Elevator Controller Logic for Door Zone Call Prioritization
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Solution Overview
Problem
Elevator systems consume excessive energy and manage calls inefficiently by moving cars from one floor to another and back, especially when a call is received at a different floor before the car has left the initial floor.
Innovation Solution
Implement a method and controller that check if the elevator shaft door is closed, if the car is within the door zone, and if no person is inside before moving the car to another floor, allowing it to return to the initial floor or open the door if these conditions are met when a call is received, thereby minimizing movement and optimizing call management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the elevator car moves to the second floor and then returns to the first floor to service a call, then the call is serviced, but energy is consumed excessively and service time is increased
Solution Approach 1:
The controller checks conditions (shaft door closed, car within door zone, no person inside) before the elevator car departs to determine if a return trip is necessary. This preliminary assessment prevents unnecessary movements to the second floor, eliminating wasteful energy consumption while ensuring calls are serviced efficiently
2Reliability
If the elevator car moves to the second floor and then returns to the first floor to service a call, then the call is serviced, but the management of calls is inefficient and time is increased
Solution Approach 1:
The controller performs preliminary condition checks (shaft door closed, car within door zone, no person inside) before the elevator car departs to the second floor. This advance determination prevents unnecessary round trips, reducing service time for call management while maintaining reliable call servicing
3Use of energy by moving object
If the elevator car returns to the first floor before being moved to the second floor when conditions are fulfilled, then energy is saved and call management is efficient, but the system complexity increases
Solution Approach 1:
The controller continuously monitors conditions (shaft door status, car position within door zone, occupancy status) and uses this feedback to dynamically determine whether to service calls at the first floor before departing to the second floor. This feedback mechanism enables energy-efficient operation through logical decision-making without requiring complex additional hardware
Data Source
Figure 1~2
AI summary
A method of controlling an operation of an elevator system (1) is proposed, wherein the method comprises the following steps: checking as a first condition if an elevator shaft door of a first floor (30) has been closed to move an elevator car (25) to a second floor (50); checking as a second condition if the elevator car (25) is still within a door zone (35) of the first floor (30), in which an elevator car door of the elevator car (25) is not yet locked; and if the first condition and the second condition are fulfilled when an elevator call for the first floor (30) is received, moving the elevator car (25) back to an entrance level of the first floor (30) and/or opening the elevator shaft door of the first floor (30) before moving the elevator car (25) to the second floor (50).