Magnetic locating and tracing system and method using dual-antenna transmitter to distinguish between concealed adjacent objects
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United States of America Patent
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Apr 4, 1989
Grant Date -
N/A
app pub date -
May 6, 1987
filing date -
May 6, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Locating and tracing of a concealed, elongated, conductive object, such as a buried pipe or cable, is enhanced, when a second such object is adjacent to the first, by employing a transmitter having a pair of antennae that induce distinguishable currents in the respective objects. A receiver movable with respect to the transmitter and with respect to the objects produces an output signal dependent upon the sensing of fields associated with both currents. The position of the transmitter relative to the objects is adjusted to optimize the output signal.
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