Annular speed sensor with a tone ring having both axial and radi

Details Annular speed sensor with a tone ring having both axial and radi Annular speed sensor with a tone ring having both axial and radi

1997-06-13

1998-12-15

Snow, Walter E.

Electricity: measuring and testing

Electrical speed measuring

Including speed-related frequency generator

32420722, 32420712, 384448, G01P 3487, G01P 3488, F16C 3200, F16C 1900

Patent

active

058501410

ABSTRACT:
An annular wheel speed sensor having an efficient magnetic configuration to provide a high level of electrical output even at relatively low wheel speeds. The sensor comprises a magnetic tone ring having both axial and radial magnetic fields and a stator configured to read both the axial and radial magnetic fields as the tone ring rotates. The sensor is configured to minimize the effects of variation in the axial air gap between the tone ring and stator to provide an accurate and reliable wheel speed signal. The wheel speed sensor incorporates many of the bearing components to provide a compact and efficient hub and bearing assembly. Moreover, the construction of the hub and bearing of the invention provides a sealed environment for the speed sensor, isolating it from environmental factors.

REFERENCES:
patent: 3500091 (1970-03-01), Jones
patent: 3742243 (1973-06-01), Gamble
patent: 4259637 (1981-03-01), Bloomfield et al.
patent: 4646088 (1987-02-01), Inoue
patent: 4656377 (1987-04-01), Akiyama et al.
patent: 4948277 (1990-08-01), Alff
patent: 4968156 (1990-11-01), Hajzler
patent: 5004358 (1991-04-01), Varvello et al.
patent: 5200697 (1993-04-01), Adler et al.

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