Apparatus for measuring the speed of an object with circuit for

Details Apparatus for measuring the speed of an object with circuit for Apparatus for measuring the speed of an object with circuit for

1988-02-17

1990-02-20

Strecker, Gerard R.

Electricity: measuring and testing

Electrical speed measuring

Including speed-related frequency generator

324166, 32420725, 341155, 307261, 328 13, G01P 348, G01P 354, H03K 500, H03B 1900

Patent

active

049029703

ABSTRACT:
The circuit comprises a comparator 1 fed by a quasi-sinusoidal signal delivered by a source 2 for converting the positive alternations of the signal into pulses acceptable by digital computing means. According to the invention, the circuit comprises a current source 7 selectively connectible to the circuit in order to vary its sensitivity and to thus enable an evaluation of the amplitude of the signal delivered by the source 2. Application to the diagnosis of the operating state of a variable reluctance sensor delivering a quasi-sinusoidal signal representing the speed of rotation of a shaft fitted in a motor vehicle.

REFERENCES:
patent: 3763436 (1973-10-01), Haw
patent: 3801830 (1974-04-01), Boyer
patent: 3882474 (1975-05-01), Cain
patent: 4001604 (1977-01-01), Parks et al.
patent: 4074325 (1978-02-01), Sakai et al.
patent: 4575664 (1986-03-01), Johnson

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