Modeling method and system using solid data having functional structure and normal projection drawing dimensional format

• US 5,268,999 A
• Filed: 03/20/1992
• Issued: 12/07/1993
• Est. Priority Date: 05/30/1987
• Status: Expired due to Fees

• Current Assignee: Ricoh Company Limited
• Original Assignee: Ricoh Company Limited
• Inventors: Yokoyama, Terumichi
• Primary Examiner(s): Zimmerman, Mark K.
• Application Number:
  US07/859,625
• Time in Patent Office: 627 Days
• Field of Search: 364/518, 364/521, 364/522, 364/474.05, 364/474.24, 364/474.25, 364/474.01, 395/119, 395/120, 395/133, 395/141, 395/155, 395/161, 382/8, 382/9, 382/16, 382/25, 382/28
• US Class Current: 345/441
• CPC Class Codes: G06T 17/00 Three dimensional [3D] modelling, e.g. data description of 3D objects

Abstract

A modeling method for automatically designing an object model carries out the design in two basic steps of conceptual design and detailed design, and constituent element parameters and geometrical element parameters are defined with respect to the conceptual design and the detailed design based on an object material. The constituent element parameters describe the functional structure, that is, the shape and structure of a solid On the other hand, the geometrical element parameters describe the dimension data of the solid.

Claims

1. A modeling method for a modeling system capable of designing an object model, said modeling method comprising causing the modeling system to carry out the steps of:

conceptual designing in which functional elements including structure and shape of a solid are described as a combination of unit parts with reference to the shape and connections thereof without entering dimension data and

detailed designing in which geometrical elements including dimensions of the solid are described by coded topological elements in a normal projection of the solid without entering shape data, said coded topological elements being coded according to a predetermined sequence which is dependent on a direction in the normal projection so as to include a sequential number in the code,

said conceptual designing being carried out with respect to the solid in its entirety before said detailed designing.

2. A modeling method as claimed in claim 1 in which said unit parts comprise a main unit part and unit parts, said conceptual designing describing the solid in terms of the main unit part and the unit parts connected thereto, and said coded topological elements including a code portion which refers to the main unit or to the unit parts.

3. A modeling method as claimed in claim 2 in which said main unit part is a first defined face and in which said unit parts include at least one of a flange, a cutout and a hole.

4. A modeling method as claimed in claim 3 in which said step of conceptual designing comprises making a drawing of the solid.

5. A modeling method as claimed in claim 1 in which said detailed designing describes the geometrical elements of the solid by the coded topological elements which are in one of three normal projections respectively showing top, front and side views of the solid.

6. A modeling method as claimed in claim 5 in which said coded topological elements describe the geometrical elements of at least a face, an edge and a vertex of the solid in the normal projection.

7. A modeling method as claimed in claim 5 in which the normal projection includes dimension leader lines, said coded topological elements being written in the normal projection in correspondence with each of the dimension leader lines as pointers thereof for encoding dimension data on the solid.

8. A modeling method for a modeling system capable of designing an object model, said modeling method comprising causing the modeling system to carry out the steps of:

conceptual designing in which functional elements including structure and shape of a solid are described by constituent element parameters with reference to the shape and connections of a combination of unit parts making up the solid; and

detailed designing in which geometrical elements including dimensions of the solid are described by geometrical element parameters,

said solid being described in terms of composite parameters made up of the constituent element parameters and the geometrical element parameters,

said geometrical element parameters being coded topological elements in a normal projection of the solid, said coded topological elements being coded according to a predetermined sequence which is dependent on a direction in the normal projection so as to include a sequential number in the code.

9. A modeling method as claimed in claim 8 in which said coded topological elements describe the geometrical element parameters of at least a face, an edge and a vertex of the solid in the normal projection.

10. A modeling method as claimed in claim 8 in which the normal projection includes dimension leader lines, said coded topological elements being written in the normal projection in correspondence with each of the dimension leader lines as pointers thereof for encoding dimension data on the solid.

11. A modeling method for designing an object model, said modeling method comprising the steps of:

entering data related to a solid as a data base;

conceptual designing in which functional elements including structure and shape of the solid are described based on the data base with reference to the shape and connections of a combination of unit parts making up the solid; and

detailed designing in which geometrical elements including dimensions of the solid are described based on the data base;

said conceptual designing describing the solid as a connection of unit parts.

said step of entering data on the solid comprising the substeps of extracting dimension leader lines and dimensioning lines in a normal projection of the solid, recognizing coded topological elements, coded according to a predetermined sequence which is dependent on a direction in the normal projection as to include a sequential number in the code, written in vicinities of corresponding extracted dimension leader lines in the normal projection, recognizing dimension data written in vicinities of corresponding extracted dimension leader lines in the normal projection, recognizing dimension data written in vicinities of corresponding extracted dimensioning lines in the normal projection, and describing the solid as mapping and dimensioning descriptions based on the recognized coded topological elements and dimension data and input data describing shape and structure of the solid as a whole.

12. A modeling method for designing an object model, said modeling method comprising the steps of:

entering data related to a solid as a data base;

conceptual designing in which functional elements including structure and shape of the solid are described based on the data base with reference to the shape and connections of a combination of unit parts making up the solid;

detailed designing in which geometrical elements including dimensions of the solid are described based on the data base; and

said conceptual designing describing the solid as a combination of unit parts,

said step of entering data on the solid comprising the substeps of extracting dimension leader lines and dimensioning lines in a normal projection of the solid, recognizing coded topological elements, coded according to a predetermined sequence which is dependent on a direction in the normal projection as to include a sequential number in the code, written in vicinities of corresponding extracted dimension leader lines in the normal projection, recognizing dimension data written in vicinities of corresponding extracted dimensioning lines in the normal projection, and describing the solid as mapping and dimensioning descriptions based on the recognized coded topological elements and dimension data and input data describing shape and structure of the solid as a whole,

said normal projection of the solid being entered from an image reading apparatus which reads the normal projection written with the dimension leader lines and dimensioning lines,

said input data describing shape and structure of the solid as a whole being entered from an input device.

13. A modeling method as claimed in claim 12 in which said step of entering data on the solid comprises a further substep of eliminating contour lines of the solid in said normal projection read by the image reading apparatus.

14. A modeling method for designing an object model, said modeling method comprising the steps of:

entering data related to a solid as a data base;

conceptual designing in which functional elements including structure and shape of the solid are described based on constituent element parameters of the data base with reference to the shape and connections of a combination of unit parts making up the solid; and

detailed designing in which geometrical elements including dimensions of the solid are described based on geometrical element parameters of the data base,

said solid being described in terms of composite parameters make up of the constituent element parameters and the geometrical element parameters,

said geometrical element parameters being coded topological elements in a normal projection of the solid,

said step of entering data on the solid comprising the substeps of extracting dimension leader lines and dimensioning lines in the normal projection of the solid, recognizing coded topological elements, coded according to a predetermined sequence which is dependent on a direction in the normal projection as to include a sequential number in the code, written in vicinities of corresponding extracted dimension leader lines in the normal projection, recognizing dimension data written in vicinities of corresponding extracted dimensioning lines in the normal projection, and describing the solid as mapping and dimensioning descriptions based on the recognized coded topological elements and dimension data and input data describing shape and structure of the solid as a whole.

15. A modeling method as claimed in claim 14 in which said normal projection of the solid is entered from an image reading apparatus which reads the normal projection written with the dimension leader lines and dimensioning lines, and in which said input data describing shape and structure of the solid as a whole are entered from an input device.

16. A modeling method as claimed in claim 15 in which said step of entering data on the solid comprises a further substep of eliminating contour lines of the solid in said normal projection read by the image reading apparatus.

17. An input system for entering data on a solid for a modeling system which designs an object model, said input system comprising:

an image reading apparatus for entering an input image data by reading a normal projection of the solid, said normal projection including dimension leader lines and dimensioning lines;

an input device for entering input data related to shape and structure of the solid as a whole; and

a data processing apparatus supplied with the input image data from said input device for producing descriptions which functionally and geometrically describe the solid,

said data processing apparatus comprising extracting means for extracting the dimension leader lines and the dimensioning lines from the input image data, recognizing means for recognizing from the input image data coded topological elements, coded according to a predetermined sequence which is dependent on a direction in the normal projection so as to include a sequential number in the code, written in vicinities of corresponding dimension leader lines extracted by said extracting means and for recognizing from the input image data dimension data written in vicinities of corresponding dimensioning lines extracted by said extracting means, and editing means for editing the topological elements and the dimension data recognized by said recognizing means and the input data from said input device into said descriptions.

18. An input system as claimed in claim 17, which further comprises means for eliminating contour lines of the solid in said normal projection read by said image reading apparatus.

19. An input system as claimed in claim 17 in which said coded topological elements describe at least a face, an edge and a vertex of the solid in the normal projection.