Electroadhesive Shear Gripper for Irregular Object Handling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional robotic grippers face limitations in handling large, irregularly shaped, dusty, or fragile objects due to the need for suction, chemical adhesives, or significant mechanical forces, which can damage surfaces, require substantial power, and are not suitable for all surface types.
Innovation Solution
The development of electroadhesive systems that use electrodes to induce an electrostatic attraction with objects, allowing for the use of shear forces to grip and manipulate items without direct contact, using flexible and conformable surfaces to adapt to various shapes and conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If suction is used to grip objects, then gripping capability is improved, but surface requirements become restrictive and power consumption increases
Solution Approach 1:
The patent replaces the mechanical suction system with an electroadhesive system that uses electrostatic forces. The electroadhesive surface with electrodes generates electric fields that induce polarization in nearby objects, creating attraction forces without requiring vacuum seals or smooth surfaces. This substitution enables gripping of diverse surfaces including dusty, rough, or irregular surfaces that would be incompatible with traditional suction methods.
2Force
If mechanical actuation with large normal forces is used, then gripping strength is improved, but object damage risk increases and system weight increases
Solution Approach 1:
The patent replaces mechanical crushing forces with electroadhesive forces. Instead of using mechanical actuators that apply large normal forces through contact, the system uses electrodes to generate electric fields that induce polarization in the object, creating attraction forces through the air gap. This non-contact approach eliminates surface damage while providing sufficient gripping force for delicate objects.
3Strength
If chemical adhesives are used for handling, then adhesion strength is improved, but residues are left and dust attraction increases
Solution Approach 1:
The patent replaces chemical adhesive bonds with electroadhesive forces. The electroadhesive surface uses electrodes to generate electric fields that induce polarization in nearby objects, creating reversible adhesion without chemical reactions. This eliminates residues and dust attraction problems associated with chemical adhesives, while providing controllable adhesion strength through voltage control.
4Adaptability or versatility
If conventional robotic grippers are used, then handling capability is improved, but power consumption increases and system complexity increases
Solution Approach 1:
The patent replaces power-intensive mechanical systems with electroadhesive systems. Instead of using vacuum pumps, mechanical actuators, or chemical adhesive application systems, the invention uses electrodes that generate electric fields through applied voltage. The electroadhesive surface maintains grip through controlled polarization, consuming less power while providing versatile handling capability for various object types and conditions.
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 the efficient and gentle handling of diverse objects by reducing the need for mechanical forces and adhesives, allowing for precise control and reduced power consumption, while minimizing damage and improving handling of complex or delicate items.
Implementation Method 1
electrodes that are configured to induce an electrostatic attraction with nearby objects when an appropriate voltage or current is applied to the electrodes
Implementation Method 2
the electrode polarization can induce a corresponding polarization in a nearby object to effect adhesion of the object to the electroadhesive surface
Data Source
AI summary
An electroadhesive gripping system includes a shear gripper. The shear gripper can include an electroadhesive surface associated with one or more electrodes and a load-bearing structure coupled to the electroadhesive surface. A power supply can be configured to apply voltage to the one or more electrodes associated with the electroadhesive surface. A controller can be configured to cause a voltage to be applied, via the power supply, to the one or more electrodes associated with the electroadhesive surface to thereby cause the first shear gripper to adhere to an item situated proximate the electroadhesive surface. The controller can be configured to cause a shear force to be applied to the adhered item, via the load-bearing structure, that is sufficient to move the adhered item.