G - Physics – 01 – D
Patent
G - Physics
01
D
G01D 5/22 (2006.01) G01D 18/00 (2006.01) G01R 33/12 (2006.01) G01V 3/10 (2006.01) G01V 13/00 (2006.01) G01V 3/16 (2006.01)
Patent
CA 2328587
An electromagnetic sensing apparatus comprising an electromagnetic transmitter, at least one receiver device, at least one calibration device, a switch and a processing means. The electromagnetic transmitter generates a transmitter signal. The receiver device is spaced from the transmitter, senses a receiver local electromagnetic field proximate thereto and generating a receiver signal. The calibration device senses a calibration local electromagnetic field proximate thereto, generates a calibration signal. The calibration device is positioned such that the distance between the transmitter and the receiver device is greater than the distance between the transmitter and the calibration device. The switch is connected between the receiver device and the calibration device. The processing means includes a first input for receiving a signal from one of the receiver signal and the calibration signal and a second input for receiving a signal from the switch. The processing means compares the first input and the second input and monitors distortions in the transmitter signal. The sensing apparatus may include a plurality of receiver devices in a variety of different configurations.
Holladay John Scott III
Lee James Leonard Corbett
Geosensors Inc.
Hill & Schumacher
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