Magnetic sensor for detecting position and/or speed of a...

Details Magnetic sensor for detecting position and/or speed of a... Magnetic sensor for detecting position and/or speed of a...

2006-04-11

2006-04-11

Patidar, Jay (Department: 2862)

Electricity: measuring and testing

Magnetic

Displacement

C324S207250, C324S174000

Reexamination Certificate

active

07026809

ABSTRACT:
The invention relates to a position and/or speed sensor including a mobile target (2) with at least one tooth, a first permanent magnet (5), at least one second permanent magnet (11), and a probe (4) sensitive to the direction and intensity of a magnetic induction, and placed along an axis OZ such that when there is no adjacent tooth, the magnetic induction created by the first magnet passes through the probe along a direction opposite to the direction of magnetization. Magnetic inductions created by the permanent magnets (5, 11) have approximately equal values but in opposite directions, and in the presence of an adjacent tooth, the absolute value of the variation of the magnetic induction detected by the probe (4) is greater than a trip threshold.

REFERENCES:
patent: 4066962 (1978-01-01), Jaffe
patent: 4293837 (1981-10-01), Jaffe et al.
patent: 4401944 (1983-08-01), Narimatsu et al.
patent: 5781005 (1998-07-01), Vig et al.
patent: 5814985 (1998-09-01), Oudet
patent: 19803018 (1998-09-01), None

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