Helmet-mounted sighting system
First Claim
1. An electromagnetic system for use in determining the orientation of a helmet comprising:
- a transmitting antenna for transmitting electromagnetic field vectors, said transmitting antenna having at least two transmitting coils;
a receiving antenna having three non-coplanar receiving coils fixed to the helmet, said receiving coils sensing the electromagnetic field vectors transmitted by said transmitting antenna;
control means for sampling said electromagnetic field vectors sensed by each of said receiver coils, said control means including orientation means for determining the orientation of said helmet using said sensed and said transmitted electromagnetic field vectors, said control means having a first output for supplying said orientation to a utilization means, and a second output;
driving means for supplying driving energy to said transmitting antenna for transmitting said electromagnetic field vectors; and
,selector means connected to said second output from said control means and to said driving means for sequentially energizing said at least two transmitting coils.
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Accused Products
Abstract
An electromagnetic system for determining the orientation including position of a helmet worn by a pilot is disclosed, having a transmitting antenna for transmitting electromagnetic field vectors, a receiving antenna for sensing the electromagnetic field vectors, a control apparatus responsive to the sensed electromagnetic field vectors and the transmitted electromagnetic field vectors for determining the orientation including location of the helmet, the control apparatus having a first output for supplying the orientation to a utilization apparatus and a second output, a driver for supplying driving energy to the transmitting antenna coils, and a selector switch connected to the second output of the control apparatus and to the driver for sequentially energizing the coils of the transmitting antenna.
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Citations
42 Claims
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1. An electromagnetic system for use in determining the orientation of a helmet comprising:
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a transmitting antenna for transmitting electromagnetic field vectors, said transmitting antenna having at least two transmitting coils; a receiving antenna having three non-coplanar receiving coils fixed to the helmet, said receiving coils sensing the electromagnetic field vectors transmitted by said transmitting antenna; control means for sampling said electromagnetic field vectors sensed by each of said receiver coils, said control means including orientation means for determining the orientation of said helmet using said sensed and said transmitted electromagnetic field vectors, said control means having a first output for supplying said orientation to a utilization means, and a second output; driving means for supplying driving energy to said transmitting antenna for transmitting said electromagnetic field vectors; and
,selector means connected to said second output from said control means and to said driving means for sequentially energizing said at least two transmitting coils. - 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. An electromagnetic system for determining the orientation of a helmet worn by the pilot of a vehicle comprising:
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a transmitting antenna having at least two transmitting coils generating electromagnetic field vectors; a receiving antenna having three non-coplanar receiving coils fixed to said helmet for sensing said electromagnetic field vectors transmitted by said transmitting antenna; driving means for sequentially energizing said transmitting coils for generating said electromagnetic field vectors; orientation determining means connected to said receiving antenna and to said driving means for determining a rotation matrix for the rotation of said receiving antenna from said transmitting antenna based upon both the transmitted electromagnetic field vectors and the sensed electromagnetic field vectors; and
,implementation means connected to said orientation determining means for utilizing the orientation of said helmet for the control of a vehicle apparatus. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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31. An electromagnetic system for determining the orientation of a helmet worn by the pilot of a vehicle comprising:
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a transmitting antenna having at least two transmitting coils for generating electromagnetic field vectors; a receiving antenna having three non-coplanar receiving coils fixed to said helmet for sensing said electromagnetic field vectors transmitted by said transmitting antenna; driving means for sequentially energizing said transmitting coils for generating said electromagnetic field vectors; orientation determining means connected to said receiving coils and to said driving means for determining a rotation matrix for the rotation of said receiving antenna from said transmitting antenna by using the eigenvalues and eigenvectors determined from a transmitting matrix based upon said transmitted electromagnetic field vectors and a received matrix based upon said sensed electromagnetic field vectors; and
,implementation means connected to said orientation determining means for utilizing the orientation of said helmet for the control of a vehicle apparatus. - View Dependent Claims (32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42)
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Specification