| 摘要 |
Establishing a location of at least a portion of a particular path taken by a boring tool uses a portable locator and information generating arrangement for generating a set of positional information characterizing a position of the boring tool relative to a locating position. A transmitter arrangement transmits an electromagnetic signal from the boring tool and a sensing arrangement including less than five spaced-apart sensors at the portable locator senses the electromagnetic signal at a series of spaced-apart reference locations along a reference path, associated one-for-one with spaced-apart measuring locations of the boring tool, for locator movement along the particular path, so each reference location is determined by an associated measuring location. A processing arrangement uses the set of positional information that is obtained for each reference location to establish an actual path of the boring tool, containing the measurement locations, corresponding generally to at least a portion of the particular path.
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