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. 21, 2021
Filed:
Mar. 12, 2020
Applicant:
Ntn-snr Roulements, Annecy, FR;
Inventors:
Assignee:
NTN-SNR Roulements, Annecy, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01D 5/14 (2006.01); G01D 5/16 (2006.01);
U.S. Cl.
CPC ...
G01D 5/142 (2013.01); G01D 5/16 (2013.01);
Abstract
The invention relates to a system comprising a coder that has an alternation of North and South magnetic poles separated by transitions extending along an helix of pitch p and of angle α. The invention having Npairs of North and South poles and a polar width Lmeasured along a normal (N) to the transitions which are: N=πa/I and L=p.cos α. The invention also includes a sensor able to detect the period magnetic field emitted by the coder by means of at least two sensitive magnetic elements which are disposed at a radial reading distance from the magnetic track. The sensitive elements are disposed in relation to one another to deliver signals in quadrature.