Method and apparatus for locating a buried element of inductive

Details Method and apparatus for locating a buried element of inductive Method and apparatus for locating a buried element of inductive

1995-05-10

1996-09-10

Strecker, Gerard R.

Electricity: measuring and testing

Of geophysical surface or subsurface in situ

For small object detection or location

324345, G01V 311, G01V 3165

Patent

active

055549349

ABSTRACT:
After having used a known locator and a known transmitter of an electromagnetic field to find the general line of an element such as a pipe 14, the transmitter is kept activated and a probe is used having a linear coil 32 on its tip 30 which lies with its axis parallel to the length of the tip. The probe includes a display and the probe is inserted in the ground and rocked to and fro to determine when the coil is in a minimum current condition. The probe is inserted further and the same procedure repeated. Eventually the probe contacts the pipe and lies in a radial plane with respect to the pipe.

REFERENCES:
patent: 3889179 (1975-06-01), Cutler
patent: 3907136 (1975-09-01), Christides et al.
patent: 3988663 (1976-10-01), Slough et al.
patent: 5438265 (1995-08-01), Eslambolchi et al.
"Solid-State Circuitry Spots Buried Treasure", Product Engineering/Jan. 13, 1969, p. 64.

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