Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : June 16, 2016 - June 17, 2016
This paper presents an application of a novel ultrasonic pulse, half-inversion pulse, to the velocity profile measurement using Ultrasonic Time-Domain Correlation (UTDC) method. UTDC is a type of flow metering method that is applicable to the on-site calibration. The advantages of this method are the possibility of no-limitation of velocity range and applicability to flow fields without enough reflectors. Previous studies reported, however, that UTDC has also a limitation of velocity range because of the false detection. To overcome the false detection, we have developed a new waveform of pulsed ultrasound. Experimental measurements were performed at the national standard calibration facility of water flowrate in Japan. The results indicate that UTDC employing half-inversion pulse can measure velocity profiles and flowrates with higher accuracy than the conventional method.
