Train Door Alignment Using Ground Coil Position Detection
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Solution Overview
Problem
Existing train door opening systems require a long time when a train does not stop at a predetermined position on the platform, necessitating backward inching to align doors, which prolongs the opening process.
Innovation Solution
An on-board control apparatus and platform-door control system that utilize ground coils on the track to detect the train's position and determine the correct door alignment, allowing for immediate opening of vehicle and platform doors even when the train is not at the precise stop position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If backward inching is performed to align train doors with platform doors when the train stops at a non-predetermined position, then door alignment accuracy is improved, but the time required to open doors increases
Solution Approach 1:
The patent replaces the mechanical backward inching operation with an electronic calculation system. The control apparatus calculates the exact number of doors to be opened based on the train's stop position deviation from the predetermined position, eliminating the need for mechanical repositioning and reducing door opening time while maintaining alignment accuracy.
Solution Approach 2:
The patent introduces a control apparatus as an intermediary between the train's stop position detection and the door opening operation. This intermediary calculates the appropriate door configuration based on position information, serving as a mediator that translates position deviation into optimal door opening patterns without requiring physical train repositioning.
2Manufacturing precision
If the train stops at a precise predetermined position on the platform, then door alignment with platform doors is improved, but operational flexibility and speed are reduced
Solution Approach 1:
The patent changes the control parameter from requiring precise physical train positioning to calculating door opening patterns based on position deviation. This parameter change allows the system to accommodate varying stop positions while maintaining door alignment, thereby improving operational speed and flexibility without sacrificing door alignment accuracy.
Solution Approach 2:
The patent introduces dynamic adaptability to the door control system. Instead of a fixed door opening pattern, the system dynamically determines which doors to open based on the actual stop position. This dynamic approach allows the train to stop at various positions while still achieving proper door alignment, enhancing operational flexibility and speed.
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 the opening of vehicle and platform doors in a shorter time than conventional methods by accurately determining the train's position and aligning doors without the need for backward inching, improving operational efficiency.
Implementation Method 1
information on a ground coil located on a track on which the train runs
Data Source
AI summary
A platform-door control system includes an on-board control apparatus provided in a train, and a platform-door control apparatus. The on-board control apparatus includes: a ground-coil information storage unit to store information on a ground coil located on a track on which the train runs; a train-position detection unit to detect a position of the train; a train stop-position specification unit to determine a train stop position on the basis of stored information on the ground coil, and train position information detected by the train-position detection unit; a vehicle-door specification unit to determine a vehicle door of the train to be opened/closed, on the basis of the determined train stop position; and a vehicle-door information output unit to output determined vehicle door information of the train. The platform-door control apparatus receives the vehicle door information output from the vehicle-door information output unit, and controls platform doors installed at a station.