Underwater measuring systems and methods

Details Underwater measuring systems and methods Underwater measuring systems and methods

1990-05-14

1991-09-10

Shoap, Allan N.

Geometrical instruments

Straight-line light ray type

With magnetic compass

33278, 33280, 33284, 33DIG21, 356 1, G01C 314

Patent

active

050462598

ABSTRACT:
Measuring systems for making underwater measurements of relative positions and distances between a plurality of objects positioned on an ocean or lake floor basically include (a) at least one laser or other light source capable of projecting a collimated light beam therefrom, (b) a pan and tilt unit for moving the source light beam both angularly in vertical planes and in horizontal arcs, (c) a protractor or equivalent for measuring vertical angles through which the longitudinal axis of the light beam is moved by the pan and tilt unit, and (d) a compass unit for determining bearings of vertical plane positions of the light beam relative to magnetic or true north or other azimuth position. The system may include a plurality of lasers and a variety of methods of making measurements with both single and plural laser containing systems are disclosed.

REFERENCES:
patent: 3202040 (1965-08-01), Burkhart
patent: 3633010 (1972-01-01), Svetlichny
patent: 3775735 (1973-11-01), Funk et al.
patent: 4109391 (1978-08-01), Wing
patent: 4249314 (1981-02-01), Beck
patent: 4419731 (1983-12-01), Puffett
patent: 4459758 (1984-07-01), Halle
patent: 4538907 (1985-09-01), Rocchi
patent: 4691446 (1987-09-01), Pitches et al.
patent: 4703563 (1987-11-01), Hoshino et al.
patent: 4981353 (1991-01-01), Murakawa et al.
patent: 5008543 (1991-04-01), Bertrand et al.

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