Rail Signal Enforcement Using UWB and RFID Train Separation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing rail vehicle control systems face challenges in maintaining accurate vehicle spacing and responding to control signals, particularly in environments where GPS is unreliable, leading to potential collisions and accidents due to human or equipment errors.
Innovation Solution
A rail vehicle control system utilizing transponder sensor modules, RFID readers, and ultra-wideband communication to detect distances and enforce safe vehicle separation, with automatic braking capabilities when necessary, and a data collection system to manage vehicle location and speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If GPS is used to monitor rail vehicle spacing, then vehicle location can be tracked, but GPS signal is unavailable or degraded in subterranean tunnels and subways
Solution Approach 1:
The patent introduces transponder sensor modules as intermediary devices installed at fixed locations along the track and on vehicles. These modules communicate via radio frequency to provide location information in environments where GPS is unavailable, serving as a mediator between the vehicle and the tracking system.
Solution Approach 2:
The patent replaces the GPS satellite-based electromagnetic positioning system with an ground-based radio frequency transponder system. This substitution enables reliable location tracking in subterranean environments where satellite signals cannot penetrate.
2Reliability
If PTC system is implemented to control train movements, then safety is improved, but travel time increases and throughput decreases
Solution Approach 1:
The system enables vehicles to autonomously determine their own location, speed, and spacing by detecting transponders and exchanging information with other vehicles. This self-service capability reduces reliance on centralized control, allowing faster response times and maintaining higher throughput while ensuring safety.
Solution Approach 2:
The system implements continuous feedback loops where vehicles constantly monitor their position relative to other vehicles and automatically adjust speed and spacing. This real-time feedback enables safe operation without the delays associated with centralized PTC processing.
3Device complexity
If operator relies on visual inspection of control signals, then equipment cost is reduced, but collision risk increases due to operator failure to notice signals
Solution Approach 1:
The system provides automatic feedback to the operator through the user interface when a control signal is approaching or when spacing violations are detected. This automated alerting system complements visual inspection by providing timely warnings without requiring constant operator attention, thereby maintaining low equipment costs while improving collision prevention.
Solution Approach 2:
The patent replaces manual visual signal detection with an automated sensor-based detection system that uses transponders and radio frequency communication. This substitution eliminates human error in signal detection while keeping the system simple and cost-effective.
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
Ensures accurate vehicle spacing and adherence to control signals, reducing collisions by providing real-time alerts and automatic braking, even in GPS-degraded environments, enhancing safety and efficiency on rail tracks.
Implementation Method 1
detect a distance between the rail vehicle and the proximate vehicle and/or the signal control point based at least in part on the time it takes a signal to travel between the transponder sensor modules
Implementation Method 2
a radio frequency identification ('RFID') reader adapted to detect serialized RFID tags mounted at locations along a railroad
Data Source
AI summary
Systems and methods are provided for train operation control and enforcement. A vehicle mounted system for train control may include a vehicle mounted data radio mounted on a railway vehicle and a vehicle mounted controller. The vehicle mounted controller may be connected to the vehicle mounted data radio. The vehicle mounted data radio may be in wireless communication with a wayside reporting station, which may be in communication with a signal control point that is associated with a safety point that is further associated with an interlocking, and the vehicle mounted data radio may be configured to receive signal state status information from the wayside reporting station. The vehicle mounted controller may be configured to determine a distance between the railway vehicle and the safety point. The vehicle mounted data radio may be an ultra-wide band (UWB) radio.