METHOD OF CREATING MASTER DATA USED FOR INSPECTING CONCAVE-CONVEX FIGURE

• US 20090226073A1
• Filed: 06/19/2006
• Published: 09/10/2009
• Est. Priority Date: 06/28/2005
• Status: Active Grant

• Current Assignee: Bridgestone Corporation
• Original Assignee: Bridgestone Corporation
• Inventors: Kaneko, Tomoyuki, Honda, Norihiro
• Granted Patent: US 8,086,019 B2
• Time in Patent Office: Days
• US Class Current: 382/141
• CPC Class Codes: B60C 13/001 Decorating, marking or the like
• CPC Class Codes: G06F 18/28 Determining representative reference patterns, e.g. by averaging or distorting; Generating dictionaries
• CPC Class Codes: G06F 30/15 Vehicle, aircraft or watercraft design
• CPC Class Codes: G06T 7/001 using an image reference approach
• CPC Class Codes: G06V 10/772 Determining representative reference patterns, e.g. averaging or distorting patterns; Generating dictionaries

Abstract

The present invention provides a method of creating master data used for inspecting a concave-convex figure, which can create accurate master data with no variation.

In the present invention, an image of respective figures is cut out by selecting a figure from tire CAD drawings, and an arranging position of the figure is set in accordance with a distance in a radial direction form a tire center and a deformed angle in a circumferential direction of the tire from a designated location, so that a height of respective regions of the cut-out image is set. Then, the cut-out image is transformed into an image having a gray scale in accordance with the height by using the height information of respective regions, and, at an arranging position of the figure, the image having a gray scale is sampled by a predetermined interval in a radial direction from a tire center and is sampled by a predetermined angle interval in a circumferential direction of the tire, so that master data are created by the image in such a manner that a distance between intersecting points becomes equal.

Claims

1. A method of creating master data used for inspecting a concave-convex figure formed on a surface of tire from tire CAD drawings, which have figures deformed according to a tire size and deformed into a sector form according to an arranging position in a radial direction from a tire center, and a height information of respective regions of the figure, comprising the steps of:

cutting-out an image including the figure by selecting the figure from the tire CAD drawings; and

transforming respective regions of the cut-out image into a gray scale in accordance with a height information of respective regions obtained from the tire CAD drawings.

2. The method of creating master data used for inspecting a concave-convex figure according to claim 1, further comprising a step of:

deforming the cut-out image in accordance with the tire size and the arranging position in a radial direction from the tire center in such a manner that it becomes an original figure before deforming the figure included in the cut-out image into the sector form.

3. A method of creating master data used for inspecting a concave-convex figure formed on a surface of tire from tire CAD drawings, which have figures deformed according to a tire size and deformed into a sector form according to an arranging position in a radial direction from a tire center, and a height information of respective regions of the figure, comprising the steps of:

cutting-out an image including the figure by selecting the figure from the tire CAD drawings;

transforming respective regions of the cut-out image into a gray scale in accordance with a height information of respective regions obtained from the tire CAD drawings; and

deforming the image transformed into a gray scale in accordance with the tire size and the arranging position in a radial direction from the tire center in such a manner that it becomes an original figure before deforming the figure included in the image transformed into a gray scale into the sector form.

4. A method of creating master data used for inspecting a concave-convex figure formed on a surface of tire from tire CAD drawings, which have figures deformed according to a tire size and deformed into a sector form according to an arranging position in a radial direction from a tire center, and a height information of respective regions of the figure, comprising the steps of:

cutting-out an image including the figure by selecting the figure from the tire CAD drawings;

deforming the cut-out image in accordance with the tire size and the arranging position in a radial direction from the tire center in such a manner that it becomes an original figure before deforming the figure included in the cut-out image into the sector form; and

transforming respective regions of the transformed image into a gray scale in accordance with a height information of respective regions obtained from the tire CAD drawings.