GNSS ultra-short baseline heading determination system and method
First Claim
1. A heading determination system comprising:
- an inertial measurement unit (IMU) adapted for detecting a magnitude and a direction of movement of the system about an axis of rotation and providing an output signal corresponding to said movement magnitude and direction;
at least two GNSS receivers each providing an output comprising GNSS ranging signals;
at least two GNSS antennas each attached to a respective GNSS receiver;
each GNSS antenna having a baseline separation from every other GNSS antenna that is no more than 0.5 meters;
a processor connected to said IMU and said receivers, wherein the processor receives output data from the IMU and GNSS receivers and uses said output data to calculate a heading of the heading determination system; and
said processor adapted for calculating the baseline separation between said at least two GNSS antennas in real time.
1 Assignment
0 Petitions
Accused Products
Abstract
A heading determination system comprises an inertial measurement unit (IMU) coupled with at least two GNSS receivers, each receiver paired with and receiving signals from a corresponding GNSS antenna, wherein the GNSS antennas are separated by an ultra-short baseline. The heading determination system receives signals broadcast by a plurality of GNSS satellites and calculates the phase difference in the signal seen among the separate GNSS antennas. Using this phase difference information, derived from comparing the signals received from a plurality of GNSS satellites, along with attitude data generated by the IMU, the heading determination system calculates a highly-accurate heading solution. A method is provided for determining a heading of a system including an IMU coupled with at least two GNSS receivers, with each receiver being paired with and receiving signals from a corresponding GNSS antenna and the antennas being separated by an ultra-short baseline.
25 Citations
1 Claim
-
1. A heading determination system comprising:
-
an inertial measurement unit (IMU) adapted for detecting a magnitude and a direction of movement of the system about an axis of rotation and providing an output signal corresponding to said movement magnitude and direction; at least two GNSS receivers each providing an output comprising GNSS ranging signals; at least two GNSS antennas each attached to a respective GNSS receiver; each GNSS antenna having a baseline separation from every other GNSS antenna that is no more than 0.5 meters; a processor connected to said IMU and said receivers, wherein the processor receives output data from the IMU and GNSS receivers and uses said output data to calculate a heading of the heading determination system; and said processor adapted for calculating the baseline separation between said at least two GNSS antennas in real time.
-
Specification
-
- Resources
-
Current AssigneeAppareo Systems LLC (AGCO Corporation)
-
Original AssigneeAppareo Systems LLC (AGCO Corporation)
-
InventorsZietz, John M., Allen, Robert M., Weinmann, Robert V.
-
Primary Examiner(s)LIU, HARRY K
-
Application NumberUS13/413,481Publication NumberTime in Patent Office476 DaysField of Search342/357.3US Class Current342/357.3CPC Class CodesA61B 2018/206 the laser light passing alo...G01C 21/165 combined with non-inertial ...G01S 19/35 Constructional details or h...G01S 19/55 Carrier phase ambiguity res...
