Differential Coupler Layout for Lateral Deviation Tolerance
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Solution Overview
Problem
Existing wireless communication systems, particularly those involving differential couplers and transmission lines in rotating medical equipment or industrial robots, face challenges with communication quality due to lateral deviations between the rotating and fixed portions, leading to errors in data transmission.
Innovation Solution
A wireless communication system is designed with a first coupler having a first pair of electrodes and a second coupler with a second pair of electrodes, where the distance between the centroids of the first pair of electrodes differs from the distance between the centroids of the second pair of electrodes, allowing for improved resistance to lateral deviations through electromagnetic coupling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the signal conductors of the differential coupler and the differential transmission line are made to have the same size in cross-section and symmetrically oppose each other, then the electromagnetic coupling is maximized, but lateral deviation between the rotating portion and fixed portion causes significant changes in the differential signal and communication quality degradation
Solution Approach 1:
The patent applies asymmetry by making the distance between centroids of the first pair of electrodes differ from the distance between centroids of the second pair of electrodes. This asymmetric configuration creates a differential structure where signal conductors have different spacing relationships, which compensates for lateral deviations and maintains stable differential signal transmission even when the rotating portion shifts position relative to the fixed portion.
2Productivity
If the differential coupler is positioned sufficiently closely to the differential transmission line to receive signals through wireless coupling, then data transmission is enabled, but lateral deviation causes positional relationship changes and signal errors
Solution Approach 1:
The patent changes the geometric parameters of the electrode configuration by making the inter-centroid distances different between the two pairs of electrodes. This parameter modification creates a differential structure that is insensitive to lateral positional changes, allowing the system to maintain both close positioning for efficient wireless coupling and robustness against deviation-induced signal errors.
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 system effectively suppresses changes in differential signal voltage due to lateral deviations, enhancing communication quality and reducing errors in data transmission between rotating and fixed portions.
Implementation Method 1
a reception circuit configured to receive a differential signal output from the second coupler based on electromagnetic coupling between the first coupler and the second coupler
Data Source
AI summary
A wireless communication system includes a first coupler having a first pair of electrodes and second coupler having a second pair of electrodes that at least partially oppose the first pair of electrodes. A transmission circuit applies a differential signal to the first coupler. A reception circuit receives a differential signal output from the second coupler based on electromagnetic coupling between the first coupler and the second coupler. A distance between centroids of the first pair of electrodes differs from a distance between centroids of the second pair of electrodes.