DETERMINATION OF THE NUMBER OF PERSONS ENTERING AND LEAVING AN ELEVATOR CAR

摘要

The present invention provides a method for determining the number of passenger transfers in an elevator car monitored by an elevator and group control systems under the supervision of a group control. The method comprises continuously measuring a car load during a stoppage for obtaining a load data signal. The load data signal is filtered, recorded and the number of load changes taking place is determined therefrom, so that the number of persons having entered and having left the elevator car is calculated. The car load data measured with an analogous weighting device is converted into a digital car load signal which may be digitally filtered. The data obtained with this method may be verified with the elevator status data collected by the elevator control system (e.g. with photocells, load devices, car calls and direction data). The present invention also provides an apparatus for determining the number of passenger transfers. The apparatus comprises: a weighing device for continuously measuring the car load during a stoppage; an A/D converter for converting the load data signal into a digital load data signal; and a recording and calculation unit. A verification unit can be additionally arranged in the group control system. The recording and calculation unit and said A/D converter may be placed in an elevator control system panel and connected to the serial bus between the elevator control and group systems.