the sixth aspect of the present invention, in addition to the above-described configuration, the reference plane extracting unit determines a rotation center in the reference plane based on the shape of the reference plane, and the posture changing unit includes Based on a user operation, the three-dimensional shape is rotated about a straight line passing through the rotation center and perpendicular to the measurement screen. According to such a configuration, it is possible to improve the appearance when the three-dimensional shape is rotated so that the reference plane has a specific posture with respect to the measurement screen.

  According to the present invention, since dimension measurement is performed based on a cross-sectional profile by a desired cut surface, it is possible to intuitively specify a measurement location, a shape of a measurement element, and a dimension type. Moreover, the dimension measurement of the location described in the design drawing can be easily performed. Accordingly, it is possible to facilitate dimensional measurement for a three-dimensional solid shape.

It is the system figure which showed one structural example of the three-dimensional measuring apparatus 1 by embodiment of this invention. It is explanatory drawing which showed typically the example of 1 structure of the measurement part 2 of FIG. 3 is a flowchart showing an example of an operation at the time of dimension measurement in the three-dimensional measuring apparatus 1. 4 is a flowchart showing an example of detailed operation for step S101 (brightness adjustment of floodlight) in FIG. 3. 4 is a flowchart showing an example of detailed operation in step S102 (brightness adjustment of texture illumination) in FIG. 4 is a flowchart showing an example of detailed operation for step S113 (data analysis) in FIG. It is the block diagram which showed an example of the function structure in the information processing terminal 5 of FIG. It is the figure which showed an example of the operation | movement at the time of the setting of the reference plane in the information processing terminal 5 of FIG. It is the figure which showed an example of the operation | movement at the time of the setting of the reference plane in the information processing terminal 5 of FIG. 7, and the measurement screen 6 after extracting the reference plane 8 from the solid shape currently displayed is shown. FIG. 8 is a diagram illustrating an example of an operation at the time of setting a reference plane in the information processing terminal 5 of FIG. 7, and shows a measurement screen 6 after the reference plane 8 is directly opposed. FIG. 8 is a diagram illustrating an example of an operation at the time of setting a reference plane in the information processing terminal 5 in FIG. 7, and shows a measurement screen 6 when the reference plane 8 is oriented in the horizontal direction. FIG. 8 is a diagram illustrating an example of an operation at the time of setting a reference plane in the information processing terminal 5 of FIG. 7, and shows a measurement screen 6 when the reference plane 8 is oriented in the vertical direction. It is the figure which showed an example of the operation | movement at the time of the cross-section measurement in the information processing terminal 5 of FIG. It is the figure which showed an example of the operation | movement at the time of the cross-section measurement in the information processing terminal 5 of FIG. 7, and the case where the cutting line 93 is designated using the geometric element extracted from the solid shape is shown. It is the figure which showed an example of the operation | movement at the time of the report file output in the information processing terminal 5 of FIG. It is the flowchart which showed an example of the operation | movement at the time of the cross-section measurement in the information processing terminal 5 of FIG.

  First, a schematic configuration of a three-dimensional measuring apparatus according to the present invention will be described below with reference to FIGS.

<3D measuring device 1>
FIG. 1 is a system diagram showing a configuration example of a three-dimensional measuring apparatus 1 according to an embodiment of the present invention. The three-dimensional measuring apparatus 1 is a measuring instrument that optically measures the shape of the measuring object W, and includes a measuring unit 2, a controller 4, and an information processing terminal 5.

<Measurement unit 2>
The measurement unit 2 is a measurement unit that irradiates the measurement target W on the stage 21 with measurement light composed of visible light, receives the measurement light reflected by the measurement target W, and generates a photographed image. 20, a stage 21, a stage holding unit 22, a rotation driving unit 23, and a control board 27.

  The head unit 20 includes a light projecting unit 24 that irradiates measurement light having a pattern on the measurement target W, and a light reception unit 25 that receives the measurement light reflected by the measurement target W and generates a light reception signal representing the amount of light received. And the texture illumination emitting unit 26.

  The stage 21 is a work table having a placement surface on which the measurement object W is placed. The stage 21 includes a disk-shaped stage plate 211 and a stage base 212 that supports the stage plate 211.

  The stage plate 211 can be bent and fixed in the vicinity of the center, and can function as an inclined table for causing the measuring object W to face the light receiving unit 25 directly. The stage holding unit 22 rotatably holds the stage 21 in order to adjust the imaging angle with respect to the measurement object W on the stage 21. The rotation drive unit 23 switches the imaging angle by rotating the stage 21.

  The light receiving unit 25 is a fixed-magnification camera that photographs the measurement object W on the stage 21, and includes a light receiving lens 251 and an image sensor 252. The imaging element 252 includes a large number of light receiving elements that receive the measurement light from the measurement object W via the light receiving lens 251 and generate a light reception signal representing the amount of light received, and a captured image is generated from the light reception signal. For example, an image sensor such as a CCD (Charge Coupled Device) or a CMOS (Complementary Metal Oxide Semiconductor) is used for the imaging element 252. The image sensor 252 is, for example, a monochrome image sensor.

  The light projecting unit 24 is an illumination device that irradiates the measurement object W on the stage 21 with measurement light, and includes a light source for light projection 241, a collector lens 242, a pattern generation unit 243, and a light projection lens 244. As the light source 241 for light projection, for example, an LED (light emitting diode) or a halogen lamp that generates monochromatic light is used. Since it is easy to correct chromatic aberration and the like, it is more advantageous to use a monochromatic light source 241 for light projection than to use a white light source. Also, since a shorter wavelength is advantageous for increasing the resolution of shape measurement, it is preferable to use a blue light source, for example, a blue LED as the light source 241 for projection. However, the wavelength at which the image sensor 252 can receive light with good S / N is selected.

  Note that when a light source 241 for monochromatic light, for example, blue, is used, if the image sensor 252 is a color image sensor, the light receiving element of RG cannot be used. The number will decrease. Therefore, when the pixel size and the number of pixels are the same, it is more advantageous to use a monochrome image sensor for the image sensor 252.

  Light emitted from the light source for light projection 241 enters the pattern generation unit 243 via the collector lens 242. Then, the measurement light emitted from the pattern generation unit 243 is applied to the measurement object W on the stage 21 through the light projection lens 244.

  The pattern generation unit 243 is a device for generating pattern light for structured illumination, and can switch between uniform measurement light and measurement light composed of a two-dimensional pattern. For example, a DMD (Digital Micromirror Device) or a liquid crystal panel is used for the pattern generation unit 243. The DMD is a display element in which a large number of minute mirrors are arranged in a two-dimensional manner and can be switched between a bright state and a dark state for each pixel by controlling the tilt of each mirror.

  Structured illumination methods for measuring the three-dimensional shape of the measuring object W using the principle of triangulation include a sine wave phase shift method, a multi-slit method, a spatial code method, and the like. The sine wave phase shift method is an illumination method in which a sine wave-like fringe pattern is projected onto the measurement object W, and a captured image is acquired each time the fringe pattern is moved at a pitch shorter than the period of the sine wave. The three-dimensional shape data is obtained by obtaining the phase value at each pixel from the luminance value of each captured image and converting it into height information.

  The multi-slit method is an illumination method for projecting a fine stripe pattern on the measurement object W and acquiring a captured image every time the stripe pattern is moved at a pitch narrower than the interval between the stripes. The three-dimensional shape data is obtained by obtaining the photographing timing of the maximum luminance in each pixel from the luminance value of each photographed image and converting it to height information.

  The spatial code method is an illumination method in which a black and white duty ratio is 50% with respect to the measurement target W and a plurality of fringe patterns having different fringe pattern widths are sequentially projected to obtain a captured image. Three-dimensional shape data is obtained by obtaining a code value in each pixel from the luminance value of each captured image and converting it into height information.

  The pattern generation unit 243 can generate the above-described stripe pattern as a two-dimensional pattern. In the three-dimensional measuring apparatus 1, three-dimensional shape data is acquired with high resolution and high accuracy by combining the multi-slit method and the spatial code method.

  In the three-dimensional measuring apparatus 1, the two light projecting units 24 are arranged symmetrically with the light receiving unit 25 interposed therebetween. The light projecting axes J2 and J3 of each light projecting unit 24 are inclined with respect to the light receiving axis J1 of the light receiving unit 25 in order to use the principle of triangulation. In the light projecting unit 24, the light projecting axes J2 and J3 are inclined by offsetting the light projecting lens 244 toward the light receiving axis J1 with respect to the optical axes of the light source 241 for light projection, the collector lens 242 and the pattern generation unit 243. I am letting. By adopting such a configuration, the measuring unit 2 can be downsized as compared with the case where the entire light projecting unit 24 is inclined.

  The texture illumination emitting unit 26 emits uniform illumination light composed of visible light for detecting the color or pattern of the measurement object W as surface texture information toward the measurement object W on the stage 21. The texture illumination emitting unit 26 is disposed so that the light projecting axis is substantially parallel to the light receiving axis J1 of the light receiving unit 25 and surrounds the light receiving lens 251 of the light receiving unit 25. For this reason, compared with the illumination from the light projection part 24, the shadow on the measuring object W is hard to be formed, and the blind spot at the time of imaging | photography decreases.

  The control board 27 processes a light receiving signal from the image sensor 252 of the control circuit that controls the rotation driving unit 23, the driving circuit that drives the light source 241 and the pattern generation unit 243 of the light projecting unit 24, and the light receiving unit 25. A circuit board provided with a processing circuit and the like.

<Controller 4>
The controller 4 is a control device for the measurement unit 2, and includes a texture light source 41 that generates illumination light for texture illumination, a control board 42 provided with a drive circuit for the texture light source 41, and the like in the measurement unit 2. And a power source 43 that supplies power to each device. For example, the texture light source 41 sequentially turns on illumination light of each color of R (red), G (green), and B (blue) in order to obtain a color texture image from the captured image. Since the image sensor 252 is a monochrome image sensor, color information cannot be acquired when acquiring texture information using a white light source as the texture light source 41. For this reason, the texture light source 41 switches illumination between RGB.

  If a monochrome texture image is sufficient, a white light source such as a white LED may be used as the texture light source 41, or a light source that simultaneously emits RGB monochromatic light may be used. In addition, a color image sensor may be used for the image sensor 252 when a reduction in measurement accuracy is allowed to some extent. The illumination light is transmitted to the texture illumination emission unit 26 of the measurement unit 2 via the light guide 3. The control board 42 and the power source 43 are connected to the control board 27 of the measurement unit 2.

<Information processing terminal 5>
The information processing terminal 5 is a terminal device that controls the measurement unit 2 and performs screen display of a captured image, registration of setting information for dimension measurement, generation of three-dimensional shape data, dimension calculation of the measurement target W, and the like. A display unit 51, a keyboard 52, and a mouse 53 are connected. The display unit 51 is a monitor device that displays captured images and setting information on a screen. The keyboard 52 and the mouse 53 are input devices on which a user performs operation input. This information processing terminal is a personal computer, for example, and is connected to the control board 27 of the measurement unit 2.

  FIG. 2 is an explanatory diagram schematically showing a configuration example of the measurement unit 2 of FIG. The measuring unit 2 includes a head unit 20 including two imaging units 25a and 25b having different shooting magnifications, a stage holding unit 22 that rotatably holds the stage 21 about a vertical rotation axis J4, and a head unit. 20 and a connecting portion 28 that connects the stage holding portion 22.

  The connecting unit 28 is configured such that the light projecting axes J2 and J3 of the light projecting unit 24 and the light receiving axes J11 and J12 of the image capturing units 25a and 25b are inclined with respect to the rotation axis J4. And are fixedly connected. For this reason, the relative positional relationship between the stage 21 and the imaging units 25a and 25b is constant, and it is easy to connect and synthesize point group data for a plurality of imaging angles with different rotation angles of the stage 21.

  The imaging unit 25a is a low-magnification light receiving unit 25. The imaging unit 25b is a light receiving unit 25 with a higher magnification than the imaging unit 25a. The imaging units 25a and 25b are arranged so that the light receiving axes J11 and J12 are inclined with respect to the rotation axis J4 of the stage 21 so that the three-dimensional shape data of the entire measurement object can be obtained. .

  For example, the inclination angle of the light receiving axes J11 and J12 with respect to the rotation axis J4 is about 45 °. Further, the imaging unit 25b is disposed below the imaging unit 25a so that the focal position FP is below the focal position FP of the imaging unit 25a on the rotation axis J4 of the stage 21, and the light receiving axis J12 receives light. It is substantially parallel to the axis J11.

  By adopting such a configuration, the measurable area R1 of the imaging unit 25a and the measurable area R2 of the imaging unit 25b can be appropriately formed on the stage 21. The measurable areas R1 and R2 are both cylindrical areas centering on the rotation axis J4 of the stage 21, and the measurable area R2 is formed in the measurable area R1.

  Steps S <b> 101 to S <b> 113 in FIG. 3 are flowcharts illustrating an example of an operation at the time of dimension measurement in the three-dimensional measurement apparatus 1. First, the three-dimensional measuring apparatus 1 photographs the measurement object W placed on the stage 21 by the light receiving unit 25 and displays the photographed image on the display unit 51 to adjust the brightness of the floodlight (step). S101). This brightness adjustment is performed by irradiating uniform measurement light from the light projecting unit 24 or irradiating measurement light composed of pattern light.

  Next, the three-dimensional measurement apparatus 1 switches to texture illumination, acquires a captured image, displays the captured image, and adjusts the brightness of the texture illumination by displaying on the display unit 51 (step S102). This brightness adjustment is performed by sequentially irradiating illumination light of each color of R (red), G (green), and B (blue) from the texture illumination emitting unit 26 or simultaneously. Step S101 and step S102 may be switched in order.

  The three-dimensional measuring apparatus 1 repeats the processing procedures of steps S101 and S102 until the illumination condition is determined. After the illumination condition is determined, if the user instructs the start of measurement (step S103), the light projecting unit 24 Pattern light is projected (step S104), and a pattern image is acquired (step S105). This pattern image is a captured image in which the measurement object W on the stage 21 is captured. Pattern light projection and captured image acquisition are performed by synchronizing the pattern generation unit 243 and the light receiving unit 25.

  Next, the three-dimensional measurement apparatus 1 switches to texture illumination and acquires a texture image (steps S106 and S107). This texture image is obtained by synthesizing a plurality of captured images obtained by sequentially irradiating illumination light of each color of R (red), G (green), and B (blue). At the time of connection measurement, the processing procedure from step S104 to step S107 is repeated while sequentially switching the stage 21 to a plurality of imaging angles designated in advance (step S108).

  Next, the three-dimensional measuring apparatus 1 analyzes the pattern image acquired in step S105 with a predetermined measurement algorithm, and generates three-dimensional shape data (step S109). In the three-dimensional shape data generation step, three-dimensional shape data obtained from a plurality of captured images with different imaging angles is synthesized as necessary. Then, the three-dimensional measuring apparatus 1 maps the texture image to the generated three-dimensional shape data (Step S110), and displays it on the display unit 51 as the three-dimensional shape of the measurement object W (Step S111).

  The three-dimensional measuring apparatus 1 repeats the processing procedure from step S101 to step S111 while changing the imaging angle, the imaging conditions, etc. until the three-dimensional shape data is obtained for the desired measurement location (step S112). When data is obtained and data analysis is instructed by the user, the data analysis of the three-dimensional shape data is performed by the application program for dimension measurement, and the dimension of the measuring object W is calculated (step S113).

  Steps S201 to S211 in FIG. 4 are flowcharts showing an example of detailed operations for step S101 (brightness adjustment of floodlight) in FIG. 3, and the operations of the three-dimensional measuring apparatus 1 are shown. First, the three-dimensional measuring apparatus 1 turns on the left light projecting unit 24 (step S201) and accepts brightness adjustment by the user (step S202).

  Next, the three-dimensional measuring apparatus 1 accepts the selection of the photographing magnification by the user, and switches to the corresponding imaging unit 25a or 25b when the photographing magnification is changed (step S203). At this time, if the desired measurement location is not illuminated, the coordinate measuring apparatus 1 adjusts the position and orientation of the measurement target W by rotating the stage 21 based on the user operation (step S204). , S205). The position and orientation may be adjusted by turning on the left and right light projecting units 24 simultaneously.

  And if the brightness of a measurement location is not appropriate, the three-dimensional measuring apparatus 1 accepts the brightness adjustment by the user again (steps S206 and S207). The three-dimensional measuring apparatus 1 repeats the processing procedure from step S203 to step S207 until the end of setting is instructed by the user (step S208).

  Next, when the user instructs the end of the setting, the three-dimensional measuring apparatus 1 registers the illumination condition specified by the user as setting information, switches to the right light projecting unit 24 (step S209), and is set by the user. Brightness adjustment is accepted (step S210). The three-dimensional measuring apparatus 1 repeats the processing procedure of step S210 until the end of setting is instructed by the user. If the end of setting is instructed by the user, the lighting condition specified by the user is registered as setting information. The process ends (step S211).

  Steps S301 to S313 in FIG. 5 are flowcharts showing an example of detailed operations in step S102 (brightness adjustment of texture illumination) in FIG. 3, and the operations of the three-dimensional measuring apparatus 1 are shown. First, the three-dimensional measuring apparatus 1 turns on texture illumination (step S301), and accepts brightness adjustment by the user (step S302). If the brightness of the measurement location is not appropriate (step S303), the three-dimensional measuring apparatus 1 repeats the processing procedure of step S302 and accepts the brightness adjustment by the user again.

  Next, the three-dimensional measuring apparatus 1 accepts the selection of the image quality of the texture image by the user (step S304). If the normal image quality is selected, the normal image quality is specified, and the illumination condition and the shooting condition specified by the user are specified. This is registered as setting information, and the process is terminated (step S313).

  On the other hand, if the full-focus image quality is selected by the user, the three-dimensional measuring apparatus 1 specifies the full-focus image quality (steps S305 and S306). The full focus image quality is an image quality obtained by the depth synthesis process, and by combining a plurality of captured images obtained while changing the focal position, an image in focus can be obtained in the entire image.

  Then, when the HDR (high dynamic range) image quality is selected by the user, the three-dimensional measuring apparatus 1 designates the HDR image quality (steps S307 and S308). As for HDR image quality, an image having a wide dynamic range can be obtained by synthesizing a plurality of photographed images acquired with different exposure times.

  Next, if the confirmation of the texture image is instructed by the user (step S309), the three-dimensional measuring apparatus 1 acquires a captured image based on the illumination condition and the imaging condition specified by the user (step S310), A texture image is created and displayed on the display unit 51 (step S311).

  The three-dimensional measuring apparatus 1 repeats the processing procedure from step S305 to step S311 until the setting end is instructed by the user, and if the setting end is instructed by the user, the illumination condition and the imaging condition specified by the user are set. This is registered as setting information, and this process ends (step S312).

  Steps S401 to S413 in FIG. 6 are flowcharts showing an example of detailed operations for step S113 (data analysis) in FIG. 3, and the operations of the three-dimensional measuring apparatus 1 are shown. First, the three-dimensional measuring apparatus 1 reads three-dimensional shape data in a predetermined data format based on a user operation, and displays the three-dimensional shape of the measurement object W on the display unit 51 (steps S401 and S402).

  Next, the three-dimensional measurement apparatus 1 performs preprocessing such as noise removal, hole filling, and unnecessary data deletion (step S403), and accepts display magnification and orientation adjustments by the user (step S404).

  Next, the three-dimensional measuring apparatus 1 accepts designation of a point group for extracting a geometric element at a measurement location on the three-dimensional shape being displayed (step S405). Then, the three-dimensional measurement apparatus 1 accepts designation of the shape type for the geometric element (step S406). Shape types include points, lines, circles, surfaces, spheres, cylinders, cones, and the like. Step S405 and step S406 may be switched in order.

  The three-dimensional measuring apparatus 1 repeats the processing procedure of steps S405 and S406 until the specification of the point group and the shape type is completed for all geometric elements (step S407), and if the specification of the point group and the shape type is completed. The selection of the geometric element by the user is accepted (step S408). Then, the three-dimensional measuring apparatus 1 accepts the selection of the dimension type for the selected geometric element (step S409). Dimension types include distance, angle, geometric tolerance, diameter, and the like. Step S408 and step S409 may be switched in order.

  Next, the three-dimensional measuring apparatus 1 specifies a geometric element by fitting a basic shape to a point group for the selected geometric element, and calculates a dimension value between the geometric elements (step S410). Next, the three-dimensional measuring apparatus 1 displays the dimension value in association with the measurement location on the three-dimensional shape of the measurement object W (step S411). The three-dimensional measuring apparatus 1 repeats the processing procedure from step S408 to step S411 if there are other desired measurement points (step S412), and outputs the measurement result if there are no other desired measurement points. This process ends (step S413).

  Next, a more detailed configuration of the three-dimensional measuring apparatus 1 according to the present invention will be described below with reference to FIGS.

<Information processing terminal 5>
FIG. 7 is a block diagram showing an example of a functional configuration in the information processing terminal 5 of FIG. The information processing terminal 5 includes a measurement control unit 10, a shape data generation unit 11, a shape data storage unit 12, a display control unit 13, a reference plane extraction unit 14, a posture change unit 15, a cutting line designation unit 16, and a cross-sectional profile acquisition unit. 17, a cross-section measuring unit 18, a geometric element extracting unit 19 a and an edge extracting unit 19 b.

  The measurement control unit 10 controls the rotation driving unit 23 based on a user operation with the keyboard 52 or the mouse 53 to adjust the imaging angle, and controls the irradiation of the measurement light by the light projecting unit 24.

  The shape data generation unit 11 generates solid shape data representing the three-dimensional shape of the measurement object W based on the light reception signal from the light receiving unit 25 and stores the solid shape data in the shape data storage unit 12. The three-dimensional shape data includes position information of a plurality of measurement points in a three-dimensional space, and is created from a plurality of pattern images acquired each time a fringe pattern projected as measurement light on the measurement object W is moved. The shape data storage unit 12 holds solid shape data measured in the past.

  The display control unit 13 controls the display unit 51 based on the solid shape data in the shape data storage unit 12 and displays the solid shape of the measurement target W on the measurement screen. For example, the three-dimensional shape is displayed on the measurement screen so that an object body in which a large number of measurement points are arranged three-dimensionally is viewed from a predetermined viewpoint. The position, viewpoint, and display magnification of the three-dimensional shape (object body) in the measurement screen can be arbitrarily specified.

  The reference plane extraction unit 14 specifies a reference plane for cutting the three-dimensional shape based on designation of the position with respect to the three-dimensional shape being displayed, and sets it as the reference plane. The designation of the position is performed based on a user operation with the keyboard 52 or the mouse 53, and a point group for extracting a plane as a geometric element is selected. The point group is composed of two or more measurement points, and the point group is selected by designating a figure surrounding the desired point group on the measurement screen, for example, a polygon, by a mouse operation or the like. In addition, by designating one position on the three-dimensional shape on the measurement screen by a mouse operation or the like, a point group that includes the position and fits on a plane is selected. Then, the reference plane is specified as the basic shape fitted to the selected point group.

  Conventionally known statistical methods can be used for fitting the basic shape to the point cloud. For example, the three-dimensional position, posture, and size of the geometric element are specified by the least square method based on the distance between the measurement points constituting the point group and the basic shape. The position information of the reference plane is stored in the shape data storage unit 12.

  Further, the reference plane extraction unit 14 determines a reference axis and a rotation center in the reference plane based on the shape of the reference plane. The extracted reference plane is a plane shape having a finite end because the point group is finite. For example, when the reference plane is substantially rectangular, a straight line parallel to the long side is designated as the reference axis, and the intersection of diagonal lines is designated as the rotation center. In addition, the reference plane extraction unit 14 sets a coordinate plane designated in advance for the three-dimensional shape as the reference plane. Similarly, for example, even if the extracted reference plane is not rectangular, the normal of the reference plane, the inertia principal axis of the reference plane extracted as the reference axis, and the coordinates where the center of gravity of the reference plane shape is specified as the rotation center The plane is the reference plane.

  The posture changing unit 15 rotates the three-dimensional shape so that the normal of the reference plane is orthogonal to the measurement screen in order to face the reference plane. In addition, the posture changing unit 15 rotates the three-dimensional shape so that the normal line of the reference plane is parallel to the vertical direction or the horizontal direction of the measurement screen in order to direct the reference plane in the vertical direction or the horizontal direction.

  The posture changing unit 15 rotates the three-dimensional shape so that the reference axis defined in the reference plane matches the vertical direction or the horizontal direction of the measurement screen. Further, when the reference plane is facing the reference plane, the posture changing unit 15 forms a straight line perpendicular to the measurement screen through the center of rotation defined in the reference plane based on a user operation with the keyboard 52 or the mouse 53. The solid shape is rotated as the center. In addition, when the reference plane is oriented in the vertical direction or the horizontal direction, the posture changing unit 15 rotates the three-dimensional shape around a straight line that passes through the rotation center defined in the reference plane and is perpendicular to the measurement screen.

  The cutting line designation unit 16 receives the designation of the cutting line in the measurement screen. The position information of the cutting line is stored in the shape data storage unit 12. The cutting line designation unit 16 determines the cutting line by designating a two-dimensional position on the measurement screen, for example. The designation of the two-dimensional position is performed based on a user operation using the keyboard 52 or the mouse 53. For example, a line segment connecting two positions designated by the user on the screen with a straight line is designated as a cutting line. The cutting line may be a broken line or a curved line.

  The cross-sectional profile acquisition unit 17 acquires a cross-sectional profile from the solid shape data in the shape data storage unit 12 and stores it in the shape data storage unit 12. The cross-sectional profile consists of shape data representing the shape of the cut surface when the three-dimensional shape after the posture is changed by being rotated is cut by a cutting line. The cut surface is a plane or curved surface perpendicular to the measurement screen.

  The cross-section measuring unit 18 performs dimension measurement based on the cross-sectional profile acquired by the cross-sectional profile acquiring unit 17. This dimension measurement is performed, for example, by designating the measurement location, the shape of the measurement element, and the dimension type for the cross-sectional profile displayed on the measurement screen. The measurement result of the dimension value is displayed superimposed on the cross-sectional profile being displayed on the measurement screen.

  The geometric element extraction unit 19a identifies a geometric element based on designation of a position with respect to the three-dimensional shape being displayed. The designation of the position is performed based on a user operation using the keyboard 52 or the mouse 53. The geometric element is specified by selecting a point group by designating a position and fitting a predetermined basic shape to the selected point group.

  The cutting line designation unit 16 determines a cutting line based on the projection position obtained by projecting the geometric element extracted by the geometric element extraction unit 19a onto the measurement screen. Specifically, if the geometric element is a plane, an intersection line between the plane and the measurement screen is designated as a cutting line. If the geometric element is a cylinder, a projected figure obtained by projecting the central axis of the cylinder onto the measurement screen, that is, a straight line is designated as a cutting line. In addition, a straight line created by reusing the intersection of the central axis of the cylinder and the reference plane (measurement screen) as a point and designating another point can be used as a cutting line.

  The edge extraction unit 19b extracts an edge from a projection image obtained by projecting a three-dimensional shape onto the measurement screen based on the designation of the position on the measurement screen. Edges are extracted based on luminance. Here, the projected image may be a distance image obtained by replacing the position along the projection direction of the three-dimensional shape data corresponding to the outermost surface along the projection direction, that is, the distance in the direction perpendicular to the measurement screen with luminance information. The texture image corresponding to the texture information of the three-dimensional shape data corresponding to the outermost surface along the projection direction may be used. The cutting line specifying unit 16 determines a cutting line based on the edge extracted by the edge extracting unit 19b. For example, a vertical straight line or a parallel straight line separated by a predetermined distance is designated as a cutting line with respect to a straight line fitted to a plurality of edge points. Further, concentric circles separated by a predetermined distance from the circle fitted to a plurality of edge points are designated as the cutting line.

<Measurement screen 6>
FIG. 8 is a diagram showing an example of the operation when setting the reference plane in the information processing terminal 5 of FIG. 7, and shows the measurement screen 6 displayed on the display unit 51. The measurement screen 6 is an operation screen for performing dimension measurement on a cut surface obtained by cutting a three-dimensional shape, and is displayed on the display unit 51 when a reference plane is set.

  The measurement screen 6 is provided with a three-dimensional shape display field 60 for displaying the three-dimensional shape of the measurement object W and an operation field 61 for designating a reference plane. The operation column 61 is arranged on the right side of the three-dimensional shape display column 60. In the operation column 61, a pull-down menu 62, a creation button 63, and a detailed setting button 64 are arranged.

  The pull-down menu 62 is an operation object for designating a reference plane using geometric elements extracted in the past. By operating this pull-down menu 62, the geometric elements extracted so far from the three-dimensional shape being displayed are displayed in a list. The geometric element selected from the pull-down menu 62 can be designated as the reference plane.

  The creation button 63 is an operation icon for newly creating a reference plane. If the click operation is performed with the mouse pointer 7 moved onto the creation button 63, the creation button 63 can be operated. The detail setting button 64 is an operation for rotating the solid shape so that the reference plane has a specific posture with respect to the measurement screen 6, or for designating a coordinate plane designated in advance for the solid shape as the reference plane. Icon.

  FIG. 9 is a diagram showing an example of the operation when the reference plane is set in the information processing terminal 5 of FIG. 7, and shows the measurement screen 6 after extracting the reference plane 8 from the three-dimensional shape being displayed. . The measurement screen 6 is a reference plane creation screen displayed when the creation button 63 is operated. The operation field 61 includes an element name input field, a display setting button, a designation method input field 65, and an OK button. 66 and a cancel button are arranged.

  An element name is automatically assigned to the newly created reference plane 8. Further, if the display setting button is operated, the display form of the reference plane 8, for example, the display color can be changed. The input field 65 is an operation object for selecting a method for specifying an area for extracting a reference plane, and a list of selectable specification methods is displayed as a pull-down menu.

  The area designation method includes a designation method by a click operation, a designation method by a combination of a key operation and a click operation, a designation method by a plurality of points, a designation method by a drag operation, and the like. In the method of specifying by the click operation, the plane at the position is automatically extracted as the reference plane 8 by performing the click operation with the position on the three-dimensional shape specified by the mouse pointer 7.

  The reference plane 8 extracted from the three-dimensional shape is displayed so as to be distinguishable from the extraction-source three-dimensional shape. For example, the reference plane 8 is colored in red and displayed superimposed on a three-dimensional shape. The reference plane 8 is a rectangular area. When the OK button 66 is operated, the reference plane 8 extracted from the three-dimensional shape is determined, and posture changing processing is performed to rotate the three-dimensional shape so that the reference plane 8 is in a specific posture with respect to the measurement screen 6.

  FIG. 10 is a diagram showing an example of the operation at the time of setting the reference plane in the information processing terminal 5 of FIG. 7, and shows the measurement screen 6 after the reference plane 8 is directly opposed. This measurement screen 6 is a reference plane setting screen that is displayed when the reference plane 8 is designated. In the three-dimensional shape display field 60, the reference plane 8 is rotated so that the reference plane 8 faces the measurement screen 6. A three-dimensional shape is displayed. Directly facing the measurement screen 6 of the reference plane 8 means that the normal line of the reference plane 8 is orthogonal to the measurement screen 6.

  The reference plane 8 has a rectangular shape having a long side 8a and a short side 8b, the long side 8a is designated as the reference axis, and the diagonal intersection 8c is designated as the rotation center. The three-dimensional shape in the three-dimensional shape display field 60 is arranged so that the reference plane 8 faces the measurement screen 6 and the reference axis of the reference plane 8 matches the horizontal direction of the measurement screen 6. Further, the three-dimensional shape is arranged so that the center of rotation of the reference plane 8 is positioned approximately at the center of the three-dimensional shape display column 60. By adopting such a configuration, it is possible to improve the appearance when the three-dimensional shape is rotated so that the reference plane 8 is in a specific posture with respect to the measurement screen 6.

  The operation field 61 includes an input field 67 for a designated surface, an inversion box, an input field for a rotation angle, and a coordinate plane designation field. The input column 67 is an operation object for designating the orientation of the reference plane 8, and one of the xy plane, the yz plane, and the zz plane can be selected from a pull-down menu.

  Here, the measurement screen 6 is designated on the xy plane, the horizontal direction is the x axis, and the vertical direction is the y axis. If the yz plane is designated as the designated plane, the solid shape is rotated so that the reference plane 8 is parallel to the yz plane. If the zx plane is designated as the designated plane, the three-dimensional shape is rotated so that the reference plane 8 is parallel to the zx plane.

  The inversion box is an input field for inverting the reference plane 8, and by inputting a check mark, the three-dimensional shape can be rotated so that the front and back of the reference plane 8 are inverted. The rotation angle input field is an input field for rotating the three-dimensional shape around a straight line perpendicular to the measurement screen 6. The rotation angle is designated by incrementing or decrementing a numerical value or moving a slider.

  When the xy plane is designated as the designated plane, the three-dimensional shape can be rotated around a straight line that passes through the rotation center of the reference plane 8 and is perpendicular to the measurement screen 6. By adopting such a configuration, it is possible to improve the appearance when the three-dimensional shape is rotated so that the reference plane 8 is in a specific posture with respect to the measurement screen 6.

  FIG. 11 is a diagram showing an example of the operation when the reference plane is set in the information processing terminal 5 of FIG. 7, and shows the measurement screen 6 when the reference plane 8 is oriented in the horizontal direction. This measurement screen 6 is a setting screen when the yz plane is designated as the designated surface. In the three-dimensional shape display column 60, the normal of the reference plane 8 is rotated so that it is parallel to the horizontal direction of the measurement screen 6. The three-dimensional shape after being displayed is displayed.

  In this case, the long side 8a of the reference plane 8 is designated as the reference axis. The three-dimensional shape in the three-dimensional shape display column 60 is arranged so that the normal line of the reference plane 8 is parallel to the horizontal direction of the measurement screen 6 and the reference axis of the reference plane 8 is coincident with the vertical direction of the measurement screen 6. Is done. Further, the three-dimensional shape is arranged so that the intersection point 8 c of the reference plane 8 is located at the approximate center of the three-dimensional shape display field 60. If the rotation angle is designated, the three-dimensional shape can be rotated around a straight line that passes through the intersection 8c and is perpendicular to the measurement screen 6.

  FIG. 12 is a diagram showing an example of the operation when the reference plane is set in the information processing terminal 5 of FIG. 7, and shows the measurement screen 6 when the reference plane 8 is oriented in the vertical direction. This measurement screen 6 is a setting screen when the zx plane is designated as the designated surface, and the three-dimensional shape display column 60 is rotated so that the normal line of the reference plane 8 is parallel to the vertical direction of the measurement screen 6. The three-dimensional shape after being displayed is displayed.

  Also in this case, the long side 8a of the reference plane 8 is designated as the reference axis. The three-dimensional shape of the three-dimensional shape display field 60 is arranged so that the normal line of the reference plane 8 is parallel to the vertical direction of the measurement screen 6 and the reference axis of the reference plane 8 matches the horizontal direction of the measurement screen 6. Is done. Further, the three-dimensional shape is arranged so that the intersection point 8 c of the reference plane 8 is located at the approximate center of the three-dimensional shape display field 60. If the rotation angle is designated, the three-dimensional shape can be rotated around a straight line that passes through the intersection 8c and is perpendicular to the measurement screen 6.

  FIG. 13 is a diagram showing an example of an operation at the time of cross-section measurement in the information processing terminal 5 of FIG. 7, and shows a measurement screen 9 displayed on the display unit 51. The measurement screen 9 is an operation screen for performing dimension measurement on a cut surface obtained by cutting a three-dimensional shape, and is displayed on the display unit 51 during cross-section measurement.

  The measurement screen 9 includes a three-dimensional display column 91, a projection image display column 92, a cross-sectional profile display column 95, and operation columns 96 and 97. The display fields 91 and 92 and the operation field 96 are arranged in the upper part of the measurement screen 9, and the display field 95 and the operation field 97 are arranged in the lower part. The display column 91 is arranged on the left side of the display column 92, and the operation column 96 is arranged on the right side of the display column 92. The operation column 97 is arranged on the right side of the display column 95.

  In the display column 91, the three-dimensional shape of the measuring object W is displayed. For example, the three-dimensional shape after extracting the reference plane 8 is displayed. The display field 92 is a display field for displaying a projection image obtained by projecting a three-dimensional shape onto the measurement screen 9, and the projection image is rotated so that the reference plane 8 is in a specific posture with respect to the measurement screen 9. Created from a later three-dimensional shape. For example, a projection image corresponding to the three-dimensional shape after being rotated so that the normal line of the reference plane 8 is parallel to the vertical direction of the measurement screen 6 is displayed.

  In the operation column 96, a tool button for designating the cutting line 93 and a deletion button for deleting the cutting line 93 are arranged. By operating the tool button, it is possible to designate a cutting line 93 for acquiring a cross-sectional profile for the projection image being displayed in the display field 92. The cutting line 93 is a one-dimensional geometric figure in the measurement screen 9.

  The designation method selectable by the tool button includes a line segment, a vertical line, a horizontal line, a straight line, a perpendicular line, a parallel line, a circle, a concentric circle, a corner, an arc, and a broken line. For example, in the designation method using line segments, a line segment connecting these two points with a straight line is designated as the cutting line 93 by designating two points on the projection image. In the designation method using the vertical line, by specifying one point on the projection image, a vertical line (y direction) passing through this point is designated as the cutting line 93.

  In the three-dimensional shape of the display column 91, a shape line 94 indicating the position of the cut surface when the three-dimensional shape is cut by the cutting line 93 is displayed. The display column 95 is a display column for displaying a cross-sectional profile representing the shape of the cut surface when the three-dimensional shape is cut by the cutting line 93. The vertical direction of the display column 95 corresponds to the direction along the cutting line 93, and the horizontal direction of the display column 95 corresponds to the direction perpendicular to the measurement screen 9. When a line segment is designated as the cutting line 93, a plane that includes the designated line segment and extends in a direction perpendicular to the measurement screen 9 becomes the cut surface. Further, when a circle is designated as the cutting line 93, a cylindrical surface that includes the designated circle and extends in a direction perpendicular to the measurement screen 9 becomes the cut surface. In this case, the vertical direction of the display column 95 corresponds to the direction along the cutting line 93, that is, the circumferential direction of the designated circle. When a broken line is designated as the cutting line 93, the vertical direction of the display column 95 corresponds to the direction along the cutting line 93, that is, the direction along the designated broken line. Here, an example in which the vertical direction of the display column 95 corresponds to the direction along the cutting line 93 and the horizontal direction of the display column 95 corresponds to the direction perpendicular to the measurement screen 9 has been described. The relationship may be switched, and the direction along the cutting line 93 and the direction perpendicular to the measurement screen 9 may correspond to an arbitrary direction in the display field 95.

  By specifying the cutting line 93 for the projection image when the reference plane 8 is directly opposed to the measurement screen 9, the solid shape is cut by a plane and / or curved surface perpendicular to the reference plane 8. On the other hand, the solid shape can be cut along a plane parallel to the reference plane 8 by designating the cutting line 93 with respect to the projected image when the reference plane 8 is oriented in the vertical or horizontal direction of the measurement screen 9. .

  In the operation column 97, a tool button for designating a dimension type and a delete button for deleting a dimension value or a dimension line are arranged. By operating the tool button, the dimension type can be specified, and the dimension measurement can be performed on the cross-sectional profile displayed in the display field 95.

  The dimension types that can be selected with the tool button include line-line, line-point, point-point, height, circle-circle, circle-line, circle-point, arc, angle, curvature, area, length, and circle. There is. For example, in the case of a line-line, by specifying two line segments as measurement elements, the distance between these line segments is obtained as a dimension value. With respect to the angle, by designating two line segments as measurement elements, the angle formed by these line segments is obtained as a dimension value.

  The measurement value obtained by performing dimension measurement on the cross-sectional profile is displayed in association with the measurement location. In this example, dimension measurement is performed for three measurement locations, and the measurement values are displayed.

  FIG. 14 is a diagram illustrating an example of an operation at the time of cross-section measurement in the information processing terminal 5 in FIG. 7, in which a cutting line 93 is designated using a geometric element extracted from a three-dimensional shape. A geometric element list 98 is displayed in the operation field 96 of the measurement screen 9. The geometric element list 98 includes one or more geometric elements extracted from the three-dimensional shape, and the cutting line 93 can be designated using the geometric elements. The cutting line 93 is determined based on the projected figure obtained by projecting the geometric element onto the measurement screen 9.

  For example, if the conical surface and the cylindrical surface are extracted as geometric elements, a straight line connecting a point where the central axis of the conical surface intersects the measurement screen 9 and a point where the central axis of the cylindrical surface intersects the measurement screen 9 Is designated as the cutting line 93. In the display column 95, the shape of the cut surface when the three-dimensional shape is cut by the cutting line 93 is displayed as a cross-sectional profile. If the cutting line 93 is specified using the geometric element extracted from the three-dimensional shape, it is possible to cut the three-dimensional shape using a surface that is not visible in the projection image or a portion where it is difficult to extract the edge.

  FIG. 15 is a diagram showing an example of the operation when the report file is output in the information processing terminal 5 of FIG. 7, and shows a report screen 100 displayed on the display unit. The report screen 100 is an editing screen for recording or printing the result of the cross-sectional measurement as a report file, and is a 3D image display field, a 2D image display field, a cross-sectional profile display field, and a measurement result display field. Is provided.

  The three-dimensional shape of the measurement object W is displayed in the 3D image display field, and the projection image obtained by projecting the three-dimensional shape onto the measurement screen 9 is displayed in the 2D image display field. In the display section of the cross-sectional profile, the shape of the cut surface when the three-dimensional shape is cut by the cutting line 93 is displayed as a cross-sectional profile. In the measurement result display column, a list of dimensional measurement results for the cross-sectional profile is displayed.

  Steps S501 to S512 in FIG. 16 are flowcharts illustrating an example of an operation during cross-sectional measurement in the information processing terminal 5 in FIG. First, the information processing terminal 5 designates the reference plane 8 for the three-dimensional shape displayed as a 3D image on the measurement screen 9 (step S501), and the reference plane 8 takes a specific posture with respect to the measurement screen 9. Thus, the three-dimensional shape is rotated (step S502).

  Next, the information processing terminal 5 projects the rotated three-dimensional shape on the measurement screen 9 to obtain a projection image, and displays it as a 2D image on the measurement screen 9 (step S503). If the user operation for changing the designated surface is performed, the information processing terminal 5 repeats the processing procedure of steps S502 and S503 (step S504). When a user operation for changing the designated surface is performed, the orientation of the reference plane 8 is changed based on the user operation. On the other hand, when the user operation for changing the designated surface is not performed, the three-dimensional shape is rotated so that the xy plane is automatically designated as the designated surface and the reference plane 8 faces the measurement screen 9.

  Next, when a user operation for changing the rotation angle is performed (Step S505), the information processing terminal 5 displays the projection image around the z axis, that is, around the axis perpendicular to the measurement screen 9, based on the user operation. To adjust the angle (step S506).

  Next, when the cutting line 93 is designated on the measurement screen 9 (step S507), the information processing terminal 5 acquires a cross-sectional profile representing the shape of the cut surface when the solid shape is cut by the cutting line 93 ( In step S508, the image is developed on a plane and displayed on the measurement screen 9 (step S509). The information processing terminal 5 performs dimension measurement on the cross-sectional profile (step S510), and displays the measurement result superimposed on the cross-sectional profile (step S511). The information processing terminal 5 repeats the processing procedure of steps S510 and S511 if other measurement locations are specified, and ends the processing when the dimension measurement is completed for all measurement locations (step S512).

  According to the present embodiment, since the reference plane 8 has a specific posture with respect to the measurement screen 9, how to obtain a desired cut surface as a cut surface when the three-dimensional shape is cut by the cutting line 93 is It is possible to intuitively understand where to cut with a simple cutting line. In addition, the cutting line 93 is a one-dimensional geometric figure in the measurement screen 9, and the cutting plane is perpendicular to the measurement screen 9. Therefore, when the two-dimensional cutting plane is directly specified in the three-dimensional space. Compared to the above, the designation of the cut surface can be facilitated. Furthermore, since dimension measurement is performed based on a cross-sectional profile by a desired cut surface, it is possible to intuitively specify a measurement location, a shape of a measurement element, and a dimension type. Moreover, the dimension measurement of the location described in the design drawing can be easily performed.

  In the present embodiment, an example in which the head unit 20 includes one light receiving unit 25 and two light projecting units 24 has been described. However, the present invention limits the configuration of the head unit 20 to this. is not. For example, the present invention can be applied to a case where the head unit includes one light receiving unit 25 and one light projecting unit 24, or when the head unit includes two light receiving units 25 and one light projecting unit 24. is there.

  In the present embodiment, an example in which the head unit 20 and the stage holding unit 22 are fixedly connected has been described. However, the head unit 20 and the stage holding unit 22 may be separable.

DESCRIPTION OF SYMBOLS 1 3D measuring apparatus 2 Measurement part 20 Head part 21 Stage 211 Stage plate 212 Stage base 22 Stage holding part 23 Rotation drive part 24 Light projection part 25 Light-receiving part 25a, 25b Imaging part 26 Texture illumination emission part 27 Control board 28 Connection part 3 Light Guide 4 Controller 41 Texture Light Source 42 Control Board 43 Power Supply 5 Information Processing Terminal 51 Display Unit 52 Keyboard 53 Mouse 6, 9 Measurement Screen 7 Mouse Pointer 8 Reference Plane 10 Measurement Control Unit 11 Shape Data Generation Unit 12 Shape Data Storage Unit 13 Display control unit 14 Reference plane extraction unit 15 Attitude change unit 16 Cutting line designation unit 17 Section profile acquisition unit 18 Section measurement unit 19a Geometric element extraction unit 19b Edge extraction unit J1, J11, J12 Light receiving axis J2, J3 Light projection axis J4 Rotation Axis W Object to be measured

Claims (6)

Shape data generating means for measuring position information of a plurality of measurement points in a three-dimensional space and generating solid shape data representing the solid shape of the measurement object;
Shape data display means for displaying the three-dimensional shape on a measurement screen based on the three-dimensional shape data;
A reference plane extracting means for specifying a reference plane based on designation of a position with respect to the three-dimensional shape being displayed;
Posture changing means for rotating the three-dimensional shape so that the normal of the reference plane is orthogonal to the measurement screen or parallel to the vertical or horizontal direction of the measurement screen;
Cutting line designation means for receiving designation of the cutting line in the measurement screen;
A cross-sectional profile acquisition means for acquiring a cross-sectional profile representing the shape of the cut surface when the three-dimensional shape after rotation is cut by the cutting line;
A three-dimensional measuring apparatus comprising: a cross-sectional measuring means for measuring dimensions based on the cross-sectional profile. The reference plane extracting means determines a reference axis in the reference plane based on the shape of the reference plane,
The three-dimensional measuring apparatus according to claim 1, wherein the posture changing unit rotates the three-dimensional shape so that the reference axis coincides with a vertical direction or a horizontal direction of the measurement screen.   The three-dimensional measuring apparatus according to claim 1, wherein the cutting line designating unit determines the cutting line by designating a two-dimensional position on the measurement screen. Further comprising a geometric element extracting means for specifying a geometric element based on designation of a position with respect to the three-dimensional shape being displayed;
The three-dimensional measuring apparatus according to claim 1, wherein the cutting line designating unit determines the cutting line based on a projection position obtained by projecting the geometric element onto the measurement screen. An edge extracting means for extracting an edge from a projection image obtained by projecting the three-dimensional shape after rotation onto the measurement screen;
The three-dimensional measuring apparatus according to claim 1, wherein the cutting line designating unit determines the cutting line based on the edge. The reference plane extraction means determines a rotation center in the reference plane based on the shape of the reference plane,
The said attitude | position change means rotates the said three-dimensional shape centering | focusing on the straight line perpendicular | vertical to the said measurement screen through the said rotation center based on user operation. Three-dimensional measuring device.

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