METHOD AND DEVICE FOR MEASURING ULTRASONIC FLOW VELOCITY

摘要

PROBLEM TO BE SOLVED: To provide a method and a device for measuring ultrasonic flow velocity capable of accurately correcting the measured value of a difference in propagating time between ultrasonic waves. SOLUTION: Ultrasonic vibrators 2 and 3 are disposed on the upstream side and downstream side of measured fluid flowing through an ultrasonic flow velocity measurement pipe 1, ultrasonic waves are mutually generated and transmitted from the ultrasonic vibrators 2 and 3, the transmitted ultrasonic waves are mutually received, and a flow velocity is measured based on the difference in propagating time between the ultrasonic waves. In this case, the measured valueΔτof the difference in propagating time between the ultrasonic waves is corrected by using an expressionΔt=Δτ-(Kata-KbTb)...[1]. COPYRIGHT: (C)2004,JPO