公开(公告)号：US10175077B2

公开(公告)日：2019-01-08

申请号：US15050314

申请日：2016-02-22

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Matthieu Chevrier ,  Michael Weitz

IPC: G01F1/66 ,  H02H9/00 ,  H02H9/02

Abstract: Elements of a single beam-forming array of ultrasonic transducer elements are selectively activated to direct two or more ultrasonic beams to a series of acoustic mirrors mounted to or fabricated at known locations at an inside surface of the pipe. The ultrasonic beams traverse measurement path segments at known angles through a fluid flowing through the pipe before being received back at the single transducer array. Fluid flow velocity along the fluid flow path is calculated as a function of a difference in time-of-flight (TOF) along first and second ultrasonic beam paths after subtracting TOF components contributed by known-length non-measurement path segments. The difference in TOF results from an additive downstream fluid flow velocity vector component along a first measurement path segment and a subtractive upstream fluid flow velocity vector component along a second measurement path segment.