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:
Apr. 12, 2016
Filed:
Sep. 27, 2012
Applicant:
Intelligent Imaging Systems Inc., Edmonton, CA;
Inventors:
Assignee:
Intelligent Imaging Systems, Inc., Edmonton, CA;
Primary Examiner:
Int. Cl.
CPC ...
G08G 1/01 (2006.01); G08G 1/042 (2006.01); G08G 1/017 (2006.01);
U.S. Cl.
CPC ...
G08G 1/042 (2013.01); G08G 1/017 (2013.01);
Abstract
Magnetometers under the road surface detect variations in the vertical and longitudinal horizontal components of the magnetic field over time in response to passing vehicles. A trajectory of these components in the phase space of these field components is regularized to obtain a magnetic signature. Magnetic signatures are compared using cross-correlation over arc length to identify vehicles. Inductance sensors can be used to detect vehicles and help determine the beginning and end of magnetic signatures.