Design of High-Accuracy Ultrasonic Flowmeter

In order to solve the problems of short propagation path and difficulties in measuring the transit-time when a traditional Z ultrasonic flowmeter is used for small caliber measurement,a new ultrasonic flowmeter is designed.Propagation path is extended and the attenuation of ultrasonic intensity is reduced by altering the transducer's installation.The high-precision flowmeter control system is designed by using FPGA as the main-controller and high accuracy timer as the time interval measurement controller.The experiments of constant speed test,alternate flow rate test and gross flow rate test to ultrasonic flowmeter are implemented.The measure accuracy of ultrasonic flowmeter is about 0.5%.