COMPARATIVE STUDY ON ULTRASONIC AND VELOCITY INSTRUMENT IN THE FLOW MEASUREMENT OF OPEN CHANNEL

This paper introduced the flow measuring principle of time-difference method of ultrasonic flow meter and the flow calculating method in flow measurement with velocity instrument.Through the practical flow measuring Comparison between ultrasonic and velocity instrument,that the ultrasonic flow meter possesses higher precision,and Stronger applicability than the velocity instrument can be concluded.Moreover,ultrasonic flow meter does not affect the flow state in open channel and realizes the real-time monitoring and the real-time delivering of hydrological data.So,it can be promoted properly in the flow measurement of open channel as an accurate method.