ULTRASONIC FLOWMETER

PROBLEM TO BE SOLVED: To precisely measure flow velocity and flow rate by making a fluid which has flowed in one direction through a straight channel flow with a slope at an inclination part by providing piping with the straight channel between acoustic lenses equipped with ultrasonic oscillators. SOLUTION: The ultrasonic flowmeter comprises: a piping 7 composed of a straight channel 7a for making fluid flow and inclination parts 7b and 7c; acoustic propagation mediums 8 and 9 to be provided on a linear extending line of a straight channel 7a; a pair of the acoustic lenses 10 and 11 provided with acoustic propagation mediums 8 and 9; ultrasound oscillators 12 and 13 which are provided behind the acoustic lenses 10 and 11; mounting member 14 and 15 for fixing the acoustic lenses 10 and 11; ultrasonic oscillators 12 and 13 together with the inclination part 7b of the piping 7 on the mounting members 14 and 15; the holding member 16 for fixing the mounting members 14 and 15 for holding the straight channel of the piping 7 by the holding member 16; and the flow rate measurement circuit 17 connected with the ultrasonic oscillators 12 and 13. COPYRIGHT: (C)2007,JPO&INPIT