Optoelectronic method and appliance for measuring the inside diameter of a hollow body
US9243893B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 8, 2012 |
| Grant date | Jan 26, 2016 |
| Priority date | — |
| Expiry date | Aug 8, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T7/62
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention relates to a method of measuring the inside diameter of a hollow body. According to the invention: the hollow body is illuminated from one side by a diffuse light source presenting two light boundaries that are spaced apart along the measurement axis so as to create two light transitions in an image, which transitions are spaced apart from each other and diametrically opposite; from the side of the hollow body that is opposite from its illuminated side, the light rays that are reflected and refracted by the hollow body are recovered to form at least one image in which there appear at least the two light transitions; and the image is processed in order to determine the distance between the two light transitions in order to determine a measurement for the inside diameter of the hollow body.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.