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Method for measuring instantaneous power generated by a leg extending force

  • US 5,401,224 A
  • Filed: 07/19/1993
  • Issued: 03/28/1995
  • Est. Priority Date: 03/30/1991
  • Status: Expired due to Fees
First Claim
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1. A method of measuring an instantaneous power generated by a leg extending force, comprising the steps of:

  • pushing against a foot plate, said pushing causing rotation of a rotary drive system comprising a powder brake, an intermediate shaft and a rope drum shaft;

    receiving a first pulse having a frequency which varies with the rotation of said rope drum shaft;

    receiving a second pulse having a frequency which varies with the rotation of said powder brake;

    calculating a maximum speed, Vmax, of said foot plate and an output time, τ

    max, of said maximum speed based on said first and second pulses;

    calculating a power produced by said leg extending force based upon an evaluation of kinetic energy imparted to said foot plate and said rotary drive system, a force exerted by said powder brake, said maximum speed Vmax of said foot plate and said output time τ

    max ; and

    outputting a result of said calculation of power.

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