US 12,480,767 B2
System and method for high accuracy pedestrian location determination and pedestrian navigation
Evgeny Klochikhin, Alexandria, VA (US); Paul Balzer, Freital (DE); Iuri Iatsinin, Tambov (RU); and Elena Urman, Damascus, MD (US)
Assigned to PARKOFON INC., Vienna, VA (US)
Filed by Parkofon Inc., Vienna, VA (US)
Filed on Nov. 3, 2023, as Appl. No. 18/386,841.
Prior Publication US 2025/0146825 A1, May 8, 2025
Int. Cl. G01C 21/20 (2006.01)
CPC G01C 21/206 (2013.01) 19 Claims
OG exemplary drawing
 
1. A location device comprising:
a processor; and
a memory device that stores a plurality of instructions, which when executed by the processor, causes the processor to be configured to:
configure an estimation filter having at least two modes, the at least two modes comprising a standing mode and a walking mode, to operate in the walking mode;
receive, global navigation satellite systems (GNSS) data and inertial sensor data, wherein the GNSS data and the inertial sensor data are associated with a pedestrian;
calculate, an acceleration related value of the pedestrian based on the inertial sensor data, wherein the acceleration related value is determined in part based on a plurality of gravitational amplitude data points determined from the inertial sensor data;
determine that the acceleration related value is below a standing activity threshold;
alter the estimation filter to operate in the standing mode based on the acceleration related value being below the standing activity threshold;
calculate, in the estimation filter operating in the standing mode, a position location of the pedestrian, wherein at least some of the GNSS data and the inertial sensor data is altered for the estimation filter to determine the position location of the pedestrian; and
transmit the position location of the pedestrian to a geomapping server enabling a pedestrian navigation system.