Night convoy maneuver system
US6327028A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 6, 1999 |
| Grant date | Dec 4, 2001 |
| Priority date | — |
| Expiry date | Oct 6, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S11/12
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A distance judging system (S) includes at least two spaced apart marker devices (10) formed on a first object (12) and providing a signal (14). A viewer (A) is adapted to detect relative position of the signals (14) from the markers (10), and create an image (22) of the relative positions of the markers (10) within a field of view (16). A reticle (18) is superimposed on the field of view (16) of the viewer (A). The reticle (18) is selected to form a control area (20) within which simultaneous appearance of at least two images (22) of the markers (10) indicates that the first object (12) is at a distance (24) at least as great as a desired distance from the viewing apparatus (A); whereas, simultaneous appearance of less than two images (22) of the markers (10) within the control area (20) indicates that the first object (12) is at a distance (24) less than the desired distance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.