Train Door Control Device Obstruction Handling
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Solution Overview
Problem
Existing door control systems for trains lack sufficient safety measures to prevent unsafe door open operations when obstructions occur in door close detection switches or lock mechanisms, potentially leading to accidents during train operation.
Innovation Solution
A door control device with enhanced software functionality that continuously performs close operations until a switch is detected ON, outputs obstruction signals when repeated reclose attempts occur, and includes an obstruction close position maintenance control to prevent quick door open and close recycle operations, ensuring safe door states even with obstructions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the door control system uses conventional detection methods with door close detection switches and lock mechanisms, then the door can be controlled to open and close, but the system lacks sufficient safety measures to prevent unsafe door open operations when obstructions occur
Solution Approach 1:
The patent implements a feedback mechanism by continuously monitoring the operational status of door close detection switches and lock mechanisms. The control unit receives detection results and adjusts door operations accordingly, creating a closed-loop control system that enhances safety without requiring complex additional hardware.
Solution Approach 2:
The control unit automatically determines door operational status by integrating detection results from existing components. The system performs self-diagnosis and makes autonomous decisions about door operation safety, eliminating the need for additional complex safety devices while improving reliability.
2Reliability
If the door control system performs continuous close operations when obstructions are detected, then unsafe door open states are prevented, but quick recycle operations may still occur leading to unsafe running conditions
Solution Approach 1:
The patent applies preliminary anti-action by implementing a prevention mechanism that identifies and blocks quick recycle operations before they can occur. The control unit monitors operation patterns and proactively prevents harmful quick recycle sequences, addressing the harmful effect before it manifests.
Solution Approach 2:
The system uses feedback to continuously monitor door operation status and detect abnormal quick recycle patterns. Based on this feedback, the control unit adjusts operations to prevent unsafe running conditions while maintaining necessary door closure safety.
3Ease of operation
If the system uses existing door close detection switches and lock mechanisms, then basic door control is achieved, but obstruction signals are not properly output when repeated reclose attempts occur
Solution Approach 1:
The control unit is configured to anticipate potential obstructions by monitoring detection switch status across multiple operation cycles. By performing preliminary analysis of detection patterns, the system can identify obstruction conditions and output appropriate signals before repeated reclose attempts create unsafe conditions.
Solution Approach 2:
The system enhances obstruction detection by implementing feedback-based pattern recognition. The control unit analyzes detection results from multiple cycles and adjusts its response based on the accumulated information, improving obstruction detection accuracy while maintaining basic door control functionality.
Data Source
AI summary
A door control device is disclosed. In the door control device, after operation of “Full Close” in one status has been detected, obstruction occurs in a door close detection switch ON/OFF detection portion so that one event “Dcsm=OFF”, e.g. a signal (Dcsm=OFF) indicating OFF detected by the door close detection switch ON/OFF detection portion is obtained. On this occasion, operation of “ReClose” in another status is executed so that drive toward a close direction is continued by a door close control portion through a reclose command portion until another event “Dcsm=ON”, e.g. a signal (Dcsm=ON) indicating ON detected by the door close detection switch ON/OFF detection portion is obtained.