A method and system for measuring the axial flow velocity distribution and flow velocity in a pipe by sonication.

摘要

PROBLEM TO BE SOLVED: To provide a method and a system for measuring an axial flow velocity distribution and a flow rate in a pipe by an sonic method. SOLUTION: The method of measuring the flow velocity distribution and the flow rate is a step of selecting a unique cross section in a stable section or a section of interest of a pipe or a container and installing a plurality of sound wave sensors on a wall around the cross section. A step in which a plurality of effective sound wave paths are formed between a plurality of sound wave sensors, and here, between each pair of sound wave sensors, only one effective sound wave path is counted. By measuring the sound wave propagation time in each effective sound wave path and substituting each sound wave propagation time into the model formula of the present invention based on the refraction principle of the sound wave path, the reconstruction calculation is performed. , The axial flow velocity distribution u (x, y) of the cross section of the pipe or container waiting for measurement can be obtained, and the obtained axial flow velocity distribution u (x, y) is integrated along the cross section. Then, the flow rate in the pipe is obtained. [Selection diagram] Fig. 2