Magnetic-inductive flowmeter and method of operating the same

US12123754B2 · kind B2 · utility

Inventors

• Helmut Brockhaus · Dinslaken, DE
• Markus Dabrowski · Duisburg, DE
• Ulrike Schwenger · Essen, DE

Key dates

• Filing date: Sep 20, 2022
• Grant date: Oct 22, 2024
• Expiry date: Jun 24, 2043

Classification

• Technology area (CPC G): Physics
• CPC primary: G01F1/60
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A magnetic-inductive flowmeter includes a tube, electrodes in contact with a medium in the tube, a magnetic field generator, an impedance signal generator, and a control device. A first signal path interconnects the impedance signal generator and a first electrode, and a second signal path interconnects the impedance signal generator and a second electrode. A first switch and first and third capacitors are connected such that, in a first state, only the first capacitor and, in a second state, only the third capacitor is in the first signal path. A second switch and second and fourth capacitors are connected such that, in a first state, only the second capacitor and, in a second state, only the fourth capacitor is in the second signal path. The control device sets the switches to the first state during a positive magnetic phase and to the second state during a negative magnetic phase.