ULTRASONIC FLOW VELOCITY MEASURING APPARATUS

摘要

PROBLEM TO BE SOLVED: To provide an ultrasonic flow velocity measuring apparatus which can efficiently increase the gain of a received wave and realize a smooth flow of a fluid and hence ensure a satisfactory measuring accuracy. SOLUTION: A flow velocity measuring unit 11 has inner surfaces formed symmetrically about the center point O between ultrasonic transducers 2, 3 over the entire circumference, and these symmetric inner surfaces form a part of an elliptical surface with a focus at the most close point of the peripheral edges of the transducers 2, 3. This increases the apertures of a fluid inlet and outlet 11a, 11b enough to take the almost of an ultrasonic wave transmitted from the ultrasonic transducer into the measuring unit (11) and realize a smooth flow of a fluid.