抄録
Hydraulic power is one of the most important base powers in Japan. Usually, the intake water flow is controlled by some methods such as surface flow rate measurement and water height measurement for cross-sectional flow rate. However, these methods are influenced by the changes of natural environment and the maintenance of the stable output becomes increasingly difficult. Therefore, high accuracy flow rate measurement, which evaluates a flow rate by cross-sectional integration of the velocity profiles, is an effective method to measure the flow rate. In this study, we focused on an ultrasonic array sensor which has been successfully applied to nondestructive inspection and medical diagnostics. An array sensor can measure the multi-line velocity profiles by using an ultrasonic Doppler method (UDM) for flow rate estimation. In addition, the bottom shape was evaluated from the velocity profile data when the bottom shape was changed.
