The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 12, 2013
Filed:
Jan. 28, 2010
Paul W. Mcburney, San Francisco, CA (US);
Eric Hirsch, Munich, DE;
Paul W. McBurney, San Francisco, CA (US);
Eric Hirsch, Munich, DE;
eRIDE, Inc., San Bruno, CA (US);
Abstract
A tightly coupled GPS and dead-reckoning system collects wheel speed transducer data over a vehicle's network to compute vehicle range and direction. The dead-reckoning bridges over gaps in navigation solutions that would otherwise occur when GPS signal transmission is lost in tunnels, parking garages, and other common situations. Continual calibration of the wheel radii and compensation for speed effects are calculated from GPS position fixes, and such improves the performance and accuracy of dead-reckoning during long outages of GPS signal reception. When the GPS signals are restored, the dead-reckoning solutions provide a high quality starting place for the GPS receiver to search around.