Apparatus and methods for determining loft time and speed

  • US 5,636,146 A
  • Filed: 11/21/1994
  • Issued: 06/03/1997
  • Est. Priority Date: 11/21/1994
  • Status: Expired due to Term
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First Claim
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1. Apparatus for determining the loft time of a moving vehicle off of a surface, comprising:

  • a loft sensor for sensing a first condition that is indicative of the vehicle leaving the surface, and a second condition indicative of the vehicle returning to the surface, the loft sensor comprising one or more accelerometers for generating a vibrational spectrum of the vehicle, and wherein the first and second conditions correspond to a change in the vibrational spectrum;

    a microprocessor subsystem for determining a loft time that is based upon the first and second conditions; and

    display means for displaying the loft time to a user of the apparatus.

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