Magnetic Sensor Array for Implant Coil Positioning
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Solution Overview
Problem
Current systems for wireless power transmission to implanted medical devices face challenges in accurately determining the position of implanted coils and achieving optimal coupling, as existing imaging methods are inadequate and user interfaces are ineffective, leading to inefficient and time-consuming alignment processes.
Innovation Solution
A system utilizing a magnetic sensor array to measure and calculate the position of implanted magnetic coils within a subject, combined with a user interface that visually displays the coupling degree between external and implanted coils, facilitating precise alignment and efficient power transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional imaging systems (ultrasound, X-ray) are used to locate implanted coils, then some positioning information can be obtained, but the measurement precision and accuracy are insufficient due to algorithm confusion and operator dependency
Solution Approach 1:
The patent introduces magnetic sensors as an intermediary detection mechanism between the implanted coils and the imaging system. These sensors directly detect the magnetic field signatures of the implanted coils, providing precise position information without relying on conventional imaging algorithms that are confused by high-density materials. The magnetic sensors act as a mediator that translates the magnetic field information into accurate spatial coordinates.
Solution Approach 2:
The patent replaces the mechanical/optical imaging systems (ultrasound probes, X-ray equipment) with a magnetic field-based detection system. Instead of using sound waves or electromagnetic radiation to image the implant, the system uses magnetic sensors to detect the magnetic field generated by the implanted coils, substituting a more suitable physical principle for the specific measurement task.
2Productivity
If physical alignment of external and implanted coils is performed manually, then coupling can be achieved, but the process is time-consuming and difficult to optimize for maximum power transfer
Solution Approach 1:
The patent implements a feedback mechanism where magnetic sensors continuously monitor the position and coupling status of the external and implanted coils. This real-time feedback information is used to guide the alignment process, allowing the system to automatically adjust or provide precise guidance for achieving optimal coupling. The feedback loop enables both rapid alignment and precise optimization of power transfer efficiency.
Solution Approach 2:
The system enables self-alignment capabilities through automated detection and guidance based on magnetic field measurements. The magnetic sensors and processing system can automatically determine the optimal positioning without requiring manual trial-and-error adjustment, allowing the alignment process to serve itself through intelligent control rather than human intervention.
3Power
If transcutaneous power cable is used to supply power to implanted device, then adequate power can be delivered, but quality of life is significantly affected and infection risk increases
Solution Approach 1:
The patent extracts the power transmission function from the physical cable and implements it through wireless magnetic coupling. By separating the power delivery mechanism from the transcutaneous cable and using magnetic induction through the skin, the system eliminates the harmful aspects of cable penetration while maintaining the essential power supply function to the implanted device.
Solution Approach 2:
The patent replaces the mechanical transcutaneous cable system with a wireless electromagnetic power transmission system. Instead of using a physical conductor that penetrates the skin, the system uses magnetic field coupling to transfer power wirelessly, substituting a non-invasive electromagnetic mechanism for the invasive mechanical cable system.
4Ease of operation
If internal battery is used for low power devices, then device can be implantable, but power capacity is limited for higher power requirements
Solution Approach 1:
The patent creates a universal power supply system that can serve multiple functions and power levels. The wireless power transmission system can deliver varying power levels as needed, replacing the need for large batteries while maintaining implantability. This multi-functional approach allows the same system to power different types of implanted devices with varying power requirements without compromising either implantability or power capacity.
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 enables accurate and efficient localization of implanted devices and optimal coupling, reducing the time and effort required for alignment, thereby improving the quality of life for patients and ensuring reliable power transmission to medical implants.
Implementation Method 1
a magnetic sensor array including a plurality of magnetic sensors, the magnetic sensor array configured to measure a magnetic field generated by the implanted device
Implementation Method 2
energy transfer is accomplished using two magnetically coupled coils set up like a transformer so power is transferred magnetically across the skin
Data Source
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AI summary
A system for locating an implanted device including magnetic coils within a subject is provided. The system includes a magnetic sensor array including a plurality of magnetic sensors, the magnetic sensor array configured to measure a magnetic field generated by the implanted device, and a position detection module communicatively coupled to the magnetic sensor array, the position detection module configured to receive the measured magnetic field from the magnetic sensor array, and calculate a position of the implanted device based on the measured magnetic field.