Device for detecting the speed and direction of a movable compon

Details Device for detecting the speed and direction of a movable compon Device for detecting the speed and direction of a movable compon

1993-10-20

1996-03-19

Snow, Walter E.

Electricity: measuring and testing

Electrical speed measuring

Including speed analog electrical signal generator

3242072, 340672, G01P 352, G01P 1300, G01B 714, G08B 2100

Patent

active

055005853

ABSTRACT:
A device for detecting the movement of a movable component in that the position signals furnished by two position sensors are added to a signal that is conducted through a signal line to an evaluation arrangement. The position ranges associated with the position sensors have an overlapping region. From the position signals, a signal processing arrangement determines a direction signal and a speed signal. Two current sources are actuated by the direction signal and the speed signal to impress predetermined currents in the signal line. The currents are added in the signal line. In a first embodiment, a signal transmitted over the signal line has four different levels. In another embodiment, the signal transmitted over the signal line has three different levels. The device according to the present invention is particularly suitable for use in an adjustment drive provided in a motor vehicle.

REFERENCES:
patent: 3728565 (1973-04-01), O'Callaghan
patent: 4629982 (1986-12-01), Kieslich
patent: 4785242 (1988-11-01), Vaidya et al.
Philips Semiconductors, "KMI 10/1 Integrated Rotational Speed Sensor", Philips, SC 17, Sep. 1992, pp. 2-12.
U. Tietze et at, "Halbleiterschaltungstechnik" (Semiconductor Circuit Technology), Springer Verlang, 5th Edition, 1980, pp. 54 and 112.
Tietze et al., "Halbleiter-Schaltungstechnik Funfte, uberarbeitete Auflage" Springer-Verlag, (1980), pp. 54 and 112. (no translation).

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