MAGNETIC EXPLORATION EQUIPMENT AND MAGNETIC SENSOR DEVICE THEREOF

Japanese Patent JP3274308

B2

PURPOSE: To obtain a magnetic exploration equipment and A, magnetic sensors which explore metals, a submarine cable laid on the seabed and submarine resources in particular, by detecting very small magnetism.
CONSTITUTION: Two triaxial orthogonal type DC magnetic sensors 31A and 31B constructed by combining three magnetic sensors 31AX, 31AY, and 31AZ and 31BX, 31BY and 31BZ in three-axes directions respectively are mounted on an underwater robot, and output signals V1 (x, y, z) and V2 (x, y, z) of these sensors are processed by an arithmetic processing part (CPU 34) through the intermediary of signal converters 32 and an interface circuit 33 and transmitted to an exploration equipment on a ship through a dither cable 11. In order to detect very small magnetism, the variation of a magnetic field at the time when the underwater robot is rotated one time under water is measured and the relationship between the azimuth of the underwater robot and the amount of the variation of the magnetic field is stored in a memory on the ship beforehand. Detection of the magnetic field is executed by subtracting the amount of the variation of the detected magnetic field depending on the azimuth of the underwater robot.

Kenichi Asakawa
Satoru Takagi

JP6013095A

April 15, 2002

February 24, 1995

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KDDI Co., Ltd.

G01V3/08; B63C11/48; G01R33/02; G01R33/04; G01V3/165; (IPC1-7): G01V3/08; G01R33/02; G01R33/04; G01V3/165

JP6102358A
JP62148877A
JP5535204A
JP5559352A
JP3276002A
JP4259872A

Atsuo Waki (1 person outside)

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