Segmented Leaky Coaxial Cable for Longer Low-Power Coverage
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Solution Overview
Problem
Leaky coaxial cables used in environments like coal mines have limited coverage distance due to restricted input power for safety reasons, necessitating a solution that extends coverage without increasing power consumption.
Innovation Solution
The design of a leaky coaxial cable with alternately arranged perforated and non-perforated segments, where the perforated segments have consistent spacings between leak holes, allowing for efficient electromagnetic wave propagation over longer distances at lower power input.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If the input power of the leaky coaxial cable is increased to extend coverage distance, then the coverage distance is improved, but security requirements cannot be met due to excessive power in hazardous environments
Solution Approach 1:
The outer conductor is divided into multiple perforated segments with different numbers of leak holes, creating distinct radiation zones. This segmentation allows the cable to achieve extended coverage distance through optimized signal distribution without requiring excessively high input power, as each segment contributes to the overall coverage in a controlled manner suitable for hazardous environments.
2Length of stationary object
If the outer conductor is divided into multiple perforated segments with different leak hole configurations, then the coverage distance is extended, but the device complexity increases
Solution Approach 1:
The outer conductor is divided into multiple perforated segments with different numbers of leak holes, creating distinct radiation zones. This segmentation allows the cable to achieve extended coverage distance through optimized signal distribution without requiring excessively high input power, as each segment contributes to the overall coverage in a controlled manner suitable for hazardous environments.
Solution Approach 2:
Different perforated segments are configured with different numbers of leak holes to create varying radiation characteristics along the cable length. This local differentiation optimizes signal distribution for extended coverage while maintaining a relatively simple overall structure that can be manufactured using standard processes.
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 configuration enables a leaky coaxial cable with extended coverage distance while maintaining low input power, meeting cost and processing efficiency requirements, and is applicable in challenging environments like coal mines and subways.
Implementation Method 1
When an electromagnetic wave is transmitted in the leaky coaxial cable, the electromagnetic wave is propagated outwards through a plurality of leak holes opened on the outer conductor
Data Source
AI summary
Embodiments of this application provide a leaky coaxial cable and a communication system. The leaky cable includes: an inner conductor, an insulation layer, and an outer conductor, where the insulation layer is configured to separate the inner conductor from the outer conductor; and the outer conductor includes M perforated segments and N non-perforated segments, the M perforated segments and the N non-perforated segments are alternately arranged, at least one of the M perforated segments includes at least three leak holes, spacings between leak holes in each of the at least one perforated segment are the same, and M and N are positive integers greater than or equal to 1.