US5394029A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Geomagnetic orientation sensor, means, and system
Assignee: Individual
•
Filing: 1993-02-17
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Granted: 1995-02-28
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Expires: 2013-02-17
Abstract
Abstract The Geomagnetic Orientation Sensor is a device used to determine the orientation of objects with respect to the magnetic field surrounding the earth. The sensor may also be used to determine orientation with respect to a local magnetic field, a local attenuation of the earth's magnetic field, or used as a pointer to track moving magnetic potentials. The device incorporates three mutually orthogonal Hall effect generator pairs, the output voltage differentials of which are directly proportional to the magnetic field intensity and direction relative to each generator pair. A set of three differential amplifier circuits detect and amplify the small voltages induced by the geomagnetic field. The resulting voltages, V X , V Y , and V Z , are multiplied by a constant to acquire three orthogonal angular displacement values with a range of 0 degrees to 180 degrees. The device is further arranged with an analog to digital converter for subsequent analysis of the three indicative voltages by a digital computer, and a computer program that performs the necessary calculations to convert the 180 degree maximum angular displacement values to pitch, roll, and yaw numbers with a maximum value of 360 degrees. A second computer program performs the various calculations necessary to describe and display the orientation of remote objects on a computer display. The preceding embodiment may be referred to as a computer input device.
Inventors
- 👤 John C. Gay
- 👤 Billy R. Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:33
CPC Classifications
G; G01; G01C; G01C17/00; G01C17/02; G01C17/28; G01R; G01R33/00; G01R33/02; G01R33/0206
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
99 words
A geomagnetic orientation sensor apparatus for generating three sets of voltage differentials representing the angular displacement of the geomagnetic flux with respect to said sensor apparatus comprising: (a) a plurality of Hall voltage generating means arranged in three groups such that each of said groups is mutually orthogonal. (b) a set of electrical connections to each of said groups by which a plurality of opposing currents may flow in opposite directions through each of said groups. (c) electrical connections to each of said groups such that three sets of voltage differentials may be detected by an electronic amplifying means.
Claim 2
Dependent Claim
99 words
A geomagnetic orientation sensor apparatus for generating three sets of voltage differentials representing the angular displacement of the geomagnetic flux with respect to said sensor apparatus comprising: (a) a plurality of Hall voltage generating means arranged in three groups such that each of said groups is mutually orthogonal. (b) a set of electrical connections to each of said groups by which a plurality of opposing currents may flow in opposite directions through each of said groups. (c) electrical connections to each of said groups such that three sets of voltage differentials may be detected by an electronic amplifying means.
Claim 3
Dependent Claim
18 words
The geomagnetic orientation sensor of claim 1 wherein said Hall voltage generating means are made of semiconductive material.
Claim 4
Dependent Claim
49 words
The geomagnetic orientation sensor of claim 1 wherein said electronic amplifying means includes: three differential amplifiers; first of said differential amplifiers, connected to first of said groups; second of said differential amplifiers, connected to second of said groups; third of said differential amplifiers, connected to third of said groups.
Claim 5
Dependent Claim
12 words
The geomagnetic orientation sensor of claim 1 further including a protective enclosure.
Claim 6
Dependent Claim
14 words
The geomagnetic orientation sensor of claim 4 wherein said protective enclosure is rectangular shaped.
Claim 7
Dependent Claim
15 words
The geomagnetic orientation sensor of claim 5 wherein said protective enclosure is made of epoxy.
Claim 8
Dependent Claim
119 words
A computer input device comprising a geomagnetic orientation sensing means for generating three sets of orthogonal voltage differentials representative of the angular displacement of the geomagnetic flux with respect to said sensing means comprising: (a) a plurality of Hall voltage generating means arranged in three groups such that each of said groups is mutually orthogonal to the others. (b) a set of electrical connections to each of said groups such that a plurality of opposing currents may flow through each of said groups. (c) electrical connections to each of said groups such that three sets of voltage differentials may be detected by an electronic amplifying means. (d) an interfacing means of connecting said electronic amplifying means to a computer.
Claim 9
Dependent Claim
119 words
A computer input device comprising a geomagnetic orientation sensing means for generating three sets of orthogonal voltage differentials representative of the angular displacement of the geomagnetic flux with respect to said sensing means comprising: (a) a plurality of Hall voltage generating means arranged in three groups such that each of said groups is mutually orthogonal to the others. (b) a set of electrical connections to each of said groups such that a plurality of opposing currents may flow through each of said groups. (c) electrical connections to each of said groups such that three sets of voltage differentials may be detected by an electronic amplifying means. (d) an interfacing means of connecting said electronic amplifying means to a computer.
Claim 10
Dependent Claim
19 words
The computer input device of claim 7 wherein said interfacing means is a high speed analog to digital converter.
Claim 11
Dependent Claim
49 words
The computer input device of claim 7 wherein said electronic amplifying means includes: three differential amplifiers; first of said differential amplifiers connected to first of said groups; second of said differential amplifiers, connected to second of said groups; third of said differential amplifiers connected to third of said groups.
Claim 12
Dependent Claim
18 words
The computer input device of claim 7 wherein said Hall voltage generating means are made of semiconductive material.
Claim 13
Dependent Claim
12 words
The computer input device of claim 7 further including a protective enclosure.
Claim 14
Dependent Claim
14 words
The computer input device of claim 11 wherein said protective enclosure is rectangular shaped.
Claim 15
Dependent Claim
15 words
The computer input device of claim 12 wherein said protective enclosure is made of epoxy.
Claim 16
Dependent Claim
133 words
A computer input device for controlling graphics on a computer graphic display comprising: (a) a protective enclosure; (b) a geomagnetic orientation sensor means, within the enclosure, for sensing the magnitude and direction of angular displacement of the geomagnetic flux for a continuous range of angles with respect to three orthogonal planes passing therethrough and for generating electrical signals representative thereof, and including a plurality of Hall voltage generating means arranged in three groups such that each of said groups are mutually orthogonal, and a set of electrical connections to each of said groups by which a plurality of opposing currents may flow in opposite directions through each of said groups; (c) interface means, coupled to the sensor means, for translating said electrical signals into digital graphics control signals for transmission to a computer.
Claim 17
Dependent Claim
133 words
A computer input device for controlling graphics on a computer graphic display comprising: (a) a protective enclosure; (b) a geomagnetic orientation sensor means, within the enclosure, for sensing the magnitude and direction of angular displacement of the geomagnetic flux for a continuous range of angles with respect to three orthogonal planes passing therethrough and for generating electrical signals representative thereof, and including a plurality of Hall voltage generating means arranged in three groups such that each of said groups are mutually orthogonal, and a set of electrical connections to each of said groups by which a plurality of opposing currents may flow in opposite directions through each of said groups; (c) interface means, coupled to the sensor means, for translating said electrical signals into digital graphics control signals for transmission to a computer.
Claim 18
Dependent Claim
18 words
The computer input device of claim 14 wherein said Hall voltage generating means are made of semiconductive material.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-02-27 | 1998-08-29 | 1999-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-02-27 | 2002-08-29 | 2003-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-02-27 | 2006-08-29 | 2007-02-28 | $7700.00 | Window Closed / Lapsed |