Resonant electromagnetic sensor
First Claim
1. A sensor capable of detecting changes in a target material comprising:
- at least two coils and at least one transmit coil and at least one receive coil;
the transmit coil having been tuned to a desired resonant frequency or frequencies is brought to that frequency by inducing an oscillating electromotive force thus creating an oscillating magnetic field also at the resonant frequency extending from the transmit coil, such that the field is allowed to propagate into a target material;
the oscillating magnetic field then being intercepted by a receive coil with a resonant frequency which is in proximity to the resonant frequency of the transmit coil such that the output signal of the receive coil is improved for desired detection of features, flaws, and conditions of the target material.
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Abstract
The present device relates to a sensor capable of detecting changes in the electromagnetic field it generates when in proximity to either conductive or nonconductive materials. This occurs by way of oscillating a transmit coil with an electro motive force at a resonant frequency thus creating an electromagnetic field. The magnetic field passes through a target of either conductive or nonconductive material and is then intercepted by a receive coil which likewise oscillates at a resonant frequency, which when in proximity to the transmit coil and transmit coils resonant frequency produces an enhanced signal by way of the interaction of the respective resonant frequencies and receive coil output.
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Citations
14 Claims
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1. A sensor capable of detecting changes in a target material comprising:
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at least two coils and at least one transmit coil and at least one receive coil; the transmit coil having been tuned to a desired resonant frequency or frequencies is brought to that frequency by inducing an oscillating electromotive force thus creating an oscillating magnetic field also at the resonant frequency extending from the transmit coil, such that the field is allowed to propagate into a target material; the oscillating magnetic field then being intercepted by a receive coil with a resonant frequency which is in proximity to the resonant frequency of the transmit coil such that the output signal of the receive coil is improved for desired detection of features, flaws, and conditions of the target material. - View Dependent Claims (2, 3, 4, 5, 6, 7, 14)
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8. A sensor capable of detecting changes in various target materials comprising
at least 2 coils and at least one transmit coil and one receive coil; -
the transmit coil having been tuned to a desired resonant frequency or frequencies is brought to that frequency by inducing an oscillating electromotive force, thus creating an oscillating magnetic field also at the resonant frequency extending from the transmit coil, such that the field is allowed to propagate into a target material; the oscillating magnetic field then being intercepted by a receive coil with a resonant frequency which is in proximity to the resonant frequency of the transmit coil such that the output signal of the receive coil is improved for desired detection of features, flaws and conditions of the target; the sensor also incorporating a core of material suitable to selectively enhance and concentrate the oscillating magnetic field being generated by the transmit coil and positioned to derive maximum out of the receive coil. - View Dependent Claims (9, 10, 11, 12, 13)
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Specification