公开(公告)号：US20170356834A1

公开(公告)日：2017-12-14

申请号：US15538430

申请日：2015-11-30

Applicant: Grundfos Holding A/S

Inventor： Kåre IVERSEN ,  Christian GULDBÆK SMITH ,  Mathis DAHLQVIST

IPC: G01N15/02 ,  G06K9/00 ,  G01N21/958 ,  G01N33/18 ,  G06K9/40 ,  G01N15/14 ,  G01N21/88 ,  G01N21/15 ,  G01N15/00

CPC classification number: G01N15/0227 ,  G01N15/1463 ,  G01N15/1475 ,  G01N21/15 ,  G01N21/85 ,  G01N21/8851 ,  G01N21/94 ,  G01N21/958 ,  G01N33/1893 ,  G01N2015/0088 ,  G01N2015/1493 ,  G01N2021/157 ,  G01N2021/8887 ,  G06K9/0014 ,  G06K9/40

Abstract: A method for the quantitative and/or qualitative detection of particles in fluid, with which the fluid to be examined is introduced into a beam path of an optical device, between at least one light source and the image acquisition sensor with a matrix of light-sensitive cells. Pixel values of the cells are detected and the distribution of the pixel values is at least partly determined. The pixel value or values which have been determined most often are used as a value or average value for a background signal. A signal is outputted or the method is interrupted, on reaching a maximal permissible value for the background signal.