3D Dielectrically-Coated Microstructures for Low-Voltage Adhesion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional adhesive devices for robotic grippers and automatic materials handling systems face limitations in speed and versatility due to complex mechanical actuation requirements and high operating voltages needed for sufficient adhesion strength, especially when handling objects of varying shapes and sizes.
Innovation Solution
Development of controllable electromechanical adhesive devices with three-dimensional hierarchical microarchitectures that are mechanically compliant and dielectrically coated, allowing for tunable electromechanical surface adhesion with low operation voltage and wide on/off ratios, along with integrated force sensing capabilities for tactile feedback and surface topology analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional electrostatic adhesive devices use high operating voltages to achieve sufficient adhesion strength, then adhesion strength is improved, but energy consumption increases and device safety decreases
Solution Approach 1:
The patent changes the voltage parameter from high voltage (>1 kV) to low voltage (<100V) operation by introducing a dielectric coating on the microstructures. This dielectric layer enables sufficient electrostatic adhesion at low voltages by increasing the electric field strength between the microstructures and the object surface, thereby reducing energy consumption while maintaining adhesion strength
Solution Approach 2:
The patent uses a composite structure consisting of conductive microstructures coated with a dielectric material. This composite design allows the device to achieve both mechanical compliance through the microstructure geometry and effective electrostatic adhesion through the dielectric coating, enabling low-voltage operation with sufficient adhesion strength
2Ease of operation
If conventional adhesive devices use complex mechanical actuation to control adhesion, then adhesion control precision is improved, but device complexity increases and operation speed decreases
Solution Approach 1:
The patent replaces complex mechanical actuation systems with direct electrical control. By applying voltage to the conductive microstructures, adhesion is controlled electrostatically rather than mechanically, dramatically simplifying the device architecture while maintaining precise control capability. The microstructures themselves deform in response to electrostatic forces, providing the needed compliance without mechanical actuators
Solution Approach 2:
The conductive microstructures serve multiple functions simultaneously: they provide mechanical compliance through their geometry, act as electrodes for electrostatic adhesion when voltage is applied, and enable force sensing through their deformation. This multi-functionality eliminates the need for separate mechanical actuation and sensing systems
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 dexterous gripping of microscale and macroscale objects with adjustable adhesion strength and force sensing, facilitating efficient handling of diverse objects without complex mechanical actuation and at lower voltages, while providing accurate surface topology information for precise positioning.
Implementation Method 1
Some conventional devices and/or surfaces can provide controlled surface adhesion using electrostatic attraction. Conventional electrostatic adhesive devices are typically two-dimensional (2D) planar devices having embedded interdigitated electrodes covered with a thin dielectric coating.
Implementation Method 2
The plurality of 3D conductive microstructures are configured to deform when in contact with a surface of an object. The device is configured to provide an output for determining a force applied by a surface of an object against the plurality of conductive microstructures, with the output being indicative of a change in an electrical property of one or more of the plurality of conductive microstructures.
Data Source
AI summary
Controllable electromechanical adhesive devices including three-dimensional dielectrically-coated microstructures that are mechanically compliant are provided. The microstructures can be controlled to provide tunable electromechanical surface adhesion, allowing for dexterous gripping of microscale and/or macroscale objects. For example, the devices can tune the surface adhesion strength of one or more microstructures without complex mechanical actuation in a wide range of on/off ratios with low voltage. The devices can be configured as a force sensor capable of providing tactile feedback for determining the load applied against the microstructures by the surface of an object. For example, the devices can provide output indicative of changes in an electrical property of one or more microstructures for determining the applied load of an object. The devices can be pixelated or otherwise configured to provide localized force sensing and/or surface adhesion. Related systems and methods for controlling the disclosed electromechanical adhesive devices are also described.