18205480. REAL TIME DETERMINATION OF PEDESTRIAN DIRECTION OF TRAVEL simplified abstract (Apple Inc.)

From WikiPatents
Jump to navigation Jump to search

REAL TIME DETERMINATION OF PEDESTRIAN DIRECTION OF TRAVEL

Organization Name

Apple Inc.

Inventor(s)

Mark P. Sena of Larkspur CA (US)

Jaehyun Bae of San Carlos CA (US)

REAL TIME DETERMINATION OF PEDESTRIAN DIRECTION OF TRAVEL - A simplified explanation of the abstract

This abstract first appeared for US patent application 18205480 titled 'REAL TIME DETERMINATION OF PEDESTRIAN DIRECTION OF TRAVEL

Simplified Explanation

The patent application describes a method for estimating the Direction of Travel (DoT) in real time using inertial acceleration data from a motion sensor in a mobile device worn or held by a user.

  • The method involves obtaining the acceleration data and computing its frequency spectrum to generate horizontal and vertical frequency components at the user's step frequency.
  • An acceleration trajectory is then constructed using the horizontal frequency components in a horizontal reference frame, forming an ellipse.
  • The maximum radius vector of the ellipse is determined, and an angle to the DoT is calculated based on this maximum radius vector.
  • The sign of the angle is disambiguated, and the disambiguated angle is determined as the DoT.

Potential applications of this technology:

  • Navigation systems: The real-time estimation of DoT can be used to enhance navigation systems in mobile devices, providing more accurate and reliable directions to users.
  • Fitness tracking: The method can be utilized in fitness tracking applications to monitor the user's movement and provide feedback on their exercise routines.
  • Augmented reality: By accurately estimating the DoT, augmented reality applications can provide more immersive and realistic experiences, aligning virtual objects with the user's real-world movement.

Problems solved by this technology:

  • Accurate DoT estimation: The method provides a reliable way to estimate the user's DoT in real time, overcoming challenges such as sensor noise and user movement variability.
  • Sign ambiguity: The disambiguation of the angle sign ensures that the estimated DoT is accurate and consistent, eliminating any potential confusion or errors in navigation or tracking applications.

Benefits of this technology:

  • Real-time estimation: The method allows for the estimation of DoT in real time, providing immediate feedback and enhancing user experiences.
  • Improved accuracy: By considering the frequency components and constructing an acceleration trajectory, the method improves the accuracy of DoT estimation compared to traditional methods.
  • User-friendly: The use of a mobile device's motion sensor makes the method easily accessible and user-friendly, requiring minimal additional hardware or setup.


Original Abstract Submitted

Embodiments are disclosed for real time estimation of DoT. In some embodiments, a method comprises: obtaining inertial acceleration data from a motion sensor of a mobile device worn or held by a user; computing a frequency spectrum of the acceleration data to generate horizontal and vertical frequency components at a step frequency of the user; constructing an acceleration trajectory of the horizontal frequency components in a horizontal reference frame, the horizontal frequency components forming an ellipse in the horizontal reference frame; determining a maximum radius vector of the ellipse; determining an angle to DoT based on the maximum radius vector; disambiguating a sign of the angle; and determining the disambiguated angle as the DoT.

Retrieved from "http://wikipatents.org/index.php?title=18205480._REAL_TIME_DETERMINATION_OF_PEDESTRIAN_DIRECTION_OF_TRAVEL_simplified_abstract_(Apple_Inc.)&oldid=15935"