METAL DETECTOR AND GROUND-PENETRATING RADAR HYBRID HEAD AND MANUFACTURING METHOD THEREOF
First Claim
Patent Images
1. A ground penetrating radar (“
- GPR”
) and metal detector (“
MD”
) hybrid head comprising;
an MD sensor including at least one receive coil in a quadrupole configuration including a crossbar, and at least one transmit coil, the crossbar having a first axis parallel to a direction in which current flows in the crossbar; and
at least one GPR V-dipole antenna arranged in a plane perpendicular to the first axis of the crossbar so as to reduce coupling between the coils of the MD sensor and the antenna;
wherein the transmit coil has an outer perimeter, the receive coil has an outer perimeter, and wherein at least a portion of the V-dipole antenna is within a cylinder formed by the projection of one of the outer perimeter of the receive coil or the transmit coil onto a plane perpendicular to a central axis of the V-dipole antenna.
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Abstract
A hybrid ground penetrating radar (GPR)/metal detector (MD) head includes a V-dipole GPR antenna and transmit and receive MD coils. One of the MD coils is arranged in a quadrupole configuration with a crossbar, and the V-dipole antenna is perpendicular to the crossbar. The legs of the V-dipole antenna may straddle the crossbar or may be on one side of the crossbar. The MD coils may be fabricated on a printed circuit board, which may be at a non-normal angle with respect to a central axis of the V-dipole antenna.
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Citations
20 Claims
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1. A ground penetrating radar (“
- GPR”
) and metal detector (“
MD”
) hybrid head comprising;an MD sensor including at least one receive coil in a quadrupole configuration including a crossbar, and at least one transmit coil, the crossbar having a first axis parallel to a direction in which current flows in the crossbar; and at least one GPR V-dipole antenna arranged in a plane perpendicular to the first axis of the crossbar so as to reduce coupling between the coils of the MD sensor and the antenna; wherein the transmit coil has an outer perimeter, the receive coil has an outer perimeter, and wherein at least a portion of the V-dipole antenna is within a cylinder formed by the projection of one of the outer perimeter of the receive coil or the transmit coil onto a plane perpendicular to a central axis of the V-dipole antenna. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 19, 20)
- GPR”
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15. A method for manufacturing an MD/GPR hybrid head, the method comprising the steps of:
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forming an MD sensor including at least one receive coil in a quadrupole configuration including a crossbar, and at least one transmit coil, the crossbar having a first axis parallel to a direction in which current flows in the crossbar; and positioning at least one GPR V-dipole antenna in a plane perpendicular to the first axis of the crossbar so as to reduce coupling between the coils of the MD sensor and the antenna; wherein the transmit coil has an outer perimeter, the receive coil has an outer perimeter, and wherein at least a portion of the V-dipole antenna positioned within a cylinder formed by the projection of one of the outer perimeter of the receive coil or the transmit coil onto a plane perpendicular to a central axis of the V-dipole antenna. - View Dependent Claims (16, 17, 18)
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Specification