Method and device for measuring the thickness of an insulating coating
US6120833A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 17, 1999 |
| Grant date | Sep 19, 2000 |
| Priority date | — |
| Expiry date | Mar 17, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B7/085
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
During the application of a roll coating on a metal substrate, using double contactless measuring sensors (1, 3), inductive, and for instance optical or capacitive, the method consists in effecting, before application, at least a double distance measurement over a strip zone not yet coated, then, effecting, after application, at least another double distance measurement over approximately the same zone already coated, and the thickness of the applied coating is deduced from the double measurements before application and after application. The invention is applicable to the measurement of thickness, on ferromagnetic substrates, of non solidified coatings, in particular liquid or pasty and to the adjustment of thickness in installations with corresponding coatings.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.