Train Optical Fiber Ring Network for Low-Loss Carriage Communication
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Solution Overview
Problem
Conventional train communication systems require multiple networks and cables, leading to complex wiring, increased weight, and poor communication quality due to electromagnetic interference and data loss.
Innovation Solution
Implementing an optical fiber ring network connected to processors in train carriages, where carrier optical signals are determined and synthesized for train communication devices, reducing the need for multiple networks and cables.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple separate communication networks are established for different train communication devices, then communication quality is improved by avoiding bandwidth congestion, but device complexity increases due to complex wiring environment and increased train weight
Solution Approach 1:
The patent merges multiple separate communication networks into a single unified optical fiber ring network. Instead of establishing independent communication networks for different train communication devices (multimedia system, control system, monitoring system), the invention combines them all into one network using wavelength division multiplexing technology, where different wavelengths carry different types of communication data simultaneously.
Solution Approach 2:
The patent changes the transmission medium parameter from traditional electrical cables to optical fibers, and utilizes wavelength division as a new parameter to differentiate communication channels. By assigning different wavelengths to different communication devices or data types, the system achieves network separation without physical cable separation, thus improving communication quality while reducing wiring complexity.
2Reliability
If multiple separate communication networks are established for different train communication devices, then communication quality is improved by avoiding bandwidth congestion, but weight of moving object increases due to large number of cables
Solution Approach 1:
The patent merges multiple separate communication networks into a single unified optical fiber ring network. Instead of establishing independent communication networks for different train communication devices (multimedia system, control system, monitoring system), the invention combines them all into one network using wavelength division multiplexing technology, where different wavelengths carry different types of communication data simultaneously.
Solution Approach 2:
The patent replaces the traditional electrical cable-based communication system with an optical fiber-based system. This substitution eliminates the need for multiple heavy copper cable bundles by using lightweight optical fibers that can carry multiple communication channels simultaneously through wavelength division multiplexing, thus significantly reducing train weight while maintaining or improving communication quality.
3Ease of manufacture
If traditional cable-based communication networks are used in train, then ease of manufacture is improved, but communication quality deteriorates due to data loss and electromagnetic interference
Solution Approach 1:
The patent replaces the traditional electrical cable-based communication system with an optical fiber-based system. This substitution eliminates the need for multiple heavy copper cable bundles by using lightweight optical fibers that can carry multiple communication channels simultaneously through wavelength division multiplexing, thus significantly reducing train weight while maintaining or improving communication quality.
Solution Approach 2:
The patent changes the transmission medium parameter from traditional electrical cables to optical fibers, and utilizes wavelength division as a new parameter to differentiate communication channels. By assigning different wavelengths to different communication devices or data types, the system achieves network separation without physical cable separation, thus improving communication quality while reducing wiring complexity.
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
Improves communication quality by minimizing data loss and electromagnetic interference while simplifying wiring and reducing train weight.
Implementation Method 1
a processor in a carriage of a train is connected to an optical fiber ring network
Implementation Method 2
decomposing the first light beam into the carrier optical signals by performing wavelength division de-multiplexing
Implementation Method 3
synthesizing the feedback optical signal and all carrier optical signals not required by the train communication device to a second light beam by performing wavelength division multiplexing
Data Source
AI summary
A communication method, which relates to the field of optical fiber communications, is applied to a processor in any carriage of a train. The processor is connected to an optical fiber ring network, and the processor performs communication data interaction with a train communication device in a carriage, and then performs communication data interaction in an optical signal form with the optical fiber ring network, so as to implement communication between the train communication devices in different carriages.