Detector for Calculating a Depth of a Buried Conductor
First Claim
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1. A detector for calculating a depth of a buried conductor, the detector comprising:
- a first antenna;
a second antenna having its axis parallel to an axis of the first antenna and spaced a distance s from the first antenna;
a third antenna having its axis parallel to the axes of the first and second antennas and spaced a distance 2s from the first antenna and a distance s from the second antenna;
means for comparing magnetic fields at the first and second antennas to produce a first compared value;
means for comparing magnetic fields at the second and third antennas to produce a second compared value; and
means for calculating the depth of said buried conductor based on the first and second compared values.
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Abstract
A detector for calculating a depth of a buried conductor comprises three parallel antennas B, M, T. The second antenna M is spaced a distance s from the first antenna B and the third antenna T is a distance 2s from the first antenna B and a distance s from the second antenna M. The outputs of the first and second antennas B, M are compared and the outputs from the second and third antennas M, T are compared. The depth of the buried conductor is calculated based on the first and second compared values.
15 Citations
21 Claims
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1. A detector for calculating a depth of a buried conductor, the detector comprising:
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a first antenna; a second antenna having its axis parallel to an axis of the first antenna and spaced a distance s from the first antenna; a third antenna having its axis parallel to the axes of the first and second antennas and spaced a distance 2s from the first antenna and a distance s from the second antenna; means for comparing magnetic fields at the first and second antennas to produce a first compared value; means for comparing magnetic fields at the second and third antennas to produce a second compared value; and means for calculating the depth of said buried conductor based on the first and second compared values. - View Dependent Claims (2, 3, 4, 5, 6, 7, 11, 12)
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8. A method of calculating a depth of a buried conductor, the method comprising:
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providing a first antenna; providing a second antenna having its axis parallel to an axis of the first antenna and spaced a distance s from the first antenna; providing a third antenna having its axis parallel to the axes of the first and second antennas and spaced a distance 2s from the first antenna and a distance s from the second antenna; comparing magnetic fields at the first and second antennas to produce a first compared value; comparing magnetic fields at the second and third antennas to produce a second compared value; and calculating the depth of said buried conductor based on the first and second compared values. - View Dependent Claims (9, 10, 13, 14)
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15. A detector for calculating a depth of a buried conductor, the detector comprising:
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a first antenna; a second antenna having its axis parallel to an axis of the first antenna and spaced a distance s from the first antenna; a third antenna having its axis parallel to the axes of the first and second antennas and spaced a distance 2s from the first antenna and a distance s from the second antenna; and a microprocessor, configured to; compare magnetic fields at the first and second antennas to produce a first compared value; compare magnetic fields at the second and third antennas to produce a second compared value; and calculate the depth of said buried conductor based on the first and second compared values. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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Specification