Method for detecting a fault state at an FMCW-based filling level measuring device

US11366002B2 · kind B2 · utility

Assignee

• Endress+Hauser SE+Co. KG · DE

Inventors

• Manuel Sautermeister · Schopfheim, DE
• Winfried Mayer · Hobrechtsfelde, DE

Key dates

• Filing date: Dec 8, 2017
• Grant date: Jun 21, 2022
• Expiry date: Jan 26, 2039

Classification

• Technology area (CPC G): Physics
• CPC primary: G01S13/88
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

The present disclosure relates to a method for detecting a fault state at an FMCW-based fill level measuring device, including performing two reference measurements successively in time, a first reference measurement signal and a second reference measurement signal, using the filling level measuring device under a predefined reference measurement condition. In each of the two reference measurement signals a characteristic parameter is determined, wherein a change in the characteristic parameter over time is determined by comparing the two reference measurement signals. A fault state is detected when the change in the characteristic parameter exceeds a predefined maximum characteristic parameter change.