Magnetic Field Actuation for Particle Aggregation
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Solution Overview
Problem
Current methods for particle movement and aggregation, such as magnetic particle manipulation, are costly, complex, and not scalable, making it difficult to deliver particles effectively to target regions, especially in challenging environments like the brain and central nervous system, and often require feedback loops that increase system complexity.
Innovation Solution
A method and device using an open-loop system that generates alternating magnetic fields through conductors and permanent magnets to aggregate particles in a target region without feedback control, allowing for controlled movement and aggregation of particles in living or non-living spaces by dynamically programming magnetic field profiles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If magnetic particle manipulation using magnetic tweezers is used, then particle manipulation capability is improved, but system cost and complexity increase
Solution Approach 1:
The patent replaces complex mechanical magnetic tweezer systems with an electromagnetic field-based approach using arrays of conductors that generate magnetic fields through controlled current switching. This substitution eliminates the need for physical mechanical manipulation systems while achieving the same particle manipulation goals through field-based control.
Solution Approach 2:
The patent divides the magnetic field generation system into multiple discrete conductor elements arranged in arrays. By segmenting the field generation into controllable units that can be switched independently, the system achieves precise particle manipulation without requiring a single complex mechanical tweezer assembly.
2Manufacturing precision
If feedback control is used to track particle position, then particle delivery precision is improved, but system complexity and cost increase
Solution Approach 1:
The patent employs an open-loop control system where the magnetic field configuration is predetermined based on particle properties (friction, drag, mass). The system automatically achieves accurate particle delivery without requiring active feedback tracking, as the field patterns are designed to naturally guide particles to target locations based on their inherent physical characteristics.
Solution Approach 2:
The patent pre-calculates and pre-configures magnetic field patterns that account for specific particle properties before particle introduction. By preparing the magnetic field landscape in advance based on known particle characteristics, the system ensures accurate particle delivery without needing real-time feedback adjustment during the transport process.
3Quantity of substance
If traditional tumor treatment therapies are used, then treatment coverage is improved, but damage to peripheral tissue increases
Solution Approach 1:
The patent uses magnetic field confinement to create localized treatment zones where immune cells and nanoparticles are precisely delivered to tumor sites. By generating focused magnetic field patterns that concentrate therapeutic agents only at the target location, the system achieves effective tumor treatment while leaving surrounding healthy tissue unaffected.
4Productivity
If particle aggregation methods are used to deliver cargo, then delivery efficiency is improved, but system scalability is reduced
Solution Approach 1:
The patent creates a universal magnetic field generation platform using conductor arrays that can aggregate and deliver various types of particles (immune cells, nanoparticles, stem cells) to different target locations. The same basic system architecture handles multiple particle types and delivery scenarios, making the system highly scalable and adaptable to different applications without requiring separate specialized systems.
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
Enables efficient and scalable particle delivery to target regions with reduced complexity and cost, effectively guiding particles to stable aggregation points, even in difficult-to-access areas, by varying magnetic field profiles based on particle properties like friction, drag, and mass.
Implementation Method 1
generating at least a first magnetic field during a first time interval, and generating at least a second magnetic field during a second time interval
Implementation Method 2
Magnetic particle manipulation using magnetic tweezers is known to have been used in cell separation and tissue engineering
Data Source
AI summary
A device is dynamically programmable to generate at least a first magnetic field during a first time interval, and at least a second magnetic field during a second time interval thereby causing the particles exposed to the change in the magnetic field to aggregate to a target region. The device is further dynamically programmable to switch between the first and second magnetic fields for any number of cycles. Optionally, the device includes a multitude of conductors that receive a first current during the first time interval to generate the magnetic field, and a second multitude of conductors that receive a second current during the second time interval to generate the second magnetic field. The second multitude of conductors may be substantially parallel to the first multitude of conductors. A controller disposed within the device is adapted to vary the frequency of switching between the first and second magnetic fields.