Method and system for determining relative displacement and heading for navigation

• US 8,954,271 B2
• Filed: 11/08/2010
• Issued: 02/10/2015
• Est. Priority Date: 11/06/2009
• Status: Active Grant

• Current Assignee: University of Maryland, College Park
• Original Assignee: University of Maryland, College Park
• Inventors: Sheikh, Suneel Ismail, Pines, Darryll J., Conroy, Joseph Kim, Spiridonov, Timofey N.
• Primary Examiner(s): Tarcza, Thomas
• Assistant Examiner(s): Dunn, Alex C
• Application Number:
  US13/508,070
• Publication Number:
  US 20130040656A1
• Time in Patent Office: 1,555 Days
• Field of Search: 701/494
• US Class Current: 701/494
• CPC Class Codes: G01C 22/006 Pedometers
• CPC Class Codes: G01S 5/0284 Relative positioning
• CPC Class Codes: G01S 5/0294 Trajectory determination or predictive filtering, e.g. target tracking or Kalman filtering

Abstract

A system and method for determining a location of a mobile object is provided. The system determines the location of the mobile object by determining distances between a plurality of sensors provided on a first and second movable parts of the mobile object. A stride length, heading, and separation distance between the first and second movable parts are computed based on the determined distances and the location of the mobile object is determined based on the computed stride length, heading, and separation distance.

Claims

1. A system for determining a location of a mobile object including at least a first and second movable part, the system comprising:

a central node;

a controller coupled to the mobile object; and

a plurality of sensors provided on each of the first and second movable parts,

wherein;

the controller is configured to determine distances between the plurality of sensors, and is further configured to determine a stride length, a heading, and a separation distance between the first and second movable parts using the determined distances, and

the central node is configured to determine a location of the mobile object based on the determined stride length, heading, and separation distance.

4. The system of claim 1, wherein at least one of the stride length, heading, and separation distance is computed using a distance between sensors on the first movable part or the second movable part.

2. A method for determining a location of a mobile object including at least a first and second movable part, the method comprising:

determining distances between a plurality of sensors provided on the first and second movable parts;

computing a stride length, heading, and separation distance between the first and second movable parts based on the determined distances; and

computing a location of the mobile object based on the computed stride length, heading, and separation distance.

5. The method of claim 2, wherein at least one of the stride length, heading, and separation distance is computed using a distance between sensors on the first movable part or the second movable part.

3. A computer readable storage medium embodied with program code for enabling a computer to perform a method of determining a location of a mobile object including at least a first and second movable part, the method comprising:

determining distances between a plurality of sensors provided on the first and second movable parts;

computing a stride length, heading, and separation distance between the first and second movable parts based on the determined distances; and

computing a location of the mobile object based on the computed stride length, heading, and separation distance.

6. The computer readable storage medium of claim 3, wherein at least one of the stride length, heading, and separation distance is computed using a distance between sensors on the first movable part or the second movable part.