Near Field Communication Coupler Gain Control for CT Rotating Parts
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Solution Overview
Problem
In X-ray Computed Tomography (CT) systems, wireless communication based on electromagnetic field coupling between the rotating and fixed parts faces challenges due to signal attenuation and external noise, leading to communication errors, especially when the short coupler is positioned at the terminal part, causing high-frequency signal attenuation and potential communication failures.
Innovation Solution
The near field communication system employs signal processing units to vary the gain for each frequency of the signal transmitted and received between long and short couplers, based on the position of the short coupler, using emphasis and equalization processes to correct signal attenuation and maintain signal quality, regardless of the coupler positions and frequencies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If wireless communication based on electromagnetic field coupling is used between rotating and fixed parts, then data transmission is enabled without physical connections, but signal attenuation and external noise cause communication errors
Solution Approach 1:
The patent introduces a near field communication system as an intermediary mechanism between the rotating and fixed parts. This system uses electromagnetic field coupling through specifically designed couplers (transmitter in rotating part, receiver in fixed part) to enable reliable wireless data transmission, thereby solving the contradiction between ease of operation and communication reliability
Solution Approach 2:
The patent employs signal processing techniques that dynamically adjust parameters such as gain and frequency characteristics of the electromagnetic signals. By changing these parameters adaptively, the system maintains reliable communication despite signal attenuation and noise interference, resolving the contradiction between wireless operation and communication stability
2Device complexity
If the short coupler is positioned at the terminal part, then device structure is simplified, but high-frequency signal attenuation increases causing communication failures
Solution Approach 1:
The patent applies signal processing units that dynamically adjust the gain and frequency characteristics of transmitted and received signals. By changing these parameters adaptively based on the coupler position, the system compensates for high-frequency signal attenuation when the short coupler is at the terminal part, maintaining communication reliability without increasing structural complexity
Solution Approach 2:
The system incorporates feedback mechanisms where the receiver detects signal quality and communicates back to the transmitter, which then adjusts its output parameters accordingly. This feedback loop ensures that signal attenuation is compensated in real-time, maintaining reliable communication regardless of coupler positioning
3Reliability
If gain is increased to compensate for signal attenuation, then signal quality improves, but external noise interference also increases
Solution Approach 1:
The patent employs signal processing units that selectively adjust gain for different frequency components of the signal. By applying frequency-dependent gain adjustment rather than uniform amplification, the system improves signal quality while minimizing the amplification of external noise, thus resolving the contradiction between signal quality and noise interference
Solution Approach 2:
The system applies different processing characteristics to different parts of the signal spectrum. By tailoring the gain and filtering characteristics to specific frequency bands, the system enhances the desired signal components while suppressing noise, achieving improved signal quality without proportionally increasing noise interference
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 approach effectively improves the quality of wireless communication by preventing communication errors and maintaining signal integrity across varying positions and frequencies, ensuring reliable data transmission in both downlink and uplink directions.
Implementation Method 1
wireless communication technique based on the electromagnetic field coupling
Data Source
AI summary
A near field communication system according to an embodiment includes: a long coupler provided for a first device; a short coupler provided for a second device and configured to perform wireless communication based on electromagnetic field coupling, with the long coupler; and signal processing circuitry configured to vary gain for each of various frequencies of a signal transmitted and received between the long coupler and the short coupler, in accordance with the position of the short coupler with respect to the long coupler.