Magnetic Shielded Micro Robot Coil for Focused In-Body Navigation
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Solution Overview
Problem
Conventional electromagnetic driving apparatuses for micro robots face limitations in generating a sufficient magnetic field intensity for effective control and miniaturization, particularly in varying body types and distances, and struggle to accurately focus magnetic fields within the human body for precise micro robot navigation.
Innovation Solution
A micro robot driving apparatus featuring a magnetic shielding electromagnetic driving coil unit with a soft magnet core and a power supply, combined with a system using two electromagnets to overlap magnetic fields, allowing for enhanced magnetic field intensity and focused control within a localized area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the electromagnetic driving coil is moved farther from the subject to accommodate varying body types, then the adaptability improves, but the magnetic field intensity applied to the medical device is sharply reduced
Solution Approach 1:
The patent applies magnetic shielding material specifically at strategic locations around the electromagnetic driving coil to create localized magnetic field concentration. This allows the coil to be positioned farther from the subject while maintaining high magnetic field intensity at the target location, resolving the contradiction between adaptability and magnetic field strength.
Solution Approach 2:
The magnetic shielding material acts as an intermediary that redirects and concentrates magnetic field lines. By placing this intermediary between the coil and the subject, the system can maintain effective magnetic coupling at greater distances, enabling adaptability to different body types without sacrificing magnetic field intensity.
2Force
If more current is applied to the coil to maintain magnetic field intensity at greater distances, then the magnetic field intensity is improved, but the power consumption and heat generation increase
Solution Approach 1:
Instead of uniformly increasing current throughout the coil, the patent uses magnetic shielding to locally concentrate and redirect magnetic field lines. This achieves the desired magnetic field intensity at the target location without proportionally increasing power consumption across the entire coil system.
Solution Approach 2:
The patent changes the magnetic field distribution parameters by introducing magnetic shielding material, which alters the magnetic circuit characteristics. This allows maintaining magnetic field intensity at greater distances through geometric and material parameter optimization rather than simply increasing current.
3Device complexity
If the coil is fixed and arranged on a table for electromagnetic driving, then the device complexity is reduced, but the control precision varies depending on body type and diagnosis site
Solution Approach 1:
The patent maintains the simple fixed coil arrangement but adds magnetic shielding at specific locations to create localized field concentration. This preserves the simplicity of the device while achieving precise control at the target site by concentrating magnetic flux where needed, regardless of subject positioning variations.
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 solution increases magnetic field generation intensity and enables precise control of micro robots within the body by miniaturizing the electromagnetic coil and accurately targeting specific locations, improving control precision and reducing the need for extensive current application.
Implementation Method 1
a power supply unit generating an induced magnetic field by applying magnetization current to the magnetic shielding electromagnetic driving coil module
Implementation Method 2
a magnetic shielding electromagnetic driving coil unit including a magnetic shielding electromagnetic driving coil module constituted by a coil winding unit and a magnetic shielding unit
Data Source
AI summary
The present invention relates to a micro robot driving apparatus which can increase the intensity of magnetic field generation in a driving area of a micro robot by attaching a magnetic shield unit to an electromagnetic drive coil unit for driving the micro robot, or locally focus a magnetic field through the combination of two electromagnets, and a system using the same. According to the present invention, there is an effect that driving the micro robot injected into the body may be controlled by increasing a magnetic field generation intensity in the region of interest or focusing the magnetic field.