Aircraft Lavatory Door Control System for Hygienic Touchless Operation
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Solution Overview
Problem
Existing aircraft lavatory door systems require manual operation, which can be hygienically unsatisfactory and inconvenient, especially during flight phases when the lavatory should be locked.
Innovation Solution
A control and information system that includes a door actuator, lock actuator, controller, human-machine interface, and communication interface, allowing for touchless operation and remote control of the lavatory door, including automatic locking during specific flight phases.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual operation of the lavatory door is used, then the device complexity is low, but the ease of operation deteriorates due to hygiene concerns and inconvenience
Solution Approach 1:
The patent replaces the traditional mechanical manual operation system with an automated actuation system that uses electric motors to open and close the door, eliminating the need for physical contact with the door handle and improving hygiene while maintaining ease of operation through automated control
Solution Approach 2:
The system enables self-service operation where passengers can automatically open and close the lavatory door through automated sensors and actuators without requiring manual intervention, allowing the door to respond automatically to passenger presence and exit conditions
2Reliability
If automatic locking during flight phases is implemented, then the reliability improves for passenger safety, but the device complexity increases
Solution Approach 1:
The system performs preliminary action by automatically locking the lavatory door before critical flight phases begin (takeoff, landing, turbulence) based on pre-programmed flight phase detection, ensuring safety is established in advance without requiring real-time manual intervention
Solution Approach 2:
The system uses feedback from flight phase sensors and communication interfaces to automatically adjust door locking status, receiving real-time information about flight conditions and automatically responding by locking or unlocking the door to maintain passenger safety throughout the flight cycle
3Ease of operation
If touchless operation is implemented, then the ease of operation improves for hygiene, but the device complexity increases
Solution Approach 1:
The patent replaces mechanical contact-based operation with sensor-based detection and automated actuation, using optical sensors and other detection mechanisms to sense passenger presence and exit conditions, eliminating the need for physical contact with door handles and improving hygiene
Solution Approach 2:
The system introduces intermediary sensors and control systems between the passenger and the door mechanism, where sensors detect passenger presence and exit conditions, and automated actuators execute the door operation, serving as an intermediary layer that eliminates direct contact while maintaining operational functionality
Data Source
AI summary
A control and information system is for a lavatory of an aircraft, where the lavatory has a door. The system contains a door actuator for opening and closing, a lock actuator for locking and unlocking the door, a control device for controlling the door actuator and the lock actuator, a human-machine interface for actuating the door by a user, as well as a communication interface for exchanging information between an authorized entity and the control device. The lavatory contains a wall structure supporting the door, and the control and information system. A user controls the door via the human-machine interface. Information about the communication interface is exchanged between the control device and the authorized entity.