Electricity: measuring and testing – Electrical speed measuring – Including speed-related frequency generator
Patent
1988-03-18
1989-06-06
Strecker, Gerald R.
Electricity: measuring and testing
Electrical speed measuring
Including speed-related frequency generator
324173, 324546, 340514, 364565, G01P 3488, G01P 2102, G01R 3106, B60T 832
Patent
active
048375080
ABSTRACT:
The device includes a comparator (4) fed by a quasi-sinusoidal signal (3) delivered by a variable reluctance sensor, for converting alternations of the signal into pulses acceptable by digital computing means. According to the invention, the device includes a selectively connectable feedback resistor (R5) for varying the threshold of the comparator in such a way as to check, at a given frequency of the signal, the correctness of the amplitude of the signal (3) provided by the sensor. The device may be used for the checking of the operational state of a variable reluctance sensor delivering a signal indicating the speed of rotation of a shaft fitted in a motor vehicle.
REFERENCES:
patent: 3676765 (1972-07-01), Westcott
patent: 3828198 (1974-08-01), Florus et al.
patent: 3976954 (1976-08-01), Sapir
patent: 4320662 (1982-03-01), Schaub et al.
patent: 4341995 (1982-07-01), Hennick
patent: 4575664 (1986-03-01), Johnson
Patent Abstracts of Japan, vol. 10, No. 149 (P-461)[2206] 30 May 1986, & JP-A-61 3067 (Hitachi Seisakusho K.K.) 09-01-1986.
Bendix France
Decker Ken C.
Palguta Larry J.
Strecker Gerald R.
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