Vibronic measuring system for measuring a mass flow rate of a fluid measurement medium

US12281924B2 · kind B2 · utility

Assignee

• Endress+Hauser Flowtec AG · CH

Inventors

• Alfred Rieder · Landshut, DE
• Robert Lalla · Bad Kötzting, DE
• Marcel Braun · Konolfingen, CH
• Ennio Bitto · Aesch, CH
• Johan Pohl · Freiburg (Elbe), DE

Key dates

• Filing date: Nov 20, 2020
• Grant date: Apr 22, 2025
• Expiry date: Jan 5, 2042

Classification

• Technology area (CPC G): Physics
• CPC primary: G01F15/007
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

The measuring system comprises a vibration-type measuring sensor, a sensor housing, a magnetic-field detector, and measuring-system electronics electrically coupled both to an oscillation exciter and to oscillation-sensing devices of the measuring sensor. The measuring sensor is inside the sensor housing and the magnetic-field detector is outside the sensor housing. The magnetic-field detector is designed to convert changes in the magnetic field into a magnetic-field signal having an amplitude dependent on a magnetic flux through the magnetic-field detector and/or on an area density of said magnetic flux. The measuring-system electronics are designed to determine, on the basis of oscillation measurement signals of the measuring sensor, the mass-flow-rate measurement values representing the mass flow rate and to at least qualitatively determine, on the basis of the magnetic-field signal, whether an external magnetic field is established inside the measuring sensor.