Deformable Sensor Stiffness Control via Magnetic Attraction
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Solution Overview
Problem
Robots lack the ability to adaptively modify their contact stiffness in real-time when interacting with objects of varying fragility, leading to potential damage or improper grasping due to limited touch sensitivity and fixed sensor configurations.
Innovation Solution
A deformable sensor system comprising a membrane coupled to a housing with magnetically-attractable particles and a magnetic object, allowing for adjustable stiffness by modifying air pressure within the sensor cavity, enabling real-time stiffness modification based on the strength of magnetic attraction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If fixed sensor configuration is used, then device complexity is reduced, but adaptability to objects of varying fragility deteriorates
Solution Approach 1:
The patent implements a magnetic object that can be dynamically repositioned within the sensor cavity to adjust membrane stiffness in real-time. This dynamic adjustment mechanism allows the sensor to adapt to different object fragilities by changing the magnetic attraction force on particles, resolving the contradiction between fixed configuration simplicity and adaptability requirements.
Solution Approach 2:
The patent changes physical parameters of the sensor system by modifying the position and strength of magnetic attraction to alter membrane stiffness. This parameter adjustment enables the same sensor to handle different fragility levels without requiring multiple fixed configurations, thus improving adaptability while maintaining device simplicity.
2Ease of operation
If fixed stiffness is used, then ease of operation is improved, but object-affected harmful factors increase
Solution Approach 1:
The magnetic object can be dynamically repositioned to adjust membrane stiffness based on the fragility of the object being manipulated. This dynamic adjustment allows the system to maintain ease of operation while preventing damage to fragile objects by reducing stiffness when needed, thus resolving the contradiction between operational simplicity and harm prevention.
3Strength
If higher magnetic attraction is applied, then stiffness is improved, but energy consumption increases
Solution Approach 1:
The patent adjusts the magnetic attraction parameter dynamically based on the required stiffness level. By changing the position and strength of the magnetic field only when stiffness adjustment is needed, the system achieves the required membrane strength while minimizing unnecessary energy consumption, thus resolving the contradiction between strength and energy efficiency.
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 robots to accurately detect object geometry and pose while adapting force application to handle objects of varying fragility, reducing the risk of damage and improving grasping precision through real-time stiffness adjustment.
Implementation Method 1
magnetic object located at a base within the sensor cavity. The magnetic object may be configured to modifiably attract the magnetically-attractable particles and modify stiffness of the deformable sensor by modifying air pressure within the sensor cavity, based on modifiable strength of the magnetic object to attract the magnetically-attractable particles
Data Source
AI summary
Deformable sensors and methods for modifying membrane stiffness through magnetic attraction are provided. A deformable sensor may include a membrane coupled to a housing to form a sensor cavity. The deformable sensor may further include magnetically-attractable particles located on or within the membrane. The deformable sensor may additionally include a magnetic object located at a base within the sensor cavity. The magnetic object may be configured to modifiably attract the magnetically-attractable particles and modify stiffness of the deformable sensor by modifying air pressure within the sensor cavity, based on modifiable strength of the magnetic object to attract the magnetically-attractable particles.