Capacitive Coupling for Aircraft Data Transmission
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Solution Overview
Problem
Aircraft data transmission systems face challenges due to the high cost and weight of electrical cables, as well as the complexity of connection harnesses, which existing technologies have not adequately addressed, particularly in meeting deterministic standards required for aviation applications.
Innovation Solution
The solution involves using capacitive coupling components to transmit both power and data on the same communication link via a modulated carrier wave, reducing the number of electrical wires and simplifying connections, with the ability to work with any protocol and limited by the type of cable used.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate power transmission system and data transmission system are used, then reliability is improved, but device complexity and weight increase
Solution Approach 1:
The patent combines power transmission and data transmission into a single integrated system using one cable that carries both power and modulated data signals. This merging eliminates the need for separate power and data cables, reducing overall system complexity and weight while maintaining functional independence through signal modulation techniques.
Solution Approach 2:
The transmission cable is designed to serve multiple functions simultaneously: it acts as both a power delivery medium and a data communication channel. By modulating data onto the power signal, the same physical infrastructure supports both energy transfer and information transfer, making the system more versatile and reducing component count.
2Reliability
If separate power transmission system and data transmission system are used, then reliability is improved, but weight increases
Solution Approach 1:
The patent combines power transmission and data transmission into a single integrated system using one cable that carries both power and modulated data signals. This merging eliminates the need for separate power and data cables, reducing overall system complexity and weight while maintaining functional independence through signal modulation techniques.
3Device complexity
If domestic data transmission over power lines is used, then cable reduction is achieved, but deterministic performance deteriorates
Solution Approach 1:
The patent employs periodic modulation of the power signal to encode data transmission. By using structured periodic waveforms and modulation schemes, the system achieves deterministic timing and signal characteristics that meet aviation reliability standards, unlike unstructured domestic power line communication approaches.
Solution Approach 2:
The system dynamically adjusts signal parameters such as modulation frequency, amplitude, and timing to optimize performance for deterministic communication over the power line. These controlled parameter changes enable reliable data transmission while maintaining power delivery functionality.
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 approach significantly reduces the number and weight of electrical cables in aircraft, simplifies electrical connections, and ensures reliable data transmission while maintaining power transmission capabilities, meeting aviation standards.
Implementation Method 1
at least one capacitive coupling component connected between the input of the receiver and the connection point, said capacitive coupling component being suitable for transmitting the modulated carrier wave and for blocking the transmission of the supply voltage
Data Source
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AI summary
The invention relates to a transmission device (46) comprising: - an oscillator (54) capable of generating at least one carrier wave; - a transmitter (56) comprising: • at least one input (62) connected to the oscillator (54), • an activation input (64) capable of receiving a signal representing data to be transmitted, and • at least one output (66) capable of generating a carrier wave modulated by the signal representing the data to be transmitted; - a communication link (50) connected to the output of the transmitter; - a power line (70) connected to the communication link (50) at a connection point (74); and - a capacitive coupling component (82) connected between the output of the transmitter and the connection point (74). The invention also relates to a receiving device and a transmission system.