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US Patent 5781150 - GPS relative position detection system
US Patent Issued on July 14, 1998
Estimated Patent Expiration Date:
October 13, 2015Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
Estimated Patent Expiration Date:
October 13, 2015Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.AbstractA system of GPS devices which receive civilian GPS signals and provide an intuitive graphical interface for displaying the relative position of GPS devices in relation to each other, the relative position being accurate to several meters and defined as the distance to, direction of and height variance between GPS devices. A first GPS device with the person or object to be located transmits its GPS determined location to a second GPS device. This second GPS device includes a means for receiving the GPS determined position of the first GPS device, and also includes means for calculating the relative position of the first GPS device relative to the second GPS device based on a comparison of the received telemetry of the first GPS device and its own GPS determined position. The relative position of the first device is then graphically displayed on an interface of the second GPS device in a manner which eliminates the need for a map in order to travel to the location of the first GPS device. While providing an interface which displays a relative position of the first GPS device, this information remains accurate no matter how the orientation of the second GPS device changes with respect to a compass.Other References
| InventorAssigneeApplicationNo. 542799 filed on 10/13/1995US Classes:342/357.08, Determining relative position (e.g., distance or direction)342/419PortableField of Search342/419, Portable455/12.1Space satelliteExaminersPrimary: Blum, Theodore M.Attorney, Agent or FirmUS Patent References3063048, 4021807, Beacon tracking systemIssued on: 05/03/1977 Inventor: Culpepper , et al.4593273, Out-of-range personnel monitor and alarm Issued on: 06/03/1986 Inventor: Narcisse4675656, Out-of-range personnel monitor and alarm Issued on: 06/23/1987 Inventor: Narcisse5021794, Personal emergency locator system Issued on: 06/04/1991 Inventor: Lawrence5119504, Position aided subscriber unit for a satellite cellular system Issued on: 06/02/1992 Inventor: Durboraw, III5146231, Electronic direction finder Issued on: 09/08/1992 Inventor: Ghaem, et al.5172110, Indicator apparatus for the recovery of skiers buried by avalanches Issued on: 12/15/1992 Inventor: Tiefengraber5245314, Location monitoring system Issued on: 09/14/1993 Inventor: Kah, Jr.5289195, Positioning and displaying system Issued on: 02/22/1994 Inventor: Inoue5307277, Location detecting apparatus Issued on: 04/26/1994 Inventor: Hirano5434789, GPS golf diagnostic system Issued on: 07/18/1995 Inventor: Fraker, et al.5506587, Position indicating system Issued on: 04/09/1996 Inventor: Lans5539398GPS-based traffic control preemption system Issued on: 07/23/1996 Inventor: Hall, et al. International ClassesH04B 007/185G01S 005/02 |
