Method for ultrasonic Doppler fluid flow measurement

摘要

In a Doppler type ultrasonic flow meter (1) for measuring the volumetric flow of a measurement object fluid (10) using Doppler shift of ultrasound, (1) pair of ultrasonic transducers (3a, 3b) perform transmission of ultrasound and reception of an ultrasound echo resulting from the ultrasound being reflected. The (1) pair of ultrasonic transducers (3a, 3b) are disposed on an extension line of a measurement line ML for performing measurement of Doppler shift, symmetrical about the center axis (5) of a pipe (2) with a measurement object fluid (10) flowing through its inside, and on the outside of the pipe (2). A flow velocity distribution for the side opposite, with respect to the center axis (5) of the pipe (2), the side on which the respective ultrasonic transducer (3a, 3b) is disposed is used for the calculation of the volumetric flow of the measurement object fluid (10).