Patent
"Artificial Intelligence" based learning system predicting "Peak-Period" times for elevator dispatching
Kandasamy Thangavelu
- 02 Mar 1990
95
TL;DR: In this article, an elevator dispatching system for controlling the assignment of elevator cars is presented, which is directed to a method of determining the commencement and/or conclusion of UP-peak and DOWN-peak periods of operation.
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Abstract: The present invention is directed to an elevator dispatching system for controlling the assignment of elevator cars. More particularly, the present invention is directed to a method of determining the commencement and/or conclusion of UP-PEAK and DOWN-PEAK periods of operation. For example, for commencing UP-PEAK operation, a lobby boarding count is predicted, based on historical information of the number of passengers boarding the elevators at the lobby. The predicted lobby boarding count is compared with a predetermined threshold value. If the predicted lobby boarding count is greater than the predetermined threshold value, UP-PEAK is commenced. In the preferred embodiment, the predetermined threshold value is a predetermined percentage of the building's population. Additionally, the present invention is directed to a method of adjusting the threshold value based on actual passenger traffic. For example, once UP-PEAK is commenced, the load of the first few elevators leaving the lobby within a predetermined time interval is determined, and the threshold value is adjusted based on their determined load. If the determined load is greater than a certain percentage of the elevator car's capacity, indicative of starting UP-PEAK too late, the threshold value is decreased. Similarly, if the determined load is less than a certain percentage of the elevator car's capacity, indicative of starting UP-PEAK too soon, the threshold value is increased.
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References
Patent
Adaptive assignment of elevator car calls
Frederick H Nowak,Isabel Hovey +1 more
- 17 Nov 1986
TL;DR: In this paper, destination calls are entered via a destination call entry device touch pad such as a (12) so that overall system response can be optimized during up-peak service intervals.
54
Patent
Queue based elevator dispatching system using peak period traffic prediction
Kandasamy Thangavelu
- 20 Jun 1989
TL;DR: In this article, the authors used a linear exponential smoothing model to predict future traffic flow levels for the floors for five minute intervals, using traffic levels measured during the past few time intervals on that day as real time predictors, and traffic level measured during similar time intervals in previous similar days as historic traffic predictors.
52
Patent
Relative system response elevator call assignments
Bittar Joseph
- 03 Dec 1980
TL;DR: In this paper, a microprocessor-based group controller is used to assign calls to cars based on the summation for each car, with respect to each call, a weighted summation of a plurality of system response factors indicative of conditions of the car irrespective of the call to be assigned, and indicative of condition of car relative to the call, including factors relating to preferring cars which are running, which require motion to provide service already assigned to the car, which are not positioned at the lobby, which do not have excessive car calls in them and so forth.
52
Patent
People and object counting system
Francois M. Mottier
- 16 Oct 1979
TL;DR: In this article, the perimeter of an area is scanned along two adjacent paths which define spacially resolved gates through which objects and people must pass to enter and leave the area, and the presence and location of people and objects are detected.
51
Patent
Elevator traffic demand detector
Kaneko Takashi,Tatsuo Iwasaka +1 more
- 18 Feb 1976
TL;DR: In this article, a device is provided for detecting the latest information on traffic demand based on the number of passengers actually boarding and alighting from cars (hereinafter referred to as the "boarding-and-alighting passengers").
43
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