RF Coil Wireless Power via Magnetic Resonance
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Solution Overview
Problem
Current MRI systems face challenges in efficiently transmitting electric power to RF coil devices due to limitations in radio communication methods, leading to battery depletion during prolonged pulse sequences, necessitating frequent battery replacements.
Innovation Solution
The implementation of magnetically coupled resonant type wireless power transfer, where the resonance frequencies of antenna circuits on the power transmission and reception sides are synchronized, allowing for effective wireless transmission of electric power to RF coil devices, enabling them to operate continuously without battery depletion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If wireless power transfer is implemented to enable continuous operation of RF coil devices, then battery depletion is prevented and operational continuity is improved, but the system complexity increases due to the need for resonant frequency synchronization and magnetic coupling mechanisms
Solution Approach 1:
The patent introduces a magnetic coupling field as an intermediary between the power transmission coil and the antenna circuit. This magnetic field serves as the mediator that transfers power wirelessly through resonant frequency synchronization, enabling continuous operation without direct electrical connection or battery replacement
Solution Approach 2:
The patent utilizes resonant frequency synchronization as a key parameter change mechanism. By tuning both the power transmission coil and the antenna circuit to the same resonant frequency, the system achieves efficient wireless power transfer, preventing battery depletion while maintaining operational continuity
2Loss of energy
If resonant frequency synchronization is implemented for effective wireless power transmission, then power transfer efficiency is improved, but the difficulty of detecting and measuring resonance frequencies increases
Solution Approach 1:
The patent implements feedback mechanisms to detect and measure resonance frequencies. The system monitors the resonant conditions of both the power transmission coil and antenna circuit, adjusting frequencies to maintain synchronization and maximize power transfer efficiency while minimizing energy loss
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 solution allows for reliable and continuous operation of RF coil devices by wirelessly transmitting electric power, reducing the need for frequent battery replacements and enhancing the convenience of RF coil device placement by enabling remote power transmission.
Implementation Method 1
The antenna circuits are of the magnetically coupled resonant type, and resonance frequencies of the antenna circuits on the power transmission and reception sides are synchronized so as to enable effective transmission of electric power wirelessly
Data Source
AI summary
According to one embodiment, an MRI apparatus includes a power transmitting unit a signal receiving unit and an image reconstruction unit. The power transmitting unit wirelessly transmits electric power to an RF coil device by magnetically coupled resonant type wireless power transfer. The signal receiving unit wirelessly receives a digitized nuclear magnetic resonance signal wirelessly transmitted from the RF coil device. The image reconstruction unit obtains a nuclear magnetic resonance signal received by the signal receiving unit, and reconstructs image data of an object on the basis of the nuclear magnetic resonance signal.