BACKGROUND

[oooi] Modern elevator systems allow passengers to request elevator service in various ways. Some systems provide conventional hall call buttons that allow a passenger to indicate a desire to travel up or down from a particular landing. A car operating panel in an elevator car allows the passenger to indicate the floor to which the passenger desires to travel. Other systems include destination entry passenger interfaces that allow a passenger to indicate a desired destination before the passenger boards an elevator car. Such systems assign an elevator car to each passenger according to known car assignment algorithms.

[0002] The destination entry systems can improve elevator service for passengers by handling larger traffic volumes more efficiently and avoiding elevator lobby crowding, for example. One issue presented by such systems, however, is that the car assignments are made without any information regarding the actual space requirements of any particular passenger. If a passenger has a large item or other people that will also be on the elevator car, that space requirement is not accounted for by the car assignment algorithm. It is possible, therefore, to have crowded elevator cars.

[0003] One attempt at addressing this situation is disclosed in U.S. Patent Application Publication No. 2009/0308695. That solution allows a passenger to indicate a need for additional space on an elevator car SUMMARY

[000 ] An exemplary elevator destination entry system includes a passenger interface device that presents a visual representation of at least one item that will accompany a passenger on an elevator car. The passenger interface allows the passenger to select the visual representation. A controller is configured to receive indications of passenger requests for elevator service and an indication from the passenger interface device regarding a selected visual representation. The controller determines an amount of space within an elevator car required to accommodate the item based on predetermined space information corresponding to the selected visual representation. The controller assigns a car to a passenger request based on a determination that the assigned car will have adequate space to accommodate the passenger and the item.

[0005] An exemplary method of controlling car assignments in an elevator destination entry system includes providing a visual representation, on a passenger interface, of at least one item that will accompany a passenger on an elevator car. A determination is made that a passenger used the passenger interface to indicate that the passenger has at least one item that will accompany the passenger on an elevator car corresponding to a selected visual representation. An amount of space within an elevator car required to accommodate the item is determined based on predetermined space information corresponding to the selected visual representation. An elevator car that has the required space available is assigned to the passenger.

[0006] The various features and advantages of a disclosed example embodiment will become apparent to those skilled in the art from the following detailed description. The drawings that accompany the detailed description can be briefly described as follows.

BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 schematically illustrates selected portions of an elevator system designed according to an embodiment of this invention.

[0008] Figure 2 schematically illustrates an example passenger interface useful with the example of Figure 1.

DETAILED DESCRIPTION

[0009] Figure 1 schematically shows selected portions of an elevator system 20. A passenger interface 22 facilitates a passenger 24 making a request for elevator service. In the illustrated example, the passenger interface 22 is part of a destination entry system in which the passenger 24 indicates a desired destination before the passenger 24 enters an elevator car.

[oooio] An input portion 26 allows the passenger to indicate a particular floor of the building to which the passenger 24 wishes to travel. In some examples, the input portion 26 comprises a key pad. A display portion 28 provides information to the passenger 24 such as instructions for using the passenger interface 22, which of the cars A,B, C or D is assigned to carry that passenger to the desired destination, for example. In some examples, the display portion 28 comprises a touch screen that is useable as an input component.

[oooii] The passenger interface 22 facilitates elevator car assignments that take into account any special space requirements of each passenger. The display portion 28 presents a visual representation of at least one item that will accompany a passenger on an elevator car. The passenger interface 22 allows the passenger 24 to select an appropriate visual representation corresponding to such an item. The illustrated example includes four visual representations schematically shown at 30, 32, 34 and 36. Each of the visual representations comprises an image or icon that corresponds to a particular item or items, for example. In some examples, at least one of the visual representations is included on a dedicated button that is part of the input portion 26.

[00012] A controller 40 is configured to receive indications of passenger requests for elevator service entered through the passenger interface 22 and to make elevator car assignments according to a selected destination dispatch algorithm, which can be a known algorithm. The controller 40 also receives an indication from the passenger interface 22 regarding a selected visual representation. The controller 40 determines an amount of space within an elevator car required to accommodate the item based on predetermined space information corresponding to the selected visual representation. The controller 40 assigns a car A-D to a passenger request based on a determination that the assigned car will have adequate space to accommodate the passenger and the item.

[00013] One feature of the illustrated example is that the visual representations correspond to the item or items that a passenger desires to bring on the elevator car. Figure 2 illustrates an example display screen 28 that includes a plurality of visual representations corresponding to items that would possibly be brought by a passenger onto an elevator. In this example, some of the visual representations pertain to different items while others pertain to different numbers of the same type of item. The passenger 24 can easily select a visual representation corresponding to that which the passenger will bring onto the elevator car.

[0001 ] This example has a first visual representation 42 of a single piece of luggage. Another visual representation 44 corresponds to two pieces of luggage while a third visual representation 46 shows three pieces of luggage. A passenger who has two pieces of luggage can select the visual representation 44 by touching the corresponding portion of the screen if the display 28 comprises a touch screen. Other techniques can be used to select an appropriate visual representation.

[00015] The controller 40 has information regarding an amount of space corresponding to each of the visual representations. Depending on which one of the visual representations, if any, a passenger selects, the controller 40 determines how much space to allocate for that passenger when making a car assignment for that passenger. The controller 40 also maintains information regarding those space requirements when considering further assignments to the same car until that car has arrived at that passenger' s intended destination.

[00016] The illustrated example also includes visual representations of a luggage cart 48, a food service cart 50 and custodial items 52 such as a laundry cart or a housekeeping cart. Each of the visual representations 42-52 are useful in a hotel building, for example. Others of the example visual representations are useful in office or hospital settings, for example. The visual representation 54 shows a cart that may be used for deliveries or as a mail cart, for example. The visual representation 56 shows a single package and the visual representation 58 shows multiple packages. The visual representation 60 shows a wheelchair and the visual representation 62 shows a hospital bed or an ambulance gurney.

[00017] The disclosed embodiment allows for customized visual representations to be used depending on the needs of a particular situation. Passenger interfaces 22 in buildings located on a coast, for example, can include visual representations of a surf board or scuba gear. Passenger interfaces 22 in buildings near ski resorts may include visual representations of skis or snowboards, for example. In each instance, the controller 40 has information regarding an appropriate amount of space required to accommodate each such item.

[00018] Other visual representations indicate a number of individuals accompanying a passenger. For example, a passenger may have a friend or her family with her and can select a visual representation showing the number of people with her. This eliminates a need for each of them to make their own request in order for the controller 40 to know how many people will be on the assigned elevator car.

[00019] Each of the visual representations corresponds to a different amount of space required to accommodate the represented item. The controller 40 has predetermined information regarding an appropriate amount of space needed on an elevator car for each such item. The controller 40 uses that information as described above. The illustrated example, therefore, facilitates car assignments that reserve an appropriate amount of space within an elevator car depending on the item or items. The passengers can easily indicate a need for additional space by selecting an appropriate visual representation.

[00020] The preceding description is exemplary rather than limiting in nature.

Variations and modifications to the disclosed example may become apparent to those skilled in the art that do not necessarily depart from the essence of this invention. The scope of legal protection given to this invention can only be determined by studying the following claims.