Communications – electrical: acoustic wave systems and devices – Distance or direction finding – With electromagnetic wave
Patent
1994-03-25
1995-01-03
Pihulic, Daniel T.
Communications, electrical: acoustic wave systems and devices
Distance or direction finding
With electromagnetic wave
367 89, G01S 380, G01S 378
Patent
active
053792700
ABSTRACT:
An apparatus and method for determining the velocity of sound propagation a fluid as a function of position in the fluid along an axis. A wave of acoustic energy is transmitted along the axis to produce a disturbance that moves in the medium at the velocity of sound. A laser generator transmits a light pulse substantially along the axis through the fluid medium. As the light passes through the disturbance, light backscatters in a characteristic pattern that a detector senses for analysis to provide information concerning the distance traveled and the time of travel for the acoustic wave through the fluid medium and to provide a profile of output characteristic, such as the speed of sound in the medium, as a function of position in the medium.
REFERENCES:
patent: 4429994 (1984-02-01), Guagliardo et al.
Lall Prithvi C.
McGowan Michael J.
Oglo Michael F.
Pihulic Daniel T.
The United States of America as represented by the Secretary of
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