公开(公告)号：US09714910B2

公开(公告)日：2017-07-25

申请号：US14434117

申请日：2013-10-10

Applicant: ABB Inc.

Inventor： Réal Ouellet ,  Jacques Marcotte ,  Patrick Couture ,  Sylvio Laplante ,  Bruno Simard

IPC: G01R27/08 ,  G01N27/00 ,  G06Q10/06 ,  G01R23/02 ,  G01N15/12 ,  G01N33/20 ,  G01N15/02

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.