Non-contact shape meter for flatness measurements
US5781302A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 22, 1996 |
| Grant date | Jul 14, 1998 |
| Priority date | — |
| Expiry date | Jul 22, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B11/306
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A shape meter for measuring the deviation from flatness of a moving rolled steel plate is disclosed. The shape meter includes a laser source for generating an illuminated spot on the steel plate. The laser spot must be separable or distinguishable from background radiation emitted by the steel plate. For instance, if the steel plate is hot and the laser source is an argon laser generating blue green light, the optical filter must pass the blue green light and filter the red thermal emissions. The laser light is directed onto the moving steel plate, and a detector measures the light scattered from the steel plate. The detector includes an optical filter, an optical lens, and a lateral effect diode sensor. A computer then calculates and reports the deviation from flatness of the moving rolled steel plate based on the scattered light measured with the lateral effect diode sensor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.