Interference verifying device and method for verifying interference between parts within a device

• US 6,748,346 B2
• Filed: 12/27/2000
• Issued: 06/08/2004
• Est. Priority Date: 07/14/1998
• Status: Expired due to Fees

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: Ujiie, Kazuyuki
• Primary Examiner(s): Broda, esq., Samuel
• Assistant Examiner(s): PHAN, THAI Q
• Application Number:
  US09/748,369
• Publication Number:
  US 20040088144A1
• Time in Patent Office: 1,259 Days
• Field of Search: 703/1, 703/2, 703/7, 700/57, 700/255, 700/90, 700/97, 700/103, 219/121.64
• US Class Current: 703/1
• CPC Class Codes: G06T 19/20 Editing of 3D images, e.g. changing shapes or colours, aligning objects or positioning parts
• CPC Class Codes: G06T 2210/21 Collision detection, intersection
• CPC Class Codes: G06T 2219/2021 Shape modification

Abstract

The changed state of a shape of a transformable element of each part is preregistered to a library in an assembly simulation. When two parts collide with each other, the changed state of the element is selected according to an interference condition such as a material, a direction in which force is applied, etc., and the interference between parts is verified based on the selected shape after being changed.

Claims

1. An interference verifying device using a computer-aided design system for interference verification between parts in a device, comprising:

a simulation unit simulating a positional relationship among the parts by using shape information obtained as model data, generated by the computer-aided design system, indicating shapes of the parts;

a displaying unit displaying a simulated positional relationship among the parts on a screen;

a storing unit storing changed shape information of at least one part of the plurality of parts beforehand, the changed shape information indicating a changed shape of the at least one part after deformation;

a deformation unit changing a shape of the at least one part by replacing an original shape of the at least one part before deformation displayed on the screen with the changed shape of the at least one part after deformation indicated by the changed shape information; and

a verification unit verifying an interference state among the plurality of parts based on the changed shape displayed on the screen.

2. The interference verifying device according to claim 1, wherein said displaying unit displays the changed shape of the at least one part on the screen.

3. The interference verifying device according to claim 1, wherein said deformation unit determines, when said simulation unit is moving one of the plurality of parts and the moved part comes in contact with another part on the screen, whether at least one of the two parts in contact is transformable, and extracts the changed shape information of a transformable part from said storing unit.

4. The interference verifying device according to claim 3,

wherein said deformation unit restores the changed shape of the transformable part, when said simulation unit moves the moved part to the target position, to the original shape of the transformable part, and

wherein said verification unit verifies the interference state of the plurality of parts based on the original shape.

5. The interference verifying device according to claim 1,

wherein said storing unit stores a plurality of pieces of the changed shape information according to a plurality of predetermined interference conditions, and

wherein said deformation unit selects a piece of the changed shape information corresponding to an interference condition representing a state of two parts in contact from the plurality of pieces of the changed shape information.

6. The interference verifying device according to claim 5, wherein said storing unit stores the changed shape information by using at least one item of information among a material, an interference face, and an interference direction as the predetermined interference conditions.

7. The interference verifying device according to claim 1, wherein said storing unit stores the changed shape information corresponding to at least one of elastic deformation, a change of a shape of rigid body, and plastic deformation.

8. An interference verifying device using a computer-aided design system for verifying interference between parts in an assembly process of a device, comprising:

a simulation unit simulating a positional relationship of the parts by using shape information obtained as model data, generated by the computer-aided design system, indicating shapes of the parts;

a displaying unit displaying a simulated positional relationship among the parts on a screen;

a storing unit storing changed shape information of at least one part among the plurality of parts beforehand, the changed shape information indicating a changed shape of the at least one part after deformation;

a deformation unit changing a shape of the at least one part by replacing an original shape of the at least one part before deformation displayed on the screen with the changed shape of the at least one part after deformation indicated by the changed shape information, when said simulation unit moves one of the plurality of parts on an assembly route and the at least one part comes in contact with another part on the screen; and

a verification unit verifying an interference state among the plurality of parts based on the changed shape displayed on the screen.

9. An interference verifying device using a computer-aided design system for verifying interference between parts in a disassembly process of a device comprising:

a simulation unit simulating a positional relationship of the parts by using shape information obtained as model data, generated by the computer-aided design system, indicating shapes of the parts;

a displaying unit displaying a simulated positional relationship among the parts on a screen;

a storing unit storing changed shape information of at least one part among the plurality of parts beforehand, the changed shape information indicating a changed shape of the at least one part after deformation;

a deformation unit changing a shape of the at least one part by replacing an original shape of the at least one part before deformation displayed on the screen with the changed shape of the at least one part after deformation indicated by the changed shape information, when said simulation unit moves one of the plurality of parts on a disassembly route and the at least one part comes in contact with another part on the screen; and

a verification unit verifying an interference state among the plurality of parts based on the changed shape displayed on the screen.

10. An interference verifying device for interference verification using a computer-aided design system, comprising:

a simulation unit simulating positional information of first and second objects by using shape information of the first and second objects, the shape information being model data generated by the computer-aided design system and indicating shapes of the first and second objects;

a displaying unit displaying simulated positional information of the first and second objects on a screen;

a storing unit storing changed shape information of the first object beforehand, the changed shape information indicating a changed shape of the first object after deformation;

a deformation unit changing a shape of the first-object by replacing an original shape of the first object before deformation displayed on the screen with the changed shape of the first object after deformation indicated by the changed shape information, when the first object comes in contact with the second object on the screen; and

a verification unit verifying an interference state between the first and second objects based on the changed shape displayed on the screen.

11. A computer-readable storage medium on which is recorded a program for causing a computer to execute a process, said process comprising:

simulating a positional relationship of a plurality of parts by using shape information obtained as model data, generated by a computer-aided design system, indicating shapes of the parts;

displaying the simulated positional relationship among the parts on a screen;

storing changed shape information of at least one part of the plurality of parts beforehand, the changed shape information indicating a changed shape of the at least one part after deformation;

moving one of the plurality of parts on the screen;

changing a shape of at least one of two parts in contact on the screen, when a moved part comes in contact with another part on the screen, replacing an original shape of the at least one of the two parts before deformation displayed on the screen with the changed shape of the at least one of the two parts after deformation indicated by changed shape information of the at least one of the two parts; and

verifying an interference state among the plurality of parts based on the changed shape displayed on the screen.

12. A computer-readable storage medium on which is recorded a program for causing a computer to execute a process, said process comprising:

simulating positional information of first and second objects by using shape information of the first and second objects, the shape information being model data generated by the computer-aided design system and indicating shapes of the first and second objects;

a displaying unit displaying simulated positional information of the first and second objects on a screen;

storing changed shape information of the first object beforehand, the changed shape information indicating a changed shape of the first object after deformation;

moving the first object on the screen;

changing a shape of at least one of the first and second objects on the screen by replacing an original shape of the at least one of the first and second objects before deformation displayed on the screen with the changed shape of the at least one of the first and second objects after deformation indicated by changed shape information of the at least one of the first and second objects, when the first object comes in contact with the second object on the screen; and

verifying an interference state between the first and second objects based on the changed shape displayed on the screen.

13. An interference verifying method for verifying interference between parts within a device composed of a plurality of parts, comprising:

creating changed shape information of at least one of the parts beforehand, the changed shape information indicating a changed shape of the at least one of the parts after deformation;

simulating a positional relationship between the parts by using shape information obtained as model data, generated by a computer-aided design system, indicating shapes of the parts;

displaying the simulated positional relationship among the parts on a screen;

moving one of the plurality of parts on the screen;

changing a shape of at least one of two parts in contact on the screen, when a moved part comes in contact with another part on the screen, by replacing an original shape of the at least one of the two parts before deformation displayed on the screen with the changed shape of the at least one of the two parts after deformation indicated by changed shape information of the at least one of the two parts; and

verifying an interference state among the plurality of parts based on the changed shape displayed on the screen.

14. An interference verifying method, comprising:

creating changed shape information of at least one of first and second objects beforehand, the changed shape information indicating a changed shape of the at least one of the first and second objects after deformation;

simulating a positional relationship between the first and second objects using the shape information of the first and second objects, the shape information being model data generated by a computer-aided design system and indicating shapes of the first and second objects;

displaying simulated positional information of the first and second objects on a screen;

moving the first object on the screen;

changing a shape of at least one of the first and second objects on the screen by replacing an original shape of the at least one of the first and second objects before deformation displayed on the screen with the changed shape of the at least one of the first and second objects after deformation indicated by changed shape information of the at least one of the first and second objects, when the first object comes in contact with the second object on the screen; and

verifying an interference state between the first and second objects based on the changed shape displayed on the screen.

15. An interference verifying device for interference verification between parts in a device using a computer-aided design system, comprising:

simulation means for simulating a positional relationship among the plurality of parts by using shape information obtained as model data, generated by a computer-aided design system, indicating shapes of the parts;

display means for displaying simulated positional information among the parts on a screen;

storing means for storing changed shape information of at least one part of the plurality of parts beforehand, the changed shape information indicating a changed shape of the at least one part after deformation;

deformation means for changing a shape of the at least one part by replacing an original shape of the at least one part before deformation displayed on the screen with the changed shape of the at least one part after deformation indicated by the changed shape information; and

verification means for verifying an interference state among the plurality of parts based on the changed shape displayed on the screen.

16. An interference verifying device, comprising:

simulation means for simulating positional information of first and second objects by using shape information of the first and second objects, the shape information being model data generated by a computer-aided design system and indicating shapes of the first and second objects;

display means for displaying simulated positional information of the first and second objects on a screen;

storing means for storing changed shape information of the first object beforehand, the changed shape information indicating a changed shape of the first object after deformation;

deformation means for changing a shape of the first object by replacing an original shape of the at least one part before deformation displayed on the screen with the changed shape of the first object after deformation indicated by the changed shape information, when the first object comes in contact with the second object on the screen; and

verification means for verifying an interference state between the first and second objects based on the changed shape displayed on the screen.