Rail Section Monitoring via Impedance Segmentation
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Solution Overview
Problem
Current methods for monitoring rail vehicle positions and occupancy in track sections are complex, sensitive to environmental factors, and require significant effort, leading to unreliable data and security risks, while also failing to efficiently utilize rail network capacity.
Innovation Solution
A method and device that use interrogation signals coupled into track sections via coupling points, with response modules between rail sections to determine occupancy status, allowing for high-resolution tracking of vehicle positions, compositions, and speeds without requiring communication with rail vehicles, and is compatible with existing security systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If track circuits are used to monitor occupancy by measuring resistance difference between rails, then occupancy detection is achieved, but measurement reliability deteriorates due to environmental factors such as bedding resistance, atmospheric conditions, and dirt accumulation
Solution Approach 1:
The patent introduces an intermediary measurement system that uses a coupling point to inject measurement signals into the track section and a receiving device to detect the response signals. This intermediary system measures the impedance of the track section directly, bypassing the need to rely on rail-to-rail resistance differences that are susceptible to environmental factors like bedding resistance and atmospheric conditions.
2Measurement precision
If radio location methods are used to determine vehicle position, then position data precision is improved, but system complexity and security risks increase
Solution Approach 1:
The patent employs the track section itself as the measurement medium. By injecting signals through the coupling point and measuring the impedance changes through the existing rail infrastructure, the system uses the track's own electrical properties to detect vehicle presence and position, eliminating the need for separate radio communication systems, transponders, or satellites.
3Productivity
If high-resolution tracking of vehicle positions is implemented to improve rail network utilization, then productivity increases, but measurement and tracking effort deteriorates due to temporary position storage requirements
Solution Approach 1:
The patent divides the track section into multiple segments by placing multiple coupling points at different locations. Each coupling point can independently measure impedance in its local segment, allowing the system to determine vehicle position by identifying which segment shows the impedance change. This segmentation eliminates the need for continuous tracking and temporary position storage while providing high-resolution position information.
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 efficient and safe use of rail network resources, reduces energy consumption, and detects manipulations or defects, ensuring accurate occupancy data and system integrity with minimal equipment and effort.
Implementation Method 1
the impedance of the at least one track section is determined. The track section is divided into one or more sectors, in each of which at least one response module is connected to the two rail sections or is arranged between them
Data Source
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AI summary
The method involves dividing a track section (nminus1,n,nplus1) in one or more sectors (S1 to Sz), where a response module is connected or interposed between two rail sections (An,Bn). The response module changes individually by signals supplied from a measuring device. The measuring device checks the change of signals or individual response signals, and assigns a corresponding allocation status. The measuring device (10n,10nplus1) is designed as a transmitting unit (11) which emits an interrogation signal in the form of a temporarily applied direct current voltage. An independent claim is included for a system for monitoring a track section, on which rail vehicles, such as passenger trains and freight trains are associated.