Determination of actual path of inground device based on...

Details Determination of actual path of inground device based on... Determination of actual path of inground device based on...

2005-10-11

2005-10-11

Patidar, Jay (Department: 2862)

Electricity: measuring and testing

Of geophysical surface or subsurface in situ

For small object detection or location

Reexamination Certificate

active

06954073

ABSTRACT:
An inground device and a portable locator are provided as well as an information generating arrangement for generating a set of positional information characterizing an inground position of the inground device relative to the portable locator. A transmitter transmits a dipole field from the inground device and a receiver senses the dipole field at a series of spaced-apart reference points along a reference path which reference points are associated one-for-one with a series of spaced-apart measuring locations of the inground device, so that each reference point on the reference path is specifically determined by an associated one of the measuring locations of the portable device. The set of positional information corresponds to each of the reference points and is used to establish an actual path taken by the inground device and containing the measurement locations. The system can use locate points in a technique for finding the reference points.

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Radiodetection Limited, Monitoring the Progress of Horizontal Boring Tools, Apr. 1990, Radiodetection Limited Tradeshow Handout.

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