Polarized RF Rotary Joint for High-Speed Slip Ring Data
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Solution Overview
Problem
Conventional rotary joints face challenges such as short lifetimes, susceptibility to interference, complexity, and high costs due to the use of sliding contacts or complex non-contact methods, which limit their effectiveness in transmitting high-speed data across rotating interfaces.
Innovation Solution
A wireless communication rotary joint utilizing polarized RF signals with helical-shaped antennae configured for circular polarization, enabling reliable and cost-effective high-speed data transmission through a slip ring system with 60 GHz chipsets and Ethernet channels, avoiding the need for physical contact and minimizing assembly complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If conventional contact-type slip rings are used to transmit signals and power, then power and signal transmission is achieved, but the lifetime is limited due to frictional and arc wear
Solution Approach 1:
The patent replaces the mechanical contact-based signal and power transmission system with an inductive coupling system using magnetic fields. The transmitter and receiver coils enable wireless energy and data transfer across the rotary joint, eliminating mechanical wear while maintaining transmission capability. This substitution resolves the contradiction by removing the physical contact that causes wear and interference susceptibility.
Solution Approach 2:
The patent changes the transmission medium from electrical contact to electromagnetic induction by varying the operating parameters (frequency, coil geometry, magnetic coupling). By operating at optimized frequencies and using appropriately designed coil structures, the system achieves reliable power and signal transmission without mechanical contact, thereby extending lifetime while maintaining reliability.
2Productivity
If optical rotary joints are used for high-speed data transmission, then data transmission capability is improved, but the device complexity and installation difficulty increase
Solution Approach 1:
The patent replaces complex optical transmission systems with inductive coupling using magnetic fields. The transmitter and receiver coils provide a simpler mechanical and installation-friendly solution while achieving high-speed data transmission through electromagnetic induction, eliminating the need for precise optical alignment and specialized cables.
Solution Approach 2:
The inductive coupling system serves multiple functions simultaneously: it transmits power, data signals, and provides electrical isolation, all through the same magnetic coupling mechanism. This multi-functionality reduces device complexity compared to optical systems that require separate components for different transmission types.
3Reliability
If coaxial RF rotary joints are used for signal transmission, then signal integrity is maintained, but the manufacturing cost and assembly difficulty increase due to tight tolerances
Solution Approach 1:
The patent replaces precision mechanical coaxial RF joints with an inductive coupling system using magnetic fields. The coil-based transmitter and receiver provide electrical isolation and signal integrity without requiring tight mechanical tolerances, thereby simplifying manufacturing and assembly while maintaining reliable signal transmission.
4Power
If conventional slip rings with sliding contacts are used, then power and signal transmission is achieved, but the system becomes complex and expensive to maintain
Solution Approach 1:
The patent replaces mechanical sliding contacts with inductive coupling using magnetic fields. The wireless power and signal transmission through transmitter and receiver coils eliminates wear, sparks, and mechanical degradation, resulting in a system that is simpler and less expensive to maintain while fully preserving power transmission capability.
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 solution provides a reliable and cost-effective means to transmit large amounts of data across rotating interfaces with high bandwidth and reduced interference, improving the longevity and maintainability of the system.
Implementation Method 1
The first and second antennae are adapted to communicate with each other by at least partially using polarized signals
Implementation Method 2
The first and second antennae are adapted to communicate with each other by at least partially using polarized signals
Data Source
AI summary
A system and method for communicating signals through a slip ring. It includes a stator and a rotor configured to rotate relative to the stator about a rotation axis, the rotor having a first wireless module with a first antenna. The stator has a second wireless module with a second antenna. The first and second antennae are arranged along the rotation axis. The first and second antennae are adapted to communicate with each other by at least partially using polarized signals.