Elevator Control for Sabbath Mode Without Unnecessary Stops
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Solution Overview
Problem
Elevator systems operating in Sabbath mode are inefficient and inconvenient for non-observers due to time-consuming pre-programmed sequences that require doors to open at every floor, necessitating separate elevators for Sabbath and non-Sabbath observers.
Innovation Solution
An elevator system that operates in a pre-programmed sequence to minimize delay by skipping certain stops based on user presence detection, allowing direct travel to designated floors and optimizing door operations based on user input.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the elevator operates in a pre-programmed sequence stopping at every pre-designated floor in Sabbath mode, then Sabbath observers can use the elevator without operating controls, but non-Sabbath observers experience unnecessary delays due to stops at floors where no users are present
Solution Approach 1:
The elevator system dynamically switches between two operational modes: Sabbath mode (pre-programmed sequence with stops at all floors) and non-Sabbath mode (on-demand stops based on user presence detection). This dynamic adaptability allows the system to optimize performance for different user groups without requiring separate elevators.
Solution Approach 2:
The system uses user presence sensors to detect whether a user is waiting at each floor and provides feedback to the controller. Based on this feedback, the controller determines whether to stop at intermediate floors or proceed directly to the destination floor, eliminating unnecessary delays for non-Sabbath observers while maintaining Sabbath mode operation when appropriate.
2Ease of operation
If the elevator stops at every pre-designated floor and opens doors in pre-programmed sequence, then all floors are accessible, but travel time increases due to unnecessary stops and door operations
Solution Approach 1:
The system extracts and removes unnecessary stops and door operations from the pre-programmed sequence by detecting user presence in advance. When no user is detected at an intermediate floor, the elevator skips the stop and door operation, thereby reducing travel time while still maintaining the capability to stop at all floors when needed.
Solution Approach 2:
The system performs preliminary user presence detection at each floor before the elevator arrives. This advance detection allows the controller to pre-determine the optimal stopping sequence, eliminating delays caused by stopping and opening doors at floors where no users are present.
3Productivity
If separate elevators are provided for Sabbath and non-Sabbath observers, then each group has optimized service, but device complexity and space requirements increase
Solution Approach 1:
The elevator system is designed to perform multiple functions by switching between Sabbath mode and non-Sabbath mode operation. A single elevator car with a controller capable of executing different operational sequences serves both Sabbath observers (who require pre-programmed operation) and non-Sabbath observers (who benefit from on-demand stops), eliminating the need for separate elevators.
Data Source
AI summary
A method for operating an elevator including operating the elevator in a pre-programmed sequence to stop at pre-designated floors in a predetermined order, upon receipt of an indication that a user at a given floor wishes to ride the elevator, temporarily not performing part of the pre-programmed sequence in order to arrive at the given floor with minimum delay and thereafter, in the absence of another indication that a user wishes to ride the elevator, continuing to temporarily not perform part of the pre-programmed sequence in order to arrive at a pre-designated egress floor with minimum delay and thereafter operating the elevator in the pre-programmed sequence including performing the part of the pre-programmed sequence to stop at pre-designated floors at pre-programmed times until receipt of an indication that a user at a given floor wishes to ride the elevator.