Rail Vehicle Data Transmission via Running Rail
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Solution Overview
Problem
Current communication methods in rail vehicle consists face challenges such as high costs for wireless communication and signal quality issues, and the impracticality of outfitting non-powered rail cars with electrical communication lines, which can lead to disconnection due to vibration.
Innovation Solution
The method involves transmitting data over a third rail or catenary line, monitoring these power supply conductors for data, and using router transceiver units to communicate data between rail vehicles through electrical or conductive pathways, including running rails, third rails, or catenary lines, while adapting to neutral sections by switching to auxiliary communication pathways.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If wireless communication is used for data transmission between rail vehicles, then communication flexibility is improved, but cost increases and signal quality deteriorates due to RF interference
Solution Approach 1:
The patent uses the running rail as an intermediary medium to transmit data signals between rail vehicles. Instead of direct wireless transmission between vehicles, the system modulates data onto electrical signals that travel through the rail infrastructure, which then couples inductively to receiving coils on the vehicles. This intermediary approach provides shielded, interference-free transmission while maintaining wireless convenience.
Solution Approach 2:
The patent replaces the wireless electromagnetic field-based communication system with an electrical signal transmission system through conductive rails. By substituting RF waves with electrical signals in a controlled conductive medium, the system eliminates susceptibility to RF interference while maintaining data transmission capability between moving rail vehicles.
2Reliability
If electrical communication lines are installed within rail vehicles for secure and noise-free communication, then signal quality is improved, but device complexity and cost increase due to the need to outfit all vehicles with built-in communication lines
Solution Approach 1:
The patent makes the running rail serve multiple functions: it continues to provide its primary function of guiding and supporting the train while simultaneously serving as a communication transmission medium. By modulating data signals onto the electrical current already flowing through the rails, the system adds communication capability to an existing infrastructure without requiring separate dedicated communication lines in each vehicle.
Solution Approach 2:
The rail communication system uses the existing electrical infrastructure of the railway to provide communication services. The power and signaling currents already present in the rails are utilized as the transmission medium for data, eliminating the need for separate communication infrastructure and reducing overall system complexity.
3Ease of manufacture
If detachable communication lines between adjacent cars are used, then ease of assembly is improved, but reliability deteriorates due to disconnection from vibration
Solution Approach 1:
The patent extracts the communication transmission function from the mechanical coupling between vehicles. Instead of relying on physical cables that must be connected and disconnected between cars, the system uses the continuously present rail infrastructure as the transmission medium, eliminating the vulnerability of detachable connections to vibration-induced disconnection.
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
This solution enables reliable and cost-effective data communication between rail vehicles, even across neutral sections, by utilizing existing power supply conductors and running rails, ensuring continuous communication and reducing the need for additional wiring.
Implementation Method 1
a router transceiver unit (228) positioned in each of the plurality of rail vehicles (204, 206) and electrically coupled with one of: a rail vehicle wheel set (208) to which a running rail (210) provides electrical coupling; or to an electric system (230) that receives electric power from a third rail (214) or other off-board power supply conductor (220)
Implementation Method 2
The interface module is configured to be electrically coupled to a running rail that guides and supports the rail vehicle in the consist as the consist travels along the running rail
Data Source
AI summary
A method for communicating data in a rail vehicle consist includes transmitting, at a first rail vehicle in the consist, first data over a running rail to a second, different rail vehicle in the consist, where the running rail guides and supports the rail vehicles of the consist as the rail vehicles travel along the running rail. The method also includes monitoring the running rail for second data and receiving the second data over the running rail for use by a first system onboard the first rail vehicle.