Honeywell International Inc.
Ultrasonic flow meter with lens combination

Abstract:

An ultrasonic flow meter includes a housing for attaching to a fluid pipe. A first piezoelectric element coupled to a transmitter and receiver is configured to emit ultrasonic waves in an axial direction perpendicular to a horizontal plane defined by the piezoelectric element. A lens combination is in a lower housing portion positioned radially outside the first piezoelectric element including a refocusing lens that is ring-shaped configured for redirecting received radial ultrasonic waves to travel in an axial direction perpendicular to the horizontal plane and has a thickness profile configured to act as a matching layer for reducing multiple reflections within the lower housing portion. A second lens that is disc-shaped below the refocusing lens is configured for redirecting the radial ultrasonic waves to travel in the axial direction.