Vehicle driving recorder, vehicle travel analyzer and storage medium

  • US 6,067,488 A
  • Filed: 12/02/1996
  • Issued: 05/23/2000
  • Est. Priority Date: 08/19/1996
  • Status: Expired due to Term
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First Claim
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1. A vehicle travel analyzer comprising:

  • measured data acquiring means for acquiring angular velocity data and acceleration data measured in time sequence relative to axes of a plurality of dimensions at a given position in a vehicle;

    measured data correcting means for removing a drift component contained in the acquired angular velocity data; and

    historical data producing means for deriving travel attitude angles of the vehicle from the angular velocity data without said drift component, deriving velocities of the vehicle along the axes of the dimensions from said travel attitude angles and said acquired acceleration data, and producing historical data of said derived travel attitude angles and velocities of the vehicle;

    wherein said measured data correcting means compares an angular component derived by periodically intergrating said acquired angular velocity data and an angular component derived from said acquired acceleration data in a stopped state of the vehicle so as to derive a rate of occurrence of drift contained in said angular velocity data, and wherein said measured data correcting means removes said drift component from said angular velocity data based on said drift occurrence rate.

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