Ultrasonic flow sensor for detecting a flow of a fluid medium

US8794080B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Roland Mueller · Caledon East, CA
• Gerhard Hueftle · Aspach, DE
• Michael Horstbrink · Kornwestheim, DE
• Tobias Lang · Stuttgart, DE
• Sami Radwan · Stuttgart, DE
• Bernd Kuenzl · Schwieberdingen, DE
• Roland Wanja · Markgröningen, DE

Key dates

• Filing date: Aug 18, 2010
• Grant date: Aug 5, 2014
• Expiry date: Jun 8, 2031

Classification

• Technology area (CPC G): Physics
• CPC primary: G01F1/667
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

An ultrasonic flow sensor for detecting a flow of a fluid medium in a flow tube includes at least one first ultrasonic transducer, at least one second ultrasonic transducer, and at least one waveguide configured to conduct ultrasonic waves between the at least one first ultrasonic transducer and the at least one second ultrasonic transducer by reflection on walls of the waveguide, and to enable the fluid medium to flow through. The ultrasonic waves are able to propagate between the first ultrasonic transducer and the second ultrasonic transducer on at least two ultrasonic paths. Sound energies of the ultrasonic waves transmitted on the at least two different ultrasonic paths differ from one another by no more than a factor of 100.