| 摘要 |
The presence of interfaces situated between at least two phases having similar but unequal acoustic impedance values and two phases having quite different acoustic impedance values is detected, it being possible for at least one of the phases to contain solid particles. The device includes a chamber (1) connected to at least one conduit for introducing a polyphase fluid, a first means for generating an ultrasound wave in a direction not parallel to the said phase, the means is also designed to receive a signal generated by a reflection of the wave from the interface, and processing means (M) which make it possible to take various measurements and to process them in order to deduce therefrom the quantity of at least one of the phases present in the polyphase fluid. <IMAGE>
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