Rotary Joint RF Link Using Polarization for Full-Duplex Data
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Solution Overview
Problem
Current wireless data transfer technologies face challenges in maintaining continuous and full-duplex communication in rotary joints, particularly in industrial settings where high-speed, reliable, and interference-resistant solutions are required, especially at high rotational speeds and in environments prone to contamination.
Innovation Solution
The implementation of a RF system using mm-wave communication links with elliptically polarized antennas and a diplexer configuration, enabling full-duplex wireless data transfer by separating RX and TX channels through frequency separation and orthogonal polarizations, ensuring efficient data transfer even during rotation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If optical signals are used for data transfer between rotating components, then high-speed data transfer is achieved, but precise alignment of narrow optical beams is required and the system is easily affected by contamination
Solution Approach 1:
The patent replaces optical signals with radio frequency electromagnetic waves for wireless data transmission between rotating components. This substitution eliminates the need for precise mechanical alignment of narrow beams and removes sensitivity to contamination, while maintaining high-speed data transfer capability through RF communication channels.
Solution Approach 2:
The patent changes the physical parameter of the transmission medium from optical frequency to radio frequency range. This parameter change allows the system to operate without precise alignment requirements and becomes resistant to contamination, while still achieving high-speed wireless data transfer through the modified electromagnetic wave properties.
2Productivity
If full-duplex data transmission is implemented in a rotary joint, then continuous two-way communication is achieved, but ensuring continuous transmission during rotation is challenging
Solution Approach 1:
The patent segments the RF spectrum into different frequency channels for separate transmit and receive operations. This frequency division allows simultaneous two-way communication without interference, enabling continuous full-duplex transmission even during rotation of the joint components.
Solution Approach 2:
The patent implements continuous wireless RF transmission that maintains uninterrupted data flow during rotation. The system eliminates gaps or interruptions in communication by using omnidirectional or trackable RF signals that continuously transmit and receive data throughout the entire rotational cycle, ensuring uninterrupted full-duplex operation.
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, high-speed, and interference-resistant wireless data transfer solution for rotary joints, capable of maintaining error-free data transmission with low bit error rates and compatibility with power transmission, suitable for industrial applications with high rotational speeds and harsh environments.
Implementation Method 1
separating RX and TX channels through frequency separation and orthogonal polarizations
Implementation Method 2
separating RX and TX channels through frequency separation and orthogonal polarizations
Data Source
AI summary
RF systems configured to implement full-duplex wireless data transfer for rotary joints are disclosed. An example RF system includes a 60 GHz short distance communication link implemented using elliptically (e.g., circularly) polarized antennas. Such a system may provide a mm-wave, high-speed, wideband wireless communication link in a manner that is associated with simpler design and operation, mechanical integrity, and reduced power consumption, compared to alternative solutions.