Elevator Group Control with Dynamic Zone Assignment
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Solution Overview
Problem
Conventional elevator systems experience fluctuations in transportation efficiency due to uneven distribution of car calls across different elevator cars, leading to reduced overall efficiency.
Innovation Solution
An elevator group supervisory control system that includes a hall registration device, display device, limit value setting, count-up, candidate car selecting, and prediction arithmetic means to optimize car call assignment, ensuring that no single car is overloaded by setting and managing limit values for each floor based on estimated traffic flow and simulation data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If car calls are concentrated in a specific zone with fixed zone-car associations, then the response time for calls in that zone is improved, but the transportation efficiency fluctuates and overall system efficiency decreases
Solution Approach 1:
The patent implements dynamic zone assignment where zones are not fixed to specific cars but are reassigned based on real-time traffic flow patterns. The supervisory control system continuously monitors call concentrations and dynamically adjusts which car serves which zone, allowing the system to adapt to changing traffic conditions and maintain optimal transportation efficiency across all cars.
Solution Approach 2:
The system changes the parameter of zone-car association from static to dynamic by introducing a supervisory control mechanism that modifies zone assignments based on detected traffic flow patterns. This parameter change enables the system to respond to varying call concentrations and prevent transportation efficiency fluctuations.
2Adaptability or versatility
If zones are expanded to accommodate calls outside original zones, then more calls can be served by existing cars, but the transportation amount becomes uneven across cars
Solution Approach 1:
The patent segments the building into multiple zones and assigns each zone to a specific car based on traffic flow analysis. Rather than expanding zones indiscriminately, the system creates distinct service areas for each car, ensuring that transportation loads are distributed evenly while maintaining comprehensive call coverage across the entire building.
Solution Approach 2:
The system applies local quality by assigning different zone configurations to different cars based on their specific traffic patterns and performance characteristics. Each car operates with optimized zone assignments tailored to its local traffic conditions, achieving both high adaptability and uniform transportation distribution.
3Device complexity
If a single car handles many car calls, then the number of cars required is reduced, but the waiting time and riding time for passengers increase
Solution Approach 1:
The supervisory control system implements feedback mechanisms that monitor car call distributions, waiting times, and riding times in real-time. Based on this feedback, the system dynamically adjusts zone assignments and car dispatch decisions to balance load across available cars, preventing any single car from becoming overloaded and thereby minimizing passenger waiting and riding times.
Solution Approach 2:
The system performs preliminary analysis of traffic flow patterns and call concentrations to proactively assign zones and dispatch cars before peak demand occurs. This preliminary action allows the system to optimize car utilization and prevent time losses by having cars positioned and ready to serve anticipated high-demand zones.
Data Source
AI summary
In an elevator system floors each include: a hall registration device that places a plurality of car calls for moving a car to destination floors different from one another; and a display device that displays the car that has been assigned the plurality of car calls. A limit value setting mechanism sets, for each of the plurality of floors separately, a limit value for limiting a count of the plurality of car calls that can be assigned to the same car. A count-up mechanism obtains, when a new car call is made, a call count of each car by a given method, based on information about the plurality of car calls that have been assigned to the car. A candidate car selector compares the limit value set to a floor where the new car call is made and the call count of the each car, to thereby select, as a candidate car, the car to which the new car call can be assigned from among the cars.