Carborne Controller for CBTC Work Train Positive Train Stops
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Solution Overview
Problem
Manual work trains lack the necessary communication-based train control (CBTC) equipment, preventing them from operating safely and efficiently on modern subway lines equipped with CBTC wayside equipment, necessitating the retention of outdated wayside signals for safety, which undermines the benefits of CBTC.
Innovation Solution
A carborne controller installed in a train's powering unit, equipped with a positioning system interface, wireless receiver, and control module, enables automatic positive train stops and speed enforcement using existing CBTC wayside equipment, eliminating the need for onboard CBTC and field-based signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual work trains operate on CBTC-equipped lines without onboard CBTC equipment, then the benefits of removing wayside signals are lost, but equipping work trains with full CBTC is difficult and costly
Solution Approach 1:
The patent extracts only the essential safety functions from the full CBTC system, implementing a simplified controller that provides automatic positive train stop and speed enforcement without requiring complete CBTC onboard equipment. This selective extraction enables work trains to operate safely on CBTC lines while avoiding the complexity and cost of full CBTC installation.
Solution Approach 2:
The simplified carborne controller is designed to be universally applicable to manual work trains, providing multiple safety functions including automatic positive train stop, speed enforcement, and integration with both CBTC and traditional wayside signal systems. This multi-functionality allows a single device to address various safety requirements without needing separate specialized equipment.
2Device complexity
If wayside signals are removed to achieve CBTC benefits, then signal system complexity is reduced, but manual trains cannot operate safely without them
Solution Approach 1:
The simplified carborne controller acts as an intermediary device that bridges manual work trains and the CBTC wayside equipment. It receives information from the wayside system and provides automatic safety enforcement, eliminating the need for manual trains to rely on traditional wayside signals while maintaining safe operation through automated control functions.
3Reliability
If full CBTC is installed on work trains, then safe operation on CBTC lines is achieved, but cost and complexity increase significantly
Solution Approach 1:
The patent segments the CBTC functionality into essential safety components only, separating automatic positive train stop and speed enforcement from other full CBTC features. This segmentation allows work trains to gain the necessary safety integration with CBTC lines while avoiding the complexity and cost of implementing the complete CBTC onboard system.
Data Source
AI summary
A train control system includes a carborne controller (100) installed in a powering unit coupled to a train, the carborne controller (100) including a positioning system interface (110), a wireless receiver (120), and a control module (130) for performing a positive train control (PTC) mode, communication-based train control (CBTC) wayside equipment (200) comprising a zone controller (210), wherein the CBTC wayside equipment (200) and the carborne controller (100) are configured to communicate via a wireless communication link, and wherein the control module (130), through operation of at least one processor (140), is configured to localize the powering unit utilizing the positioning system interface (110), receive physical signal aspects and virtual PTC signal aspects from the CBTC wayside equipment (200), and enforce an automatic positive train stop (PTS) at a restrictive physical signal (30) or virtual PTC signal located ahead of the train.