Measuring system for ascertaining a volume flow and/or a volume flow rate of a medium flowing in a pipeline

US9372107B2 · kind B2 · utility

Assignee

• Endress+Hauser Flowtec AG · CH

Inventors

• Michael Kirst · Lörrach, DE
• Alfred Rieder · Landshut, DE

Key dates

• Filing date: Sep 23, 2013
• Grant date: Jun 21, 2016
• Expiry date: Sep 23, 2033

Classification

• Technology area (CPC G): Physics
• CPC primary: G01F25/10
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

The measuring system comprises: a vibration element for guiding flowing medium and having a lumen; and a vibration element, which is adapted to be contacted, at least at times, by a part of the medium. Additionally, the measuring system includes at least two oscillation exciters for exciting resonant oscillations of the respective vibration elements, two mutually spaced oscillation sensors for registering vibrations of the vibration element, each of which generates an oscillatory signal dependent on vibrations of the vibration element, as well as at least one oscillation sensor for registering vibrations of the vibration element and generating, dependent on vibrations of the vibration element, an oscillatory signal, which has a signal frequency corresponding to a resonant frequency, of the vibration element. Moreover, the measuring system also comprises a measuring and operating electronics, which based on a phase difference, existing between the oscillation signals and based on the signal frequency of the oscillation signal generates a measured value representing the volume flow rate, respectively the volume flow.