Cavity wall measurement apparatus and method

Measuring and testing – Fluid flow direction – Relative to aircraft or watercraft

Reexamination Certificate

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Reexamination Certificate

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06957579

ABSTRACT:
A method of measuring the vapor-liquid boundary surrounding a supercavitational high speed underwater vehicle includes the steps of arranging a sensor on a surface of the vehicle. The sensor has a transmit source for emitting an optical signal and a plurality of optical detectors for receiving a reflected optical signal. The reflected optical signal is detected with one of the optical detectors, and a duration of time between the emitting of the optical signal and the receiving of the reflected optical signal is measured. The method determines a separation distance from the transmit source to the receiving optical detector. The duration of time and the separation distance are combined to compute a boundary distance.

REFERENCES:
patent: 5504569 (1996-04-01), Kato et al.
patent: 5581232 (1996-12-01), Tanaka et al.
patent: 5600561 (1997-02-01), Okamura
patent: 5604580 (1997-02-01), Uehara
patent: 5808728 (1998-09-01), Uehara
patent: 6072421 (2000-06-01), Fukae et al.
patent: 2003/0127588 (2003-07-01), Martinez

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