TY - JOUR
T1 - Design and Fabrication of a Four-path Ultrasonic Flowmeter using the Time-difference Method
TT - طراحی و پیاده سازی دبیسنج فراصوت چهارمسیره با استفاده از روش تفاضل زمانی
JF - joc-isice
JO - joc-isice
VL - 11
IS - 2
UR - http://joc.kntu.ac.ir/article-1-420-en.html
Y1 - 2017
SP - 55
EP - 62
KW - flow meter
KW - ultrasonic
KW - time difference method
KW - method of Gauss-Legendre
N2 - A four-path ultrasonic flow meter was designed and fabricated by using of ultrasonic transmitter/receivers on an 8-inch pipe. By passing fluid through the flowmeter at a controlled rate, the velocity was measured in different layers using the time-difference method. Fluid flow rate was estimated by Gauss-Legendre numerical integration method and applying of the engineering approximation. By comparison of the results with the actual measurement done by a calibrated reference flow meter, the accuracy of the system was tested at various flow rates. It also was compared with the measurement of an equivalent one-path ultrasonic flowmeter, and the measurement errors were calculated. The test result represented that, the average error of measurement is less than 3% at the speeds of 0.5 m/s and more. The average error was more than 15% at the speeds below 0.3 m/s. The measurement error of the one-path flowmeter was 20% more than that of four path one.
M3
ER -