Differential Hall-effect gear measure feeler

Details Differential Hall-effect gear measure feeler Differential Hall-effect gear measure feeler

1984-12-11

1987-10-27

Eisenzopf, Reinhard J.

Electricity: measuring and testing

Magnetic

Displacement

33558, 307309, G01B 714, H03K 1790, H03K 1918

Patent

active

047032618

ABSTRACT:
The measuring system of the gear measuring feeler contains, as a Hall-effect sensor, two Hall-effect sensor elements which are arranged in opposing relationship to each other in the magnetic field. The differential output signal of this dual Hall-effect sensor is processed in a matching circuit which is designed as a differential amplifier circuit, to yield a measuring voltage with respect to zero volt. This measuring voltage is twice as high as in the case where only one Hall-effect sensor element is used as the Hall-effect sensor. Furthermore, the matching circuit is of a simpler structure and the measurement is substantially more precise since there is not required any reference voltage source in the matching circuit.

REFERENCES:
patent: 3331971 (1967-07-01), Moller
patent: 3622898 (1971-11-01), Salmon
patent: 4528758 (1985-07-01), Berchtold

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