Magnetic Crawler Wheel Tilting for Low-Force Surface Release
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Solution Overview
Problem
Existing robots with powerful magnets for adhering to ferromagnetic surfaces face challenges in detachment due to the high energy requirements exceeding the limited power capacity of their batteries, making it difficult to pry them off without excessive energy consumption.
Innovation Solution
A wheel tilting mechanism using a pivot point and attachment members to reduce magnetic adhesion by pivoting the magnetic wheels away from the surface, allowing detachment with reduced energy demands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If powerful magnets are used in wheels to establish strong magnetic adhesion to ferromagnetic surfaces, then the crawler can reliably adhere and crawl on surfaces, but a large amount of force is required to detach the crawler from the surface
Solution Approach 1:
The wheel assembly is made dynamically adjustable through a tilting mechanism that allows the wheel to change its angle relative to the surface. By pivoting the wheel assembly about a pivot point, the magnetic wheel can be tilted to reduce the contact area with the surface, thereby reducing magnetic adhesion force and enabling easier detachment without requiring excessive force to overcome the strong magnetic attraction.
Solution Approach 2:
The magnetic adhesion parameter is changed by altering the geometric configuration of the wheel assembly. By changing the tilt angle of the magnetic wheel relative to the surface through the tilting mechanism, the effective magnetic coupling is adjusted. This allows the system to transition between strong adhesion during crawling and reduced adhesion during detachment, resolving the contradiction between reliable attachment and easy detachment.
2Reliability
If powerful magnets are employed to prevent inadvertent disengagement, then the crawler maintains secure attachment, but the energy required to detach the crawler exceeds the limited power capacity of onboard batteries
Solution Approach 1:
The dynamic tilting mechanism allows the system to reduce magnetic adhesion force during detachment by changing the wheel's angular position. This mechanical adjustment reduces the energy required for detachment to levels that can be supplied by onboard batteries, resolving the contradiction between secure attachment and energy-feasible detachment.
Solution Approach 2:
Instead of using a purely mechanical prying or lifting mechanism that would require significant force and energy, the patent employs a magnetic field-based approach combined with a simple tilting mechanism. The reduction in magnetic adhesion through tilting substitutes for complex mechanical detachment systems, thereby reducing energy consumption within the limits of battery power capacity.
3Force
If the magnetic wheel is kept parallel to the surface, then maximum magnetic adhesion is achieved, but the crawler cannot be easily removed from the surface
Solution Approach 1:
The tilting mechanism provides dynamic control over the wheel's orientation. When the wheel assembly is tilted at an angle relative to the surface, the magnetic wheel no longer maintains maximum contact area with the surface, thereby reducing magnetic adhesion force. This dynamic adjustment enables easy detachment while maintaining the capability for maximum adhesion when needed for crawling.
Solution Approach 2:
The patent introduces an additional degree of freedom by allowing the wheel assembly to tilt in an angle dimension rather than remaining fixed parallel to the surface. This angular dimension provides a simple yet effective means to control magnetic adhesion force, enabling easy detachment by simply changing the wheel's angular position relative to the surface.
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 mechanism enables efficient detachment of crawlers from ferromagnetic surfaces with lower energy consumption, facilitating easy removal and reattachment, suitable for various robotic applications.
Implementation Method 1
the magnetic component establishes a magnetic adhesion of the wheel to the surface
Data Source
AI summary
An apparatus and method detach a crawler having a magnetic wheel from a surface of a structure using a wheel tilting mechanism. A portion of the magnetic wheel magnetically adheres to the surface. The apparatus includes a platform engaging the crawler. Movement of a coupling member of the platform pivots or tilts an axle of the magnetic wheel to lift a portion of the wheel away from the surface, thereby reducing the magnetic adhesion of the wheel to the surface. Based on the reduced magnetic adhesion, the platform detaches the magnetic wheel from the surface, and detaches the crawler from the platform. The method implements operation of the apparatus.