Method and apparatus for the control of elevator cars from a mai

Details Method and apparatus for the control of elevator cars from a mai Method and apparatus for the control of elevator cars from a mai

1988-12-20

1990-05-22

Leung, Philip H.

Elevator, industrial lift truck, or stationary lift for vehicle

Stationary lift for roadway vehicle or required component...

Having specific drive means for support

187101, B66B 120

Patent

active

049269763

ABSTRACT:
A method and apparatus for the control of the dispatch of elevator cars from the main floor during up peak traffic conditions are implemented in an algorithm performed by a process computer. The algorithm for an elevator group, consisting of at least one elevator, calculates a transport capacity and a nominal time interval. The transport capacity and the nominal time interval are dependent on the nominal departure load and the compound values are stored in a transport capacity field and in an interval field, respectively. From data generated by a sensor, an elevator control and an input/output unit, the algorithm determines the traffic requirement at the main floor and the traffic requirement at an associated car, and the transport capacity is computed dependant on the higher of the two traffic requirements. Subsequently, the algorithm searches in the transport capacity field for the nominal departure load corresponding to this transport capacity. In a similar manner, the field component of the interval field, indexed with the nominal departure load, is addressed and the value of the field component assigned to the nominal time interval. As soon as the condition actual departure load equals nominal departure load or the condition actual time interval equals nominal time interval is satisfied, the associated car is dispatched.

REFERENCES:
patent: 2854096 (1958-09-01), White et al.
patent: 2938604 (1960-05-01), O'Grady et al.
patent: 4058187 (1977-11-01), Jacoby et al.
patent: 4305479 (1981-12-01), Bittar et al.
patent: 4838384 (1989-06-01), Thangavelu
patent: 4846311 (1989-07-01), Thangavelu

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