Cooperative Train Anti-Collision Using Real-Time Distance Braking
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Solution Overview
Problem
Existing train collision prevention systems in cooperative formations are inadequate due to inaccurate line mark representation, leading to suboptimal speed limits and increased distances between trains, limiting operational capability.
Innovation Solution
An anti-collision method and apparatus that utilizes real-time distance measurement, electromagnetic braking, and communication between trains to determine optimal braking strategies based on actual train positions and speeds, employing sensors like laser radar and UWB, and communication methods like 5G and LiFi to ensure safe train operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the ATP calculates upper speed limit and speed limit line according to line mark information, then the train collision prevention function is provided, but the line mark cannot accurately represent the real position of the previous train, resulting in suboptimal speed limits and large distances between trains
Solution Approach 1:
The patent replaces the mechanical line mark-based positioning system with an electromagnetic sensing system. Electromagnetic sensors on the current train detect electromagnetic markers left by the previous train, enabling direct measurement of real distance and position without relying on pre-laid physical markers. This substitution provides accurate real-time position data that reflects the actual train locations.
Solution Approach 2:
The patent introduces electromagnetic markers as an intermediary between trains. These markers are laid by the previous train and detected by the current train, serving as a communication medium that carries position information. This intermediary enables indirect but accurate position measurement without requiring direct train-to-train communication or complex infrastructure.
2Reliability
If the ATP maintains large safety distances between trains based on suboptimal speed limits, then collision prevention is ensured, but the operation capability and efficiency are limited
Solution Approach 1:
The patent implements a feedback mechanism where the current train continuously detects the electromagnetic markers left by the previous train, obtaining real-time distance information. This feedback loop allows the system to dynamically adjust speed limits and braking strategies based on actual positions, maintaining safety while optimizing operational efficiency. The system responds to real conditions rather than relying on conservative fixed parameters.
Solution Approach 2:
The patent transitions from static, pre-calculated speed limits based on line marks to dynamic speed control based on real-time electromagnetic detection. The upper speed limit and speed limit line are continuously updated according to the detected position of the previous train, allowing the system to adapt to changing conditions and maintain optimal safety margins without excessive conservative buffers.
3Reliability
If the current train brakes based on suboptimal speed limit calculations, then collision is avoided, but the braking distance and operational efficiency are compromised
Solution Approach 1:
The patent enables preliminary braking action by detecting the electromagnetic markers of the previous train in advance. The current train receives position information before reaching the point where braking would be critically necessary, allowing for smoother, more timely deceleration. This advance notice optimizes the braking curve and reduces abrupt stops while maintaining safety.
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
Enhances operational capability by accurately determining braking maneuvers, reducing train collision risks, and minimizing distances between trains through precise distance and speed management.
Implementation Method 1
measuring the real-time distance between the current train and the previous adjacent train, wherein a method for measuring the real-time distance comprises at least one or both of laser radar and ultra wide band technology
Implementation Method 2
measuring the real-time distance between the current train and the previous adjacent train, wherein a method for measuring the real-time distance comprises at least one or both of laser radar and ultra wide band technology
Implementation Method 3
controlling, under a condition that the real-time distance is less than the preset minimum safety distance, the current train to perform electromagnetic braking
Data Source
AI summary
The embodiments of the present application disclose an anti-collision method and apparatus for trains in a cooperative formation. The anti-collision method includes: determining whether it is necessary to control the current train to brake; determining whether a real-time distance between the current train and a previous adjacent train in the same formation as the current train is greater than a preset minimum safety distance; controlling, under a condition that the real-time distance is less than the preset minimum safety distance, the current train to perform electromagnetic braking; and calculating, under a condition that the real-time distance is greater than the preset minimum safety distance, a real-time safety distance between the current train and the previous adjacent train, and controlling, under a condition that the real-time distance is less than the real-time safety distance, the current train to brake.