WO2021024515A1

WO2021024515A1 - Shape data processing device, shape data processing method, and shape data processing program

Info

Publication number: WO2021024515A1
Application number: PCT/JP2020/002342
Authority: WO
Inventors: 光一西浦; スマディジエン
Original assignee: インテグラル・テクノロジー株式会社
Priority date: 2019-08-06
Filing date: 2020-01-23
Publication date: 2021-02-11
Also published as: JP7189584B2; JPWO2021024515A1; WO2021024367A1

Abstract

This shape data processing device, this shape data processing method, and this shape data processing program determine a plurality of shape identification information pieces corresponding respectively to the shapes of a plurality of faces of an object for which the surface has been segmented into the plurality of faces. A plurality of characteristic information pieces relating respectively to the plurality of face shapes are acquired. The determined shape identification information pieces and the acquired characteristic information pieces are registered in a database in association with an adjacent segment information piece corresponding to an adjacent segment which is adjacent to a given segment, for each segment information piece corresponding to the given segment. Or, the determined plurality of shape identification information pieces are converted into image elements corresponding to the plurality of shape identification information pieces, shape identification image data pieces are generated in a predetermined prescribed order from the converted image elements, and the generated shape identification image data pieces are registered in the database in the prescribed order.

Description

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

The present invention relates to a shape data processing apparatus, 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: Computer Aided Engineering) such as structural analysis by using a plurality of symbols (+,-, 0). It is disclosed.

International Publication No. 2017/175349

By the way, in the technical field of CAD (Computer-Aided Design: computer-aided design), it is desired to output the shape of an object by using the determination result of the surface shape of the classified object.

However, in the disclosed technology 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 can be used in the technical field of CAD. The reality is that there is no such thing.

Therefore, the present invention can specify which category and what shape the surface shape of the classified object is, and can be used in the technical field of CAD. An object of the present invention is to provide a shape data processing apparatus, a shape data processing method, and a shape data processing program.

In order to solve the above problems, the present invention has the following first and second aspects of shape data processing apparatus, first and second aspects of shape data processing methods, and first and second aspects of shape data processing. Provide a program.

(1-1) Shape Data Processing Device of the First Aspect The shape data processing device according to the first aspect of the present invention corresponds to each of the shapes of the plurality of surfaces in an object whose surface is divided into a plurality of surfaces. A determination means for determining a plurality of shape identification information, an acquisition means for acquiring a plurality of characteristic information related to the shapes of the plurality of surfaces, and the shape identification information and the acquisition means determined by the determination means. It is characterized by including a registration means for registering the acquired characteristic information in a database in association with the adjacent division information corresponding to the adjacent division adjacent to the division for each division information corresponding to the division.

(1-2) Shape data processing method of the first aspect The shape data processing method according to the first aspect of the present invention corresponds to each of the shapes of the plurality of surfaces in an object whose surface is divided into a plurality of surfaces. A determination step for determining a plurality of shape identification information, an acquisition step for acquiring a plurality of characteristic information related to the shapes of the plurality of surfaces, and the shape identification information and the acquisition step determined in the determination step. It is characterized by including a registration step of associating the acquired characteristic information with the adjacent division information corresponding to the adjacent division adjacent to the division and registering the acquired characteristic information in the database for each division information corresponding to the division.

(1-3) Shape data processing program according to the first aspect The shape data processing program according to the first aspect of the present invention causes a computer to execute each step of the shape data processing method according to the first aspect of the present invention. belongs to.

(2-1) Shape Data Processing Device of the Second Aspect The shape data processing device according to the second aspect of the present invention corresponds to each of the shapes of the plurality of surfaces in an object whose surface is divided into a plurality of surfaces. A determination means for determining a plurality of shape identification information, a conversion means for converting the plurality of shape identification information determined by the determination means into image elements corresponding to the plurality of shape identification information, and a conversion means for converting the plurality of shape identification information. The generation means for generating the image data for shape identification from the said image elements in a predetermined order, and the image data for shape identification generated by the generation means are registered in the database in the predetermined order. It is characterized by having a registration means.

(2-2) Shape Data Processing Method of the Second Aspect The shape data processing method according to the second aspect of the present invention corresponds to each of the shapes of the plurality of surfaces in an object whose surface is divided into a plurality of surfaces. A determination step for determining a plurality of shape identification information, a conversion step for converting the plurality of shape identification information determined in the determination step into image elements corresponding to the plurality of shape identification information, and a conversion step for converting the plurality of shape identification information. The generation step of generating the image data for shape identification from the image elements in a predetermined order and the image data for shape identification generated in the generation step are registered in the database in the predetermined order. It is characterized by including a registration step.

(2-3) Shape data processing program according to the second aspect The shape data processing program according to the second aspect of the present invention causes a computer to execute each step of the shape data processing method according to the second aspect of the present invention. belongs to.

According to the present invention, it is possible to specify which category and what shape the surface shape of the classified object is, and thereby it can be used in the technical field of CAD. It becomes.

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 a surface of a part of the division information 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 object. FIG. 9 is a chart schematically showing an example of a data structure of a part of the shape data of the object shown in FIG. 8 in the database. FIG. 10 is a schematic diagram showing an example of an input screen for inputting change values of shape identification information and characteristic information. FIG. 11 is a block diagram showing another example of the hardware configuration of the shape data processing device. FIG. 12 is a flowchart showing another example of the processing procedure of the shape data processing apparatus. FIG. 13 illustrates the processing result when the determination processing is applied to the specific shape portion of the object. FIG. 14 is a chart schematically showing an example of image data of a part of the object shown in FIG. 13 in the database and a data structure of a predetermined arrangement order corresponding thereto. FIG. 15 is an output image output using image data for shape identification composed of the image elements shown in FIG.

Hereinafter, embodiments according to the present invention will be described with reference to the drawings. In the following description, the same parts are designated by the same reference numerals. Their names and functions are the same. Therefore, the detailed description of them will not be repeated.

<First Embodiment>
[Hardware configuration of the shape data processing device according to the first embodiment]
First, the hardware configuration of the shape data processing device 100 according to the first 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 by the control unit 110 by executing the shape data processing program Pa stored 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 Pa stored in the recording device 121 in advance 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 Pa acquired from the reading unit 130 is stored in the recording device 121 in advance. 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 Pa is pre-recorded on the recording medium M. The recording medium M may be a recording disc such as a CD-ROM, or any other recording medium. Further, the shape data processing program Pa is not limited to the one acquired via a recording medium such as a CD-ROM, and may be downloaded via a communication means such as the Internet.

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

The control unit 110 includes three-dimensional CAD data input means Qa1, shape recognition means Qa2, determination means Qa3, acquisition means Qa4, registration means Qa5, reception means Qa6, specific means Qa7, and output means Qa8. It functions as a means to prepare. That is, the shape data processing program Pa controls a step including a three-dimensional CAD data input step, a shape recognition step, a determination step, an acquisition step, a registration step, a reception step, a specific step, and an output step. Let unit 110 execute.

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

In an example of the processing procedure of the shape data processing device 100, each processing of three-dimensional CAD data input, shape recognition, shape identification information determination, characteristic information acquisition, database registration, change acceptance, shape identification, and information output is performed.

(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 the 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 circumference curvature, outer circumference length, fixed points on the outer circumference, length ratio of paired outer circumference pairs, outer circumference circular shape, cylindrical shape, sphericality, internal angle of fixed points, etc. Includes area, in-plane normal angle difference, surface continuity, perimeter 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": Twisted uneven plate with holes (2) "Draw bead": Strip-shaped uneven part to be made on a flat surface (3) "Fillet": Sharpened corners 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 surface is classified based on the acquired information and features. After acquiring the data and calculating the characteristics of each surface, each surface 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, 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 points on the outer circumference, the length ratio of the paired outer circumference pair, the outer circumference Inspect the circular shape, the inner 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, a complex part consisting of multiple surfaces is recognized. 2D holes on the plate shape 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 stored in 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 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 that constitutes an object in 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 on the object, and each of the plurality of surfaces is given 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 a plurality of surfaces (surfaces). ..

FIG. 3 is an explanatory diagram showing an example of the surface of the division information F12 of a part of the object. The surface shown in FIG. 3 illustrates the surface of the classification information F12 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 length L1 length D) are registered for each classification 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 Cross product calculation step to obtain the outer product vector by the normal vector (out-of-plane vector) of the surface (reference surface) of the first division information and the tangential vector in which the surface of the first division information and the surface of the second division information are in contact with each other. And 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 second for the surface of the first division information based on the calculation result of the inner product calculation step. It includes a determination step of determining the surface shape of the surface of the classification 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 the surface of the first division information F1 (reference surface), and another surface of the other division information adjacent to the surface is used as the surface of the second division information F2. (S1). Here, the plane (reference plane) of the first division information F1 is basically a plane. In the outer product calculation step, as shown in FIGS. 4 to 6, the normal vector (out-of-plane vector) A of the surface (reference surface) of the first division information F1 and the surface and the second division information of the first division information F1. The outer product vector D is obtained from the vector B in the tangential direction in which the surface of F2 is in contact.

Next, in the inner product calculation step, the inner product of the outer product vector D obtained in the outer product calculation step and the normal vector (outside vector) C of the surface of the second division information F2 is obtained (S2), and the calculation result is determined. Enter in.

In the determination step, the surface shape of the surface of the second division information F2 with respect to the surface of the first division information F1 is determined based on the input calculation result.

Specifically, when it is determined whether or not the calculation result is a positive value (S3) and the calculation result shows a positive value (S3: Yes), the surface of the second division information F2 is concave (FIG. 4). (See) to determine the shape identification information (+1) (S4). On the other hand, when the calculation result is not a positive value (S3: No), it is determined whether or not the calculation result is a negative value (S5), and when the calculation result shows a negative value (S5: Yes). , The shape identification information (-1) is determined (S6) by using the surface of the second division information F2 as a convex surface (see FIG. 5). Further, when the calculation result is not a negative value (step S5: No), it is determined whether or not the calculation result is a zero value (S7), and when the calculation result indicates a zero value (S7: Yes). ), The shape identification information (0) is determined on the assumption that the surface of the second division information F2 is a plane continuous with the surface of the first division information F1 (see FIG. 6) (S8). If No is determined even in S7, error processing (S11) is executed to move to S9.

After that, it is confirmed whether or not the processing of all the classification information surfaces is completed (S9), and if the processing of all the classification information surfaces is not completed (S9: Yes), the process returns to S1. Repeat the process. On the other hand, when the processing of all the classification information surfaces is completed (S9: No), the surface shape determination processing is completed at that point.

That is, in the present embodiment, as a result of the inner product calculation, the surface of the adjacent surface that bites into the surface when viewed from the reference surface always has a negative value, and the surface that extends outside the surface always has a positive value. I am using.

(Acquisition of characteristic information)
In the acquisition step, the control unit 110 acquires a 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. Examples of the characteristic information include the width, length, curvature of the surface (surface), and the coordinates of the inflection point at which the shape is switched within the surface (surface).

(Database registration)
In the registration step, the control unit 110 sets the shape identification information (+1, -1, 0) determined in the determination step and the characteristic information acquired in the acquisition step adjacent to each other for each division information corresponding to the division. It is registered in the database DB in association with the adjacent classification information corresponding to the classification.

Specifically, in the registration step, the shape identification information of the surface when the calculation result shows a positive value (+1), the shape identification information of the surface when the calculation result shows a negative value (-1), and the calculation result The shape identification information of the surface when shows a value of zero is classified by (0), and these shape identification information and the corresponding characteristic information are registered in the database DB in association with the adjacent classification information for each classification information. As a result, the shape of the object can be extracted (that is, specified) by the combination of these shape identification information (+1, -1, 0) in the subsequent processing such as search.

FIG. 8 illustrates the processing result when the above determination processing is applied to the specific shape portion of the object 10. In the example shown in FIG. 8, the result of applying the above determination process to the rib shape is shown, and the result of the inner product calculation is positive (+) on the surface of the rounded thick portion (fillet) which is the base of the rising portion of the rib. ), The shape identification information is +1 and the result of the inner product calculation is minus (−) and the shape identification information is -1 on the surface of the tip (end) of the rib.

FIG. 9 shows a part of the shape data of the object 10 shown in FIG. 8 in the database DB [classification information F11 to F22, shape identification information (+1, -1, 0), adjacent classification information F11 to F22, characteristic information (characteristics). It is a chart which shows an example of the data structure of the value 1 to characteristic value n) (n is an integer of 2 or more)].

In the database DB shown in FIG. 9, for example, the classification information F11 has -1, +1, -1,0 as shape identification information, ..., F12, F18, ... As adjacent classification information, and a width W = 20 mm as a characteristic value 1. The length D = 10 mm is registered as the characteristic value 2, the curvature = 0 and the like are registered as the characteristic value 3. Hereinafter, shape data is also registered in F12 to F22 in the same manner.

(Change reception)
In the reception step, the control unit 110 receives an input operation for changing the shape identification information (+1, -1, 0) and / or the characteristic information (characteristic value 1 to characteristic value n). In this example, change values of shape identification information (+1, -1, 0) and characteristic information (characteristic value 1 to characteristic value n) are accepted.

FIG. 10 is a schematic diagram showing an example of an input screen G for inputting change values of shape identification information (+1, -1, 0) and characteristic information (characteristic value 1 to characteristic value n).

In the example shown in FIG. 10, the input screen G is divided into a first input screen G1 and a second input screen G2. On the first input screen G1, the classification information (F22 in the illustrated example) is input by the user, and when the OK button BT1 is operated, the second input screen G2 is displayed.

On the second input screen G2, adjacent classification information (F21, F16, F19, F12 in the illustrated example) corresponding to the classification information (F22 in the illustrated example) input on the first input screen G1 is displayed. In addition, shape identification information (0, -1, 0, -1 in the illustrated example) and characteristic information (width 20 mm, length in the illustrated example) corresponding to the classification information (F22 in the illustrated example) input on the first input screen G1. 18 mm, curvature 0, ..., Inflection point coordinates) are displayed so that they can be changed and input. When the shape identification information and the characteristic information are changed by the user and the OK button BT2 is operated, the change acceptance process ends.

(Shape identification)
In the specific step, the control unit 110 receives shape identification information (+1, -1, 0), characteristic information (characteristic value 1 to characteristic value n), and adjacent classification information for each division information (F11 to F22) stored in the database DB. From (F11 to F22), the classification information (F11 to F22) and the adjacent classification information (F11 to F22) are connected to specify the shape of the object 10. For example, the surface of the division information F22 is a plane (curvature 0) having a width W of 20 mm and a length D of 18 mm, is adjacent to the surfaces of the division information F21 and F19 in a plane, and is adjacent to the surfaces of the division information F16 and F12. It can be seen that they are adjacent by a convex surface. Hereinafter, the shape of the object 10 can be specified by performing the recognition processing in the same manner for the other surfaces adjacent to the classification information F22 and all the surfaces adjacent to the classification information F11 to F21.

Then, in the specific step, the control unit 110 determines the object 10 by changing the shape identification information (+1, -1, 0) and / or the characteristic information (characteristic value 1 to characteristic value n) changed in the reception step. Identify the shape of.

(Information output)
In the output step, the control unit 110 outputs the shape of the object 10 specified in the specific step to the display device 141 or the printing device 142.

(About the first embodiment)
According to the first embodiment, a plurality of shape identification information (+1, -1, 0) corresponding to each of the shapes of the plurality of surfaces in the object 10 is determined, and a plurality of shapes related to the shapes of the plurality of surfaces are determined. The characteristic information (characteristic value 1 to characteristic value n) is acquired, and the determined shape identification information (+1, -1, 0) and the acquired characteristic information (characteristic value 1 to characteristic value n) are classified into classification information (F11 to F22). ) Are registered in the database DB in association with the adjacent classification information (F11 to F22), so that the shape identification information (+1, -1, 0) and the characteristic information (characteristic value 1 to characteristic value n) are stored in the classification information (F11 to F11). It can be associated with each F22). Therefore, it is possible to specify which category and what shape the surface shape of the segmented object 10 is, which makes it possible to use it in the technical field of CAD. Further, since the classification information (F11 to F22) is associated with the adjacent classification information (F11 to F22), the connection between the classification information (F11 to F22) and the adjacent classification information (F11 to F22) can be recognized. As a result, the shape of the object 10 can be easily specified. Moreover, even if the object 10 has a complicated shape, it can have a simple data structure, which makes it possible to simplify the control configuration and, by extension, increase the processing speed.

In the present embodiment, the control unit 110 includes shape identification information (+1, -1, 0), characteristic information (characteristic value 1 to characteristic value n), and adjacent to each division information (F11 to F22) stored in the database DB. The shape of the object 10 is specified by connecting the classification information (F11 to F22) and the adjacent classification information (F11 to F22) from the classification information (F11 to F22), and the shape of the specified target 10 is output. By doing so, the user can use the shape identification information (+1, -1,0), the characteristic information (characteristic value 1 to the characteristic value n), and the adjacent classification information (characteristic value 1 to characteristic value n) for each division information (F11 to F22) stored in the database DB. The shape of the object 10 output from F11 to F22) can be confirmed.

By the way, when designing a new object from the current object 10 (so-called model change), it is desired to design a new object by easily changing the shape and / or shape characteristics of the current object 10. It is rare.

In this regard, in the present embodiment, the control unit 110 accepts and changes the input operation for changing the shape identification information (+1, -1, 0) and / or the characteristic information (characteristic value 1 to characteristic value n). The shape of the object 10 is specified by the changed value of the shape identification information (+1, -1, 0) and / or the characteristic information (characteristic value 1 to characteristic value n). By doing so, it is possible to easily change the shape and / or characteristics of the current object 10 and easily design a new object.

In the present embodiment, the control unit 110 may include a plurality of processors that separately process the classification information (F11 to F22). In this case, the control unit 110 can perform parallel processing by a plurality of processors. For example, the first processor is assigned to the division information F11 to F14, the second processor is assigned to the division information F15 to F18, and the third processor is assigned to the division information F19 to F12, respectively, and the first processor, the second processor, and the second processor are assigned. Parallel processing can be performed by 3 processors. By doing so, parallel processing can be easily performed, and thereby, further high-speed processing can be realized with a simple control configuration.

<Second Embodiment>
[Hardware configuration of the shape data processing device according to the second embodiment]
First, the hardware configuration of the shape data processing device 100 according to the second embodiment will be described below with reference to FIG.

FIG. 11 is a block diagram showing another example of the hardware configuration of the shape data processing device 100.

As shown in FIG. 11, the control unit 110 realizes various functions required for the control unit 110 by executing the shape data processing program Pb stored (installed) in advance in the recording device 121 of the storage unit 120. It is configured as follows. Specifically, the control unit 110 performs various processes by loading and executing a software program such as the shape data processing program Pb previously stored in the recording device 121 on the RAM 122b of the memory device 122. The shape data processing program Pb acquired from the reading unit 130 is stored in the recording device 121 in advance. The shape data processing program Pb is recorded in advance on the recording medium M. The shape data processing program Pb is not limited to the one acquired via a recording medium such as a CD-ROM, and may be downloaded via a communication means such as the Internet.

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

The control unit 110 includes three-dimensional CAD data input means Qb1, determination means Qb2, conversion means Qb3, generation means Qb4, registration means Qb5, shape specifying means Qb6, data reception means Qb7, and output means Qb8. Functions as a means of providing. That is, the shape data processing program Pb includes a three-dimensional CAD data input step, a determination step, a conversion step, a generation step, a registration step, a shape specifying step, a data reception step, and an output step. Let the control unit 110 execute.

[Processing procedure of the shape data processing device according to the second embodiment]
FIG. 12 is a flowchart showing another example of the processing procedure of the shape data processing device 100.

In another example of the processing procedure of the shape data processing device 100, each processing of three-dimensional CAD data input, shape identification information determination, image element conversion, image data generation, database registration, shape identification, data reception, and information output is performed.

The determination step is the same as the determination step described with reference to FIGS. 3 to 7 in the above-described first embodiment, and the description thereof will be omitted here.

FIG. 13 illustrates the processing result when the above determination processing is applied to the specific shape portion of the object 10 as in the first embodiment. In the example shown in FIG. 13, the result of applying the above determination process to the rib shape is shown, and the result of the inner product calculation is positive (+) on the surface of the rounded thick portion (fillet) which is the base of the rising portion of the rib. ), The shape identification information is +1 and the result of the inner product calculation is minus (−) and the shape identification information is -1 on the surface of the tip (end) of the rib.

(Image element conversion)
In the conversion step, the control unit 110 corresponds the plurality of shape identification information (combination of -1, 0, +1) determined in the determination step to the plurality of shape identification information (combination of -1, 0, +1). Convert to image elements (M11 to M22 ...). Here, the image element (Mxy: x, y is an integer of 1 or more) may be any as long as the individual image elements can be distinguished from each other. For example, of hue, saturation, and lightness. Color images with different colors, monotone images with different brightness from white to black, horizontal line patterns, vertical line patterns, lattice patterns, diagonal line patterns, dot patterns, and other pattern patterns with different patterns. Images, letters, numbers, and kanji. Examples include character images and text images in which characters such as hiragana and katakana are different from each other, or image elements such as a combination image in which at least two of these are combined.

(Image data generation)
In the generation step, the control unit 110 generates image data MD for shape identification from the image elements (M11 to M22 ...) Converted in the conversion step in a predetermined arrangement order. In this example, the predetermined arrangement order is the arrangement order from one end to the other end of the surfaces adjacent to each other in the predetermined arrangement direction among the plurality of surfaces. Here, as the arrangement order, for example, the arrangement order of the rows along the first horizontal direction H1, the arrangement order of the columns along the second horizontal direction H2 orthogonal to the first horizontal direction H1, the vertical direction V, and the vertical direction. The order of the rows on one side (front side) along the direction V and the order of the rows on the other side (back side) along the vertical direction V can be mentioned.

(Database registration)
In the registration step, the control unit 110 registers the image data MDs for shape identification generated in the generation step in the database DB in a predetermined order. As a result, in the subsequent processing such as shape identification, the shape of the object can be specified by the image pattern of the image data MD for shape identification. In this example, the control unit 110 registers the image data MD for shape identification generated in the generation step in the database DB in association with a predetermined arrangement order.

FIG. 14 is a chart schematically showing an example of an image data MD for shape identification of a part of the object 10 shown in FIG. 13 in the database DB and a corresponding data structure in a predetermined arrangement order.

In the database DB shown in FIG. 14, for example, in the first row along the first horizontal direction H1,
The shape identification information (-1, + 1, -1, 0) corresponding to the classification information F11 is "red" as an image element (M11).
The shape identification information (-1, + 1, -1, + 1) corresponding to the classification information F12 is "yellowish red" as an image element (M12).
The shape identification information (-1, -1, -1, + 1) corresponding to the classification information F13 is "yellow" as an image element (M13).
The shape identification information (-1, -1, -1, -1) corresponding to the classification information F14 is "yellowish green" as an image element (M14).
The shape identification information (-1, -1, +1, -1) corresponding to the classification information F15 is "green" as an image element (M15).
The shape identification information (+1, -1, +1, -1) corresponding to the classification information F16 is "blue-green" as an image element (M16).
The shape identification information (-1, ..., -1, + 1) corresponding to the classification information F17 is registered as an image element (M17) in "blue", ... In the image data MD for shape identification.

Further, in the k-th column (k is an integer of 1 or more) along the second horizontal direction H2,
The shape identification information (-1, + 1, -1, 0) corresponding to the classification information F11 is "red" as an image element (M11).
In the k + 1 column along the second horizontal direction H2,
The shape identification information (-1, + 1, -1, + 1) corresponding to the classification information F12 is "yellowish red" as an image element (M12).
In the k + 2 row along the second horizontal direction H2,
The shape identification information (-1, -1, -1, -1) corresponding to the classification information F14 is "yellowish green" as an image element (M14).
In the k + 3 row along the second horizontal direction H2,
The shape identification information (+1, -1, +1, -1) corresponding to the classification information F16 is "blue-green" as an image element (M16).
In the k + 4 row along the second horizontal direction H2,
The shape identification information (-1, ..., -1, + 1) corresponding to the classification information F17 is registered as an image element (M17) in "blue", ... In the image data MD for shape identification.

Further, in the m-th row (m is an integer of 1 or more) along the vertical direction V of the surface on one side (front side),
The shape identification information (-1, 0, -1, 0) corresponding to the classification information F18 is "blue-purple" as an image element (M18).
In the m + 1 row along the vertical direction V,
The shape identification information (0,0, -1,0) corresponding to the classification information F19 is "purple" as an image element (M19).
The shape identification information (0, -1, 0, -1) corresponding to the classification information F20 is "purple red" as an image element (M20).
The shape identification information (-1, -1, 0, -1) corresponding to the classification information F21 is "brown" as an image element (M21).
In the m + 2 row along the vertical direction V,
As the shape identification information (-1, ..., -1,0) corresponding to the classification information F22, "skin color", ... As an image element (M22) is registered in the image data MD for shape identification.

FIG. 15 is an output image output using the image data MD for shape identification including the image elements M11, ..., M22, ... Shown in FIG. The image data MD for shape identification shown in FIG. 15 is a pattern image for convenience of display, but is actually a color image. However, the image data MD for shape identification may be a pattern image as described above.

(Shape identification)
In the shape identification step, the control unit 110 identifies the shape of the object 10 from the image data MD for shape identification by using the image processing technique. Conventionally known image processing techniques can be used. As the image processing technology, an image processing technology using AI (artificial intelligence) can be exemplified. Machine learning is used as the image processing technology by AI. Machine learning finds rules such as image trends and features from a huge amount of image data, and analyzes and predicts from those rules. In the present embodiment, shape identification for shape information (for example, rib shape information) is performed by shape information (for example, rib shape information), image data for shape identification composed of corresponding image elements, and a predetermined arrangement order. Let AI learning software learn the arrangement pattern of each image element in the image data for use. Thereby, the control unit 110 can specify the shape (for example, the rib shape as shown in FIG. 13) from the arrangement pattern of each image element in the image data for shape identification.

(Data reception)
In the data reception step, the control unit 110 provides characteristic information such as the width, length, curvature, and inflection point coordinates at which the shape is switched within the surface (surface) with respect to the shape of the specified object 10. Accepts input operations to change.

(Information output)
In the output step, the control unit 110 changes the shape of the specified object 10 into the shape of the characteristic information received in the data reception step and outputs the shape to the display device 141 or the printing device 142.

(About the second embodiment)
According to the second embodiment, 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 a plurality of surfaces (surfaces) is determined. The determined plurality of shape identification information (combination of -1, 0, +1) is converted into image elements (M11 to M22 ...) Corresponding to each of the plurality of shape identification information (combination of -1, 0, +1). Since the image data MD for shape identification is generated from the converted image elements (M11 to M22 ...) in a predetermined order, the image data MD for shape identification is generated by using an image processing technique (particularly an image processing technique by AI). The shape of the object 10 can be specified from. Therefore, it is possible to specify which category and what shape the surface shape of the segmented object 10 is, which makes it possible to use it in the technical field of CAD.

In the present embodiment, the predetermined arrangement order is the arrangement order from one end to the other end of the surfaces adjacent to each other in a predetermined arrangement direction (for example, the first horizontal direction H1) among the plurality of surfaces. A control operation for generating an image data MD for shape identification can be easily realized.

Since the image element is an image element of a color image, the shape of the object 10 can be accurately specified by image processing technology (particularly image processing technology by AI).

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 shown by the claims and is not bound by the text of the specification. Furthermore, all modifications and modifications that fall within the equivalent scope of the claims are within the scope of the present invention.

The present invention relates to a technique for converting three-dimensional shape data into one-dimensional shape data or two-dimensional shape data, and can be particularly applied to the technical field of CAD.

10 Object 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 BT1 OK button BT2 OK button DB Database F1 First division information F2 2 Classification information F11 to F22 Classification information G Input screen G1 First input screen G2 Second input screen H1 First horizontal direction H2 Second horizontal direction M Recording medium M11 to M22 Image element MD Image data for shape identification Pa Shape data processing Program Pb Shape data processing program Qa1 3D CAD data input means Qa2 Shape recognition means Qa3 Judgment means Qa4 Acquisition means Qa5 Registration means Qa6 Reception means Qa7 Specific means Qa8 Output means Qb1 3D CAD data input means Qb2 Judgment means Qb3 Conversion means Qb4 Generation Means Qb5 Registration Means Qb6 Shape Identification Means Qb7 Data Receiving Means Qb8 Output Means V Vertical W Width

Claims

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 a plurality of characteristic information related to the shapes of the plurality of surfaces, and
A database in which the shape identification information determined by the determination means and the characteristic information acquired by the acquisition means are associated with the adjacent division information corresponding to the adjacent division adjacent to the division for each division information corresponding to the division. A shape data processing device comprising a registration means for registering in.
The shape data processing apparatus according to claim 1.
A specific means for identifying the shape of the object by connecting the classification information and the adjacent classification information from the shape identification information, the characteristic information, and the adjacent classification information for each of the classification information stored in the database.
A shape data processing apparatus further comprising an output means for outputting the shape of the object specified by the specific means.
The shape data processing apparatus according to claim 2.
Further provided with a receiving means for receiving an input operation for changing the shape identification information and / or the characteristic information.
The specific means is a shape data processing device characterized in that the shape of the object is specified by the shape identification information and / or the changed value of the characteristic information changed by the reception means.
The shape data processing apparatus according to any one of claims 1 to 3.
It is provided 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.
A determination step 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 step for acquiring a plurality of characteristic information related to the shapes of the plurality of surfaces, and
A database in which the shape identification information determined in the determination step and the characteristic information acquired in the acquisition step are associated with the adjacent division information corresponding to the adjacent division adjacent to the division for each division information corresponding to the division. A shape data processing method characterized by including a registration step to be registered in.
A shape data processing program for causing a computer to execute each step of the shape data processing method according to claim 5.
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.
A conversion means for converting the plurality of shape identification information determined by the determination means into image elements corresponding to the plurality of shape identification information, and
A generation means for generating image data for shape identification from the image elements converted by the conversion means in a predetermined order of arrangement.
A shape data processing apparatus including a registration means for registering image data for shape identification generated by the generation means in a database in a predetermined order.
The shape data processing apparatus according to claim 7.
The shape data processing apparatus, characterized in that the predetermined arrangement order is an arrangement order from one end to the other end of the surfaces adjacent to each other in a predetermined arrangement direction among the plurality of surfaces.
The shape data processing apparatus according to claim 7 or 8.
The shape data processing apparatus, wherein the image element is an image element of a color image.
A determination step 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.
A conversion step of converting the plurality of shape identification information determined in the determination step into image elements corresponding to the plurality of shape identification information, and a conversion step.
A generation step of generating image data for shape identification from the image elements converted in the conversion step in a predetermined order of arrangement.
A shape data processing method including a registration step of registering the image data for shape identification generated in the generation step in a database in a predetermined order.
A shape data processing program for causing a computer to execute each step of the shape data processing method according to claim 10.