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Method and arrangement for locating a boring tool using a three-antennae vector sum

DC
  • US 5,990,683 A
  • Filed: 04/13/1998
  • Issued: 11/23/1999
  • Est. Priority Date: 03/01/1991
  • Status: Expired due to Fees
First Claim
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1. A method of determining the distance between a point of observation and a generally horizontally extending dipole magnetic field transmitter which is beneath the point of observation and disposed within a given vertical plane, comprising the steps of:

  • (a) measuring the field strength of the magnetic field at the point of observation using three antennae, a first two of which are disposed within said given vertical plane and oriented orthogonally to each other and the third one of which is orthogonal to the plane defined by the first two antennae(b) calculating the distance between the point of observation and the transmitter as a function of the vector sum of the field strengths measured by the antennae; and

    (c) displaying the calculated distance.

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