APPARATUS FOR MEASURING FLOW OF FLUID

摘要

PROBLEM TO BE SOLVED: To highly accurately measure flow velocities etc. by uniformly propagating ultrasonic waves through a channel. SOLUTION: This apparatus for measuring the flow of a fluid has at least a pair of ultrasonic transmitters/receivers 2a and 2b arranged on the upstream and downstream sides of the fluid channel and measures the flow velocity and/or quantity of flow of the fluid on the basis of the propagation delay time of ultrasonic waves between the ultrasonic transmitters/receivers 2a and 2b. The ultrasonic transmitters/receivers 2a and 2b are each constituted of a piezoelectric body 12 and an acoustic matching member 13. A hollow ultrasonic adjusting means is arranged at the center of the acoustic matching member 13. It is therefore possible to make ultrasonic transmission uniform and accordingly achieve high accuracy in measurement. COPYRIGHT: (C)2005,JPO&NCIPI