Damage location system for a tanker ship

Details Damage location system for a tanker ship Damage location system for a tanker ship

1990-06-29

1991-05-21

Lobo, Ian J.

Communications, electrical: acoustic wave systems and devices

Distance or direction finding

With time interval measuring means

367191, 367129, 73786, G01S 3808

Patent

active

050181130

ABSTRACT:
Hydrophones are installed in each tank of a liquid cargo tanker ship. In the unfortunate event that the tanker collides with an obstacle in the water, the hydrophones detect the shock wave due to the collision. The relative first arrival times of the shock wave at the respective hydrophones are measured and the arrival-time differences between two hydrophones of any two different selected pairs of hydrophones is calculated. Hyperbolic lines of constant time difference are projected on a map of the locations of the hydrophones on the ship. The intersection of the lines of position representing the calculated first arrival time differences marks the location of the impact of the ship with the obstacle.

REFERENCES:
patent: 4241683 (1980-12-01), Conway
patent: 4249834 (1981-02-01), Bouvier
patent: 4285241 (1981-08-01), Smith et al.
patent: 4301006 (1981-11-01), Davis
patent: 4317186 (1982-02-01), Nishi et al.
patent: 4412501 (1983-11-01), Davis
patent: 4480480 (1984-11-01), Scott et al.
patent: 4586378 (1986-05-01), Izumi et al.
patent: 4897823 (1990-01-01), Krien

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