Oscillation Decoupling Supply Line for MRI Gradient Coils
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Solution Overview
Problem
Gradient coils in magnetic resonance devices experience unwanted oscillations and vibrations during operation, leading to defects such as cable fractures and overheating in supply lines, which existing technologies fail to adequately address.
Innovation Solution
A supply line apparatus with an oscillation decoupling unit, featuring conducting supply line elements made from materials like copper alloys or spring elements, is designed to suppress unwanted oscillations and vibrations, ensuring reduced wear and extended service life by absorbing mechanical energy and maintaining the coaxial cable oscillation-free.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If connection points of the supply line on the gradient coil are fixed as securely as possible to prevent detachment, then connection reliability is improved, but all oscillation energy is transmitted to the supply lines causing increased wear and potential fracture
Solution Approach 1:
A vibration decoupling unit is introduced as an intermediary component between the gradient coil and the supply line. This unit includes a vibration-absorbing element that is coupled to the supply line, acting as a mediator to absorb oscillation energy and prevent it from being transmitted to the supply line, thereby protecting the connection while maintaining reliability
Solution Approach 2:
The vibration-absorbing element in the decoupling unit converts the harmful oscillation energy into beneficial damping effects. By absorbing the vibration energy that would otherwise damage the supply line, the system transforms the problematic mechanical oscillations into a protective mechanism that extends supply line life
2Strength
If the supply line is made more flexible to reduce stress during oscillation, then wear is reduced, but electrical conductivity and structural integrity may be compromised
Solution Approach 1:
The supply line is constructed as a composite structure with multiple layers including an inner conductor, insulation layer, and an outer protective layer. This composite design allows the inner conductor to maintain electrical conductivity while the outer layers provide mechanical protection and flexibility to reduce wear during oscillation
Solution Approach 2:
The supply line incorporates flexible protective layers and coatings that allow the cable to bend and move with oscillations without compromising the inner conductor. The flexible outer structure absorbs mechanical stress while the inner conductor maintains its electrical integrity
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 oscillation decoupling unit effectively reduces wear on supply lines by suppressing unwanted oscillations and vibrations, preventing cable detachment and fractures, thereby extending the service life of the supply line apparatus and maintaining the coaxial cable in an oscillation-free state.
Implementation Method 1
The oscillation-suppressing supply line element may be formed from a copper alloy in order to achieve a high level of electrical conductivity in the oscillation-suppressing supply line element
Implementation Method 2
The at least one oscillation-suppressing supply line element is formed by a spring element
Data Source
AI summary
A supply line apparatus for an electrical connection of a gradient coil unit in a magnetic resonance device includes a first supply line unit and a second supply line unit. The second supply unit is disposed at least partially coaxially to the first supply line unit. The first supply line unit and/or the second supply line unit has at least one conducting supply line element. The supply line apparatus includes an oscillation decoupling unit that has at least one oscillation-suppressing supply line element.