JP2018031746A - Three-dimensional measurement device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a three-dimensional measurement device with which it is possible to objectively understand the degree and position of deviation.SOLUTION: The three-dimensional measurement device comprises: three-dimensional shape display means 503 for displaying a measurement three-dimensional shape image and a reference three-dimensional shape image on measurement screen; geometrical element extraction means 504 for specifying a first geometrical element and a second geometrical element on the basis of designation of a position in the measurement three-dimensional shape image and reference three-dimensional shape image being displayed; relative position change means 505 for changing the relative positions of measurement three-dimensional shape data and reference three-dimensional shape data so that the first geometrical element and the second geometrical element will match; profile acquisition means 506 for acquiring a measurement section profile and a reference section profile that represent a cross-sectional shape when the measurement three-dimensional shape and the reference three-dimensional shape respectively are cut at a cut section, on the basis of the measurement three-dimensional shape data and reference three-dimensional shape data after change of the relative positions; and profile display means 508 for displaying the measurement section profile and the reference section profile by superposition on the measurement screen.SELECTED DRAWING: Figure 17

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.

  When comparing three-dimensional shapes obtained by measurement, or comparing three-dimensional shapes obtained by measurement and three-dimensional shapes created using CAD (Computer Aided Design), these three-dimensional shapes are superimposed on the screen. Can be displayed. However, in such a display, since the information of the three-dimensional spread is compressed into the two-dimensional information, it is difficult to objectively understand where and how much deviation has occurred.

  In addition, since the three-dimensional shape is represented by a two-dimensional geometric figure by acquiring and displaying the cross-sectional shape when the three-dimensional shape is cut by the cut surface, the degree and position of the deviation occurring between the three-dimensional shapes Can be objectively understood. However, since the position and orientation of the measurement object change from measurement to measurement, the positions and orientations of the two three-dimensional shapes whose shapes are to be compared do not match. For this reason, there is a problem that it is difficult to obtain a cross-sectional shape by cutting three-dimensional shapes having different positions and postures in the same manner.

  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 that can objectively understand the degree and position of deviation. In particular, it is an object of the present invention to provide a three-dimensional measuring apparatus capable of obtaining a cross-sectional shape by cutting in the same way even if the solid shape has a different position and orientation immediately after display.

  The three-dimensional measuring apparatus according to the first aspect of the present invention measures shape information of a plurality of measurement points in a three-dimensional space, and generates measurement solid shape data representing a three-dimensional shape of the measurement object; Shape data storage means for holding reference solid shape data as a reference when comparing shapes, a measurement solid shape image corresponding to the measurement solid shape data, and a reference solid shape image corresponding to the reference solid shape data The first geometric element is specified based on the three-dimensional shape display means to be displayed on the measurement screen and the designation of the position with respect to the measured three-dimensional shape image being displayed. Two geometric element extraction means for specifying two geometric elements, and the measured three-dimensional shape data and the reference three-dimensional shape data so that the first geometric element and the second geometric element coincide with each other. The relative position changing means for changing the relative position of the measurement, and the measurement cross section representing the cross-sectional shape when the measurement solid shape is cut by the cut surface based on the measurement solid shape data and the reference solid shape data after the change of the relative position A profile acquisition unit that acquires a profile and acquires a reference cross-sectional profile that represents a cross-sectional shape when the reference solid shape is cut by the cut surface, and the measurement cross-sectional profile and the reference cross-sectional profile are superimposed and displayed on the measurement screen. Profile display means.

  According to such a configuration, the relative position can be changed by specifying the first geometric element and the second geometric element by designating the position with respect to the measured stereoscopic shape image and the reference stereoscopic shape image being displayed. Therefore, the positions and postures of the measurement solid shape and the reference solid shape can be matched. For this reason, even if it is a three-dimensional shape from which a position and a posture differ immediately after display, it can cut similarly and can acquire a section shape. In addition, since the measurement solid shape and the reference solid shape are represented by two-dimensional geometric figures as the measurement cross-sectional profile and the reference cross-sectional profile, respectively, it is necessary to objectively understand the degree and position of the deviation between the three-dimensional shapes. Can do.

  The three-dimensional measurement apparatus according to the second aspect of the present invention further includes profile comparison means for calculating a difference value between the measurement cross-sectional profile and the reference cross-sectional profile in addition to the above-described configuration, and the profile display means includes the measurement The difference value is displayed in association with the cross-sectional profile or the reference cross-sectional profile. According to such a configuration, it is possible to more objectively understand the degree of displacement, the position, and the polarity of displacement generated between three-dimensional shapes.

  In the three-dimensional measurement apparatus according to the third aspect of the present invention, in addition to the above configuration, the profile display means colors the region between the measurement cross-sectional profile and the reference cross-sectional profile according to the polarity of the difference value. Configured. According to such a structure, the visibility with respect to the polarity of the shift | offset | difference which has arisen between three-dimensional shapes can be improved.

  The three-dimensional measurement apparatus according to the fourth aspect of the present invention further includes attention area designating means for designating an attention area for the measurement cross-sectional profile and the reference cross-sectional profile being displayed, in addition to the above-described configuration, and the profile display The means is configured to display a graph that changes according to the difference value so as to be superimposed on the measured cross-sectional profile or the reference cross-sectional profile in the region of interest. According to such a configuration, since the shift in the attention area is emphasized by the graph, it is possible to prevent the level of the shift from being determined based on the display magnification of the cross-sectional profile.

  In the three-dimensional measuring apparatus according to the fifth aspect of the present invention, in addition to the above configuration, the relative position changing means uses the first geometric element and the second geometric element, which are specified in sequence, as a geometric element for alignment. If the relative position is changed so that these geometric elements are matched, and the first geometric element and the second geometric element are sequentially identified again after the relative position is changed, these geometric elements are also Change the relative position so that they match.

  According to such a configuration, the accuracy of alignment between the measurement solid shape and the reference solid shape can be improved by sequentially specifying the first geometric element and the second geometric element again after the relative position is changed. it can.

  In addition to the above configuration, the three-dimensional measurement apparatus according to the sixth aspect of the present invention includes a reference plane designating unit that designates a reference plane for the measurement solid shape or the reference solid shape after changing the relative position, and the reference Posture changing means for changing the posture of the measurement solid shape and the reference solid shape so that the normal line of the plane is orthogonal to the measurement screen or parallel to the vertical direction or the horizontal direction of the measurement screen; Cutting line designation means for receiving designation of a cutting line in the measurement screen, and the profile acquisition means uses the surface perpendicular to the measurement screen including the cutting line as the cutting surface, and the measurement after posture change The three-dimensional shape and the reference three-dimensional shape are cut by the cut surface to obtain the measurement cross-sectional profile and the reference cross-sectional profile.

  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. 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 measurement apparatus according to the seventh aspect of the present invention, in addition to the above configuration, the reference plane designating unit is configured to extract the second from the plane extracted from the measurement solid shape as the first geometric element or the reference solid shape. A plane extracted as a geometric element is configured to be designated as the reference plane. According to such a configuration, the trouble of newly designating the reference plane can be saved.

  The three-dimensional measuring apparatus according to the eighth aspect of the present invention further includes a cross-sectional measuring unit that performs dimension measurement based on designation of a position with respect to the measured cross-sectional profile being displayed, in addition to the above configuration, and the profile display unit The dimension measurement result is displayed in association with the measurement cross-sectional profile.

  According to such a configuration, since the dimension measurement is performed based on the measurement cross-sectional profile by a desired cut surface, it is possible to intuitively specify the measurement location, the shape of the measurement element, and the dimension type. Moreover, the dimension measurement of the location described in the design drawing can be easily performed.

  According to the present invention, since the positions and postures of the measurement solid shape and the reference solid shape are made to coincide, even if the solid shapes have different positions and postures immediately after display, the cross-sectional shape can be obtained by cutting in the same manner. . Therefore, it is possible to provide a three-dimensional measuring apparatus that can objectively understand the degree and position of deviation.

It is the system figure which showed one structural example of the three-dimensional measuring apparatus 1 by Embodiment 1 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. It is the block diagram which showed one structural example of the three-dimensional measuring apparatus 1 by Embodiment 2 of this invention, and the information processing terminal 500 which has a cross-section comparison function is shown. FIG. 18 is a diagram illustrating an example of an operation at the time of alignment in the information processing terminal 500 in FIG. 17, in which an alignment screen 300 displayed on the display unit 51 is illustrated. It is the figure which showed an example of the operation | movement at the time of the alignment in the information processing terminal 500 of FIG. 17, and the state after extracting the 1st geometric element 310 from measurement data is shown. It is the figure which showed an example of the operation | movement at the time of the alignment in the information processing terminal 500 of FIG. 17, and the state after extracting the 2nd geometric element 311 from reference | standard data is shown. It is the figure which showed an example of the operation | movement at the time of the alignment in the information processing terminal 500 of FIG. 17, and the state after the alignment completion by the 1st set of geometric elements is shown. FIG. 18 is a diagram illustrating an example of an operation at the time of cross-sectional comparison in the information processing terminal 500 of FIG. 17, and a measurement screen 320 displayed on the display unit 51 is illustrated. FIG. 18 is a diagram illustrating an example of an operation at the time of cross-sectional comparison in the information processing terminal 500 in FIG. 17, and a profile selection screen 328 displayed on the measurement screen 320 is illustrated. FIG. 18 is a diagram showing an example of an operation at the time of cross-sectional comparison in the information processing terminal 500 of FIG. FIG. 18 is a diagram illustrating an example of an operation at the time of cross-sectional comparison in the information processing terminal 500 of FIG. 17, in which the display magnification of the cross-sectional profile 312 is increased. It is the figure which showed an example of the operation | movement at the time of the cross section comparison in the information processing terminal 500 of FIG. 17, and the case where the graph which changes according to a difference value is displayed 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 500 of FIG. 18 is a flowchart showing an example of an operation at the time of cross-sectional comparison in the information processing terminal 500 of FIG. 18 is a flowchart showing an example of an operation at the time of cross-sectional comparison in the information processing terminal 500 of FIG.

Embodiment 1 FIG.
First, a schematic configuration of the three-dimensional measuring apparatus according to Embodiment 1 of 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 Embodiment 1 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 the light state and the dark state can be switched 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 first embodiment of 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 designating unit 16 determines a cutting line based on, for example, designation of a line segment on the measurement screen. The line segment is specified based on a user operation using the keyboard 52 or the mouse 53. For example, a line segment connecting two positions specified by the user on the screen with a straight line is specified as a cutting 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.

Embodiment 2. FIG.
In the first embodiment, an example in which the information processing terminal 5 has a cross-sectional measurement function of acquiring a cross-sectional profile from solid shape data and performing dimension measurement has been described. In this embodiment, a case where the information processing terminal has a cross-sectional comparison function will be described.

  FIG. 17 is a block diagram showing a configuration example of the three-dimensional measuring apparatus 1 according to the second embodiment of the present invention, and shows an information processing terminal 500 having a cross-sectional comparison function. The cross-sectional comparison function is a function that compares two cross-sectional profiles, obtains the degree and position of deviation, and displays them on the measurement screen.

  The information processing terminal 500 includes a shape data generation unit 501, a shape data storage unit 502, a three-dimensional shape display unit 503, a geometric element extraction unit 504, a relative position change unit 505, a profile acquisition unit 506, a profile storage unit 507, and a profile display unit. 508, a profile comparison unit 509, a region of interest designation unit 510, a reference plane designation unit 511, a posture change unit 512, a cutting line designation unit 513, and a cross-section measurement unit 514.

  The shape data generation unit 501 measures the three-dimensional shape of the measurement object W, generates measurement three-dimensional shape data, and stores it in the shape data storage unit 502. The shape data storage unit 502 stores reference solid shape data that serves as a reference when comparing shapes. For the reference three-dimensional shape data, for example, CAD data created using CAD can be used. In addition, you may use the solid shape data acquired by measuring a master piece, or the solid shape data measured in the past as reference | standard solid shape data.

  The three-dimensional shape display unit 503 reads the measurement three-dimensional shape data and the reference three-dimensional shape data from the shape data storage unit 502 and controls the display unit 51 to measure the three-dimensional shape image representing the measured three-dimensional shape and the reference three-dimensional shape representing the reference three-dimensional shape. The shape image is displayed on the measurement screen. The measurement stereoscopic shape image is created based on the measurement stereoscopic shape data. On the other hand, the reference stereoscopic shape image is created based on the reference stereoscopic shape data.

  The geometric element extraction unit 504 extracts the first geometric element and the second geometric element to be used for alignment from the measurement solid shape and the reference solid shape, respectively. The first geometric element is specified based on the designation of the position with respect to the measurement stereoscopic shape image being displayed. On the other hand, the second geometric element is specified based on the designation of the position with respect to the reference three-dimensional shape image being displayed. The designation of the position is performed based on a user operation using the keyboard 52 or the mouse 53.

  The relative position changing unit 505 changes the relative positions of the measurement solid shape data and the reference solid shape data so that the first geometric element and the second geometric element coincide with each other. That is, the position information is converted so that the first geometric element on the measurement solid shape and the second geometric element on the reference solid shape overlap in the space and the position and orientation match. For example, coordinate conversion is performed on either the measured three-dimensional shape data or the reference three-dimensional shape data in the shape data storage unit 502. In addition, you may perform coordinate conversion about both measurement solid shape data and reference | standard solid shape data.

  The relative position changing unit 505 associates the first geometric element and the second geometric element that are sequentially specified as a geometric element for alignment, and changes the relative position so that these geometric elements coincide with each other. Then, if the first geometric element and the second geometric element are sequentially identified again after the relative position is changed, the relative position changing unit 505 changes the relative position so that these geometric elements also coincide.

  The profile acquisition unit 506 cuts the reference cross-sectional shape and the measurement cross-sectional profile representing the cross-sectional shape when the measurement solid shape is cut by the cut surface based on the measurement solid shape data and the reference solid shape data after the change of the relative position. A reference cross-sectional profile representing a cross-sectional shape when cut by a plane is acquired. The measured cross-sectional profile and the reference cross-sectional profile are stored in the profile storage unit 507.

  The profile display unit 508 reads profile data from the profile storage unit 507, controls the display unit 51, and displays the measurement cross-sectional profile and the reference cross-sectional profile on the measurement screen.

  The profile comparison unit 509 reads and compares the measured cross-sectional profile and the reference cross-sectional profile from the profile storage unit 507, and calculates a difference value between the measured cross-sectional profile and the reference cross-sectional profile. The difference value represents a deviation between the measured cross-sectional profile and the reference cross-sectional profile, and is obtained, for example, as a distance from the reference cross-sectional profile to the measured cross-sectional profile in the normal direction of the reference cross-sectional profile.

  The attention area designation unit 510 displays a difference value or designates an attention area for emphasizing a shift with respect to the measured cross-sectional profile and the reference cross-sectional profile being displayed. The region of interest can be specified by specifying the position on the measurement cross-sectional profile and the reference cross-sectional profile by a mouse operation or the like.

  The difference value is calculated for the measured cross-sectional profile and the reference cross-sectional profile in the region of interest. For example, the maximum difference value or the average difference value is calculated. The maximum difference value is the maximum difference value in the attention area. The average difference value is an average value of the difference values in the attention area.

  The profile display unit 508 displays the difference value in association with the measured cross-sectional profile or the reference cross-sectional profile. Further, the profile display unit 508 colors the region between the measurement cross-sectional profile and the reference cross-sectional profile according to the polarity of the difference value. For example, the display color of the area is different between the area where the difference value is positive and the area where the difference value is negative. The display of the difference value and the coloring between the cross-sectional profiles are performed for the measurement cross-sectional profile and the reference cross-sectional profile in the region of interest. Also, the profile display unit 508 displays a graph that changes according to the difference value by superimposing the graph on the measurement cross-sectional profile or the reference cross-sectional profile in the region of interest.

  The reference plane designating unit 511 designates, as the reference plane, a reference plane for cutting the three-dimensional shape with respect to the measured three-dimensional shape or the reference three-dimensional shape after the relative position is changed. For the reference plane, for example, a plane extracted as the first geometric element from the measurement solid shape or a plane extracted as the second geometric element from the reference solid shape is designated. The reference plane may be designated by newly extracting a plane from the measurement solid shape or the reference solid shape.

  The posture changing unit 512 changes the posture of the measurement solid shape and the reference solid shape so that the normal line of the reference plane is orthogonal to the measurement screen in order to face the reference plane. In addition, in order to direct the reference plane in the vertical direction or the horizontal direction, the posture changing unit 512 adjusts the measurement solid shape and the reference solid shape so that the normal line of the reference plane is parallel to the vertical direction or the horizontal direction of the measurement screen. Change posture. The cutting line designation unit 513 receives designation of the cutting line in the measurement screen.

  The profile acquisition unit 506 acquires a measurement cross-section profile and a reference cross-section profile by cutting the measurement solid shape and the reference solid shape after the posture change with the cut surface, using a plane that includes the cutting line and perpendicular to the measurement screen as a cut surface. To do.

  The cross-section measuring unit 514 performs dimension measurement based on designation of a position with respect to the measurement cross-sectional profile being displayed. The designation of the position is performed based on a user operation using the keyboard 52 or the mouse 53. The profile display unit 508 displays the result of dimension measurement in association with the measurement cross-sectional profile.

<Alignment screen 300>
18 to 21 are diagrams illustrating an example of an operation at the time of alignment in the information processing terminal 500 of FIG. FIG. 18 shows an alignment screen 300 displayed on the display unit 51. The alignment screen 300 is an operation screen for performing alignment between two shape data.

  The alignment screen 300 includes a display field 301 for displaying measurement data, a display field 302 for displaying reference data, and a preview field 303 for displaying measurement data and reference data in a common coordinate system. And an operation column 304 for designating a geometric element. The display columns 301 and 302 are arranged on the left side of the preview column 303, and the operation column 304 is arranged on the right side of the preview column 303.

  The display column 301 displays the measurement solid shape, and the display column 302 displays the reference solid shape. The three-dimensional shape is displayed three-dimensionally, and the display position, viewpoint position, posture, and the like can be adjusted by operating the mouse.

  In the operation column 304, a shape button 305 for designating the shape of the geometric element used for alignment, a reverse box 306 for reversing the direction of the geometric element, and an alignment element list 307 are arranged. ing. The shape button 305 is provided for each of the three shape types: plane, cylinder, and point.

  For example, when the mouse pointer 7 is moved onto the “plane” shape button 305 and the shape button 305 is operated by a click operation, the plane is extracted from the measurement solid shape or the reference solid shape, and is used as a geometric element for alignment. Can be specified.

  FIG. 19 shows a state after the first geometric element 310 is extracted from the measurement data. The first geometric element 310 is extracted from the measurement solid shape by performing a click operation on the measurement solid shape in the display field 301 in a state where the mouse pointer 7 is moved on the desired geometric element. The first geometric element 310 has a planar shape and is displayed with coloring.

  FIG. 20 shows a state after the second geometric element 311 is extracted from the reference data. The second geometric element 311 performs a click operation on the reference three-dimensional shape in the display field 302 while moving the mouse pointer 7 on the geometric element corresponding to the first geometric element 310, thereby removing the reference three-dimensional shape from the reference three-dimensional shape. Extracted. The second geometric element 311 has a planar shape and is displayed with coloring.

  FIG. 21 shows a state after the alignment by the first set of geometric elements 310 and 311 is completed. By sequentially extracting the first geometric element 310 and the second geometric element 311 from the measurement solid shape and the reference solid shape, and operating the OK button 308, these geometric elements are associated as a first set of geometric elements, Alignment is performed. In the preview column 303, the measured three-dimensional shape after alignment and the reference three-dimensional shape are displayed in an overlapped state.

  In the alignment between the planes, there remains a degree of freedom of movement in a direction parallel to the planes and rotation around an axis perpendicular to the planes. Therefore, by specifying the second set of geometric elements and then the third set of geometric elements and repeating the positioning, the positioning accuracy can be improved.

  When the first set of geometric elements has a planar shape, the alignment by the second set of geometric elements includes a movement in a direction parallel to the plane of the first set and a rotation about an axis perpendicular to the plane. Limited to 2 degrees of freedom. That is, the alignment by the second set of geometric elements is performed under the restriction of the alignment by the first set of geometric elements. Specifically, the alignment by the second set of geometric elements is performed under the restriction that the normals of the planes of the first set are matched. Similarly, when the second set of geometric elements is also a planar shape, the alignment by the third set of geometric elements is subject to the limitation of the alignment by the first set of geometric elements and the second set of geometric elements. Done. Specifically, the alignment by the third set of geometric elements is performed under the restriction that the normals of the first set of planes are matched and the normals of the second set of planes are matched. Is called.

  Note that it is not necessary to specify the second or third set of geometric elements if sufficient accuracy can be obtained by the alignment using the first set of geometric elements. When the first set of geometric elements has a planar shape, a plane normal is used as a geometric feature. However, since the extracted geometric element has a finite end, it has an edge in addition to the plane normal. In some cases, sufficient accuracy may be obtained by performing alignment by using a plurality of geometric features of the first set of geometric elements. If sufficient accuracy cannot be obtained by aligning the first set of geometric elements with a plurality of geometric features, alignment by the second set of geometric elements can be performed. The normal of is a geometric feature that limits alignment by the second set of geometric elements, but features other than the normal of the first set of planes are not used in the alignment by the second set of geometric elements, or Geometric features with low limit weighting. If the fourth set of geometric elements is designated, the best fit position alignment can be performed. Best-fit alignment does not directly align using geometric features between geometric elements, but uses a deviation between the three-dimensional shape data corresponding to the specified geometric elements, so that only a small amount of the three-dimensional shape can be obtained. This is a process for obtaining an optimal solution by shifting. A first set of geometric elements can be specified for best fit alignment. If the geometric element is a cylinder or a cone, the central axis may be used as a geometric feature.

  Further, in the case of alignment between planes, the geometric element may be positioned in the opposite direction by 180 °. In such a case, by inputting a check mark in the reverse direction box 306, the direction of the geometric element can be reversed or reversed.

<Measurement screen 320>
22 to 26 are diagrams showing an example of an operation at the time of cross-sectional comparison in the information processing terminal 500 of FIG. FIG. 22 shows a measurement screen 320 displayed on the display unit 51. The measurement screen 320 is an operation screen for comparing two cross-sectional profiles, and is displayed on the display unit 51 after the alignment of the measurement solid shape and the reference solid shape is completed.

  The measurement screen 320 includes a three-dimensional shape display field 321, a projection image display field 322, a cross-sectional profile display field 323, and operation fields 324 and 325. In the display column 321, the measured three-dimensional shape and the reference three-dimensional shape after alignment are displayed in an overlapping manner. The display field 322 displays a projection image obtained by projecting the measurement solid shape and the reference solid shape onto the measurement screen 320.

  The projected image in the display field 322 is created from the measured solid shape and the reference solid shape after being rotated so that the reference plane is in a specific posture with respect to the measurement screen 320. For example, the first set of geometric elements for alignment is designated as the reference plane, and the measurement solid shape and the reference solid shape after the normal line of the reference plane is rotated in parallel with the vertical direction of the measurement screen 320 are displayed. A corresponding projection image is displayed.

  In the operation column 324, various tool buttons for designating the cutting line 93 and a deletion button for deleting the cutting line 93 are arranged. In the display column 323, a measurement cross-sectional profile and a reference cross-sectional profile representing the shape of the cut surface when the measurement solid shape and the reference solid shape are cut by the cutting line 93 are displayed in an overlapping manner. In the operation column 325, various tool buttons for specifying a dimension type, a delete button for deleting a dimension value or a dimension line, various difference buttons 326, and a difference emphasis column 327 are arranged. .

  Dimension types that can be selected by the tool button include line-line, line-point, point-point, and angle. The difference button 326 includes a maximum difference, an average difference, and a difference area. The difference area difference button 326 is an operation icon for obtaining the area of the region between the measured cross-sectional profile and the reference cross-sectional profile.

  The difference emphasis column 327 is an input column for displaying a graph that changes according to the difference value by superimposing it on the cross-sectional profile. If a check mark is entered in the check box, a graph is displayed in association with the measured cross-sectional profile and the reference cross-sectional profile in the region of interest, and the degree of deviation can be emphasized. Further, the magnification of the difference value can be adjusted by moving the slider.

  FIG. 23 shows a profile selection screen 328 displayed on the measurement screen 320. When a straight line is extracted by specifying the rectangular region 313 with respect to the cross-sectional profile 312, the extraction source cross-sectional profile 312 is a cross-sectional profile acquired from measurement data (measurement solid shape data), or reference data ( It is necessary to select whether it is a reference cross-sectional profile acquired from (reference solid shape data). In such a case, a profile selection screen 328 is displayed, and either the measurement cross-sectional profile or the reference cross-sectional profile can be selected.

  By extracting a straight line from the measured cross-sectional profile or the reference cross-sectional profile, the distance between two straight lines, the distance between a point and a straight line, the angle formed by the two straight lines, and the like can be measured. Further, if a point on the measurement cross-sectional profile or the reference cross-sectional profile is designated, the distance between the two points can be measured.

  FIG. 24 shows a case where a region of interest 314 is designated for the cross-sectional profile 312. By specifying the region of interest 314 for the cross-sectional profile 312, the maximum difference value, the average difference value, or the difference area is obtained for the measurement cross-sectional profile and the reference cross-sectional profile in the region of interest 314, and the measurement results are superimposed and displayed. be able to.

  For example, the maximum difference value “−0.198 mm” is displayed in association with the measurement location. By adopting such a configuration, it is possible to more objectively understand the degree of displacement, the position, and the polarity of the displacement occurring between the three-dimensional shapes.

  FIG. 25 shows a case where the display magnification of the cross-sectional profile 312 is increased. The display magnification of the measurement cross-sectional profile 312a and the reference cross-sectional profile 312b displayed in the display field 323 can be changed as appropriate by operating the mouse.

  The region between the measured cross-sectional profile 312a and the reference cross-sectional profile 312b is colored according to the polarity of the difference value. For example, with respect to the normal direction of the reference cross-sectional profile 312b, a region where the measured cross-sectional profile 312a is higher than the reference cross-sectional profile 312b is displayed in red, and a region where the measured cross-sectional profile 312a is lower than the reference cross-sectional profile 312b is displayed in blue. Is done. By adopting such a configuration, it is possible to improve the visibility with respect to the polarity of the deviation occurring between the three-dimensional shapes.

  FIG. 26 shows a case where a graph that changes according to the difference value is displayed. By displaying a graph that changes in accordance with the difference value with respect to the cross-sectional profile 312 in the attention area 314, the degree of deviation can be easily identified. The graph is created, for example, by increasing the deviation in the normal direction of the reference cross-sectional profile. By adopting such a configuration, since the shift in the attention area 314 is emphasized by the graph, it is possible to prevent the degree of shift from being determined by the display magnification of the cross-sectional profile 312.

<Report screen 330>
FIG. 27 is a diagram showing an example of the operation at the time of outputting a report file in the information processing terminal 500 of FIG. 17, and shows a report screen 330 displayed on the display unit 51. This report screen 330 is an editing screen for recording or printing the result of the cross-sectional comparison as a report file, and is a display field for 3D images, a display field for 2D images (reference data), and a 2D image (measurement data). Display column, cross-sectional profile display column, and measurement result display column.

  In the display column of the 3D image, the measurement stereoscopic shape and the reference stereoscopic shape are displayed in an overlapping manner. A projected image obtained by projecting the reference solid shape onto the measurement screen 320 is displayed in the display field of the 2D image (reference data), and the measured solid shape is projected onto the measurement screen 320 in the display field of the 2D image (measurement data). A projected image is displayed. In the display section of the cross-sectional profile, the shape of the cut surface when the measurement solid shape and the reference solid shape are 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 S601 to S614 in FIG. 28 and FIG. 29 are flowcharts showing an example of the operation at the time of cross-sectional comparison in the information processing terminal 500 in FIG. First, the information processing terminal 5 designates reference three-dimensional shape data as a reference for comparing shapes (step S601), and displays them on the alignment screen 300 together with measurement data (measurement three-dimensional shape data) (step S602).

  Next, the information processing terminal 5 specifies the first geometric element (step S604) when the position is designated for the measurement solid shape image being displayed (step S603). Next, if a position is designated for the reference three-dimensional shape image being displayed (step S605), the information processing terminal 5 specifies the second geometric element (step S606).

  The information processing terminal 5 associates the identified first geometric element and the second geometric element as alignment geometric elements, and the relative positions of the measurement solid shape data and the reference solid shape data so that these geometric elements coincide with each other. Is changed (step S607). When the positioning is repeated by designating other geometric elements, the processing procedure from step S603 to step S607 is repeated (step S608).

  Next, the information processing terminal 5 performs a process of designating a cut surface (step S609). This processing is performed in the same manner as the processing procedure from step S501 to step S507 in FIG. 16, and a plane that includes the cutting line 93 and is perpendicular to the measurement screen 320 is designated as the cutting plane.

  Next, the information processing terminal 5 cuts the measurement three-dimensional shape and the reference three-dimensional shape with the cut surface to acquire the measurement cross-sectional profile and the reference cross-sectional profile (step S610), develops them on a plane, and displays them on the measurement screen 320 ( Step S611).

  If the attention area is designated (step S612), the information processing terminal 5 calculates a difference value for the measured cross-sectional profile and the reference cross-sectional profile in the attention area (step S613), and displays the superimposed graph (step S613). S614).

  According to the present embodiment, the relative position is changed by specifying the first geometric element and the second geometric element by designating the position with respect to the measured stereoscopic shape image and the reference stereoscopic shape image being displayed. Therefore, the positions and postures of the measurement solid shape and the reference solid shape can be matched. For this reason, even if it is a three-dimensional shape from which a position and a posture differ immediately after display, it can cut similarly and can acquire a section shape. In addition, since the measurement solid shape and the reference solid shape are represented by two-dimensional geometric figures as the measurement cross-sectional profile and the reference cross-sectional profile, respectively, it is necessary to objectively understand the degree and position of the deviation between the three-dimensional shapes. Can do.

  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 500 Information processing terminal 501 Shape data generation unit 502 Shape data storage unit 503 3D shape display 04 Geometric element extraction unit 505 Relative position change unit 506 Profile acquisition unit 507 Profile storage unit 508 Profile display unit 509 Profile comparison unit 510 Attention area designation unit 511 Reference plane designation unit 512 Attitude change unit 513 Cutting line designation unit 514 Cross section measurement unit J1 , J11, J12 Receiving axis J2, J3 Emitting axis J4 Rotating axis W Measurement object

Claims (8)

Shape data generation means for measuring position information of a plurality of measurement points in a three-dimensional space and generating measurement solid shape data representing the three-dimensional shape of the measurement object;
Shape data storage means for holding reference solid shape data as a reference when comparing shapes;
3D shape display means for displaying a measurement 3D shape image corresponding to the measurement 3D shape data and a reference 3D shape image corresponding to the reference 3D shape data on a measurement screen;
A geometric element extracting means for specifying a first geometric element based on designation of a position with respect to the measured three-dimensional shape image being displayed and identifying a second geometric element based on designation of a position with respect to the reference three-dimensional shape image being displayed; ,
Relative position changing means for changing the relative positions of the measurement solid shape data and the reference solid shape data so that the first geometric element and the second geometric element coincide with each other;
Based on the measurement solid shape data and the reference solid shape data after the change of the relative position, a measurement cross-sectional profile representing a cross-sectional shape when the measurement solid shape is cut by a cut surface is acquired, and the reference solid shape is cut. Profile acquisition means for acquiring a reference cross-sectional profile representing a cross-sectional shape when cut by a surface;
A three-dimensional measurement apparatus comprising: profile display means for displaying the measurement cross-sectional profile and the reference cross-sectional profile on the measurement screen in a superimposed manner. Profile comparison means for calculating a difference value between the measured cross-sectional profile and the reference cross-sectional profile;
The three-dimensional measuring apparatus according to claim 1, wherein the profile display means displays the difference value in association with the measurement cross-sectional profile or the reference cross-sectional profile.   3. The three-dimensional measuring apparatus according to claim 2, wherein the profile display means colors a region between the measurement cross-sectional profile and the reference cross-sectional profile according to the polarity of the difference value. A region of interest designation means for designating a region of interest for the measured cross-sectional profile and the reference cross-sectional profile being displayed is further provided.
The tertiary according to claim 2 or 3, wherein the profile display means displays a graph that changes in accordance with the difference value so as to be superimposed on the measurement cross-sectional profile or the reference cross-sectional profile in the region of interest. Former measuring device.   The relative position changing means associates the first geometric element and the second geometric element identified sequentially as a geometric element for alignment, and changes the relative position so that these geometric elements match. 2. If the first geometric element and the second geometric element are sequentially identified again after the relative position is changed, the relative position is changed so that these geometric elements also coincide. The three-dimensional measuring apparatus according to any one of 4. Reference plane designating means for designating a reference plane with respect to the measurement solid shape or the reference solid shape after changing the relative position;
Posture changing means for changing the posture of the measurement solid shape and the reference solid 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 accepting designation of the cutting line in the measurement screen,
The profile acquisition means uses the surface perpendicular to the measurement screen including the cutting line as the cutting surface, cuts the measurement solid shape and the reference three-dimensional shape after the posture change by the cutting surface, and the measurement cross-sectional profile. The three-dimensional measuring apparatus according to claim 1, wherein the reference cross-sectional profile is acquired.   The reference plane designating unit designates a plane extracted as the first geometric element from the measurement solid shape or a plane extracted as the second geometric element from the reference solid shape as the reference plane. The three-dimensional measuring apparatus according to claim 6. Based on the designation of the position relative to the measurement cross-sectional profile being displayed, further comprising a cross-section measurement means for measuring dimensions,
The three-dimensional measuring apparatus according to any one of claims 1 to 7, wherein the profile display means displays the result of the dimension measurement in association with the measurement cross-sectional profile.

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