Patent · US Active

Method and arrangement for detecting surface and structural defects of a long moving product

US7970202B2 · kind B2 · utility

0Cited by
5References
7Claims
0Family size

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Inventors

Key dates

Filing dateJun 12, 2006
Grant dateJun 28, 2011
Priority date—
Expiry dateJun 22, 2028

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG01N25/72
  • WIPO fieldMeasurement
  • WIPO sectorInstruments

Abstract

A method for detecting defects of a material moving in a rolling mill generally comprises illuminating product, obtaining (ACQ) image thereof in at least one spectral band, in pre-processing the formed image, in detecting and extracting (DTEXTR) eventually suspected areas of the pre-processed image, and in classifying (CLASS) the suspected areas into one or several defect or defect-free categories. For hot-rolled materials, the product is inspected in three disjointed spectral bands, including infrared, red and, for instance, green band in such a way that the suspected areas are classified into one or several defect-free or defect categories including the surface and structural defects.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.