Speed signal generating circuit system

Details Speed signal generating circuit system Speed signal generating circuit system

1986-11-17

1988-11-15

Pellinen, A. D.

Electricity: measuring and testing

Electrical speed measuring

Including speed-related frequency generator

180197, 361238, G01P 348

Patent

active

047852380

ABSTRACT:
To provide an unambiguously representative signal responsive to the speed of a vehicle wheel, an inductive pick-up (1a. . . . 1n) is coupled to a suitable star wheel or the like of each one of the wheels, the pick-ups then providing their signals to amplifiers (3a. . . . . 3n) having hysteresis characteristics. At low speeds, an offset signal is superimposed on the voltage from the inductive pick-ups so that the amplifiers respond and provide output signals only at higher amplitudes of the pick-up signals, thereby eliminating inaccuracies or disturbances occurring in the sensor which might simulate changes in speed of the respective wheel.

REFERENCES:
patent: 4432430 (1984-02-01), Lind et al.
patent: 4583611 (1986-04-01), Frank et al.

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