摘要:
A method for controlling an elevator group including at least a first elevator and a second elevator, wherein a counterweight balance of the first elevator differs from a counterweight balance of the second elevator, the method including: controlling the elevator group; determining threshold loads for the first and second elevator separately for up and down direction, a threshold load being dependent of the counterweight balance of the corresponding elevator, wherein the threshold load being a load for which consumed energy per up-down run is approximately zero; and controlling, when allocating an elevator in response to a destination call, route determination for the first and second elevator involves minimizing a load difference from the threshold loads.
摘要:
A system and method for monitoring presence, location, movement and/or attitude of one or more objects (106) in a monitored space (108). The system comprises sensors, which are arranged to certain part of the monitored space (108), e.g. to floor, wall or ceiling (110). The sensors are distance measuring ultrasonic sensors (102, 201, 202, 203) which produce measurement results and the system is configured to determine presence, location, movement and/or attitude of an object (106) based on the measurement results.
摘要:
An elevator group control method for allocating landing calls and car calls to elevators so that the objectives set are met. In the method, a car-specific energy consumption file is generated to describe the energy consumption occurring during each trip of the elevator from each floor to each one of the other floors with different loads, and the calls are so allocated that the energy consumption resulting from serving all the active calls is minimized.
摘要:
A method and system determine peak power consumption over time (401) by a bank of elevator for servicing a set of passenger hall calls and delivery requests, and selecting elevator schedules that keep peak power consumption below a predetermined threshold. For each car in response to receiving a hall call, a set of all possible paths to service all hall calls assigned to the car are determined, in which each path includes a set of all possible segments (100). A peak power consumption for each possible segment is also determined (200). The peak power consumptions for the set of all possible segments for each time instant are added to determine a total peak power consumption for each time instant, and a particular path is selected as a schedule to operate the bank of elevator cars, if the total peak power consumption for any instant in time while operating according to the selected schedule is below a predetermined threshold.
摘要:
The present invention discloses a method for optimal routing of the elevators in an elevator system in a situation where the supply power received by the system is limited e.g. due to emergency power operation. In the invention, routes are optimized by using a cost function to which has been added a term containing the summed instantaneous power consumed. Power consumption is monitored in real time, and the elevators need a start permission from the control system. A route alternative that exceeds the power limit is penalized in the cost function by a so-called penal term. With the elevator routing obtained as a result, the instantaneous power consumed by the system remains continuously below the set power limit. Some call can thus be postponed to be served later. By the method of the invention, the number of elevators serving passengers in an emergency power situation can be varied dynamically .
摘要:
An elevator group control method for the allocation of calls, in which the method a given service time of the elevator group is assigned a target value. The service time may be passenger waiting time, call time, traveling time, riding time or an average value of one of these quantities. The method aims at fulfilling the assigned target value in such a way that the energy consumption of the elevator system is minimized. Optimization is implemented using a model of the elevator system, by means of which the desired service time can e predicted. This prediction is utilized in a controller controlling the optimizer. This makes it possible to improve the construction and operation of the controller and optimizer so that the energy consumption of the elevator system can be reduced while the condition regarding the target service time is fulfilled at the same time.