Rotational speed detection unit

Details Rotational speed detection unit Rotational speed detection unit

1995-11-13

1997-09-02

Williams, Hezron E.

Electricity: measuring and testing

Electrical speed measuring

Including speed-related frequency generator

32420713, 32420725, G01B 714, G01P 3488

Patent

active

056636415

ABSTRACT:
A rotational speed detection unit has a rotating tone wheel, a pole piece and a stationary sensor comprising a magnetic wire of the Wiegand wire or amorphous magnetostriction wire and a coil such that the tone wheel has an outer periphery with the alternative N and S poles with a uniform pitch, that one end of the sensor is connected to one end of the pole piece, and that as the tone wheel rotates, the other end of the sensor and the other end of the pole piece are magnetically connected to the N and S poles of the tone wheel, respectively, and vice versa.

REFERENCES:
patent: 4369405 (1983-01-01), Sato et al.
patent: 4700133 (1987-10-01), Day
patent: 4746862 (1988-05-01), Ueki
patent: 5003259 (1991-03-01), Palazzetti et al.
patent: 5023547 (1991-06-01), Pawlak et al.
patent: 5057727 (1991-10-01), Jones
patent: 5239263 (1993-08-01), Iwata et al.
patent: 5289120 (1994-02-01), Moretti et al.

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