Fire-Resistant RF Wire Assembly for High-Temperature Signal Integrity
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Solution Overview
Problem
Existing wireless radio communication systems in buildings fail due to high temperatures during structural fires, causing disruptions in emergency communication coordination.
Innovation Solution
A dual wire assembly system using high-temperature resistant materials like copper, steel, or metallic alloys, with separator nodes made from furnace concrete or low coefficient of expansion glass, and a mechanical assembly that maintains wire tension and separation to ensure continuous operation under extreme heat.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing RF cables and antennas are used to carry high frequency signals, then communication quality is maintained, but they cannot withstand intense temperatures and lose their ability to transport and radiate the radio frequency signal
Solution Approach 1:
The patent employs composite materials throughout the RF system components. The transmission line uses a polytetrafluoroethylene (PTFE) insulator combined with copper conductors, while the antenna integrates PTFE with metal elements. The connector assembly combines PTFE insulation with metal contacts and housing. This composite material strategy enables the system to simultaneously achieve high-temperature resistance (maintaining functionality at 1850°F for 2 hours) and high-frequency signal carrying capability, resolving the contradiction between temperature resistance and signal transmission performance.
Solution Approach 2:
The patent utilizes the thermal properties of PTFE, which maintains its dielectric characteristics and structural integrity at high temperatures where conventional materials would fail. By selecting materials with specific thermal parameter profiles (PTFE's stable dielectric constant and melting point above 1850°F), the system maintains its electrical parameters (impedance, signal transmission) even under extreme thermal conditions, thus achieving both temperature resistance and signal carrying capability.
2Reliability
If existing RF cables and antennas are designed for high frequency signals, then communication quality is improved, but they fail due to high temperatures during structural fires
Solution Approach 1:
The patent employs composite materials throughout the RF system components. The transmission line uses a polytetrafluoroethylene (PTFE) insulator combined with copper conductors, while the antenna integrates PTFE with metal elements. The connector assembly combines PTFE insulation with metal contacts and housing. This composite material strategy enables the system to simultaneously achieve high-temperature resistance (maintaining functionality at 1850°F for 2 hours) and high-frequency signal carrying capability, resolving the contradiction between temperature resistance and signal transmission performance.
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
The system effectively maintains communication integrity by withstanding high temperatures and ensuring the reliability of radio frequency signals during fires, thereby supporting emergency response activities.
Implementation Method 1
The at least one separator node can be formed from at least one of furnace concrete, low coefficient of expansion glass, or silica cement. As used in this context, the term 'low coefficient of expansion' with respect to a glass material means a material that has a low expansion and contraction response over a wide temperature range.
Implementation Method 2
The first and second wires can be formed from at least one of copper, steel, copper coated steel, or a metallic alloy. The dual wire assembly is configured to transmit radio frequency signals.
Data Source
AI summary
A fire-resistant in-building wireless communication system designed to maintain functionality under extreme conditions, including temperatures exceeding 1850° F. and water spray exposure. The system includes a dual wire assembly comprising a first and second wire separated by a predetermined distance to transmit radio frequency (RF) signals. The wires are formed from high-temperature resistant materials, such as copper or metallic alloys, and are secured by separator nodes made of fireproof materials like furnace cement or silica cement. The system includes a high-temperature resistant antenna for RF signal radiation, supported by an antenna support node, and tensioned via pivot nodes equipped with adjustable mechanisms. The assembly is further encapsulated by a fire-resistant wire wrap to prevent electrical shorts and interference.