Device for determining depth and direction of buried objects

Details Device for determining depth and direction of buried objects Device for determining depth and direction of buried objects

1991-09-19

1993-03-16

Snow, Walter E.

Electricity: measuring and testing

Of geophysical surface or subsurface in situ

For small object detection or location

324 67, G01V 308, G01V 310, G01R 1900

Patent

active

051948125

ABSTRACT:
Apparatus for locating buried objects such as underground pipes, cables or the like where a transmitter (1) generates an alternating current signal which is fed into the object to produce an alternating field emanating from the object, and a receiver (2) locates this radiation to identify the position of the object. A secondary transmitter (T) transmits a reference signal of the same frequency and phase as the original signal, and a signal processor in a receiver (2a) combines the two signals to eliminate the effects of noise.

REFERENCES:
patent: 3991363 (1976-11-01), Lathrop

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