JPS5616849A - Automatic appearance check unit for cylindrical material - Google Patents
Automatic appearance check unit for cylindrical materialInfo
- Publication number
- JPS5616849A JPS5616849A JP9157579A JP9157579A JPS5616849A JP S5616849 A JPS5616849 A JP S5616849A JP 9157579 A JP9157579 A JP 9157579A JP 9157579 A JP9157579 A JP 9157579A JP S5616849 A JPS5616849 A JP S5616849A
- Authority
- JP
- Japan
- Prior art keywords
- cylindrical materials
- image pick
- check unit
- circumference surface
- line
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
Abstract
PURPOSE:To eliminate variance of the scanning speed in the two-dimensional direction to perform high-precision check, by processing video signals, which are obtained from an image pick-up device by scanning in two dimensions, to check successively the outside circumference surface of cylindrical materials arranged into one line. CONSTITUTION:Many cylindrical materials 3 are arranged into one line and are arranged in parallel with two rollers 4a and 4b and are rotated in a fixed speed. Image pick-up device 5 is moved continuously in the arrangement direction of these cylindrical materials 3, and the moving speed is detected to shift picture element coordinates of the video signal obtained from image pick-up device 5 following this movement, and further, coordinates are updated for every one or two cylindrical materials 3. As a result, the outside circumference surface of many arranged cylindrical materials 3 can be checked efficiently with a minimum memory and a high precision.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9157579A JPS5616849A (en) | 1979-07-20 | 1979-07-20 | Automatic appearance check unit for cylindrical material |
FR8015979A FR2461944A1 (en) | 1979-07-20 | 1980-07-18 | METHOD AND APPARATUS FOR EXAMINING THE OUTER ASPECT OF A FULL CYLINDRICAL OBJECT |
US06/170,181 US4410278A (en) | 1979-07-20 | 1980-07-18 | Method and apparatus for appearance inspection |
DE19803027373 DE3027373A1 (en) | 1979-07-20 | 1980-07-18 | METHOD AND DEVICE FOR SURFACE TESTING |
GB8023661A GB2057675B (en) | 1979-07-20 | 1980-07-18 | Photoelectric detection of surface defects |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9157579A JPS5616849A (en) | 1979-07-20 | 1979-07-20 | Automatic appearance check unit for cylindrical material |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5616849A true JPS5616849A (en) | 1981-02-18 |
Family
ID=14030326
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9157579A Pending JPS5616849A (en) | 1979-07-20 | 1979-07-20 | Automatic appearance check unit for cylindrical material |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5616849A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100791170B1 (en) | 2006-04-14 | 2008-01-02 | 엘에스전선 주식회사 | Apparatus and method for detecting scratches on metal surface using machine vision |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS53125057A (en) * | 1977-04-08 | 1978-11-01 | Hitachi Ltd | Inspection apparatus for appearance of cylindrical object |
-
1979
- 1979-07-20 JP JP9157579A patent/JPS5616849A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS53125057A (en) * | 1977-04-08 | 1978-11-01 | Hitachi Ltd | Inspection apparatus for appearance of cylindrical object |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100791170B1 (en) | 2006-04-14 | 2008-01-02 | 엘에스전선 주식회사 | Apparatus and method for detecting scratches on metal surface using machine vision |
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