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:
Jun. 28, 2016
Filed:
Jan. 24, 2012
Applicant:
Jan F. Herbst, Grosse Pointe Woods, MI (US);
Inventor:
Jan F. Herbst, Grosse Pointe Woods, MI (US);
Assignee:
GM GLOBAL TECHNOLOGY OPERATIONS LLC, Detroit, MI (US);
Primary Examiner:
Int. Cl.
CPC ...
G01B 7/30 (2006.01); G01B 7/14 (2006.01); G01D 5/20 (2006.01); G01P 3/488 (2006.01);
U.S. Cl.
CPC ...
G01D 5/202 (2013.01); G01P 3/488 (2013.01);
Abstract
A sensor includes a magnetic piece with a magnetic array, a conductive coil and ferromagnetic object. The magnetic array provides a spatially modulated magnetic field that is concentrated in the near-field. A processor calculates the ferromagnetic object's speed based on voltage induced in the conductive coil. The ferromagnetic object's movement through the magnetic field causes a change in the magnetic flux, and the rate of change is proportional to the induced voltage.