WO2022091181A1 - Shape data processing device, shape data processing method, and shape data processing program - Google Patents

Abstract

A shape data processing device, shape data processing method, and shape data processing program according to the present invention: determine multiple pieces of shape identification information respectively corresponding to the shapes of multiple faces of an object of which the surface is divided into multiple faces; acquire the surface area of a face from among multiple pieces of characteristic information respectively related to the shapes of the multiple faces; calculate a point angle that is obtained by summing line angles between lines adjoining points on the multiple faces; detect a working element comprising two neighboring points from among the points and a line between the two points; and register, in a database and in association with shape identification information, point angles, working elements, and surface areas, classification information corresponding to the multiple faces.

Description

Shape data processing device, shape data processing method and shape data processing program

The present invention relates to a shape data processing device, a shape data processing method, and a shape data processing program.

Patent Document 1 describes a technique for determining the surface shape of an object classified in the technical field of CAE (Computer Aided Engineering) such as structural analysis using a plurality of symbols (+,-, 0). It has been disclosed.

International Publication No. 2017/175349

By the way, in the technical field of CAD (Computer-Aided Design), a three-dimensional (three-dimensional) object shape is output by using the determination result of the surface shape of the classified object. Is desired. Further, in recent years, a technique for determining the shape of a three-dimensional object by using an AI (artificial intelligence) technique has attracted attention.

However, in the disclosed technique of Patent Document 1, since it is not possible to specify which category and what shape the surface shape of the classified object is, it is used in the CAD technical field (particularly AI technology). The reality is that we have not been able to do it.

Therefore, the present invention can specify which category and what shape the surface shape of the classified object is, thereby entering the technical field of CAD (particularly AI technology). It is an object of the present invention to provide a shape data processing apparatus, a shape data processing method, and a shape data processing program that can be used.

The present invention provides the following shape data processing device, shape data processing method, and shape data processing program in order to solve the above problems.

(1) Shape Data Processing Device The shape data processing device according to the present invention is a determination means for determining a plurality of shape identification information corresponding to each of the shapes of the plurality of faces in an object whose surface is divided into a plurality of faces. And, the acquisition means for acquiring the area of the plurality of characteristic information related to the shapes of the plurality of surfaces, and the point angle obtained by summing the line angles between the lines adjacent to each point of the plurality of surfaces are calculated. The point angle calculating means, the activator detecting means for detecting the activator consisting of two adjacent points among the points and the line between the two points, and the classification information corresponding to the plurality of surfaces are described above. It is characterized by comprising shape identification information, the point angle, the activator, and a registration means for registering in a database in association with the area.

(2) Shape Data Processing Method The shape data processing method according to the present invention is a shape data processing method performed by a shape data processing apparatus, and the determination means is a plurality of objects in an object whose surface is divided into a plurality of surfaces. A determination step for determining a plurality of shape identification information corresponding to each of the shapes of the surfaces, an acquisition step for the acquisition means to acquire an area of a plurality of characteristic information related to each of the shapes of the plurality of surfaces, and a point. The angle calculation means calculates the point angle by summing the line angles between the lines adjacent to each point of the plurality of surfaces, and the activator detecting means is two adjacent points among the points. An activator detection step for detecting an activator consisting of a point and a line between the two points, and a registration means, the division information corresponding to the plurality of surfaces are subjected to the shape identification information, the point angle, the activator, and the activator. It is characterized by including a registration step associated with the area and registered in the database.

(3) Shape Data Processing Program The shape data processing program according to the present invention is for causing a computer to execute each step of the shape data processing method according to the present invention.

According to the present invention, it is possible to specify which category and what shape the surface shape of the classified object is, which is used in the CAD technical field (particularly AI technology). It becomes possible to do.

FIG. 1 is a block diagram showing an example of a hardware configuration of a shape data processing device. FIG. 2 is a flowchart showing an example of a processing procedure of the shape data processing apparatus. FIG. 3 is an explanatory diagram showing an example of the aspect of the division information of a part of the object. FIG. 4 is an explanatory diagram of an object determination process by the shape data processing device. FIG. 5 is an explanatory diagram of an object determination process by the shape data processing device. FIG. 6 is an explanatory diagram of an object determination process by the shape data processing device. FIG. 7 is a flowchart showing a procedure for determining an object by the shape data processing device. FIG. 8 is an explanatory diagram showing a processing result when the determination processing is applied to a specific shape portion of the analysis structure. FIG. 9 is an explanatory diagram showing a processing result when the determination processing is applied to a specific shape portion of the analysis structure. FIG. 10 is an explanatory diagram showing a processing result when the determination processing is applied to a specific shape portion of the analysis structure. FIG. 11 is an explanatory diagram showing a processing result when the determination processing is applied to a specific shape portion of the analysis structure. FIG. 12 is an explanatory diagram showing a simple example when the analysis structure is divided into hexahedral meshes. FIG. 13 is an explanatory diagram conceptually explaining a line angle and a point angle between lines adjacent to each point of a plurality of surfaces. FIG. 14A is a data structure diagram schematically showing an example of the data structure of the shape specifying data of a part of the object shown in FIG. 13 in the database. FIG. 14B is a data structure diagram schematically showing an example of the data structure of the shape specifying data obtained by processing the shape specifying data shown in FIG. 14A. FIG. 15 is a perspective view showing an example of a hexahedron rib as an object provided on the base material. FIG. 16 is a perspective view showing an example of a rib in which two hexahedrons having different sizes are joined as an object provided on the base material. FIG. 17 is a perspective view showing an example of a rib in which two hexahedrons are joined so as to be orthogonal to each other as an object provided on the base material. FIG. 18A is a perspective view showing an example of a cylindrical rib as an object provided on the base material. FIG. 18B is a perspective view showing another example of a cylindrical rib as an object provided on the base metal. FIG. 19A is a perspective view showing an example of a hole in a pedestal as an object provided on the base material. FIG. 19B is a perspective view showing another example of a hole in the pedestal as an object provided on the base metal. FIG. 20 is a perspective view showing an example of a rib in which a cylinder and a hexahedron are joined as an object provided on the base material. FIG. 21 is a perspective view showing an example of a rib in which an L-shaped member is joined to the end of a hexahedron as an object provided on the base material. FIG. 22 is a perspective view showing an example of a fillet in an object. FIG. 23A is a perspective view showing an example of a rectangular hole provided in the object. FIG. 23B is a perspective view showing an example of a circular hole provided in the object. FIG. 24 is a perspective view showing an example of a rib in which a cylinder and a right-angled triangular prism are joined as an object provided on the base material.

Hereinafter, embodiments according to the present invention will be described with reference to the drawings.

[Hardware configuration of shape data processing device]
First, the hardware configuration of the shape data processing apparatus 100 according to the present embodiment will be described below with reference to FIG.

FIG. 1 is a block diagram showing an example of the hardware configuration of the shape data processing device 100.

As shown in FIG. 1, the shape data processing device 100 includes a control unit 110 (computer), a storage unit 120, a reading unit 130, and an output unit 140. The control unit 110 is configured to realize various functions required for the control unit 110 by executing the shape data processing program P stored (installed) in advance in the recording device 121 of the storage unit 120. Specifically, the control unit 110 is composed of a processor such as a CPU. The control unit 110 performs various processes by loading and executing a software program such as the shape data processing program P previously stored in the recording device 121 on the RAM 122b of the memory device 122. The storage unit 120 includes a memory device 122 such as a ROM 122a and a RAM 122b, and a recording device 121 such as a flash memory and a hard disk device. The shape data processing program P acquired from the reading unit 130 is stored in the recording device 121 in advance. The shape data processing program P is downloaded via a communication means such as the Internet. The output unit 140 includes a display device 141 such as a liquid crystal display panel and a printing device 142 such as a laser printer. The display device 141 displays the output display information from the control unit 110 on the display screen. The printing device 142 prints the output display information from the control unit 110. The reading unit 130 includes a reading device 131 that reads a recording medium M such as a CD-ROM. The shape data processing program P may be recorded in advance on the recording medium M and read by the reading device 131. The recording medium M may be a recording disc such as a CD-ROM, or any other recording medium.

[Software configuration of shape data processing device]
Next, the software configuration of the shape data processing device 100 will be described below with reference to FIG.

The control unit 110 includes a three-dimensional CAD data input means Q1, a shape recognition means Q2, a determination means Q3, an acquisition means Q4, a point angle calculation means Q5, an actuator detection means Q6, a registration means Q7, and a shape. It functions as a means including the specific means Q8 and the output means Q9. That is, the shape data processing program P includes a three-dimensional CAD data input step, a shape recognition step, a determination step, an acquisition step, a point angle calculation step, an actuator detection step, a registration step, and a shape identification step. , The control unit 110 is made to execute the step including the output step.

[Processing procedure of shape data processing device]
FIG. 2 is a flowchart showing an example of a processing procedure of the shape data processing apparatus 100.

In an example of the processing procedure of the shape data processing device 100, each processing of 3D CAD data input, shape recognition, shape identification information determination, characteristic information acquisition, point angle calculation, actuator detection, database registration, shape identification, and information output is performed. conduct.

(3D CAD data input)
In the 3D CAD data input step, the control unit 110 inputs 3D CAD data (3D CAD model), which is the shape data of the object (product) created by the 3D CAD, from the reading unit 130.

(Shape recognition)
Next, in the shape recognition step, the control unit 110 recognizes the shape based on the three-dimensional CAD data. Specifically, the shape recognition step can be mainly divided into three steps.

In the first step, each surface information of 3D CAD data is acquired. A free mesh is created on each surface of the first input 3D CAD data, and a database for feature calculation (database DB in this example) is constructed. Such features include, for example, surface curvature, outer peripheral curvature, outer peripheral length, fixed points on the outer circumference, length ratio of paired outer peripheral pairs, outer circular shape, cylindrical shape, sphericality, internal angle of fixed points, etc. Includes area, in-plane normal angle difference, surface continuity, peripheral contact angle, and cross-sectional shape. In order to calculate these features, we mainly refer to the mesh data together with the acquired geometry shape information.

The term "feature" as used herein means, for example,
(1) "Overall shape": A twisted uneven plate with holes (2) "Draw beads": Strip-shaped uneven parts made on a flat surface (3) "Fillet": Sharpened corners are rounded It refers to the "shape" (or the word that indicates it) such as a part, and is called "shape".

In addition, the "starting point (including vertices and ends)" and "switching" part of "feature = shape" (however, not all "lines" expressed in 3D CAD data correspond to it). Called a "feature".

In the second step, each aspect is classified based on the acquired information and features. After acquiring the data and calculating the characteristics of each face, each face is classified into 5 different types (plane, fillet, cylinder, sphere, curved surface). In order to classify each surface, it is confirmed whether it has a specific feature depending on the surface type to be classified. As an example, in order to consider a surface as a fillet surface, the curvature of the surface, the curvature of the outer circumference, the outer circumference length, the width of the surface, the fixed point on the outer circumference, the length ratio of the paired outer circumference pair, and the outer circumference. Inspect the circular shape, the internal angle of the fixed point, the area, the continuity of the surface, the contact angle of the outer circumference, and the cross-sectional shape. Fillets, cylinders, spheres, and curved surfaces are all considered curved surfaces in the first place. Then distinguish them from different features. Also, a cylinder and a sphere can be fillets. If they have a certain form of continuity with the adjacent surface, they are considered fillets.

In the third step, recognition of a complicated part consisting of multiple surfaces is performed. 2D holes on the plate-shaped model, 3D holes on the solid model, stepped holes such as counterbore, steps, embossing, flanges, fillet flow, chamfers, corner fillets, thin surfaces between fillets, ribs, grooves Use the surface types and other information classified in the second step to recognize parts such as gear teeth and screws. Other information used to recognize the part includes the combination of face types, the positional relationship between the faces, the size of the part, and the cross-sectional shape when a composite shape is formed by a plurality of faces.

The specific part recognized through the above three steps is retained inside the system together with CAD information, mesh area information, and shape data at the time of recognition, and is used when creating a mesh according to the rules. ..

At this time, in the database DB, shape data such as characteristic information is associated with each classification information (for example, a face number or a face symbol) corresponding to the classification of the object. In this example, the division information is a surface symbol and / or a number corresponding to a surface (hereinafter, also referred to as a surface). Here, the surface means one unit constituting the object in the three-dimensional CAD data. That is, the surface is obtained by dividing the surface of the object into a plurality of surfaces for convenience in order to grasp the position of each shape in the object, and each of the plurality of surfaces is assigned a symbol and / or a number. Will be done. In addition, shape data such as characteristic information associated with each classification information may be registered in advance in the database DB. In this case, the shape recognition step can be omitted.

(Shape identification information judgment)
In the determination step, the control unit 110 determines a plurality of shape identification information (+1, -1, 0) corresponding to each of the shapes of the plurality of surfaces in the object whose surface is divided into the plurality of surfaces (surfaces). ..

FIG. 3 is an explanatory diagram showing an example of the surface of the division information M12 of a part of the object. The surface shown in FIG. 3 exemplifies the surface of the division information M12 of the rounded thick portion (fillet) which is the root of the rising portion of the rib-shaped rib shown in FIG. 8 to be described later.

In the database DB, as information on each surface, the area a1, the lines L1 to L4 and the number of lines constituting the outer shape of each surface, the lengths of the respective lines L1 to L4, and the maximum line length (L1 (or L3 in this example)). ) Width w) and equivalent line width (= area a1 / maximum line L1 length d) are registered for each division information.

Here, assuming that one surface registered in the database DB is the first surface (reference surface) of the first division information and the other surface adjacent to this is the second surface of the second division information, the determination step. Is an outer product vector based on the normal vector (out-of-plane vector) of the surface of the first division information (reference surface) and the vector in the tangential direction in which the surface of the first division information and the surface of the second division information are in contact with each other. The first is based on the calculation results of the outer product calculation step for obtaining the inner product, the inner product calculation step for obtaining the inner product of the obtained outer product vector and the normal vector (outside vector) of the surface of the second division information, and the inner product calculation step. It includes a determination step of determining the surface shape of the surface of the second division information with respect to the surface of the division information.

Next, the determination process by the determination step of the above configuration will be described below with reference to the explanatory diagrams shown in FIGS. 4 to 6 and the flowchart shown in FIG. 7.

4 to 6 are explanatory views of the object determination process by the shape data processing device 100. Further, FIG. 7 is a flowchart showing a procedure for determining an object by the shape data processing device 100.

In the outer product calculation step, one surface registered in the database DB is set as a surface (reference surface) of the first division information M1, and another surface of the other division information adjacent to the surface is used as a surface of the second division information M2. Perform an outer product operation (ST1). Here, the surface (reference surface) of the first division information M1 is basically a plane. In the outer product calculation step, as shown in FIGS. 4 to 6, the normal vector (out-of-plane vector) R of the surface (reference surface) of the first division information M1, the surface of the first division information M1, and the second. The outer product vector V is obtained from the vector S in the tangential direction in which the surface of the division information M2 is in contact with the above.

Next, in the inner product calculation step, the inner product of the outer product vector V obtained in the outer product calculation step and the normal vector (outside vector) T of the surface of the second division information M2 is obtained (ST2), and the calculation result is determined. Enter in the step.

In the determination step, the surface shape of the surface of the second division information M2 with respect to the surface of the first division information M1 is determined based on the input calculation result.

Specifically, when it is determined whether or not the calculation result is a positive value (ST3) and the calculation result shows a positive value (ST3: Yes), the surface of the second division information M2 is concave (FIG. 4) to determine the shape identification information (+1) (ST4). On the other hand, when the calculation result is not a positive value (ST3: No), it is determined whether or not the calculation result is a negative value (ST5), and when the calculation result shows a negative value (ST5: Yes). , The shape identification information (-1) is determined by using the surface of the second division information M2 as a convex surface (see FIG. 5) (ST6). If the calculation result is not a negative value (step ST5: No), it is determined whether or not the calculation result is a zero value (ST7), and if the calculation result indicates a zero value (ST7: Yes). ), The shape identification information (0) is determined assuming that the surface of the second division information M2 is a plane continuous with the surface of the first division information M1 (see FIG. 6) (ST8). If No is determined even in ST7, error processing (ST10) is executed to move to ST9.

After that, it is confirmed whether or not the processing of all the classification information faces has been completed (ST9), and if the processing of all the classification information faces has not been completed (ST9: Yes), the process returns to ST1. Repeat the process. On the other hand, if the processing of all the classification information surfaces is completed (ST9: No), the surface shape determination processing is terminated at that point.

That is, in the present embodiment, as a result of the above-mentioned inner product calculation, the surface where the adjacent surfaces bite into the surface when viewed from the reference surface always has a negative value, and the surface spreading out of the surface always has a positive value. I am using.

FIGS. 8 to 11 exemplify the processing results when the above determination processing is applied to a specific shape portion of the analysis structure.

FIG. 8 shows the result of applying the above determination process to the rib shape, and the surface of the rounded thick portion (fillet) which is the root of the rising portion of the rib has a positive (+) result of the inner product calculation. On the surface of the tip (end) of the rib, the result of the inner product calculation is minus (-). As a result, in FIG. 8, the surface (M11) is a flat surface, the surface (M12) is a concave surface, the surface (M13) is a flat surface, the surface (M14) is a convex surface, the surface (M15) is a flat surface, and the surface (M16) is a concave surface. (M17) will be classified as a plane.

Further, FIG. 9 shows the result of applying the above determination process to the shape of the end portion, and the rounded surface of the corner portion of the end portion has a negative (-) result of the inner product calculation. .. As a result, in FIG. 9, the surface (M21) is classified as a plane, the surface (M22) is classified as a convex surface, the surface (M23) is classified as a plane, the surface (M24) is classified as a convex surface, and the surface (M25) is classified as a plane.

Further, FIG. 10 shows the result of applying the above determination process to the shape in which the plane continues. If the plane continues, the result of the inner product operation will also be zero (0). As a result, in FIG. 10, the plane (M31) is classified as a plane, the plane (M32) is classified as a plane, the plane (M33) is classified as a plane, and the plane (M34) is classified as a plane.

Further, FIG. 11 shows the result of applying the above determination process to the shape including the gradually changing surface (slowly changing surface), and for the gradually changing surface, the result of the inner product calculation is plus (+) and minus. It is (-). As a result, in FIG. 11, the surface (M41) is classified as a plane, the surface (M42) is classified as a gradually changing surface (in this example, an inclined surface), and the surface (M43) is classified as a plane.

Information on the shape type of each surface of the analysis structure (object) classified in this way is used for various subsequent analysis simulations.

That is, according to the surface shape determination process of the present embodiment, the surface shape of each of the divided surfaces can be determined only by the plus, minus, and zero of the calculated values of the calculation result, so that the surface determination process is simple and extremely high speed. It becomes possible to do it.

As the shape model of the analysis structure, the surface shape determination process of the present embodiment can be applied to various shape models such as a solid model and a wire model in addition to the above surface model. Is.

(Explanation of an application example of the surface shape determination process according to the embodiment)
For example, in the case of the shape shown in FIG. 11, the connection point e1 (point) between the surface (M41) and the surface (M42) and the connection point e2 (point) between the surface (M42) and the surface (M43) become opposite surfaces. By drawing straight lines L11 and L12 vertically, the distance (thickness of the analysis structure) at each connection point e1 and e2 can be known. Therefore, by using this information, for example, a neutral surface (or mesh) CF1 can be easily attached to the center of the gradually changing surface (M42). Further, even when the neutral surface (or mesh) CF2 of the surface (M41) is extended and pasted as it is to the surface (M42) and the surface (M43), the analysis structure from the surface (M41) to the surface (M43) is attached. It is necessary to specify the shape of the above in advance, but by using the surface shape determination process of the present embodiment, such shape can be easily specified.

Further, FIG. 12 is an explanatory diagram showing a simple example in which the analysis structure is divided into hexahedral meshes, and is a normal vector of a plane (M51) which is a reference plane, and a plane (M51) and a plane (M52). The outer product vector is obtained from the vector in the tangential direction in contact with), and the inner product of this outer product vector and the normal vector of the surface (M52) is obtained, and the calculation result is positive. That is, it can be seen that the connecting portion between the surface (M51) and the surface (M52) is a concave portion. Therefore, by drawing a cut line CL1 downward along the plane (M52) from this connection point e (point) [that is, parallel to the plane (M54)], the analysis structure is divided into two left and right hexahedral meshes. can do. Further, by drawing a cut line CL2 from this connection point e to the left along the plane (M51) [that is, parallel to the plane (M53)], the analysis structure can be divided into two upper and lower hexahedral meshes. can.

Note that the application examples shown in FIGS. 11 and 12 are only examples, and are not limited to these application examples.

(Acquisition of characteristic information)
In the acquisition step, the control unit 110 acquires the area of the surface among the plurality of characteristic information related to the shapes of the plurality of surfaces. Here, the characteristic information is the characteristic information recognized in the shape recognition step or the characteristic information registered in advance. As the characteristic information, for example, the width, length, area, thickness, curvature of the surface (surface), and the coordinates of the inflection point at which the shape is switched within the surface (surface) can be mentioned.

FIG. 13 shows lines (K1-K2), (K2-K3), (K3-K1), adjacent to points A, B, ... Of a plurality of surfaces (M1, M2, M3, M4, M5, ...). It is explanatory drawing which conceptually explains (B1 + B2 + B3 + B4), the line angle (A1, A2, A3), ... and the point angle (A1 + A2 + A3), ...

According to the findings of the present inventor, as shown in FIG. 13, the object N (analyzed structure) has shape identification information (+1) for a plurality of surfaces (M1, M2, M3, M4, M5, ...). , -1, 0), point angles (A1 + A2 + A3), (B1 + B2 + B3 + B4), ..., activators (A, B, K1), ..., And areas S1, S2, ....

Here, the shape identification information (+1, -1, 0) is, for example, a concave surface (+), a convex surface (-), and a flat surface (0). The point angles (A1 + A2 + A3), (B1 + B2 + B3 + B4), ... Are the sum of the line angles (A1, A2, A3), (B1, B2, B3, B4), ... The line angles (A1, A2, A3), (B1, B2, B3, B4), ... Are the lines adjacent to the points A, B, ... [(K1-K2), (K2-K3), (K3-K3-). K1)], [(K1-K5), (K5-K4), (K4-K6), (K6-K1)], .... The point angles (A1 + A2 + A3), (B1 + B2 + B3 + B4), ... Are basically 270 degrees, 360 degrees, and 450 degrees, and the larger the point, the more complicated the line enters.

For example, the line angles A1, A2, and A3 of the point A are 90 degrees, 90 degrees, and 90 degrees, respectively, and the point angle (A1 + A2 + A3) is 270 degrees (= 90 degrees), which is the sum of the line angles A1, A2, and A3. +90 degrees +90 degrees). When the point angle is 270 degrees, it is often present at the tip of the prism. The line angles B1, B2, B3, B4 of the point B are 90 degrees, 135 degrees, 135 degrees, and 90 degrees, respectively, and the point angles (B1 + B2 + B3 + B4) are 450, which is the sum of the line angles B1, B2, B3, and B4. Degrees (= 90 degrees + 135 degrees + 135 degrees + 90 degrees). When the point angle is 450 degrees, it is often present at the bottom of the prism. When the point angle is 360 degrees, it often exists at the bottom or end of the cylinder, or at the bottom or end of the cylinder.

Further, the operators (A, B, K1), ... Are two adjacent points (A, B), ... And two points (A, B), among the points A, B, .... It consists of lines K1 and ... between ... For example, at the end of a cylinder, each point of the operator often has the same value.

For example, for actors (B, E, K6), (A, F, K3), (point angle of point B) = (point angle of point E), (point angle of point A) = (point of point F). Since the point B and the point E have the same structural angle at the angle), it is assumed that there is no specific structure between the activators (B, E, K6) and (A, F, K3), and the following Consider actor candidates (E, F, K8), (C, D, K7).

(Calculation of point angle)
In the point angle calculation step, the lines [(K1-K2), (K2-K3), (K3-) adjacent to the points A, B, ... Of the plurality of surfaces (M1, M2, M3, M4, M5, ...) K1)], [(K1-K5), (K5-K4), (K4-K6), (K6-K1)], ... Line angles (A1, A2, A3), (B1, B2, B3) B4), ... are summed up to calculate the point angles (A1 + A2 + A3), (B1 + B2 + B3 + B4), ...

(Operator detection)
In the operator detection step, an operator consisting of two adjacent points (A, B), ... And two points (A, B), ... Of each point A, B, ... (A, B, K1), ... Are detected.

(Database registration)
FIG. 14A is a data structure diagram schematically showing an example of the data structure of the shape specifying data DT1 of a part of the object N shown in FIG. 13 in the database DB.

In the registration step, the division information M1, M2, ... (For example, a surface number or a surface symbol) corresponding to a plurality of surfaces is registered in the database DB in association with the shape identification information, the point angle, the operator and the area of the surface.

Specifically, in the registration step, an operator (A, B, K1) including each point A, B, ..., Each point A, B, ... For the division information M1, M2, ... Registered in the database DB in association with shape identification information (+1, -1,0), point angle (for example, 270 degrees, 450 degrees, 450 degrees, ...), area S1, S2, ... (For example, 1000 mm ² , ...). do. Thereby, in the shape specifying step to be carried out thereafter, the three-dimensional shape of the object N can be specified by the combination of these data.

By the way, the thicknesses of adjacent faces (M1, M2), (M1, M3), ... (Thickness in the direction orthogonal to the faces) are often the same. Further, the curvatures of adjacent surfaces (M1, M2), (M1, M3), ... May be the same.

Therefore, in the registration step, the division information M1, M2, ... Is further added to the operators (A, B, K1), ..., The thickness of each surface h1, h2, ... It may be registered in the database DB in association with (for example, 0, ...). Thereby, in the shape specifying step described later, whether or not the thickness of one surface is equal to the thickness of the other surface to be adjacent, or / and the curvature of one surface is equal to the curvature of the other surface to be adjacent. Depending on whether or not it is present, the accuracy of identifying another surface adjacent to one surface can be improved.

(Shape identification)
In the shape specifying step, the control unit 110 controls the division information M1, M2, ... Each actor, shape identification information (+ 1, -1, 0), point angle, and surface area S1, S2, ... Stored in the database DB. Further, the surface thicknesses h1, h2, ... And / or the surface curvature are read from the database DB. The control unit 110 has read out division information M1, M2, ... Each operator, shape identification information (+1, -1, 0), point angle and surface area S1, S2, ..., Further, surface thickness h1. , H2, ... And / or the division information M1, M2, ... Is connected from the curvature of the surface to specify the shape of the object N. For example, the surface of the division information M1 is a plane (curvature 0) having an area S1 of 1000 mm, a thickness h1 of 20 mm, and a length of 50 mm = 1000 mm / 20 mm, and the surfaces of the division information M2 and M3 are actuators (A, B). , K1), (A, D, K2) are adjacent to each other by a convex surface (-1), and the surfaces of the division information M1 and M2 are actuators (B, C, K5) with the surfaces of the division information M4 and M5. It can be seen that B, E, K6) are adjacent to each other with a concave surface (+1). Further, since the point angles of the points A, D, F, H, ... Are 270 degrees, it can be seen that they usually exist at the tip of the prism. Since the point angles of points B, C, E, ... Are 450 degrees, it can be seen that they usually exist at the bottom of the prism. Further, when the point angle is 360 degrees, it can be seen that it usually exists at the bottom or end of the cylinder, or at the bottom or end of the cylinder. Hereinafter, the three-dimensional shape of the object N can be specified by performing the recognition processing on all the surfaces in the same manner.

The shape may be specified by using the shape specifying data DT1 for specifying the shape of the object N shown in FIG. 14A, but the shape is specified for each surface (division information) so that the data can be easily processed. The three-dimensional shape of the object N may be specified by using the shape specifying data DT1a obtained by processing the data DT1.

FIG. 14B is a data structure diagram schematically showing an example of the data structure of the shape specifying data DT1a obtained by processing the shape specifying data DT1 shown in FIG. 14A.

In the processed shape specifying data DT1a shown in FIG. 14B, the "number of point angles" in the "number or ratio of point angles" represents the number of the same point angles on each surface, for example, a surface (M1). ), The number of point angles of 270 degrees is two, which is the sum of one point A and one point D, and the number of point angles of 450 degrees is one point B and one point C. It means that the total of and is two. The "ratio" is the ratio of the number of point angles to the total number (for example, 4) [for example, 2/4 = 50% at 270 degrees of the surface (M1), 0% at 360 degrees, and 2/4 = 50 at 450 degrees. %].

Of the "number or ratio of shape identification information", the "number of shape identification information" represents the number of the same shape identification information for the operator in each surface. For example, in the surface (M1), the concave surface (+1). Is one of the operators (point B, point C, line K5), and the number of convex surfaces (-1) is one of the operators (point A, point B, line K1) and the operator (point C). , Point D, line K7) and one operator (point A, point D, line K2) are totaled three, indicating that the number of plane surfaces (0) is zero. ing. The "ratio" is the ratio of the number of shape identification information for each operator to the total number (for example, 4) [for example, in the case of a surface (M1), 1/4 = 25% for a concave surface (+1) and 1/4 = 25% for a convex surface (-1). 3/4 = 75%, 0% on the plane (0)].

In addition, among the "number or ratio of actuators between adjacent point angles to the actuator", "number of actuators between adjacent point angles" is the same combination of actuators between adjacent point angles on each surface. For example, in the surface (M1), one combination of the point angle 270 degrees of the point A and the point angle 270 degrees of the point D, the point angle 450 degrees of the point B, and the point angle of the point C are represented. A total of one combination with 450 degrees, a combination of a point angle of 270 degrees at a point A and a point angle of 450 degrees at a point B, and a combination of a point angle of 270 degrees at a point D and a point angle of 450 degrees at a point C. It represents two pieces. On the surface (M2), one combination of the point angle 270 degrees of the point A and the point angle 270 degrees of the point F, and one combination of the point angle 450 degrees of the point B and the point angle 450 degrees of the point E. It represents a combination of a point angle of 270 degrees of a point A and a point angle of 450 degrees of a point B, and a total of two combinations of a point angle of 270 degrees of a point F and a point angle of 450 degrees of a point E. Further, on the surface (M3), the combination of the point angle 270 degrees of the point A and the point angle 270 degrees of the point D, the combination of the point angle 270 degrees of the point D and the point angle 270 degrees of the point H, and the point of the point H. It represents a total of four combinations of an angle of 270 degrees and a point angle of point F of 270 degrees, and a combination of a point angle of point F of 270 degrees and a point angle of point A of 270 degrees. "Ratio" is the ratio of the number of operators between adjacent point angles to the total number (eg 4) [eg 1/4 = 25% between 270 and -270 degrees of the surface (M1), 360 degrees-360. 0% between degrees, 1/4 = 25% between 450 degrees and 450 degrees, 0% between 270 degrees and 360 degrees, 2/4 = 50% between 270 degrees and 450 degrees, and 360 degrees and 450 degrees. Is 0%].

The "thickness" is an average value obtained by averaging the thicknesses h1, h2, ... For each operator (A, B, K1) on each surface (M1, M2, ...) Or each surface (M1, M2, ...). The thickness of the center. The thickness of the center of each surface (M1, M2, ...) Can be used, for example, when the average value of the thicknesses h1, h2, ... For each operator (A, B, K1), ... Cannot be calculated. ..

Examples of the "face name" include a rib surface, a rib root surface, a cylinder rib surface, an end surface, a fillet surface, a cylindrical surface, a base material surface, and a general surface.

The three-dimensional shape of the object N can also be specified by using the shape specifying data DT1a processed in units of surfaces (classification information) in this way.

Specifically, it can be specified as shown in FIGS. 15 to 24.

<Specific example 1>
FIG. 15 is a perspective view showing an example of a rib of a hexahedron as an object N provided on the base material I.

-When grasping the shape logically As shown in FIG. 15, for the operators (A, B, K1), ..., The point angles of the points A, D, F, and H are all 270 degrees, and the points B, C, and so on. If the point angles of E and G are both 450 degrees, the possibility of ribs is very high.

On the other hand, in the case of ribs, for the operators (A, B, K1), ..., The line angle between the lines K1-K2, K2-K3, ... Is 90 degrees, and between the lines K5-K4, K4-K6, ... The line angle is 135 degrees, the shape identification information of the operators (A, B, K1), (A, D, K2), ... Is -1, and the operators (B, C, K5), (B, E, The shape identification information of K6), (G, C, K9), ... Is +1 and the shape identification information of the operator (B, J, K4), ... Is 0.

-When capturing with AI For example, a three-dimensional shape can be specified from a set of operator shape identification information, point angles, etc. expressed by image elements such as hue, saturation, and brightness.

<Specific example 2>
FIG. 16 is a perspective view showing an example of a rib in which two hexahedrons having different sizes are joined as an object N provided on the base material I.

-When grasping the shape logically As shown in FIG. 16, as in the example shown in FIG. 15, for the operators (A, B, K1), ..., The point angles of the points A, D, F, and H are all. If the point angles of 270 degrees and points B, C, E, and G are all 450 degrees, the possibility of ribs is very high.

Further, for example, in the operator (A, B, K1), if the point angle of the point E is 450 degrees, but the point angle of the point X1 is 270 degrees, the operator (A, B, K1) ,. There is a high possibility that a joining member N2 such as a rib is joined to the rib N1 composed of (E, F, K8). When the joining member N2 is a rib, the rib N1 is a base material I1 and the base material I of the rib N1 is a base material. As shown in FIG. 16, the point X2 has a point angle of 450 degrees. The point X3 is located on the base material I1 side, and the points X4 and the point X5 having a point angle of 450 degrees are located on the base material I side.

-When capturing with AI For example, as in the example shown in FIG. 15, a three-dimensional shape can be specified from a set in which the shape identification information of the operator, the point angle, etc. are expressed by image elements such as hue, saturation, and brightness. ..

<Specific example 3>
FIG. 17 is a perspective view showing an example of a rib in which two hexahedrons are joined so as to be orthogonal to each other as an object N provided on the base material I.

FIG. 17 shows the shape identification information of the operator and the point angle of each point in the rib joined so that the two hexahedrons are orthogonal to each other.

<Specific example 4>
18A and 18B are perspective views showing an example of a cylindrical rib as an object N provided on the base material I.

FIGS. 18A and 18B show the shape identification information of the operator and the point angle of each point in the rib of the cylinder. Since the point angles of points A and B are both 360 degrees, it can be seen that they usually exist at the bottom or end of the cylinder, or at the bottom or end of the cylinder.

<Specific example 5>
19A and 19B are perspective views showing an example of holes H1 and H2 of a pedestal as an object N provided in the base material I.

19A and 19B show shape identification information of operators and point angles of each point in a pedestal provided with square holes H1 and H2. As shown in FIG. 19A, the point angle of each point of the hole H1 on the seat surface F1 (upper surface) is usually 450 degrees, and the total point angle of two adjacent points on the seat surface F1 is 900 degrees (=). (450 degrees + 450 degrees), but as shown in FIG. 19B, the total point angle of two adjacent points of the hole H2 on the seat surface F1 may be 720 degrees (= 450 degrees + 270 degrees). In this case, a shape in which one side surface of the rectangular hole is open can be exemplified.

<Specific example 6>
FIG. 20 is a perspective view showing an example of a rib in which a cylinder and a hexahedron are joined as an object N provided on the base material I.

FIG. 20 shows the shape identification information of the operator and the point angle of each point in the rib where the cylinder and the hexahedron are joined.

<Specific example 7>
FIG. 21 is a perspective view showing an example of a rib in which an L-shaped member N3 is joined to the end of a hexahedron as an object N provided on the base material I.

FIG. 21 shows the shape identification information of the operator and the point angle of each point in the rib in which the L-shaped member N3 is joined to the end of the hexahedron.

<Specific example 8>
FIG. 22 is a perspective view showing an example of a fillet in the object N.

FIG. 22 shows the shape identification information of the operator and the point angle of each point in the fillet in the object N.

<Specific example 9>
23A and 23B are perspective views showing an example of a rectangular hole H3 and an example of a circular hole H4 provided in the object N, respectively.

FIGS. 23A and 23B show the shape identification information of the operator and the point angle of each point in the rectangular hole H3 and the circular hole H4 provided in the object N.

<Specific example 10>
FIG. 24 is a perspective view showing an example of a rib in which a cylinder and a right-angled triangular prism are joined as an object N provided on the base material I.

FIG. 24 shows the shape identification information of the operator and the point angle of each point in the rib where the cylinder and the triangular prism are joined. The point angle of the points constituting the right triangle of the right triangle is 270 degrees, and the point angles φ1 and φ2 of the points constituting the base angles θ1 and θ2 (45 degrees in this example) of the right triangle exceed 360 degrees (base angle). It is a value (405 degrees in this example) of θ1 and θ2 exceeding 0 degrees and less than 450 degrees (base angles θ1 and θ2 are less than 90 degrees).

(Information output)
In the output step, the control unit 110 outputs the shape of the object N specified in the shape specifying step to the display device 141 or the printing device 142.

Then, the specified three-dimensional shape information is sent to, for example, a CAD system and used in the CAD system.

(About this embodiment)
According to the present embodiment, the division information M1, M2, ... Each actor (A, B, K1), ..., Shape identification information (+1, -1, 0), point angle (A1 + A2 + A3) stored in the database DB. ), ... And the areas S1, S2, ... Of the surfaces (M1, M2, ...) Can be connected to a plurality of surfaces (M1, M2, ...) To specify the three-dimensional shape of the object N. Therefore, it is possible to specify which category and what shape the surface shape of the segmented object N is, which can be used in the CAD technical field (particularly AI technology). Is possible.

In the present embodiment, the control unit 110 uses the image processing technique to obtain shape identification information (+ 1, -1, 0), point angles (A1 + A2 + A3), ..., Actors (A,) for the classification information M1, M2, ... The shape of the object N is specified from B, K1), ... And the areas S1, S2, .... By doing so, the shape of the specified object N can be output, so that the user can output the operator (A, B, K1), ..., Shape for each of a plurality of surfaces (M1, M2, ...). It is possible to confirm the three-dimensional shape of the object N specified from the identification information (+1, -1,0), the point angle (A1 + A2 + A3), ..., And the areas S1, S2, ... Of the surface (M1, M2, ...). can.

In the present embodiment, the control unit 110 has a plurality of characteristic information (for example, areas S1, S2, ..., thickness h1, h2, ..., Curvature) related to the shapes of the plurality of surfaces (M1, M2, ...). The thickness h1, h2 ... And / or the curvature of the surface (M1, M2, ...) Of the surface (M1, M2, ...) Is further acquired, and the classification information M1, M2, ... And / or register in the database DB in association with the curvature.

By doing so, the division information M1, M2, ... Each actor (A, B, K1), ..., Shape identification information (+1, -1,0), point angle (A1 + A2 + A3), ... And the area of the surface (M1, M2, ...) S1, S2, ..., and the thickness of the surface (M1, M2, ...) H1, h2 ... And / or the curvature of the surface (M1, M2, ...). The shape of the object N can be easily specified.

In the present embodiment, the control unit 110 uses an image processing technique to perform actors (A, B, K1), ..., Shape identification information (+1, -1, 0), and points for the division information M1, M2, .... The shape of the object N is specified from the angle (A1 + A2 + A3), ..., Area S1, S2, ..., Thickness h1, h2, ... And / or curvature.

By doing so, whether the thickness of one surface is equal to the thickness of the other surface to be adjacent, or / and whether the curvature of one surface is equal to the curvature of the other surface to be adjacent. The accuracy of identifying another surface adjacent to one surface can be improved.

In the present embodiment, the control unit 110 may continuously process the division information by a single processor, but the division information M1, M2, ... Is divided into a plurality of processing units. It is preferable that the control unit 110 is provided with the same processor and performs parallel processing by a plurality of processors. For example, a plurality of processors can be sequentially or randomly assigned to the division information M1, M2, .... By assigning a plurality of processors to the division information M1, M2, ... In this way, the actors (A, B, K1), ... The three-dimensional shape of the object N can be specified by the shape identification information (+1, -1, 0), the point angle, the areas S1, S2, ... Specifically, the first processor is assigned to the division information M1 to M1000, the second processor is assigned to the division information M2001 to M3000, and the third processor is assigned to the division information M1001 to M2000, respectively, and the first processor and the second processor are assigned. Even if parallel processing is performed by the processor and the third processor, the three-dimensional shape of the object N can be easily specified from the actuator, the shape identification information, the point angle, and the area. By doing so, parallel processing can be easily performed, and as a result, further high-speed processing can be realized with a simple control configuration.

The present invention is not limited to the embodiments described above, and can be implemented in various other forms. Therefore, such embodiments are merely exemplary in all respects and should not be construed in a limited way. The scope of the present invention is set forth by the claims and is not bound by the text of the specification. Further, all modifications and modifications that fall within the equivalent scope of the claims are within the scope of the present invention.

The present invention can be applied to the technical field of CAD, particularly AI technology.

100 Shape data processing device 110 Control unit 120 Storage unit 121 Recording device 122 Memory device 130 Reading unit 131 Reading device 140 Output unit 141 Display device 142 Printing device A, ... Each point A1, ... Line angle DB Database DT1 Shape specification data DT1a Processed shape identification data M1, ... Category information N Object P Shape data processing program Q1 Three-dimensional CAD data input means Q2 Shape recognition means Q3 Judgment means Q4 Acquisition means Q5 Point angle calculation means Q6 Actor detection means Q7 Registration means Q8 Shape specifying means Q9 Output means S1, ... Area h1, ... Thickness

Claims (6)

1. A determination means for determining a plurality of shape identification information corresponding to each of the shapes of the plurality of surfaces in an object whose surface is divided into a plurality of surfaces.
   An acquisition means for acquiring the area of the surface among the plurality of characteristic information related to the shapes of the plurality of surfaces, and
   A point angle calculating means for calculating a point angle obtained by summing the line angles between lines adjacent to each point on the plurality of surfaces, and a point angle calculating means.
   An operator detecting means for detecting an operator composed of two adjacent points among the above points and a line between the two points.
   A shape data processing apparatus comprising: a registration means for registering classification information corresponding to a plurality of surfaces in a database in association with the shape identification information, the point angle, the operator, and the area.
2. The shape data processing apparatus according to claim 1.
   The acquisition means further acquires the thickness of the surface among the plurality of characteristic information related to the shapes of the plurality of surfaces.
   The registration means is a shape data processing apparatus characterized in that the classification information is further associated with the thickness and registered in a database.
3. The shape data processing apparatus according to claim 1 or 2.
   It is equipped with a plurality of processors that process the classification information in a plurality of divisions.
   A shape data processing apparatus characterized in that parallel processing is performed by the plurality of processors.
4. This is a shape data processing method performed by a shape data processing device.
   A determination step in which the determination means determines a plurality of shape identification information corresponding to each of the shapes of the plurality of surfaces in an object whose surface is divided into a plurality of surfaces.
   An acquisition step in which the acquisition means acquires the area of the surface among the plurality of characteristic information related to the shapes of the plurality of surfaces.
   A point angle calculation step in which the point angle calculation means calculates a point angle by summing up the line angles between lines adjacent to each point on the plurality of surfaces.
   An operator detection step in which the operator detecting means detects an operator consisting of two adjacent points among the two points and a line between the two points.
   A shape data processing method, wherein the registration means includes a registration step of registering classification information corresponding to the plurality of surfaces in a database in association with the shape identification information, the point angle, the operator, and the area. ..
5. The shape data processing method according to claim 4.
   In the acquisition step, the thickness of the surface among the plurality of characteristic information related to the shapes of the plurality of surfaces is further acquired.
   In the registration step, the shape data processing method is characterized in that the classification information is further associated with the thickness and registered in a database.
6. A shape data processing program for causing a computer to execute each step of the shape data processing method according to claim 4 or 5.

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