Boring technique for using locate point measurements for boring

Details Boring technique for using locate point measurements for boring Boring technique for using locate point measurements for boring

1998-03-25

2000-01-11

Patidar, Jay

Electricity: measuring and testing

Of geophysical surface or subsurface in situ

For small object detection or location

324329, 324 67, G01V 311

Patent

active

060140267

ABSTRACT:
A method is disclosed as part of an overall process in which a boring tool is moved through the ground within a given region along a particular path in an orientation which includes pitch. A locating signal is transmitted from the boring tool which signal exhibits a field defined forward point within a reference surface which field defined forward point is vertically above an inground forward point on the particular path through which the boring tool is likely to pass. The method establishes a predicted depth of the boring tool at the inground forward point by first identifying the field defined forward point. The signal strength of the locating signal is then measured at the field defined forward point as being representative of the depth of the boring tool at an inground upstream point which is the current location of the boring tool. With the boring tool at the upstream inground point, the pitch of the boring tool is determined. Using the measured signal strength and the determined pitch, the predicted depth of the boring tool is determined for the inground forward point based on the boring tool moving along an approximately straight path to the inground forward point.

REFERENCES:
patent: 5767678 (1998-06-01), Mercer

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