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METHOD AND APPARATUS FOR 3-D ACCELEROMTER BASED SLOPE DETERMINATION, REAL-TIME VEHICLE MASS DETERMINATION, AND VEHICLE EFFICIENCY ANALYSIS

  • US 20130184964A1
  • Filed: 12/21/2012
  • Published: 07/18/2013
  • Est. Priority Date: 12/23/2011
  • Status: Active Grant
First Claim
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1. A method of evaluating driver performance using a road surface slope metric derived from data that includes 3-D accelerometer data, comprising the steps of:

  • (a) while the driver is operating the vehicle, automatically collecting vehicle data, the vehicle data including;

    (i) 3-D accelerometer data;

    (ii) vehicle speed data;

    (iii) torque data; and

    (iv) engine speed data;

    (b) using a first computing device to derive the road surface slope metric using vehicle position data;

    (c) using the first computing device to determine a mass of the vehicle at a specific point in time, based on the road surface slope metric, vehicle speed data, torque data, and engine speed data corresponding to that point in time; and

    (d) using a second computing device to evaluate driver performance using a plurality of factors, at least one of which is derived from the slope determined mass of the vehicle.

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