04945305 is referenced by 472 patents and cites 5 patents.

A device for measuring the position (location and orientation), in the six degrees of freedom of receiving antennae (3) with respect to transmitting antennae (2) utilizing pulsed DC magnetic signals. The transmitting and receiving components consist of two or more transmitting antennae of known location and orientation with respect to each other. The transmitting antenna (2) are driven one at a time (or in the case of three or more antennae one or two at a time) by a pulsed, direct current signal. The receiving antennae (3) measure the transmitted direct current magnetic fields and the earth's magnetic field. A computer (5) is used to control the transmitting and receiving elements and to convert the received signals into location and orientation outputs.

Title
Device for quantitatively measuring the relative position and orientation of two bodies in the presence of metals utilizing direct current magnetic fields
Application Number
917389
Publication Number
4945305
Application Date
April 11, 1989
Publication Date
July 31, 1990
Inventor
Ernest B Blood
Burlington
VT, US
Agent
Davis Bujold & Streck
Assignee
Ascension Technology Corporation
VT, US
IPC
G01S 5/04
G01B 7/14
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