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Roll sensor system for a vehicle

  • US 20020165654A1
  • Filed: 05/13/2002
  • Published: 11/07/2002
  • Est. Priority Date: 03/26/2001
  • Status: Active Grant
First Claim
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1. A land vehicle roll sensor system for detecting a vehicle roll condition and for activating a safety system in response thereto, comprising:

  • an angular rate sensor sensitive around at least one roll axis of the vehicle, said angular rate sensor producing an angular rate output signal representative of an angular rate around said at least one roll axis;

    an integrator, including an input and an output, said integrator receiving said angular rate output signal at said integrator input and integrating said angular rate output over time to produce an integrated angle;

    a first incline sensor sensitive along at least one incline axis perpendicular to said at least one roll axis of the land vehicle, said at least one incline axis being one of the X-axis and the Y-axis of the land vehicle, said first incline sensor producing a first incline sensor output;

    a second incline sensor, said second incline sensor being sensitive to the Z-axis of the land vehicle, said second incline sensor producing a second incline sensor output;

    a processor connected to receive said integrated angle, said angular rate output signal, said first incline sensor output and said second incline sensor output and to calculate a current incline angle from said first and said second incline sensor outputs, said processor comparing said current incline angle with said integrated angle and adjusting said integrated angle to compensate for drift if the difference between said current incline angle and said integrated angle is greater than a predetermined amount, said processor additionally generating a safety system trigger signal if after the comparison, at least said integrated angle correlates to a desired safety system activation event; and

    at least one safety system deployment control unit operatively connected to receive said trigger signal from said processor and to activate the safety system based upon receipt of a trigger signal.

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