Multi-Cabin Elevator Control Optimizing Start Time and Travel Curves
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Solution Overview
Problem
In multi-cabin elevator systems, long waiting times for passengers occur due to safety measures that require one elevator car to wait until other cars have cleared the area, leading to decreased passenger comfort and increased waiting times.
Innovation Solution
An elevator control system determines the start time and travel parameters for a transport process of one car based on the status parameters of another car, allowing the first car to start and complete its journey more quickly while ensuring safety by optimizing travel curves and parameters, such as speed and acceleration, to avoid collisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If safety measures require a first car to wait until other cars have cleared the area between starting stop and destination stop, then collision prevention is ensured, but waiting time for passengers increases
Solution Approach 1:
The system dynamically adjusts the travel parameters (speed, acceleration) of the first car based on the real-time position and movement status of the second car. Instead of using a fixed waiting period, the control device continuously monitors the area between stops and adjusts the first car's departure time and speed profile to maximize utilization while maintaining safety margins.
Solution Approach 2:
The invention changes the operational parameters of the first car (start time, speed, acceleration) based on the state parameters of the second car. By monitoring the second car's position and movement, the system optimizes the first car's travel parameters to reduce waiting time while ensuring safe operation throughout the shaft.
2Reliability
If the first car waits for the area to be clear before starting transport, then safety is maintained, but transport efficiency decreases
Solution Approach 1:
The control device receives continuous feedback about the second car's position and movement status, and uses this information to dynamically determine the first car's start time and travel parameters. This feedback mechanism allows the system to optimize transport efficiency by allowing the first car to proceed when safe, rather than following fixed waiting protocols.
Solution Approach 2:
The system performs preliminary assessment of the second car's movement status and predicts when the area will be clear, allowing the first car to be prepared and start its journey at the optimal moment rather than waiting passively for a predetermined time period to elapse.
Data Source
Figure 1
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AI summary
The invention relates to a method for operating a lift system (100) comprising at least two cars (110, 120) that can move independently from one another in at least one common lift shaft (101), wherein a first car (110) of the at least two cars (110, 120) is determined by a lift controller (130) to carry out a transport process from an initial stopping position (H3) to a target stopping position (H7), wherein a starting time of the first car (110), at which the first car (110) begins the transport process from the initial stopping position (H3), and drive parameters, according to which the first car (110) carries out the transport process from the initial stopping position (H3) to the target stopping position (H7), are determined by the lift controller (130), wherein the starting time and the drive parameters are determined in consideration of status parameters of at least one second car (120) of the at least two cars (110, 120).