Aircraft Tire Pressure Loop Link for Wireless Coupling
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Solution Overview
Problem
Existing aircraft tire pressure monitoring systems face challenges in reliably communicating between a wheel hub and a tire pressure sensor located on the rim, due to the use of unreliable electrical connections and wires that can break in harsh environments, and the need for high-cost, complex magnetic flux links to achieve sufficient magnetic field strength for signal transmission.
Innovation Solution
The aircraft tire pressure loop link uses a rigid single metal loop with spaced apart conductive connecting arms to electromagnetically couple the magnetic field between a wheel hub coil and a tire pressure sensor coil, eliminating the need for electrical connections and wires, and utilizing a magnetic flux collector to enhance flux coupling over distance without requiring permeable materials across the entire distance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If transformer coils with wire connections are used to communicate between wheel hub and tire pressure sensor, then electrical connection is established, but the system becomes unreliable and prone to breaking in harsh airplane wheel environment
Solution Approach 1:
The patent replaces the mechanical wire connection system with an electromagnetic field-based communication system. Two coils (primary coil in wheel hub, secondary coil in tire pressure sensor) establish magnetic coupling to transmit power and data without physical wire connections, eliminating the reliability issues of wire breaking in harsh environments.
Solution Approach 2:
The patent introduces a magnetic flux link as an intermediary between the primary and secondary coils. This flux link enhances the magnetic coupling efficiency, allowing reliable power and data transmission across the air gap without direct electrical contact, thus improving reliability while managing the complexity of the electromagnetic coupling system.
2Reliability
If magnetic flux link is used to enhance magnetic coupling between coils, then signal transmission is improved, but the device becomes high-cost and complex
Solution Approach 1:
The patent applies magnetic flux link material with specific local properties (high magnetic permeability) only in the critical region where magnetic coupling is needed between the coils. This localized application of specialized material enhances signal transmission reliability without requiring the entire system to be complex, balancing performance with manageable device complexity.
3Length of stationary object
If open loop coil with capacitor is used to extend RF antenna range, then communication range is extended, but electromagnetic interference is generated by induced electromotive force
Solution Approach 1:
The patent replaces the RF electromagnetic wave-based communication system with a magnetic coupling system using coils and magnetic flux links. This substitution allows for controlled magnetic field coupling that extends effective communication range while avoiding the electromagnetic interference problems associated with RF systems in the presence of stray magnetic flux.
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 provides a reliable, cost-effective, and simpler method for communicating tire pressure data without signal interference, using a non-contact magnetic field coupling that can withstand harsh environments and maintain signal strength over significant distances without the need for electrical connections.
Implementation Method 1
an aircraft tire pressure loop link for electromagnetically coupling a magnetic field between a wheel hub coil and a tire pressure sensor coil
Implementation Method 2
utilizing a magnetic flux collector to enhance flux coupling over distance without requiring permeable materials across the entire distance
Data Source
AI summary
The aircraft tire pressure loop link is formed of first and second single metal loops connected by parallel spaced apart metal shafts, and provides for coupling a magnetic field between a wheel hub coil and a tire pressure sensor coil to provide electromagnetic communication between a control unit connect to the wheel hub coil and a tire pressure sensor connected to the tire pressure sensor coil. The current induced in the first single metal loop travels the distance from the edge of the wheel axle coil to the periphery of the of the wheel rim to the second single metal loop, which generates the flux in the tire pressure sensor receiver coil necessary to power the tire pressure sensor.