Magnetic Wheel Robot Adhesion Detection on Unknown Surfaces
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Solution Overview
Problem
Existing moving devices struggle to confirm the adhesion state between wheels and traveling surfaces, particularly when the material or shape of the surface is unknown, requiring visual inspection or manual adjustment by operators.
Innovation Solution
A moving device equipped with wheels incorporating magnets and magnet drive units, along with a control unit that detects adhesion states based on the output of the magnet drive unit during rotation, allowing for automated confirmation of adhesion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If visual confirmation or manual adjustment is used to confirm adhesion state, then operator can determine magnet orientation, but operation becomes complex and time-consuming
Solution Approach 1:
The system performs self-diagnosis by automatically detecting adhesion state through the magnet drive unit's output during rotation, eliminating the need for operator visual confirmation or manual adjustment. The controller autonomously determines whether the magnet is properly adhered to the traveling surface based on electrical characteristics during rotation.
Solution Approach 2:
The patent replaces manual visual inspection and mechanical adjustment with an electrical detection system. The controller uses electrical characteristics (current, voltage, or power) from the magnet drive unit during rotation to automatically determine adhesion state, substituting human sensory and manual operations with automated electrical measurement.
2Reliability
If operator visually confirms traveling surface shape or acquires material information, then adhesion state can be determined, but process becomes complicated and requires prior knowledge
Solution Approach 1:
The patent extracts the adhesion detection function from complex external information acquisition (visual inspection, material identification) and concentrates it in the controller that analyzes electrical characteristics of the magnet drive unit. This simplifies the system by removing the need for sensors or tools to detect surface properties.
Solution Approach 2:
The magnet drive unit serves dual functions: it drives the magnet for movement and simultaneously acts as a sensor for adhesion detection. The same actuator is used for both propulsion and state detection, eliminating the need for separate detection devices and simplifying the overall system.
3Ease of operation
If automated adhesion detection is implemented, then operation simplicity is improved, but requires additional detection functionality
Solution Approach 1:
The magnet drive unit is designed to perform both driving and detection functions. During normal operation, it propels the moving device; during adhesion detection, it rotates the magnet and the controller analyzes its electrical characteristics to determine adhesion state. This multi-functionality avoids adding separate detection hardware.
Solution Approach 2:
The system uses its own drive unit as the detection sensor, performing self-diagnosis. The controller monitors the electrical characteristics of the magnet drive unit during rotation to automatically determine adhesion state, making the system self-sufficient without external detection equipment.
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 easy and reliable confirmation of adhesion states between wheels and surfaces, facilitating operation on complex shapes without manual intervention and preventing re-entry onto non-adherable surfaces.
Implementation Method 1
a magnet drive unit that rotates the magnet around a rotary shaft
Implementation Method 2
a magnet incorporated into each of the plurality of wheels... the magnet can be passively adhered to a traveling surface of a magnetic body
Data Source
Figure 1A~1B
Figure 2A~2B
Figure 3
AI summary
A traveling robot 10 includes: a plurality of wheels 16 supported by a frame 20; a magnet 19 incorporated into each of the plurality of wheels 16; a magnet drive unit 191 that rotates the magnet 19 around a first rotary shaft Ax1; and a control unit 37. The control unit 37 detects an adhesion state between the wheels 16 and a traveling surface, based on an output of the magnet drive unit 191 when rotating the magnet 19.