An above-ground arrangement for and method of locating a discret

Details An above-ground arrangement for and method of locating a discret An above-ground arrangement for and method of locating a discret

1986-05-22

1989-02-21

Strecker, Gerard R.

Electricity: measuring and testing

Of geophysical surface or subsurface in situ

For small object detection or location

175 45, 324207, 342459, G01V 3165, G01S 500, G01B 714

Patent

active

048068691

ABSTRACT:
A technique for locating the position of a boring device within the ground with respect to a particular reference location along an above ground path directly over the intended course to be taken by the boring device is disclosed herein. This technique utilizes an electromagnetic field which is emitted from the device and an above-ground arrangement for simultaneously sensing the strength of the field at a number of distinct points. The particular sensing points are selected so that the arrangment never has to leave the path directly above the boring devices intended course to locate the boring device, even if the latter deviates laterally from the path.

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