Situation awareness display device

• US 5,317,321 A
• Filed: 06/25/1993
• Issued: 05/31/1994
• Est. Priority Date: 06/25/1993
• Status: Expired due to Fees

• Current Assignee: The United States of America As Represented By The Secretary of Agriculture
• Original Assignee: The United States Of America As Represented By The Secretary Of The Army
• Inventors: Sass, Paul F.
• Primary Examiner(s): Hellner, Mark
• Application Number:
  US08/085,268
• Time in Patent Office: 340 Days
• Field of Search: 342/176, 342/357, 364/449, 364/460
• US Class Current: 342/176
• CPC Class Codes: G01S 13/86 Combinations of radar systems with non-radar systems, e.g. sonar, direction finder
• CPC Class Codes: G01S 19/42 Determining position

Abstract

A situation awareness display device for providing a graphical display of e relative position of remote units moving along with and in proximity to the local unit utilizing the device. The device is comprised of a tracking means for determining the instantaneous position of the local unit, a communications means for communicating that local position information to cooperating remote units over an external communication link, and receiving the position information of those remote unit over that same external link, a navigation means for deriving course following information, direction and velocity of said display device from said local unit position information, a main processing means for controlling the flow of information within said device and for deriving the relative position of the remote units with respect to the local unit from their respective position information, and a display means for retrieving and graphically displaying said stored relative position information in a uniquely configured display format showing the relative positions of the remote units from the perspective of the local unit.

Claims

1. A situation awareness display device, comprising:

tracking means for determining instantaneous position information of a local unit utilizing said display device, said position information repeatedly updated at preprogrammed time intervals;

navigation means for deriving direction and velocity of said device from said local unit position information of said tracking means, said navigation means computing progress toward a series of programmed waypoints;

programmable communication means for transmitting said local unit position information over an external radio to remote units having their own local situation awareness display device, said programmable communication means receiving the position information of said remote units over said external radio;

processing means for controlling the flow of information within said device, said processing means deriving the relative position of said remote units with respect to said local unit from said position information, and said processing means storing said relative position information for retrieval;

display means for retrieving and graphically displaying said stored relative position information, said graphical display showing the relative position of remote units in relation to and from the perspective of said local unit; and

control means for providing operator control over said display device.

2. The device of claim 1 wherein said tracking means derives said local unit position from triangulation of satellite signals.

3. The device of claim 2 wherein said tracking means comprises a Global Position Satellite (GPS) receiver, a DC power supply and an external GPS antenna.

4. The device of claim 1 wherein said navigation means comprises a navigation processor that derives local unit course following information from said position information determined by said tracking means.

5. The device of claim 1 wherein said programmable communication means comprises a programmable processor that controls the communications protocol over said external radio.

6. The device of claim 5 wherein said communications protocol includes activation control, information modulation, error detection and error correction of said external radio communications.

7. The device of claim 1 wherein said display means comprises a display processor and a graphic display panel.

8. The device of claim 7 wherein said display processor plots said local unit position at the center of center of said graphic display panel, and plots a graphical depiction of said remote units in locations relative to said local unit.

9. The device of claim 7 wherein said graphic display panel is a flat panel Liquid Crystal Display.

10. The device of claim 1 wherein said control means comprises a keyboard electrically connected to said main processor, said keyboard providing operator control of said device.

11. The device of claim 10 wherein said control means provides operator control of the update reporting interval over said external radio.