Method for determining the position of an elevator car and a pul

Details Method for determining the position of an elevator car and a pul Method for determining the position of an elevator car and a pul

1988-05-26

1989-11-14

Shoop, Jr., William M.

Elevator, industrial lift truck, or stationary lift for vehicle

Stationary lift for roadway vehicle or required component...

Having specific drive means for support

73490, B66B 302

Patent

active

048800821

ABSTRACT:
The invention relates to a method and means for determining the position of an elevator car on the principle of floor selection by means of a pulse train, whereby the position of the elevator car is determined on the basis of a pulse count indicating the elevator's speed. The achieve a more reliable pulse count based floor selection system which is suited for use with any type of elevator, the pulses required for calculating the elevator position for floor selection are obtained from an acceleration sensor placed on the elevator car, the output signal of which is integrated so as to obtain a voltage representing the speed of the elevator car, said voltage being converted into a pulse train whose frequency is dependent on the speed of movement of the elevator car.

REFERENCES:
patent: 3773146 (1973-11-01), Dixon, Jr. et al.
patent: 4009766 (1977-03-01), Satoh
patent: 4128142 (1978-12-01), Satoh et al.
patent: 4149147 (1979-04-01), Griffiths et al.
patent: 4751984 (1988-06-01), Williams et al.
patent: 4789050 (1988-12-01), Evin

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