Ultrasonic time of flight flow measuring device and method

US10837816B2 · kind B2 · utility

Assignee

• Diehl Metering GmbH · DE

Inventors

• MICHAEL MAYLE · Ansbach, DE
• Peter Ploss · Grayslake, US
• ANDREAS BENKERT · Ansbach, DE

Key dates

• Filing date: Aug 12, 2019
• Grant date: Nov 17, 2020
• Expiry date: Aug 12, 2039

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N2011/0073
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method for operating a measuring device determining a fluid quantity relating to fluid or fluid flow uses a measuring tube receiving the fluid or conducting the flow and oscillation transducers spaced along the tube. A first flight time is recorded, then an ultrasound signal excited by a first transducer, after travel on a propagation path including only components of the measuring device to a second transducer, is recorded at a second transducer. A second flight time is recorded, then an ultrasound signal excited by the second transducer, after travel on the propagation path to the first transducer, is recorded at the first transducer. Then fulfillment of a report condition depending on a difference between flight times is checked. Upon fulfillment, a report is output to a user or a report message is sent to an external device or a correction parameter for determining the fluid quantity is adapted.