Title:
サークルスクラッチ検査装置
Document Type and Number:
Japanese Patent JP6622679
Kind Code:
B2
Abstract:
A circular scratch inspection apparatus includes: a camera capturing an image of a workpiece surface around a hole; illumination device emitting light to the workpiece surface around the hole, the light being reflected on the workpiece surface is not directly incident on the camera; and image processor. The image processor: generates a second-derivative image by performing secondary differentiation on luminance values in an actual image obtained by the camera; generates a second-derivative curve for each of a plurality of ruler lines, extending radially from the hole center and are set in an inspection target region on the workpiece surface; counts a first reference number of times for each ruler line; calculates a first reference total number of times; and determines presence or absence of a circular scratch by using the first reference total number of times.
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Inventors:
Osamu Prince
Hiroki Hanawa
Kenji Kasahara
Shuhei Segawa
Shogo Kojima
Hiroki Hanawa
Kenji Kasahara
Shuhei Segawa
Shogo Kojima
Application Number:
JP2016209215A
Publication Date:
December 18, 2019
Filing Date:
October 26, 2016
Export Citation:
Assignee:
Kawasaki Heavy Industries, Ltd.
International Classes:
G01N21/88
Domestic Patent References:
| JP200055824A | ||||
| JP200166263A | ||||
| JP20073208A | ||||
| JP8145848A | ||||
| JP2010122192A | ||||
| JP201329350A | ||||
| JP112611A |
Foreign References:
| US20120268733 |
Attorney, Agent or Firm:
Patent business corporation Yuko patent office