RFID Train Door Parameter Transfer for Platform Screen Door Control
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Solution Overview
Problem
Existing subway trains lack a return channel for communication to open platform screen doors, requiring complex and costly radio-based add-on systems that interfere with train logic and increase weight.
Innovation Solution
A system using RFID transponders and antennas to transmit and receive train door parameters, processed by a programmable logic controller to safely and efficiently control platform screen doors with minimal impact on the train and track infrastructure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If radio-based add-on systems are installed to enable door control communication, then door opening function is achieved, but system complexity increases
Solution Approach 1:
The patent replaces complex radio-based communication systems with a simple RFID transponder system. The transponder stores door control parameters and communicates them to the platform door control unit via RFID reading units, eliminating the need for complex bidirectional radio communication while achieving reliable door opening functionality.
Solution Approach 2:
The patent uses RFID transponders that store copies of door control parameters (door release, door open, door close signals) that would normally be transmitted through complex radio systems. This copying approach simplifies the communication infrastructure while maintaining the necessary control functions.
2Reliability
If radio-based add-on systems are installed to enable door control communication, then door opening function is achieved, but cost increases
Solution Approach 1:
The patent employs RFID transponders, which are inexpensive components compared to radio-based communication systems. These transponders can be easily manufactured and installed on existing trains, providing a cost-effective solution for enabling door control functionality in driverless subway operations.
3Reliability
If radio-based add-on systems are installed to enable door control communication, then door opening function is achieved, but weight increases
Solution Approach 1:
The patent replaces heavy radio communication equipment with lightweight RFID transponders and reading units. The RFID system requires minimal hardware with no power supply, resulting in negligible weight addition to the train while achieving the necessary door control communication function.
4Reliability
If radio-based add-on systems are installed to enable door control communication, then door opening function is achieved, but interference with existing train logic increases
Solution Approach 1:
The patent extracts the communication function from the complex radio-based system and implements it through a separate, independent RFID transponder system. This extraction allows the door control functionality to be added without interfering with the existing train logic and control systems.
Solution Approach 2:
The RFID transponder acts as an intermediary that stores and transmits door control parameters without requiring integration into the existing train control logic. The platform door control unit reads the parameters from the transponder, creating an independent communication path that does not interfere with existing train operations.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables safe and cost-effective retrofitting of driverless subway trains with minimal weight and interference, ensuring reliable and timely opening and closing of platform doors.
Implementation Method 1
The RFID system consists of an RFID transponder, located on or inside the object (here: train), and an RFID reader with an RFID antenna for reading this identifier. The connection is established primarily through alternating magnetic fields generated by the RFID reader or the RFID antenna via high-frequency radio waves.
Implementation Method 2
The connection is established primarily through alternating magnetic fields generated by the RFID reader or the RFID antenna via high-frequency radio waves.
Data Source
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AI summary
The invention relates to a system with a transmitting device (17) for transmitting a train door parameter, comprising: - a switching unit (10, 11, 14) configured for tapping the train door parameter, and - an RFID transponder sensor unit (15) connected to the switching unit, configured for transmitting the train door parameter to at least one RFID transponder (2), and - the RFID transponder, configured for storing and transmitting the train door parameter, and a receiving device (18) for receiving a train door parameter, comprising: - at least one RFID antenna (3), configured for receiving the train door parameter, - an RFID reading unit (4) configured for reading the train door parameter and forwarding the train door parameter to a programmable logic controller (PLC) (5).- the programmable logic controller (PLC) comprising processing logic for plausibility checks of the train door parameter and configured to forward the plausibility-checked train door parameter to a platform door control unit (7), which is configured to output a control signal to open or close the platform door (8).