Rotating speed measuring apparatus having a corrector for low an

Details Rotating speed measuring apparatus having a corrector for low an Rotating speed measuring apparatus having a corrector for low an

1987-02-11

1989-02-28

Eisenzopf, Reinhard J.

Electricity: measuring and testing

Electrical speed measuring

Including speed analog electrical signal generator

324166, 324161, G01P 344, G01P 356

Patent

active

048089338

ABSTRACT:
A signal whose frequency is proportional to a rotational speed of a rotor and whose rising and falling angles near points crossing zero becomes larger with the rotational speed of the rotor is used to produce a first signal of amplitude corresponding to the rising and falling angles and a second signal of amplitude corresponding to the frequency, a difference between the first and second signals is evaluated, and the first or second signals are corrected with the difference.

REFERENCES:
patent: 3919634 (1975-11-01), Appel et al.
patent: 3934200 (1976-01-01), Schoonover et al.
patent: 4246536 (1981-01-01), Bradley et al.
patent: 4560927 (1985-12-01), Ishida et al.
patent: 4575677 (1986-03-01), Dennis

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