Rotary Joint Wireless Probe Selection for High-Speed Data
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Solution Overview
Problem
Rotary joint devices, such as slip ring, optical, and RF rotary joints, face challenges with high maintenance costs, data transmission rate limitations, and reduced RF bandwidth due to friction, light modulation limitations, and antenna misalignments during relative rotation in electromechanical systems.
Innovation Solution
A device and method utilizing a first platform with a probe emitting wireless signals and a second platform with multiple probes in a circular arrangement, where a signal conditioner selects the optimal probe based on orientation to maintain communication reliability and bandwidth, even during rotation, using RF signals above 3 GHz for high-speed data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single antenna is used for RF wireless communication between rotating structures, then the device complexity is reduced, but the data transmission rate and reliability deteriorate due to polarization mismatches and beamforming variations caused by relative rotation
Solution Approach 1:
The patent divides the antenna system into multiple segments: multiple transmit antennas on the first platform and multiple receive antennas on the second platform. This segmentation allows the system to maintain multiple potential communication paths despite relative rotation, thereby maintaining high data transmission rates and reliability without requiring a complex centralized antenna structure.
Solution Approach 2:
The patent transitions from a single-point antenna interaction to a distributed array of antennas across two dimensions. By arranging multiple antennas in spatial distribution on both platforms, the system creates additional spatial dimensions for signal transmission, enabling the selection of optimal antenna pairs that maintain alignment despite rotational movement.
2Reliability
If multiple probes are used in a circular arrangement to maintain communication during rotation, then the communication reliability and bandwidth are improved, but the device complexity increases
Solution Approach 1:
The patent segments the communication function across multiple probes arranged in a circular pattern on the second platform. Each probe can independently communicate with the rotating probe, providing redundant communication paths. This segmentation distributes the reliability burden across multiple simpler components rather than requiring a single complex system.
Solution Approach 2:
The patent implements a dynamic probe selection mechanism where the system continuously identifies and activates the most suitable probe pair based on current rotational position and signal quality. This dynamic adaptation allows the system to maintain optimal communication without requiring all probes to be simultaneously active, thereby managing complexity while preserving reliability.
3Adaptability or versatility
If the first platform rotates relative to the second platform, then the operational versatility is improved, but the RF bandwidth and signal quality deteriorate due to changing antenna orientations and distances
Solution Approach 1:
The patent employs dynamic probe selection that adapts to the rotational state of the first platform. As rotation changes the relative positions and orientations of antennas, the system dynamically identifies the probe pair with optimal alignment and signal characteristics, thereby maintaining signal quality throughout the rotational range of motion.
Solution Approach 2:
The patent implements a feedback mechanism where the system monitors signal quality metrics from multiple probe pairs and uses this information to select the optimal communication path. This feedback loop continuously adjusts the active probe configuration based on real-time rotational position and signal conditions, maintaining reliable communication despite platform rotation.
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 enhances communication reliability and bandwidth by dynamically selecting the best probe for alignment and signal strength, overcoming traditional rotary joint limitations and enabling continuous high-speed data transmission in electromechanical systems.
Implementation Method 1
a probe mounted to the first platform and configured to emit a wireless signal for propagation toward the second side of the second platform
Implementation Method 2
the signal conditioner is configured to use the selected probe for receiving the wireless signal emitted by the probe of the first platform
Data Source
Figure 1A
Figure 1B
Figure 1C
AI summary
A device is provided that includes a first platform having a first side, and a second platform having a second side positioned within a predetermined distance to the first side. The device also includes an actuator configured to cause a relative rotation between the first platform and the second platform such that the first side of the first platform remains within the predetermined distance to the second side of the second platform. The device also includes a probe mounted to the first platform, and a plurality of probes mounted to the second platform. The device also includes a signal conditioner coupled to the plurality of probes. The signal conditioner may select one of the plurality of probes based on an orientation of the first platform relative to the second platform. The signal conditioner may then to use the selected probe for wireless communication with the probe on the first platform.