Vibronic sensor

US12281929B2 · kind B2 · utility

Assignee

• Endress+Hauser SE+Co. KG · DE

Inventors

• Tobias Brengartner · Emmendingen, DE
• Jan Schleiferböck · Sluis 3, DE
• Benjamin Monse · Endingen am Kaiserstuhl, DE

Key dates

• Filing date: Jun 16, 2021
• Grant date: Apr 22, 2025
• Expiry date: Apr 8, 2042

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N9/002
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A vibronic sensor used to determine a process variable of a medium in a container comprises a mechanically vibratable unit, a drive/receiving unit, and an electronic unit. The drive/receiving unit excites mechanical vibrations in the mechanically vibratable unit via an electric excitation signal and receives the mechanical vibrations of the mechanically vibratable unit and convert same into an electric reception signal. The electronic unit is designed to generate the excitation signal on the basis of the reception signal and determine the process variable from the reception signal. The electronic unit includes an adaptive filter and is designed to set the filter characteristic of the adapter filter to produce a target phase offset between the excitation and reception signals. The sensor also has a detection unit to determine a phase offset between the excitation signal and the reception signal and/or the amplitude of the reception signal using a quadrature demodulation.