Capsule Endoscope Magnetic Guidance Position Control
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Solution Overview
Problem
Current capsule endoscope guidance systems face challenges in precisely controlling the posture and position of capsule medical devices within a subject using magnetic fields, leading to unintended displacement during posture changes due to changes in magnetic field distribution.
Innovation Solution
A guidance device with a magnetic field generation unit, movement, and rotation mechanisms, along with a control unit, that adjusts the magnetic attracting force by changing the distance and orientation of the magnetic field to maintain the capsule's desired posture and position, using a joystick-based operation input unit for user control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the magnetic field generation unit rotates to change the posture of the capsule medical device, then the posture control is improved, but the capsule experiences unintended displacement due to changes in magnetic attracting force
Solution Approach 1:
The control unit continuously monitors the position of the capsule medical device and adjusts the magnetic field generation unit's rotation and movement to compensate for unintended displacement. This feedback mechanism ensures that posture changes are achieved while maintaining position accuracy.
Solution Approach 2:
The system dynamically adjusts multiple parameters including the rotation angle of the magnetic field generation unit, its distance from the capsule, and the strength of the magnetic field. By coordinating these parameter changes, the system achieves posture control without causing unintended displacement.
2Force
If the distance between the magnetic field generation unit and the capsule is reduced to increase magnetic attracting force, then the guidance effectiveness is improved, but the magnetic field distribution changes cause unintended posture changes
Solution Approach 1:
The system dynamically adjusts the distance between the magnetic field generation unit and the capsule based on real-time feedback. When increasing magnetic attracting force by reducing distance, the system simultaneously adjusts the rotation angle to compensate for unintended posture changes, maintaining both guidance effectiveness and posture control.
Solution Approach 2:
The control unit coordinates changes in multiple parameters: distance (affecting magnetic force) and rotation angle (affecting posture). By adjusting these parameters in a coordinated manner, the system achieves strong magnetic attraction while preventing unintended posture changes.
3Measurement precision
If the magnetic field generation unit is moved closer to the capsule to improve guidance precision, then the position control is improved, but the magnetic attracting force becomes unstable during rotation
Solution Approach 1:
The control unit continuously monitors both the position and the stability of the magnetic attracting force. When the capsule is positioned close to the magnetic field generation unit for precise control, the feedback mechanism detects fluctuations in magnetic force during rotation and adjusts the rotation speed and angle to maintain stability.
Solution Approach 2:
The system uses periodic adjustments of the magnetic field generation unit's rotation and position to maintain stable magnetic attracting force. By rotating in controlled periodic motions rather than continuous rotation, the system maintains position precision while stabilizing the magnetic force.
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 stable and precise control of the capsule endoscope's posture and position within the subject, preventing unintended displacement during magnetic guidance, thereby improving the accuracy and reliability of in-vivo imaging.
Implementation Method 1
a magnetic field generation unit configured to generate the magnetic field for guiding the capsule medical device
Implementation Method 2
the guidance device is provided with a magnetic field generation unit, such as an electromagnet or a permanent magnet, so that a magnetic attracting force of a magnetic field generated by the magnetic field generation unit magnetically guides the capsule endoscope in the subject
Data Source
AI summary
A guidance device includes: a magnetic field generation unit configured to generate the magnetic field; a movement mechanism configured to move the magnetic field generation unit in a vertical direction; a rotation mechanism configured to rotate the magnetic field generation unit in a vertical plane including a magnetization direction of the magnetic field generation unit; an input unit configured to input first operation information for changing posture of a capsule medical device; and a control unit configured to: cause the rotation mechanism to rotate the magnetic field generation unit to change the posture of the capsule medical device based on the first operation information; and control the movement mechanism to change a distance between the magnetic field generation unit and the capsule medical device to correct a magnetic attracting force in a vertical direction of the capsule medical device.