Monitoring the planarity of metal sheet
US4541723A · kind A · utility
14Cited by
6References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 20, 1983 |
| Grant date | Sep 17, 1985 |
| Priority date | — |
| Expiry date | Dec 20, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B11/024
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Optical beams from lasers are directed towards the middle and edges of a hot rolled steel sheet by fixed mirrors and rotatable mirrors which allow for different sheet widths. The points of incidence of the beams are observed by photodiode cameras whose receiving axes are orientated by fixed mirrors and rotatable mirrors so that the points remain in the respective fields of observation of the cameras. The levels of the points are obtained by triangulation and are used in the calculation of the planarity of the sheet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.