Door Control System with Dynamic Speed Adaptation for Obstacle Impact
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Solution Overview
Problem
Existing door control systems with obstacle detection lack efficiency in resuming normal operation after repeated impacts, often causing damage to doors and obstacles due to inadequate speed control and prolonged closure times.
Innovation Solution
A door control system that detects impacts, reverses direction, and adjusts speed to reduce energy upon repeated encounters, allowing automatic resumption of normal movement once the obstacle is removed, with a limited number of reduced-speed cycles to prevent prolonged impacts and conserve energy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the door closes at constant high speed, then productivity is improved, but the door may cause damage to obstacles and increase harmful factors
Solution Approach 1:
The door control system dynamically adjusts its speed based on operational context: operating at high speed v1 during normal closure to maximize productivity, and automatically reducing to low speed v2 when approaching the impact position after obstacle detection to minimize damage. This dynamic speed adaptation resolves the contradiction between fast closure and safe operation.
Solution Approach 2:
The system changes the speed parameter from v1 (high speed) to v2 (low speed) when specific conditions are met (obstacle detected and door at impact position). This parameter transformation allows the system to optimize both productivity and safety by selecting appropriate speed levels based on real-time operational state.
2Reliability
If the door reverses direction completely after obstacle detection, then safety is improved, but loss of time occurs due to full opening and manual reactivation required
Solution Approach 1:
Instead of completely reversing the door to the initial position (excessive action), the system performs a partial reversal only to the waiting position Pwaiting, which is sufficient to remove the obstacle. This partial action maintains safety while minimizing time loss and enabling automatic resumption of closure.
Solution Approach 2:
The system continuously monitors obstacle presence and uses this feedback to control door movement. After reversing to Pwaiting, the system checks whether the obstacle remains, and if removed, automatically resumes closure without manual intervention. This feedback loop enables automatic operation and reduces time loss.
3Reliability
If the door operates at low speed after obstacle removal, then protection against damage is improved, but productivity decreases due to excessively long closure time
Solution Approach 1:
The system dynamically switches between speed modes: low speed v2 when protection is needed (approaching impact position after obstacle detection), and high speed v1 during normal operation or when obstacle is confirmed removed. This dynamic speed selection resolves the contradiction between protection and productivity.
Solution Approach 2:
The system maintains continuous useful action by automatically resuming closure at high speed v1 once the obstacle is removed, rather than maintaining low speed throughout. This continuous optimization of speed ensures both protection during critical phases and productivity during safe phases.
4Productivity
If repeated cycles are performed at high speed, then productivity is maintained, but harmful factors increase due to repeated impacts on the obstacle
Solution Approach 1:
The system changes the speed parameter from v1 to v2 specifically during repeated cycles when an obstacle is detected at the impact position. This parameter transformation reduces impact energy and prevents cumulative damage while maintaining operational continuity.
Solution Approach 2:
The system takes preliminary anti-action by reducing speed before repeated impacts can occur. When an obstacle is detected, the system proactively switches to low speed v2 for subsequent cycles, preventing damage before it accumulates.
Data Source
AI summary
System for controlling a door enabling driving from an initial position of its travel in a first direction at a speed v1 as far as a final position, said control system comprising a safety function comprising means for keeping a door in operation despite its having suffered an impact against an obstacle situated on its travel and enabling it to continue its initial movement automatically as soon as said obstacle is removed, through a design reconciling a sufficiently high normal speed of movement v1 of the door with the intention to prevent damage both to the obstacle and to the door by reducing the speed to v3<v1 close to the stored position of the impact.