EP 1685396 A1 20060802 - METHOD AND SYSTEM FOR THE DETECTION OF SURFACE DEFECTS ON A CONTINUOUSLY-CAST CRUDE METALLIC PRODUCT
Title (en)
METHOD AND SYSTEM FOR THE DETECTION OF SURFACE DEFECTS ON A CONTINUOUSLY-CAST CRUDE METALLIC PRODUCT
Title (de)
VERFAHREN UND SYSTEM ZUM NACHWEIS VON OBERFLÄCHENDEFEKTEN AUF EINEM STRANGGUSS-ROHMETALLPRODUKT
Title (fr)
PROCEDE ET SYSTEME DE DETECTION DE DEFAUTS DE SURFACE D'UN PRODUIT METALLIQUE BRUT DE COULEE CONTINUE
Publication
Application
Priority
- FR 2004002802 W 20041029
- FR 0313498 A 20031118
Abstract (en)
[origin: FR2862384A3] Detection of surface defects on a continuously cast metal semi-product uses a surface defect sensor for eddy currents with separated emitters and receivers. The sensor incorporates at least one line of at least three contiguous and controllable measuring cells. Each measuring cell is able to generate eddy currents at the surface of the metal product and, alternately, detect the eddy currents on the same surface. The method includes a stage of control of first and second cells of the same line, the first cell being controlled to generate the eddy currents at the surface of the metal product and the second cell being controlled to detect the eddy currents generated by the first and of which the circulation at the surface has been modified by the presence of surface defects. The first and second cells are separated from each other by at least one inactive measuring cell. An independent claim is also included for a system for the detection of surface defects in a continuously cast metal semi-product by this method.
IPC 8 full level
G01N 27/90 (2006.01)
CPC (source: EP KR US)
G01N 27/90 (2013.01 - KR); G01N 27/9006 (2013.01 - EP US); G01N 27/904 (2013.01 - EP US)
Citation (search report)
See references of WO 2005052569A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
FR 2862384 A3 20050520; FR 2862384 B3 20051104; BR PI0416310 A 20070109; CN 100447565 C 20081231; CN 1894579 A 20070110; EP 1685396 A1 20060802; JP 2007513330 A 20070524; JP 4652336 B2 20110316; KR 101065472 B1 20110916; KR 20060123349 A 20061201; RU 2006121448 A 20071227; RU 2343473 C2 20090110; UA 80504 C2 20070925; US 2007285088 A1 20071213; US 7489129 B2 20090210; WO 2005052569 A1 20050609
DOCDB simple family (application)
FR 0313498 A 20031118; BR PI0416310 A 20041029; CN 200480037715 A 20041029; EP 04805355 A 20041029; FR 2004002802 W 20041029; JP 2006540505 A 20041029; KR 20067012062 A 20041029; RU 2006121448 A 20041029; UA A200606743 A 20041029; US 57953304 A 20041029