Title:
SURFACE FLAW INSPECTING METHOD AND DEVICE THEREOF
Document Type and Number:
Japanese Patent JP3218908
Kind Code:
B2
Abstract:
PURPOSE: To provide a surface flaw inspecting method and its device capable of identifying whether the type of a flaw generated on a steel plate is harmless or not.
CONSTITUTION: A laser beam from a laser generator 10 is radiated to the surface of a steel plate S via a rotary reflector 12, the reflected light is received by a photoelectric converter 18 via a condensing lens 14 and a space filter 16, and the image signal is inputted to a control circuit 1. The image-processed image signal is inputted to a feature extracting means 5, it is image-processed and inputted to a flaw distribution generating means 6 for statistical processing, and the present flaw distribution data and the flaw distribution data read from an actual result flaw processing means 7 are compared by an identifying means 8 to specify a linear flaw in this surface flaw inspecting device.
Inventors:
Tsuneo Suyama
Mitsutake Satoh
Akira Takagi
Teruo Horisawa
Mitsutake Satoh
Akira Takagi
Teruo Horisawa
Application Number:
JP6401595A
Publication Date:
October 15, 2001
Filing Date:
March 23, 1995
Export Citation:
Assignee:
Nippon Steel Tube Co., Ltd.
International Classes:
G01B11/30; G01N21/88; G01N21/89; G01N21/892; G01N21/93; (IPC1-7): G01N21/892; G01B11/30
Domestic Patent References:
| JP290046A | ||||
| JP5999238A | ||||
| JP749314A |
Attorney, Agent or Firm:
Hideo Takino (1 outside)