Interlocking Mechanical Gap Filler with Platform Screen Door
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Solution Overview
Problem
Existing mechanical gap filler systems often fail to fully extend, leading to hazardous situations where the gap between a platform and a guided vehicle is not filled, posing a risk of passenger falls during exchange.
Innovation Solution
A safety control system that interlocks the mechanical gap filler with both the guided vehicle door and platform screen door, using a communication device and processing unit to determine the extension/retraction state of the gap filler and control the opening/closing states of the doors, ensuring the gap is fully filled before allowing passenger exchange.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the MGF is mechanically interlocked with the GVD opening mechanism, then the GVD can only open when the MGF is fully extended, but passengers on the platform may face an opened PSD while the gap remains unfilled, creating a hazardous situation
Solution Approach 1:
The patent introduces a safety control system as an intermediary between the MGF, PSD, and GVD control mechanisms. This central controller receives status information from all three components and coordinates their operation to ensure the gap is fully filled before allowing door opening, while also managing the interlocking logic to prevent hazardous situations. The intermediary resolves the contradiction by providing centralized coordination that considers all safety parameters simultaneously.
2Productivity
If the MGF extension is synchronized with GVD opening, then passenger exchange can proceed efficiently, but if the MGF fails to extend fully, the hazard is not immediately detected and passengers may step into an unfilled gap
Solution Approach 1:
The patent implements a feedback mechanism where the safety control system continuously monitors the extension status of the MGF through status information from sensors or position indicators. The system only permits GVD opening when feedback confirms the MGF is fully extended, and can detect extension failures to prevent hazardous situations. This feedback loop maintains both efficiency and reliability by ensuring verification before operation.
3Ease of operation
If the MGF is equipped on the platform rather than the vehicle, then the MGF extension synchronizes with PSD opening, but MGF extension failure results in closed PSD while passengers face an opened GVD, leaving the gap unfilled
Solution Approach 1:
The safety control system acts as an intermediary that coordinates the platform-side MGF with both PSD and GVD operations. It receives status information from all components and ensures that the gap is filled before permitting passenger exchange, regardless of which door system is being operated. The intermediary provides centralized safety verification that resolves the contradiction between ease of operation and gap filling assurance.
4Reliability
If mechanical interlocking is used between MGF and door systems, then safety is improved through automatic prevention, but the system complexity increases due to additional interlocking mechanisms and coordination requirements
Solution Approach 1:
The patent replaces complex mechanical interlocking systems with an electronic control-based safety system. The safety control system uses electrical signals, sensors, and software logic to coordinate MGF extension with door operations, eliminating the need for direct mechanical linkages between components. This substitution maintains safety through automated control while reducing mechanical complexity and improving system maintainability.
Data Source
AI summary
A safety control system and a method configured for interlocking a Mechanical Gap Filler (hereafter MGF) with both a Platform Screen Door (PSD) and a Guided Vehicle Door (GVD) of a guided vehicle at standstill. The system is disposed along a platform in order to secure the exchange between the platform and a guided vehicle at standstill along the platform.