Homing technique for an in-ground boring device

Details Homing technique for an in-ground boring device Homing technique for an in-ground boring device

1986-10-02

1989-11-14

Hille, Rolf

Communications: directive radio wave systems and devices (e.g.,

Directive

Position indicating

175 26, 175 45, 324346, 340855, 343719, E21B 4400, E21B 47022

Patent

active

048810835

ABSTRACT:
The homing technique for directing an in-ground boring device through the ground from its particular location to a specific target point is disclosed herein. In accordance with this technique, an electromagnetic dipole field containing a predetermined homing signal is generated at the boring device and detected by a specifically configured receiving antenna arrangement at the target point or, in a preferred embodiment where the target point is below ground, at a ground level point directly above or beyond the target point. Means are provided in response to detection of the homing signal for producing an internal electrical signal containing certain information relating to the actual path taken by the boring device as compared to the path or course leading to the target point. The information from this latter signal is then transmitted by means of electromagnetic waves to a remote location where it is used to steer the boring device on a course toward the target.

REFERENCES:
patent: 2291450 (1942-07-01), Case
patent: 2908863 (1959-10-01), Neff
patent: 3589454 (1971-06-01), Coyne
patent: 3731752 (1973-05-01), Schad
patent: 3900878 (1975-08-01), Tsao
patent: 4403664 (1983-09-01), Sullinger
patent: 4646277 (1987-02-01), Bridges et al.
patent: 4710708 (1987-12-01), Rorden et al.

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