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Navigation method for vehicles

  • US 4,814,989 A
  • Filed: 01/30/1987
  • Issued: 03/21/1989
  • Est. Priority Date: 05/30/1985
  • Status: Expired due to Fees
First Claim
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1. Navigation method for vehicles equipped with a composite navigation system which includes a display device for representing a plurality of trip destinations in terms of direction and distance, an input device and a memory, the method comprising the steps of:

  • placing destination data into the memory via the input device before the trip is started;

    continuously determining the instantaneous location of the vehicle during the trip by means of the composite navigation system and displaying said instantaneous location relative to a selected trip destination;

    detecting the deviation (angle and distance) of each instantaneous location determined by the composite navigation system from said selected trip destination upon reaching the actual trip destination;

    weighting the detected deviation with factors (K1<

    1;

    K2<

    1), respectively, to form a weighted deviation;

    computing correction values (F1, F2) with the composite navigation system utilizing the weighted deviation;

    storing the computed correction values (F1, F2);

    correcting subsequent data detected by the composite navigation system indicative of the actual position of the vehicle with said correction values (F1, F2); and

    ,increasing at least on of the weighting factors (K1, K2) by a predetermined percentage of the associated detected deviation after each further trip to a new selected trip destination when a new deviation occurs.

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