Ground mineralisation rejecting metal detector (receive signal weighting)
AssigneeBHC Consulting Pty., Ltd.
InventorBruce Halcro Candy
Life of this patent
Estimating the term…
Abstract
Metal detection apparatus wherein a transmit coil will transmit magnetic pulses, and the processing Circuitry will weight a receive signal more heavily soon after a transmit pulse transition and less heavily after a longer period following the transmit pulse transition.
Claims3
In a metal detector apparatus including a transmit coil adapted to transmit magnetic field pulses when operating with electrical current flowing through the said transmit coil, transmit and receive timing control circuitry, power supplies, and receive signal circuitry and receive signal processing circuitry, a method:
- wherein the transmit coil transmits magnetic pulses;
- and the processing circuitry accumulates a receive signal which is weighted more heavily soon after a transmit pulse transition and less heavily after a longer period following the said transmit pulse transition.
2 A metal detector apparatus of a type including a transmit coil adapted to transmit magnetic field pulses when operating with electrical current flowing through the said transmit coil, transmit and receive timing control circuitry, power supply means, a receive signal circuitry and receive signal processing circuitry, wherein the transmit coil is arranged to transmit magnetic pulses, and the processing circuitry is adapted to accumulate a receive signal which is weighted more heavily soon after a transmit pulse transition and less heavily after a longer period following the said transmit pulse transition.
In a metal detector apparatus including a transmit coil adapted to transmit magnetic field pulses when operating with electrical current flowing through the said transmit coil, transmit and receive timing control circuitry, power supplies, and receive signal circuitry and receive signal processing circuitry, a method substantially as described in the specification with reference to and as illustrated by the accompanying drawings.
Dependencies are inferred from the claim text.