Method and apparatus for measuring irregularities on an outer surface of a rotatable cylindrical shaft
US6816250B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 12, 2001 |
| Grant date | Nov 9, 2004 |
| Priority date | — |
| Expiry date | Nov 22, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/952
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for measuring irregularities on the outer surface of an article employs an apparatus to obtain qualitative information regarding a first portion of the outer surface of the article, which can be used to generate a visual representation of a first portion of the outer surface of the article. Then, the article is moved by a predetermined amount, and the apparatus is again used to generate a visual representation of a second portion of the surface of the article. This process is repeated to obtain a plurality of visual representations that together span across a predetermined amount of the surface of the article. Then, the plurality of visual representations are processed to generate a single comprehensive enlarged visual representation of a relatively large surface area of the article, which is preferably shaded, colored, or otherwise highlighted to illustrate the irregularities that are formed therein. The single comprehensive enlarged visual representation can be used to analyze the nature of such irregularities.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.