Aircraft Tire Pressure Loop Link 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, particularly due to the use of unreliable electrical connections and wires that can break in harsh environments, and the need for cost-effective and simplified designs that avoid signal interference.
Innovation Solution
An aircraft tire pressure loop link is developed using a rigid primary single metal loop connected by spaced apart electrically conductive arms to a secondary single metal loop, which couples a magnetic field between the wheel hub coil and the tire pressure sensor coil without electrical connections, utilizing low permeable metals like aluminum or titanium to ensure reliable and efficient communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electrical connections and wires are used to communicate between the wheel hub and tire pressure sensor, then communication can be established, but the system becomes unreliable and prone to breaking in harsh airplane wheel environments
Solution Approach 1:
The patent replaces the mechanical electrical connection system with a magnetic field-based wireless communication system. The primary coil in the wheel hub generates a magnetic field that couples with the secondary coil in the tire pressure sensor, eliminating the need for physical electrical connections and wires that are prone to breaking in harsh environments.
Solution Approach 2:
The patent introduces a magnetic field as an intermediary medium to transfer energy and data between the wheel hub and tire pressure sensor. The magnetic field acts as a non-contact mediator that enables communication without direct electrical contact, improving reliability in harsh conditions.
2Reliability
If transformer coils are used to communicate between wheel hub and tire pressure sensor, then magnetic coupling can be achieved, but the system requires complex electrical connections and wiring
Solution Approach 1:
The patent replaces the complex electrical connection system with a simplified magnetic coupling system using primary and secondary coils. The magnetic field directly couples the two coils wirelessly, eliminating the need for additional electrical connections and wiring while maintaining reliable communication.
3Reliability
If open loop coil with capacitor is used to extend communication range, then electromagnetic coupling can be achieved, but stray magnetic flux induces electromotive force that interferes with desired signals
Solution Approach 1:
The patent converts the potentially harmful stray magnetic flux into a beneficial element by using it to induce current in the primary coil that reinforces the desired signal. The system is designed to utilize the magnetic flux that would otherwise be interference, transforming it into a useful component of the communication signal.
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 simplified method for communicating tire pressure data without electrical connections, reducing signal interference and enhancing the robustness of the system to withstand harsh environments, while maintaining a non-contact design for increased durability.
Implementation Method 1
a primary coil in the wheel hub generates a magnetic field that couples to a secondary coil in the tire pressure sensor
Implementation Method 2
couples a magnetic field between the wheel hub coil and the tire pressure sensor coil
Data Source
Figure 1
Figure 2A~2B
Figure 3
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.