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:
Dec. 06, 2016
Filed:
Dec. 08, 2009
Alain Vissiere, Saint Georges d'Orques, FR;
Alain Vissiere, Saint Georges d'Orques, FR;
SYSNAV, Aubevoye, FR;
Abstract
A device for measuring the speed of movement of a wheeled terrestrial vehicle. A magnetometer takes measurements of an ambient terrestrial magnetic field and is positioned so as to be sensitive to the magnetic field variations caused by the rotation of at least one partially metallic wheel of the vehicle. The magnetometer delivers a corresponding signal. The signal is processed to establish a frequency spectrum thereof. From the frequency spectrum, a frequency of rotation of the wheel is determined, and deducing therefrom, on the basis of information representative of the radius of the wheel, the speed of movement of the vehicle.