METHOD AND APPARATUS FOR MEASUREMENT OF POSTURE OF UNDERWATER INSTALLED OBJECT

Japanese Patent JP2524455

B2

PURPOSE: To obtain a method and an apparatus wherein the posture of a structure such as a sinker as an anchor installed in the water or an anchor made of iron is measured.
CONSTITUTION: A direction meter 10 which detects the direction of an arbitray reference line D1 and which outputs a directional signal is fixed onto an underwater installed object 3. Before its installation operation, the installed object 3 is suspended in a prescribed direction while a directional relative angle θbetween the installed object 3 and a working ship 1 has been fixed, and the correspondence of the directional signal from the direction meter 10 when a measurable prescribed angle is changed to the directional value of a gyrocompass 20 mounted on the working ship is gathered as own-difference calibration data. When the posture of the underwater installed object 3 is measured, an own-difference included in the directional angle of the direction meter 10 is calibrated by the own-difference calibration data. In addition, an inclinometer 11 which detects an inclination and which outputs an inclination signal is fixed onto the installed object 3, and the posture of the underwater installed object 3 can be measured on the basis of the direction and the inclination.

KIKUCHI TETSUKI
MIURA MASAYUKI
SATO TOMONORI
MIURA SATORU
TAKASE SHUNJIRO
KONDO HISAO

JP19944892A

August 14, 1996

July 27, 1992

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KAJIMA CONSTRUCTION CORP

G01C9/00; G01C15/00; G01C17/00; G01C17/38; (IPC1-7): G01C17/38; G01C15/00

JP50156960A
JP5626213A
JP61193016A
JP63150622A
JP363516A
JP3154816A
JP5582908A
JP45095B2

Reijiro Ichihigashi

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