Device for quantitatively measuring the relative position and or

Details Device for quantitatively measuring the relative position and or Device for quantitatively measuring the relative position and or

1986-10-09

1989-07-18

Eisenzopf, Reinhard J.

Electricity: measuring and testing

Magnetic

Displacement

342451, G01B 714, G01S 504

Patent

active

048496928

ABSTRACT:
A device for quantitatively measuring the relative position and orientation of two bodies in the presence of metals via measuring the position and orientation of receiving antennae with respect to transmitting antennae utilizing direct current electromagnetic field signals is hereby disclosed. The transmitting and receiving components of the instant device consist of two or more separate transmitting antennae of known position and orientation with respect to each other. Each transmitting antenna is driven one at a time by a pulsed, direct current signal. The receiving antennae measure the values of transmitted direct current magnetic fields one dimension at a time and those of the Earth's magnetic field as well, one dimension at a time. A computer is used to control circuit elements of the transmitting and receiving elements of the device and likewise functions to convert received signals into position and orientation outputs after having first effected a subtraction out of the overall value of the Earth'magnetic field.

REFERENCES:
patent: 3027951 (1962-04-01), Knapp et al.
patent: 4197855 (1980-04-01), Lewin
patent: 4303077 (1981-12-01), Lewin et al.
patent: 4396885 (1983-08-01), Constant
patent: 4622644 (1986-11-01), Hansen
"Determination of Depth of Shallowly Buried Objects by Electromagnetic Induction", by Das, et al., IEEE Transactions on Geoscience and Remote Sensing, vol. GE-23, No. 1, Jan. 1985.

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