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Automotive data recorder

  • US 5,948,026 A
  • Filed: 10/24/1996
  • Issued: 09/07/1999
  • Est. Priority Date: 10/24/1996
  • Status: Expired due to Term
First Claim
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1. A multi-state automotive vehicle data storage and analysis method, comprising the steps of:

  • in a first state, (a) periodically sampling input ;

    signal values indicating vehicle operating parameter values, (b) storing the sampled values in a temporary storage device, (c) determining a current vehicle operating condition, (d) comparing the current vehicle operating condition to a threshold operating condition, and (e) suspending operation in the first state by activating a second state when the current vehicle operating condition exceeds the threshold operating condition;

    in the second state, (f) detecting occurrence of a predetermined confirmation condition, (g) suspending operation in the second state by activating a third state upon detecting occurrence of the predetermined confirmation condition; and

    in the third state, transferring the stored values from the temporary storage device to a permanent storage device.

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