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Step detection methods and apparatus

  • US 10,724,864 B2
  • Filed: 06/17/2014
  • Issued: 07/28/2020
  • Est. Priority Date: 06/17/2014
  • Status: Active Grant
First Claim
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1. A footstep detection method comprising:

  • using an accelerometer sensor, generating accelerometer data regarding movements of a user device;

    using a filter, filtering the accelerometer data to remove frequencies above a typical stepping frequency range of a user;

    using processing circuitry, analyzing an individual one of a plurality of cycles of the accelerometer data to determine whether the one cycle corresponds to the user taking a footstep with the user device after the filtering;

    using the processing circuitry, determining that the one cycle corresponds to the user taking the footstep as a result of the analyzing; and

    wherein the determining comprises;

    determining the one cycle as corresponding to the user taking the footstep as a result of the accelerometer data of the one cycle decreasing while first crossing a low threshold and increasing while second crossing a high threshold, and the first and second crossings occur within a cutoff period of time;

    ordetermining the one cycle as corresponding to the user taking the footstep as a result of the accelerometer data of the one cycle decreasing while third crossing the high threshold and increasing while fourth crossing the low threshold, and the third and fourth crossings occur within the cutoff period of time.

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