Method for recognizing position of honeycomb structure

• US 7,133,574 B2
• Filed: 08/22/2002
• Issued: 11/07/2006
• Est. Priority Date: 09/10/2001
• Status: Expired due to Fees

• Current Assignee: DENSO Corporation
• Original Assignee: DENSO Corporation
• Inventors: Minami, Takao
• Primary Examiner(s): Ahmed, Samir
• Assistant Examiner(s): Seth, Manav
• Application Number:
  US10/225,292
• Publication Number:
  US 20030048941A1
• Time in Patent Office: 1,538 Days
• Field of Search: 382/291, 382/103, 382/106, 382/151, 382/141, 382/199, 356/602, 356/606, 348/50, 348/136
• US Class Current: 382/291
• CPC Class Codes: G01N 21/95692 Patterns showing hole parts, e.g. honeycomb filtering structures

Abstract

A position of a honeycomb structure, which is comprised of an outer shell, separation walls arranged in the form of a honeycomb within the outer shell, and a number of axially extending cells which are defined by the separation walls, is recognized. When the position recognition is carried out, the honeycomb structure is located with the axis extending in an upward and downward direction. A camera to pickup image data is disposed out of an area directly above an upper surface of the honeycomb structure in the axial direction. Image data including the entirety of the upper surface of the honeycomb structure is picked up by the camera, so that the position of the honeycomb structure is recognized based on the image data.

Claims

1. A position recognition method for recognizing a correct position of a honeycomb structure which is comprised of an outer shell, separation walls arranged in the form of a honeycomb within the outer shell, and a number of axially extending cells which are defined by the separation walls, said honeycomb structure being located with the axis extending in an upward and downward direction, wherein

the honeycomb structure is placed on a pallet of a color having a brightness different from that of the honeycomb structure, and a camera to pickup image data is disposed above the honeycomb structure, so that image data of at least a part of the upper surface of the honeycomb structure is picked up by the camera, the camera being disposed at a position where the camera directly views the pallet, on which the honeycomb structure is arranged, through the cells of the honeycomb structure, whereby the position of the honeycomb structure is recognized based on the image data,

wherein the pallet is of a color having lesser brightness than the honeycomb structure.

2. A position recognition method according to claim 1, wherein the image data is color data.