MAGNETIC COMMUNICATION THROUGH METAL BARRIERS
First Claim
1. A method for wireless transmission of a signal through a metal barrier, comprising the steps of:
- generating a first signal;
producing a first time-varying magnetic field onto which the first signal is impressed on one side of the metal barrier; and
detecting the first time-varying magnetic field on the opposite side of the metal barrier from the side thereof where the first time-varying magnetic field is produced.
1 Assignment
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Accused Products
Abstract
A wireless magnetic through-hull communications apparatus and method which permit higher data-rate communications through materials than presently available using acoustic techniques is described. A signal source on one side of a barrier is directed into a coil driver which generates an amplified, modulated signal responsive thereto. The resulting signal is used to drive a transmitter coil which generates a time-varying magnetic field that penetrates the barrier as well as any gaps comprising water, air or other material between the barrier and the transmitter coil. On the other side of the barrier, and perhaps through additional gaps comprising water, air or other material, a receiver coil detects the time-varying magnetic field. This signal may be amplified and then digitized by a signal processor. The signal processor may then communicate with a data processing and/or display unit, another sensor or some other device. Electric power may also be transmitted through the barrier for providing power to instrumentation without the need for batteries.
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Citations
22 Claims
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1. A method for wireless transmission of a signal through a metal barrier, comprising the steps of:
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generating a first signal;
producing a first time-varying magnetic field onto which the first signal is impressed on one side of the metal barrier; and
detecting the first time-varying magnetic field on the opposite side of the metal barrier from the side thereof where the first time-varying magnetic field is produced. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. Apparatus for wireless transmission of a signal through a metal barrier, comprising in combination:
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first means for generating a first chosen signal;
a first electrically conductive coil effective for generating magnetic fields disposed on one side of said metal barrier;
a first coil driver for receiving the signal and for driving said first coil such that a first time-varying magnetic field is generated bearing the first signal;
first means responsive to the first time-varying magnetic field and disposed on the opposite side of said metal barrier from said first coil; and
first means for detecting the response of said first means responsive to the first time-varying magnetic field. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method for bidirectional wireless transmission of a signal through a metal barrier, comprising the steps of:
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generating a first signal;
producing a first time-varying magnetic field onto which the first signal is impressed on one side of the metal barrier;
detecting the first time-varying magnetic field on the opposite side of the metal barrier from the side thereof where the first time-varying magnetic field is produced;
generating a second signal;
producing a second time-varying magnetic field onto which the second signal is impressed on the side of the metal barrier opposite to that where the first time-varying field is produced; and
detecting the second time-varying magnetic field on the side of the metal barrier where the first time-varying magnetic field is produced, whereby said wireless transmission of a signal through a metal barrier is bidirectional. - View Dependent Claims (20)
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21. Apparatus for bidirectional wireless transmission of a signal through a metal barrier, comprising in combination:
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first means for generating a first chosen signal;
a first electrically conductive coil effective for generating magnetic fields disposed on one side of said metal barrier;
a first coil driver for receiving the signal and for driving said first coil such that a first time-varying magnetic field is generated bearing the first signal;
first means responsive to the first time-varying magnetic field and disposed on the opposite side of said metal barrier from said first coil;
first means for detecting the response of said first means responsive to the first time-varying magnetic field;
second means for generating a second chosen signal;
a second electrically conductive coil effective for generating magnetic fields disposed on the other side of said metal barrier from said first coil;
a second coil driver for receiving the second signal and for driving said second coil such that a second time-varying magnetic field is generated bearing the second signal;
second means responsive to the second time-varying magnetic field and disposed on the same side of said metal barrier as said first coil; and
second means for detecting the response of said second means responsive to the second time-varying magnetic field, whereby said wireless transmission of a signal through a metal barrier is bidirectional. - View Dependent Claims (22)
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Specification