Abstract:
In an elevator control system comprising a plurality of cars serving a plurality of floors, hall call register means provided on the landing of each floor, cage call register means provided in each car, and means for detecting the number of passenger in each car;The improvement comprising means for forecasting the number of in-cage passengers for every destination floor by allotting the detected number of in-cage passengers to the cage calls, means for detecting the number of waiting passengers provided on the landing of specified floors, means for setting the number of waiting passengers on other than the landing of the specified floors, means for sequentially adding the detected number of prospective passengers waiting on each of the specified floors that have generated the hall calls to the detected number of in-cage passengers, means for sequentially adding the setting of the number of waiting passengers on each of the floors other than the specified floors that have generated the hall calls to the number of detected passengers, means for subtracting the number of forecast in-cage passengers for every destination floor from the detected number of in-cage passengers, means for setting the limit of in-cage passenger number, and means for detecting serviceable floors by comparing the forecast number of in-cage passengers for each floor obtained by the addition and subtraction with the limit of in-cage passenger number.
Abstract:
A method schedules cars of an elevator system in a building. The method begins execution whenever a newly arrived passenger presses an up or down button to generate a call for service. For each car, determine a first waiting time for all existing passengers if the car is assigned to service the call, based on future states of the elevator system. For each car, determine a second waiting time of future passengers if the car is assigned to service the call, based on a landing pattern of the cars. For each car, combine the first and second waiting times to produce an adjusted waiting time, the method ends by assigning a particular car having a lowest adjusted waiting time to service the call and minimize an average waiting time of all passengers.
Abstract:
The present invention provides a method and apparatus for use in elevator systems for assigning new hall calls to one of a plurality of available elevator cars. The method comprises calculating for each car a call cost for accepting the new hall call. The call cost is a function of the estimated time to the desired destination of the passenger requesting the new hall call and of the delay that other passagers who are using the elevator car will experience. In one embodiment, a destination is inferred for the passenger requesting the new hall call. In another embodiment, the passenger requesting the hall call may input a desired destination at the time the hall call request is made. The elevator system of the present invention allows for use of both standard up/down hall call entry devices and destination entry devices that allow a particular destination to be entered by a passenger at the time a hall call is requested.
Abstract:
The present invention provides a method and apparatus for use in elevator systems for assigning new hall calls to one of a plurality of available elevator cars. The method comprises calculating for each car a call cost for accepting the new hall call. The call cost is a function of the estimated time to the desired destination of the passenger requesting the new hall call and of the delay that other passagers who are using the elevator car will experience. In one embodiment, a destination is inferred for the passenger requesting the new hall call. In another embodiment, the passenger requesting the hall call may input a desired destination at the time the hall call request is made. The elevator system of the present invention allows for use of both standard up/down hall call entry devices and destination entry devices that allow a particular destination to be entered by a passenger at the time a hall call is requested.
Abstract:
The present invention discloses a method and a system for the allocation of elevators on the basis of calls in an elevator system. The method produces for different route alternatives a cost function wherein the traveling time of each passenger is calculated. The calculation of the traveling time is performed taking into account the time spent while waiting for an elevator at a floor, the ride time in the elevator car, the delaying effect of active landing and car calls on the traveling time and the delaying effect of car calls given by new passengers entering at intermediate stops. The method is advantageous in the destination call system, but in the traditional up-down call system it is possible to utilize information provided by traffic statistics to predict the destination floor. Route alternatives can be created e.g. by using genetic algorithms. Once the route alternative giving the shortest average traveling time has been calculated, the elevators are controlled according to this route. In intensive traffic conditions, traveling time is optimized, and in quiet traffic conditions, passenger waiting time is optimized.
Abstract:
The invention relates to a method for the call allocation in an elevator group using a call allocation unit of an elevator group control. In the call allocation unit, passenger flow data of the elevator group is used to adapt call allocation parameters to improve the performance of the elevator group. Currently it is known that call allocation units have a traffic processing unit which gathers - eventually employing a forecast unit - statistical and historical passenger flow data and processes expected passenger flows which are used to set operating parameters of elevator components, e.g. call allocation parameters of the allocation control, operating parameters of the doors as well as operating parameters of the elevator motor to optimally cope with the expected traffic in the elevator group. Thus, in the morning when heavy up traffic is expected, the elevator cars are controlled as to move downwards to the basement floor after the last passenger has exited the elevator at a destination floor so that it is ready for another upwards travel. Accordingly, also the door opening times in the exit floors can be shortened and the door opening times in the basement floor can be prolonged to meet the requirements of the certain traffic type. On the contrary, in the evening, the elevators are initiated to drive upwards after the passengers have exited the elevator in the base floor, which supports a better downwards performance of the elevator group. There are further traffic types as for example lunch peak traffic where calls are predominating running from all the different destination floors to a certain floor, where e.g. the cafeteria is located.