| 摘要 |
<p>A method of investigating a characteristic of a bubble is disclosed in a fluid in which the bubble is introduced or produced. The method includes the steps of obtaining an acoustic signal from the fluid, representing an acoustic signature of the bubble, and identifying a time reference representing a beginning of the acoustic signature. The method further includes analysing a time parameter of at least one signal period associated with the acoustic signature subsequent to the time reference, and obtaining the characteristic of the bubble from the time parameter. Preferably, the time parameter is associated with the first signal period or part thereof subsequent to the time reference.</p> |
