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System and method for detecting the walk of a person

  • US 9,265,448 B2
  • Filed: 02/25/2010
  • Issued: 02/23/2016
  • Est. Priority Date: 02/26/2009
  • Status: Active Grant
First Claim
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1. A system for detecting the walk of a person, the system including a housing comprising at least a biaxial movement sensor, said housing configured to attach to an upper portion of the body of said person, so that a first measurement axis of said sensor provides measurements representative of an anteroposterior axis or a vertical axis of said body and so that a second measurement axis of said sensor provides measurements representative of a mediolateral axis of said body, said system further comprising a processor configured to analyze the measurements delivered by said sensor by performing steps comprising:

  • processing over a time window the measurement signals delivered by said sensor to search for a dominant frequency in said signals, anddetecting walking of the person as occurring when a ratio between the dominant frequency of the signal of the first measurement axis and the dominant frequency of the second measurement axis, or between the dominant frequency of a norm of the vector of measurements transmitted by said sensor and the dominant frequency of the signal of the second measurement axis, is substantially equal to two.

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