ULTRASONIC FLOW VELOCITY-MEASURING APPARATUS

摘要

PROBLEM TO BE SOLVED: To provide an ultrasonic flow velocity-measuring apparatus which cannot only increase a gain of a receiving wave to a maximum, but secure a sufficient measurement accuracy. SOLUTION: A flow velocity-measuring part 7 is set to a lower horizontal part of an ultrasonic flow velocity measurement pipe 1 in the ultrasonic flow velocity-measuring apparatus. Inner faces of reflecting parts 7a of the flow velocity-measuring part 7 are formed to parabolic inner faces having an agreeing focal position and arranged symmetrically on the same axis. The inner face of a central part of the flow velocity-measuring part 7 is formed as a connecting part 7b of the parabolic inner faces to a cylindrical face of a small inner diameter.