NAVIGATION SYSTEM AND METHOD
First Claim
Patent Images
1. A vehicle navigation system, comprising:
- at least two vehicle mounted radio frequency transceivers spaced apart from one another on a vehicle;
a plurality of reference devices to place at a plurality of fixed terrestrial reference locations, to define a circumference of a navigation area, wherein each reference device includes a fixed radio frequency transceiver to interact with the vehicle mounted radio frequency transceivers and with the other reference devices of the plurality of reference devices; and
a calibration system located on the plurality of reference devices, wherein a location error between the plurality of reference devices is tracked and used to calibrate actual locations of the plurality of reference devices and the at least two vehicle mounted radio frequency transceivers within the navigation area.
1 Assignment
0 Petitions
Accused Products
Abstract
A navigation system and associate methods are described that include a plurality of fixed terrestrial based reference devices that calibrate the system by tracking positional error between the fixed terrestrial based reference devices. A navigation system and associated methods are also described that include a laser positioning system. A navigation system and associated methods are described that include an RF positioning system. In one example, the laser positioning system, and the RF positioning system cross check one another to ensure reliability and accuracy of a position measurement.
-
Citations
13 Claims
-
1. A vehicle navigation system, comprising:
-
at least two vehicle mounted radio frequency transceivers spaced apart from one another on a vehicle; a plurality of reference devices to place at a plurality of fixed terrestrial reference locations, to define a circumference of a navigation area, wherein each reference device includes a fixed radio frequency transceiver to interact with the vehicle mounted radio frequency transceivers and with the other reference devices of the plurality of reference devices; and a calibration system located on the plurality of reference devices, wherein a location error between the plurality of reference devices is tracked and used to calibrate actual locations of the plurality of reference devices and the at least two vehicle mounted radio frequency transceivers within the navigation area. - View Dependent Claims (2, 3, 4)
-
-
5. A vehicle navigation system, comprising:
-
at least two vehicle mounted radio frequency transceivers spaced apart from one another on a vehicle, each transceiver including a local clock and time of flight calculation circuitry; a plurality of reference devices to place at a plurality of fixed terrestrial reference locations, to define a circumference of a navigation area, wherein each reference device includes a fixed radio frequency transceiver to interact with the vehicle mounted radio frequency transceivers and with the other reference devices of the plurality of reference devices; and a calibration system located on the plurality of reference devices, wherein a location error between the plurality of reference devices is tracked and used to calibrate actual locations of the plurality of reference devices and the at least two vehicle mounted radio frequency transceivers within the navigation area. - View Dependent Claims (6, 7, 8)
-
-
9. A vehicle navigation system, comprising:
-
at least two vehicle mounted radio frequency transceivers operating at approximately 150 MHz, and spaced apart from one another on a vehicle; a plurality of reference devices to place at a plurality of fixed terrestrial reference locations, to define a circumference of a navigation area, wherein each reference device includes a fixed radio frequency transceiver to interact with the vehicle mounted radio frequency transceivers and with the other reference devices of the plurality of reference devices; and a calibration system located on the plurality of reference devices, wherein a location error between the plurality of reference devices is tracked and used to calibrate actual locations of the plurality of reference devices and the at least two vehicle mounted radio frequency transceivers within the navigation area. - View Dependent Claims (10, 11, 12, 13)
-
Specification