Position-Adjustable Coil Electromagnetic Actuator for Medical Devices
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Solution Overview
Problem
Existing electromagnetic actuating devices for medical devices inserted into the human body face inefficiencies in controlling actuation force due to distance variations from the body shape and body part being diagnosed, leading to reduced control precision and increased power consumption, as well as delayed response from magnetic cores that obstruct rapid magnetic field changes during rotational actuation.
Innovation Solution
An electromagnetic actuating device with a coil unit and actuator that adjusts the relative positions of the solenoid coil and magnetic core, allowing the coil unit to move back and forth, driven by an actuating screw and pinion gear system, to optimize magnetic flux and minimize distance to the medical device, thereby enhancing power efficiency and control precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the coil is fixedly disposed in the electromagnetic actuating device, then the structure is simple and stable, but the distance between the coil and the medical device changes depending on the body shape and body part, leading to inefficient control precision and increased power consumption
Solution Approach 1:
The coil unit is made movable relative to the magnetic core through an actuating mechanism, allowing dynamic adjustment of their relative positions. This enables the system to maintain optimal distance between the coil and medical device despite variations in body shape and body part, thereby improving control precision while managing device complexity through structured movement mechanisms.
2Force
If a large amount of current is applied to the coil to control the medical device at a distance, then the magnetic field intensity is sufficient, but the power consumption increases significantly
Solution Approach 1:
The actuating mechanism dynamically adjusts the position of the coil unit relative to the magnetic core to maintain optimal spacing. This ensures that sufficient magnetic field intensity is achieved at the medical device location without requiring excessive current, thereby reducing power consumption while maintaining effective actuation force.
3Force
If the magnetic core is used to increase magnetic force, then the magnetic force is enhanced, but the inductance of the electromagnet increases, causing delayed response to magnetic field changes
Solution Approach 1:
The system dynamically adjusts the relative position between the coil unit and magnetic core. By optimizing their spacing, the system maintains enhanced magnetic force from the magnetic core while minimizing the negative impact of increased inductance on response speed, achieving a balance between force enhancement and rapid response capability.
4Force
If the electromagnet is positioned close to the subject to provide larger magnetic force, then the magnetic force increases, but the position adjustment mechanism becomes more complex
Solution Approach 1:
The actuating mechanism provides controlled movement of the coil unit relative to the magnetic core, enabling precise positioning that maximizes magnetic force delivery to the subject. This structured dynamic adjustment achieves optimal magnetic force while managing the complexity of the position adjustment mechanism through organized mechanical design.
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 enables efficient supply of actuation force to medical devices based on body shape and body part, improving power efficiency and allowing for precise control with reduced inductance and faster magnetic field changes, facilitating minimally invasive surgery with enhanced precision and reduced recovery times.
Implementation Method 1
a coil unit for generating a magnetic field toward a medical device inserted into a human body
Implementation Method 2
a magnetic core focusing magnetic flux in the solenoid coil
Data Source
AI summary
An electromagnetic actuating device. A coil unit generates magnetic field toward a medical device inserted into a human body. An actuator drives the coil unit to move back and forth, thereby adjusting the rate of a change in magnetic force or magnetic field applied to the medical device. The coil unit moves linearly back and forth depending on the body shape of a subject and the body part to be diagnosed, such that actuation force is efficiently supplied to the medical device.