Mesure de débit sur le terrain par ultrasons

SAUR

Abstract

Flow measurement on site with ultrasonic devices Instantaneous flowrates measurements in water distribution networks are required for improving network operation and water quality ontrol in the mains.The ultrasonic flowmeter with external probes is widely used and the best suited device for this function. Its accuracy is very high when operated in the design hydraulic conditions and provided that the pipe be clean and its geometry well known. In actual measurement conditions, however, many errors of various origins may occur and lead to unlikely, urlreliable and unconsistent results. Nevertheless, data post- processing methods tailored to the specific purpose of a measurements campaign have been developed to identify, evaluate and correct these errors so as to provide useful results.