Title:
GUIDANCE SYSTEM AND METHOD FOR UNDERGROUND BORING DEVICE
Document Type and Number:
Japanese Patent JPS63165686
Kind Code:
A
Abstract:
In a homing system (10) for directing an in-ground boring device (12) through the ground from its particular location (14) to a specific target point (16), an electromagnetic dipole field containing a predetermined homing signal is generated at the boring device (12) and detected by a receiving antenna (30) at the target point (16) or in a preferred embodiment where the target point (16) is below ground, at a ground level point (28) directly above or beyond the target point (16). Means are provided for producing in response to detection of the homing signal an internal electrical signal containing certain information relating to the actual path taken by the boring device (12) as compared to the path or course leading to the target point (16). The information from this latter signal is then transmitted by means of electromagnetic waves to a remote location (18) where it is used to steer the boring device (12) on a course toward the target point (16).
Inventors:
JIYON II MAASAA
ARUBAATO DABURIYU CHIYOO
ARUBAATO DABURIYU CHIYOO
Application Number:
JP24965087A
Publication Date:
July 08, 1988
Filing Date:
October 02, 1987
Export Citation:
Assignee:
FLOWMOLE CORP
International Classes:
E21B7/26; E21B7/04; E21B7/06; E21B47/022; (IPC1-7): E21B7/26
Attorney, Agent or Firm:
Minoru Nakamura (4 outside)