Rotary Link Inductive Data Transfer for Noisy Gap Communication
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing sensing devices in vehicles, such as LIDAR devices, face challenges in reliably transmitting data and power wirelessly across gaps between rotating and stationary portions, especially in noisy environments.
Innovation Solution
The implementation of a wireless data transformer and a wireless power transformer using inductively coupled conductive structures across the gap, allowing for high-rate data transmission and power delivery with error correction and modulation techniques.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If wireless data transmission is implemented across the gap using inductive coupling, then data transmission capability is enabled, but transmission reliability deteriorates in noisy environments
Solution Approach 1:
The patent introduces an intermediary communication interface that performs error correction encoding on data before transmission across the gap. This intermediary processing layer protects against noise-induced errors by adding redundancy (error correction codes) to the data stream, allowing the receiving end to detect and correct errors without retransmission, thereby maintaining reliability while enabling wireless transmission capability.
2Productivity
If high data rate transmission is implemented across the gap, then productivity is improved, but signal integrity deteriorates due to noise
Solution Approach 1:
The patent applies preliminary error correction encoding to the data stream before modulation and transmission across the gap. By pre-processing the data with error correction codes (such as forward error correction), the system prepares the signal to withstand noise interference at high transmission rates, ensuring that even if some bits are corrupted during high-speed transmission, the original data can be accurately reconstructed.
3Ease of operation
If the rotating portion is spaced apart from the stationary portion to facilitate rotation, then ease of operation is improved, but power transmission efficiency deteriorates
Solution Approach 1:
The patent employs wireless power transmission via inductive coupling between conductive structures on opposite sides of the gap. By transforming the power transmission medium from direct physical contact to electromagnetic field coupling, the system maintains energy transfer efficiency despite the gap required for rotation. The inductive coupling parameter allows power to be transmitted through the gap without mechanical contact, minimizing energy loss while preserving rotational freedom.
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
Enables reliable and efficient wireless data transmission and power delivery across the gap, even in noisy environments, thereby supporting the operation of rotating sensing devices in vehicles.
Implementation Method 1
The first and second conductive structures are inductively coupled together across the gap
Data Source
AI summary
A sensing device includes a stationary portion and a rotating portion. The rotating portion is spaced apart from the stationary portion by a gap and is configured to rotate relative to the stationary portion. The rotating portion includes one or more sensors that generate data. A communication interface in the rotating portion is configured to encode the data with error correction codes to provide encoded data, modulate a radio frequency (RF) signal that includes a plurality of sub-carriers with the encoded data to provide a data-modulated RF signal (e.g., an orthogonal frequency-division multiplexing (OFDM) signal), and transmit the data-modulated RF signal to the stationary portion via a wireless data transformer. The wireless data transformer includes a first conductive structure in the stationary portion and a second conductive structure in the rotating portion. The first and second conductive structures are inductively coupled together across the gap.