Abstract:
An elevator control of an elevator installation having at least two elevator cars movable independently of one another in a common elevator includes a control device for maintaining a defined minimum distance between two successive ones of the elevator cars and a defined maximum distance between two successive ones of the elevator cars.
Abstract:
An elevator group management controller, that: predicts an arrival time each elevator car can arrive from a present position to a floor where a hall call is generated; estimates a travel distance for each car from its present position to stop in response to every car call to be handled by the car; calculates a waiting time with respect to the hall call based upon the predicted arrival time, for evaluating a waiting time by employing a first evaluation function while the waiting time is employed as an evaluation index, and for evaluating a travel distance by employing a second evaluation function employing the estimated travel distance as an evaluation index; and calculates an integral evaluation function containing at least the waiting time evaluation and travel distance evaluation for each car, and assigns a car whose integral evaluation function value is minimum with respect to the hall call.
Abstract:
A method for modernization of an elevator installation with several elevators in a building, wherein at least one floor terminal for input of a floor call is provided on at least one floor of the building, which floor terminal is, for communication of an input floor call, connected with a group control, and at least one elevator is controlled in drive in accordance with the communicated floor call by the group control, includes connecting at least one call detecting unit, for communication of an input floor call, with the group control. At least one new floor terminal is, for input of a floor call, mounted on at least one floor and the new floor terminal is, for communication of an input floor call, connected with the call detecting unit.
Abstract:
When an average wait time is low (23, 24) an elevator car (31-34) is parked (39), unable to answer calls, or if a parameter (45) is low (46), the car is shut-down. If wait time is high, a parked car is assigned the call. If no cars are parked, a shut-down car may be assigned based on RRT. If up running cars can answer the call, the down running cars are excluded.
Abstract:
An elevator group control system is provided which stably keeps cage's position in temporally equal interval condition over a long period of time. The present invention provides a system comprising: reference route generating means, which for each elevator, generates a reference route which the elevator should follow with respect to the time axis and position axis; and assignment means which selects an elevator for assignment to a generated hall call so as to make the actual trajectory of each elevator closer to its reference route. Since reference routes which guides the cage's trajectory into temporally equal interval condition are generated and car assignment is executed so as to make the respective cages follow their reference routes, it is possible to allow the cages to settle in temporally equal interval condition over a long period of time.
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:
A method controls the distribution of free cars in an elevator system. First, the number of free cars in the elevator system are counted whenever this number changes. At the same time, the arrival/destination rates of passengers at each of the floor is determined. The rates are used to identify up-peak and down-peak traffic patterns. The floors of the building are then assigned to zones. The number of floors in each zone is determined according to the arrival rates, and the free cars are then parked in the zones so that the expected waiting time of the next arriving passenger is minimized.
Abstract:
A method controls an elevator system including multiple elevator cars and multiple floors. A new passenger at one of the floors signals a hall call. In response to receiving the hall call, the method determines, for each car, a set of all possible future states of the elevator system. The future states depend on the current state of the system, which is defined by passengers already assigned to cars, the direction of travel, position and velocity of the cars. A cost function is evaluated to determine a cost for each set of all possible future states. Then, the car associated with the set having a least cost is assigned to service the hall call. The method is applicable to any type of traffic. It is particularly well-suited for up-peak traffic because it handles efficiently the uncertainty in passenger destinations.
Abstract:
In an elevator system in which two cars operate in each shaft, there is provided an elevator group control apparatus providing efficient services while preventing collisions of cars in each shaft. The elevator group control apparatus includes a traffic detection part which detects data of car traffic generated in a building; a zone setting part which sets a dedicated zone and a common zone for each of upper and lower cars in accordance with detection by the traffic detection part; an assignment decision part which decides a car to be assigned to a call generated at a hall in accordance with the call generation floor, direction of response to the call, and a zone set by the zone setting part; an entry determination part which, when a first of two cars in each shaft is coming into the common zone from its dedicated zone, determines, based on position, direction of movement, and state of the other car in the same shaft, whether the first car in each shaft is permitted to enter the common zone; a passing-by instruction part which gives a passing-by instruction to a prescribed floor in the dedicated zone to make each car exit from the common zone to its dedicated zone after each car has entered the common zone; and an operation control part which controls operation of each car based on a decision by the assignment decision part, a determination by the entry determination part, and an instruction by the passing-by instruction part.
Abstract:
The present invention improves the performance of the group control of elevators by shortening the waiting time for connections to the top floor in a system composed of a plurality double deck elevators having upper decks (1aU)null(1eU) and lower decks (1aL)null(1eL), respectively.