Method and apparatus for measuring the shape of the wavy edges of metal strips using a detection coil controlled to track the strip edge
US4019131A · kind A · utility
11Cited by
5References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 30, 1975 |
| Grant date | Apr 19, 1977 |
| Priority date | — |
| Expiry date | Oct 30, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B7/345
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The measuring apparatus comprises an electromagnetic induction type non-contacting distance measuring device including a detection coil disposed near the edge of a running metal strip, a filter for deriving out the high frequency component and the low frequency component of the output of the detection coil, means responsive to the high frequency component for determining the contour of the wavy edge of the strip and means responsive to the low frequency component for adjusting the lateral position of the detection coil with respect to the edge of the metal strip.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.