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Vehicle navigation system

  • US 4,593,359 A
  • Filed: 06/24/1983
  • Issued: 06/03/1986
  • Est. Priority Date: 06/24/1983
  • Status: Expired due to Fees
First Claim
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1. A navigation system particularly useful for a vehicle including two relatively movable parts having individual and mutual magnetic-field disturbing characteristics inherent in its construction, comprising:

  • two magnetic-field sensors each mounted on one of said parts of the vehicle and outputting electrical signals corresponding to the measured azimuth of the two parts of the vehicle;

    an analog-to-digital converter for converting said output signals to digital values;

    and a microcomputer including a storage device having stored therein two look-up tables, each in the form of a matrix of correction factors for the various azimuth positions of each relatively movable part of the vehicle;

    input means for inputting the digital values corresponding to the measured azimuth of the two parts of the vehicle;

    computer means programmed to compute from the measured values and said stored look-up tables the true azimuth values; and

    output means for outputting said true azimuth values.

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