US3952308A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Perspective navigation system employing the inner comparisons of signal phases received on an aircraft by a plurality of sensors
Assignee: Individual
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Filing: 1974-05-21
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Granted: 1976-04-20
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Expires: 1994-05-21
Abstract
Abstract A perspective display of a runway is obtained on an aircraft by sequentially transmitting signals from selected marker positions about the runway. A plurality of sensors are positioned on the aircraft with a first sensor being compared to a reference frequency and the other sensors being compared each with the first sensor. The comparisons are made measuring the accumulated phase difference during a given time with these phase differences being equivalent to distances which are then fed to a computer and displayed as a perspective view.
Inventors
- 👤 Uve H. W. Lammers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:01
CPC Classifications
G; G01; G01S; G01S1/00; G01S1/02; G01S1/08
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
181 words
A system for displaying a perspective scene having a plurality of markers as viewed from a moving remote reference frame comprising: a. means for transmitting signals having a reference frequency from the plurality of markers in a sequence; b. a reference frequency source at the remote reference frame; c. first, second, and third means for sensing in sequence the transmitted signals with the first, second, and third sensing means having a predetermined spacing at the remote reference frame; d. a first measuring means, measuring the phase difference between the signals from the first and second sensing means; e. a second measuring means, measuring the phase difference between the signals from the first and third sensing means; f. a third measuring means, measuring the phase difference between the signals from the first sensing means and the reference frequency source; g. means for computing the radial and angular positions of each marker with respect to the reference frame, the computing means being fed by the first, second, and third measuring means; and h. means for displaying the positions fed by the computing means.
Claim 2
Independent Claim
181 words
A system for displaying a perspective scene having a plurality of markers as viewed from a moving remote reference frame comprising: a. means for transmitting signals having a reference frequency from the plurality of markers in a sequence; b. a reference frequency source at the remote reference frame; c. first, second, and third means for sensing in sequence the transmitted signals with the first, second, and third sensing means having a predetermined spacing at the remote reference frame; d. a first measuring means, measuring the phase difference between the signals from the first and second sensing means; e. a second measuring means, measuring the phase difference between the signals from the first and third sensing means; f. a third measuring means, measuring the phase difference between the signals from the first sensing means and the reference frequency source; g. means for computing the radial and angular positions of each marker with respect to the reference frame, the computing means being fed by the first, second, and third measuring means; and h. means for displaying the positions fed by the computing means.
Claim 3
Dependent Claim
25 words
A system for displaying a perspective view according to claim 1 which further comprises time interval means for controlling the sequence for transmitting the signals.
Claim 4
Dependent Claim
40 words
A system for displaying a perspective view according to claim 2 wherein the means for displaying the positions comprise an oscilloscope having vertical and horizontal inputs fed by the computing means and an activating signal from the time interval means.
Claim 5
Independent Claim
112 words
A method of displaying a perspective representation of an object from a remote and linearly moving reference frame comprising: a. transmitting reference signals from beacons positioned about the object; b. sensing the transmitted signals from first, second, and third sensors positioned on the moving reference frame; c. phase comparing the signal from the first sensor with a signal from a reference frequency source; d. phase comparing the signal from the first sensor with the signal from the second sensor; e. phase comparing the signal from the first sensor with the signal from the third sensor; f. computing perspective position coordinates based on the phase comparing; and g. displaying the perspective position coordinates.
Claim 6
Independent Claim
112 words
A method of displaying a perspective representation of an object from a remote and linearly moving reference frame comprising: a. transmitting reference signals from beacons positioned about the object; b. sensing the transmitted signals from first, second, and third sensors positioned on the moving reference frame; c. phase comparing the signal from the first sensor with a signal from a reference frequency source; d. phase comparing the signal from the first sensor with the signal from the second sensor; e. phase comparing the signal from the first sensor with the signal from the third sensor; f. computing perspective position coordinates based on the phase comparing; and g. displaying the perspective position coordinates.
Claim 7
Dependent Claim
24 words
A method of viewing a perspective representation of an object according to claim 4 wherein the transmitting of the beacon signals is performed sequentially.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-04-20 | 1979-10-20 | 1980-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-20 | 1983-10-20 | 1984-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-20 | 1987-10-20 | 1988-04-20 | $7700.00 | Window Closed / Lapsed |