Method and apparatus for measuring the amount of exercise

  • US 5,033,013 A
  • Filed: 05/14/1990
  • Issued: 07/16/1991
  • Est. Priority Date: 04/22/1985
  • Status: Expired due to Fees
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First Claim
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1. An apparatus for measuring a walking speed of a walker, comprising:

  • a detector detecting impacts made by contacts of a foot of the walker with the ground to produce corresponding contact signals;

    processing means for processing the contact signals from the detector, the processing means counting the number of the contact signals in a predetermined unit of time to obtain a pitch in said unit of time, calculating the stride of the walker from the obtained pitch and the height of the walker according to a predetermined empirical relationship, said height being inputted to the processing means beforehand, and multiplying the stride by the pitch to obtain a walking speed of the walker in said unit of time; and

    a display which displays the speed of the walker, wherein said empirical relationship is represented by the following equations;

    
    
    space="preserve" listing-type="equation">ST=(0.1688×

    HT)/(1-0.0174×

    PI×

    HT), whereST is the stride in meters,PI is the pitch in number of steps every 10 seconds, andHT is the walker'"'"'s height in meters,wherein said detector worn by the walker comprises a pendulum that swings due to an impact produced by contacting of a foot of the walker with the ground, a metallic ratchet gear rotated by said swinging of the pendulum, and magnet sensor means for sensing a motion of a serrated edge of the ratchet gear.

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