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AssigneeRemTech Co.
InventorsJean-Michel Fage, Remy Tasso, Alain Donzier
Estimating the term…
A method of remotely determining the three-dimensional velocity of a fluid such as air or water, the method consisting in emitting signals of determined frequencies in at least three different directions by means of a plane array of transducers, and in using said transducers to pick up acoustic signals backscattered by the fluid, the method consisting in emitting trains of signals at different determined frequencies f1, f2, and f3, firstly in a determined direction D1, then in a determined direction D2, and finally in a determined direction D3, and subsequently in picking up all of the signals backscattered by the fluid. The invention makes it possible to improve the accuracy and to increase the maximum range of measurements.
A method of remotely determining the three-dimensional velocity of a fluid such as air or water, the method consisting in emitting a train of acoustic signals of determined frequency in at least three different directions by means of an array of transducers, the emitted signals having determined durations and determined different frequencies and being emitted in succession in one of the said directions, then in another of said directions, and so on until said train of signals has been emitted successively in all said directions, in using the same transducers to pick up the acoustic signals backscattered by the fluid, the signals picked-up during each of a succession of time intervals equal to the said duration of an emitted signal comprising signals having different frequencies which have been backscattered by the fluid in the said different directions and at different distances from the transducers, in processing the signals picked-up during said succession of time intervals to obtain frequency spectra following one another in time for each of the said directions, and in deducing therefrom the velocities of the fluid at different distances in each of the said directions on the basis of the shifts in frequency between the emitted signals and the picked-up signals.
A method for remotely determining the velocity of a fluid at a plurality of points in said fluid, comprising:
A system for remotely determining the velocity of a fluid at a plurality of points in said fluid, comprising:
Dependencies are inferred from the claim text.