Assembly and method for determining speed of a...

Details Assembly and method for determining speed of a... Assembly and method for determining speed of a...

2006-10-17

2006-10-17

Pihulic, Dan (Department: 3662)

Communications, electrical: acoustic wave systems and devices

Echo systems

Speed determination

Reexamination Certificate

active

07123544

ABSTRACT:
An assembly for determining speed of a supercavitating underwater vehicle during underwater travel includes a fin mounted on the vehicle aft of a cavitator portion of the vehicle and adapted to be extended outwardly beyond a hull of the vehicle and through a boundary of a gas-filled cavity around the vehicle to form a disturbance in the cavity boundary, which disturbance propagates along the boundary. An acoustic transmitter is mounted on the vehicle and directs acoustic energy toward the boundary and the disturbance. An acoustic receiver is mounted on the vehicle and receives acoustic energy reflected off the disturbance. An autopilot is mounted on the vehicle and clocks times of projection of the fin and acoustic transmission receptions of reflected acoustic energy to determine the speed of the vehicle through the water.

REFERENCES:
patent: 4506353 (1985-03-01), Rott et al.
patent: 5224075 (1993-06-01), Iino et al.
patent: 5371718 (1994-12-01), Ikeda et al.
patent: 5475620 (1995-12-01), Kuzuya et al.
patent: 5827958 (1998-10-01), Sigler
patent: 6314053 (2001-11-01), Doisy et al.
Kuklinski et al.; Experimental Study of Ventilated Cavities on Dynamic Test Model; 2001; pp. 1-8.

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