公开(公告)号：EP2906927A4

公开(公告)日：2016-06-22

申请号：EP13846869

申请日：2013-10-10

Applicant: ABB INC

Inventor： QUELLET RÉAL ,  MARCOTTE JACQUES ,  COUTURE PATRICK ,  LAPLANTE SYLVIO ,  SIMARD BRUNO

IPC: G01N15/10 ,  G01N15/12 ,  G01N33/20

CPC classification number: G01N27/00 ,  G01N15/02 ,  G01N15/12 ,  G01N33/206 ,  G01R23/02 ,  G06Q10/06313 ,  G06Q10/0637

Abstract: An apparatus to detect and measure suspended particles in a molten metal where the suspended particles have an associated noise frequency range has in addition to the electrically non-conductive barrier for immersion in the molten-metal, a device to move the molten metal through an orifice in the barrier and electrodes, a time varying excitation source that generates an AC current at a predetermined range of excitation frequency that is out of the predominant noise frequency range to generate an AC signal that is representative of the measure of the suspended particles. A detector detects and quantifies from the measurement AC signal the suspended particles. The detector can be a synchronous detector.