Floor selector for lift
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United States of America Patent
Stats
-
Jan 13, 1987
Grant Date -
N/A
app pub date -
Mar 11, 1985
filing date -
Dec 20, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A pulse floor selector for a lift, with a floor and location determining system based on counting pulses indicating the lift's velocity, with the aid of electronics thereto appropriate. Dense pulse floor selection is used for determining the lift's location, in particular in modern high speed lifts. To serve as pulse former, generally a pulse transmitter (PA) mechanically coupled with the motor is required, which supplies a number of pulses (PT) proportional to the distance traversed. The present invention represents a different approach wherein the requisite pulses are formed without transmitter. In the means of the invention, there has been connected to the tachometer generator (TG) giving the velocity of the lift, an analog/digital converter (A/D) which delivers to the electronics taking care of floor and location determination, a pulse train (PT) of which the frequency is proportional to the lift's velocity, whereby the total number of pulses per time unit is thus proportional to the distance travelled. In this manner, the pulse transmitter system (PP,PT) can be simply replaced by an IC circuit (A/D).
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