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Method of adjusting the zero-point of rate type sensor

  • US 4,470,124 A
  • Filed: 06/01/1982
  • Issued: 09/04/1984
  • Est. Priority Date: 06/01/1981
  • Status: Expired due to Term
First Claim
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1. A method of adjusting the zero-level of a rate sensor which comprises the steps of:

  • detecting a current state of an automotive vehicle, whether it is in a state of travel or standing still, in accordance with the output from travel distance sensing means which generates electric pulse signals for a given unit distance travelled by said vehicle;

    averaging the sampled outputs from said rate sensor installed upon said vehicle, during the period from immediately after the detection of a standing still state thereof to the moment right before a starting of travel thereof;

    determining the thus-obtained averaged value as a current drifting value of said sensor; and

    subtracting the thus-determined drifting value from a current angle of deviation value as obtained in a turning motion during the normal travelling operation of said vehicle;

    whereby a proper detection of a current drift value of said rate sensor is ensured, free from any disturbances, and high accuracy in the zero-level adjustment of said rate sensor is ensured in accordance with the thus-obtained proper value of drifting.

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