Cylindrical body appearance inspection apparatus
US4226539A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 22, 1977 |
| Grant date | Oct 7, 1980 |
| Priority date | — |
| Expiry date | Dec 22, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06G7/48
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An automatic cylindrical body appearance inspection apparatus comprises a cylindrical body appearance detecting device including rotating means for rotating the cylindrical body around its axis at a constant speed and detecting means for optically picking up an image of a cylindrical surface of the cylindrical body rotated by the rotating means and one-dimensionally scanning the image on a plane of real image thereof in a predetermined direction to extract a base line of the cylindrical surface of the cylindrical body as an image signal, an end surface appearance detecting device including a pair of detecting means each for optically picking up an image of each of opposite end surfaces of the cylindrical body and one-dimensionally scanning the image on a plane of real image thereof in a direction transverse to the predetermined direction to extract an image signal, transporting means for transporting the cylindrical body while it is positioned, from the cylindrical surface appearance detecting means to the end surface appearance detecting means and determining means for determining pass or fail or grade of a defect pattern on the surfaces of the cylindrical body based on the image …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.