公开(公告)号：US11650302B2

公开(公告)日：2023-05-16

申请号：US16966737

申请日：2019-01-14

Applicant: Endress+Hauser SE+Co. KG

Inventor： Manuel Sautermeister ,  Lukas Schwörer ,  Winfried Mayer

IPC: G01S13/34 ,  G01F23/284 ,  G01S7/40 ,  G01F25/20

CPC classification number: G01S13/343 ,  G01F23/284 ,  G01F25/20 ,  G01S7/4004 ,  G01S7/4056 ,  G01S7/4091

Abstract: Disclosed is a method for detecting a faulty state of an FMCW-based fill level measuring device. For this, a correlation coefficient is ascertained by correlation, especially cross correlation, of the measurement signal with a reference signal. The faulty state is accordingly detected when the correlation coefficient subceeds a predefined minimum value. In this way, the functioning of the fill level measuring device can be monitored with a degree of safety allowing the fill level measuring device to be applied also in process plants and measuring environments, which require extremely reliable measuring apparatuses, and measurement data.