TOMOGRAPHE ULTRASONORE, SYSTEME ET PROCEDE DE MESURE TOMOGRAPHIQUE ULTRASONORE AU MOYEN D'UN TEL TOMOGRAPHE

摘要

The invention concerns an ultrasonic tomograph for spatial and temporal characterisation of moving fluids such as air and water. Said tomograph comprises a plurality of pairs of ultrasonic transceiver probes, each pair capable of being oppositely inscribed on a circle around a fluid line of flow. The probes are therefore arranged on either side of the flow and neither modify nor disturb it. Each probe is capable of moving on a plane perpendicular to the line of flow. Indeed each probe is associated with a step motor. Each probe is a piezoelectric ceramic transducer which does not suffer any drift in time and which does not require re-calibration, which provides the inventive tomograph with temporal stability. Moreover, said tomograph is robust since said ultrasonic probes can be used in extreme conditions. The frequency of the ultrasounds range between 30 kHz and 300 kHz.