Wireless shipboard data coupler
First Claim
1. A wireless data coupler system comprised of:
- means for generating an encoded digital data bit stream;
means for converting said data bit stream into a first modulated electrical current;
a structure conducting said first modulated electrical current having a first and second side and a preexisting discontinuity;
means for injecting said first modulated electrical current into said first side of said structure thereby causing an electrically induced field current to be generated which flows around the edge of said discontinuity to said second side of said structure;
means for detecting a pattern of surface current generated by said electrically induced field current on said second side of said structure, and producing a second modulated electrical current;
means for processing said second modulated electrical current to produce an output digital data bit stream; and
means for displaying and recording said output digital data bit stream.
1 Assignment
0 Petitions
Accused Products
Abstract
The wireless shipboard data coupler allows transmission of data through steel ship bulkheads and submarine pressure hulls without the need for special wiring penetrations. Shipboard sensing data with a 1.0 MHz current is injected into the steel plating adjacent to a ships bulkhead, or onto the pressure hull at any penetration providing an electrical path or discontinuity to the opposing side of the bulkhead or pressure hull through the use of copper-plated, threaded electrodes. The injected current flows as a surface, or "skin effect" current between the electrodes and in an indirect, spread, pattern wrapping around the edge of the penetration. This produces a pattern of surface currents on the opposite side of the ships bulkhead or submarine pressure hull. As the injected current is modulated, the data is received on the other side of the bulkhead or pressure hull using coupling loops to sensing the electrical field generated by the surface currents.
13 Citations
43 Claims
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1. A wireless data coupler system comprised of:
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means for generating an encoded digital data bit stream; means for converting said data bit stream into a first modulated electrical current; a structure conducting said first modulated electrical current having a first and second side and a preexisting discontinuity; means for injecting said first modulated electrical current into said first side of said structure thereby causing an electrically induced field current to be generated which flows around the edge of said discontinuity to said second side of said structure; means for detecting a pattern of surface current generated by said electrically induced field current on said second side of said structure, and producing a second modulated electrical current; means for processing said second modulated electrical current to produce an output digital data bit stream; and means for displaying and recording said output digital data bit stream. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A wireless data coupler system comprised of:
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a sensor generating an input data bit stream and modulating the input data bit stream; a transmitter for converting the modulated data bit stream into a first modulated electrical current; a structure conducting the first modulated electrical current having a first and second side and a preexisting discontinuity; a plurality of drive electrodes attached to the transmitter and the first side of the structure to inject the first modulated electrical current into the structure; an induction coil on the second side of the structure to detect a magnetic field generated by the first modulated electrical current flowing to the second side of the structure through the discontinuity and producing a second modulated electrical current; a receiver for processing the second modulated electrical current to produce an output data bit stream essentially the same as the input data bit stream; a display for displaying the output data bit stream; and a recorder for recording the output data bit stream. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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31. A wireless data coupler system comprised of:
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a sensor generating an input data bit stream and modulating the input data bit stream; a transmitter for converting the modulated input data bit stream into a first modulated electrical current; a structure conducting the first modulated current having a first side and a second side and a preexisting discontinuity; a plurality of drive electrodes attached to the transmitter and the first side of the structure to inject the first modulated electrical current into the structure; a multiple of sensing electrodes attached to the second side of the structure to detect a second modulated electrical current flowing around the structure through the discontinuity to the second side of the structure; a receiver for processing the second modulated electrical current to produce an output data bit stream essentially the same as the input data bit stream; a display for displaying the output data bit stream; and a recorder for recording the output data bit stream. - View Dependent Claims (32, 33, 34, 35, 36, 37, 38, 39, 40, 41)
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42. A method for transmitting a data bit stream through a structure conducting electrical current having a preexisting discontinuity comprising, the steps of:
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generating a data bit stream; converting the data bit stream into a first modulated electrical current; transmitting the first modulated electrical current into the structure on a first side of the structure so as to generate a magnetic field within the structure; receiving the magnetic field within the structure on a second side of the structure; converting the magnetic field into a second modulated electrical current; filtering the second modulated electrical current to remove out-of-band signal components; converting the filtered second modulated electrical current into an unmodulated output data bit stream; transmitting the output data bit stream to a display and recording device; and displaying and recording the output data bit stream.
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43. A method for transmitting a data bit stream through a structure conducting electrical current having a preexisting discontinuity, comprising the steps of:
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generating the data bit stream; converting the data bit stream into a first modulated electrical current; transmitting the first modulated electrical current into a first side of the structure so as to generate a second modulated electrical current within the structure; detecting an electrical potential generated by the second modulated electrical current on a second side of the structure; amplifying, demodulating, and filtering the second modulated electrical current to remove out-of-band signals that may be present thereon thereby producing a demodulated second electrical current; converting the demodulated second electrical current to an output data bit stream; and displaying and recording the output data bit stream.
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Specification