US4328545A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Driverless vehicle autoguide by light signals and two directional detectors
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1979-08-01
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Granted: 1982-05-04
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Expires: 1999-08-01
Abstract
Abstract An unmanned vehicle capable of being automatously guided towards a predetermined destination by the geometrical computation of light signals received by at least two on-board detectors which relate the direction of each signal received to the axis of the vehicle. Useful in restricted areas such as automatic warehouses and loading bays.
Inventors
- 👤 James R. Halsall
- 👤 Michael H. E. Larcombe
- 👤 James R. Robertson
- 👤 Mark A. M. Rogers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:54
CPC Classifications
G; G06; G06Q; G06Q10/00; G06Q10/08; G01; G01S; G01S5/00; G01S5/16; G05; G05D; G05D1/00; G05D1/02; G05D1/021; G05D1/0231; G05D1/0234; G05D1/0242; G05D1/0276; G05D1/0278; G05D1/0255; G05D1/0268; G05D1/0274
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
156 words
A vehicle moveable within a predetermined area and having navigational means for determining its position and orientation, in combination with a plurality of beacons which are located at stations fixed with respect to the area such that the vehicle, when in any position within the area, can receive light from beacons of at least two fixed stations; the navigational means comprising: at least two direction-sensitive light detectors mounted on the vehicle, each detector comprising means for detecting light which it receives from the beacons, and means responsive to the detection of that light for indicating the direction from which the light is received so that the bearings of each fixed station with respect to the orientation of the vehicle are obtained, and means for correlating the bearings obtained by the light detection-responsive means with the positions of the fixed stations with respect to the area, and the positions of the detectors with respect to the vehicle.
Claim 2
Dependent Claim
156 words
A vehicle moveable within a predetermined area and having navigational means for determining its position and orientation, in combination with a plurality of beacons which are located at stations fixed with respect to the area such that the vehicle, when in any position within the area, can receive light from beacons of at least two fixed stations; the navigational means comprising: at least two direction-sensitive light detectors mounted on the vehicle, each detector comprising means for detecting light which it receives from the beacons, and means responsive to the detection of that light for indicating the direction from which the light is received so that the bearings of each fixed station with respect to the orientation of the vehicle are obtained, and means for correlating the bearings obtained by the light detection-responsive means with the positions of the fixed stations with respect to the area, and the positions of the detectors with respect to the vehicle.
Claim 3
Dependent Claim
41 words
A vehicle as claimed in claim 1 wherein each detector further comprises means for receiving light unidirectionally from the beacons, and means for rotatably mounting said light-receiving means so that it receives light from each direction in turn as it rotates.
Claim 4
Dependent Claim
49 words
A vehicle as claimed in claim 2 wherein the means for indicating the direction from which the light is received comprises means for providing a signal corresponding to the orientation of the unidirectional light-receiving means with respect to the vehicle, in response to detection of light from a beacon.
Claim 5
Dependent Claim
18 words
A vehicle as claimed in claim 3 wherein the signal changes in discrete steps as the detector rotates.
Claim 6
Dependent Claim
26 words
A vehicle as claimed in claim 4 wherein the signal is in a binary coded form, each discrete step being represented by an exclusive binary word.
Claim 7
Dependent Claim
14 words
A vehicle as claimed in claim 5 wherein the code is a Gray Code.
Claim 8
Dependent Claim
31 words
A vehicle as claimed in claims 1, 2, 3, 4, 5 or 6 wherein said at least two detectors comprises at least three detectors mounted on the vehicle in triangular array.
Claim 9
Dependent Claim
21 words
A vehicle as claimed in claims 1, 2, 3, 4, 5 or 6 further comprising means for synchronously rotating the detectors.
References Cited (Backward Citations)
GB1173442A
Cited
US3710335A
Cited
GB1313928A
Cited
US3687556A
Cited
US3690767A
Cited
US3924107A
Cited
US3881568A
Cited
US3875405A
Cited
US4039916A
Cited
GB1448623A
Cited
DE2459358A1
Cited
US4119900A
Cited
US3975633A
Cited
US4112294A
Cited
US4099591A
Cited
US4137984A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-05-03 | 1985-11-02 | 1986-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-03 | 1989-11-02 | 1990-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-03 | 1993-11-02 | 1994-05-04 | $7700.00 | Window Closed / Lapsed |