Non-oriented direct coupled gear tooth sensor using a Hall cell

Details Non-oriented direct coupled gear tooth sensor using a Hall cell Non-oriented direct coupled gear tooth sensor using a Hall cell

1986-11-25

1988-05-17

Strecker, Gerard R.

Electricity: measuring and testing

Magnetic

Displacement

324174, 324235, 324251, G01B 730, G01P 34, G01R 3306

Patent

active

047453630

ABSTRACT:
A non-oriented direct coupled sensor for gear teeth or similarly shaped discontinuities of a ferrous magnetic or magnetic target uses a single magnet and a direct coupled Hall cell integrated circuit to detect the presence or absence of gear teeth. The sensor incorporates techniques for flux steering and flux reversals independent of the orientation of the sensor to the target to overcome the operate or release point of a Hall switch, latch or other device. The use of spaced apart, offset flux concentrators provides a sensitive device with favorable tolerances in temperature and air gap.

REFERENCES:
patent: 3579099 (1971-05-01), Kanbayashi
patent: 3885212 (1975-05-01), Herbert
patent: 4086533 (1978-04-01), Ricouard et al.
patent: 4207519 (1980-06-01), Zatsepin et al.
patent: 4293814 (1981-10-01), Boyer
patent: 4481469 (1984-11-01), Hauler et al.
patent: 4518918 (1985-05-01), Avery
patent: 4524932 (1985-06-01), Bodziak
patent: 4587509 (1986-05-01), Pitt et al.

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