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ADJUSTED NAVIGATION

  • US 20160245655A1
  • Filed: 10/17/2014
  • Published: 08/25/2016
  • Est. Priority Date: 10/18/2013
  • Status: Abandoned Application
First Claim
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1. A navigation device, comprising:

  • a navigation state estimation unit for repeatedly providing a navigation state estimate,a prediction unit for providing, using the navigation state estimate, a predicted magnetic property value,a storage unit for retrieving, using the navigation state estimate, a previously stored magnetic property value,a subtraction unit for producing the difference of the predicted magnetic property value and the retrieved magnetic property value,a filter unit for producing, using said difference, a navigation state correction value, anda correction unit for correcting, using said navigation state correction value, a corrected navigation state estimate,wherein the prediction unit comprises;

    a magnetic measuring unit for repeatedly providing a measured magnetic field strength value, andan integrating unit for integrating the measured magnetic field strength values to produce the magnetic property value corresponding with the navigation state estimate.

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