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System and method for detection of freefall with spin using two tri-axis accelerometers

  • US 20080236282A1
  • Filed: 03/28/2007
  • Published: 10/02/2008
  • Est. Priority Date: 03/28/2007
  • Status: Active Grant
First Claim
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1. A system for detecting freefall of an object comprising:

  • first and second tn-axis accelerometers A and B located a predetermined fixed distance R apart from each other, each of said accelerometers generating first, second and third acceleration vector signals indicative of a magnitude and direction of acceleration forces imparted thereto;

    a processor including a software module for processing said acceleration vector signals and determining therefrom whether said accelerometers are being exposed to centrifugal accelerations in a zero gravity condition resulting from a spin; and

    a signal generator for generating a control signal in response to determination by said processor that said accelerometers are undergoing freefall with spin in a common plane.

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