Lockable Connector Device Using Temperature-Responsive Synthetic Muscles
Solution Overview
Problem
Mechanical robotic arms require advanced positioning and locking mechanisms to safely perform tasks in diverse environments, especially where human safety is a concern, such as hazardous waste handling and distant exploration missions, but existing solutions lack flexibility and stability.
Innovation Solution
A lockable connector device utilizing synthetic muscles that compress and decompress based on temperature changes, combined with a low-friction coating and actuator enclosed-resistors, allows for flexible repositioning and secure fixation, while a strain gauge feedback system prevents excessive force and damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If traditional locking mechanisms are used in robotic arms, then stability is improved, but flexibility and repositioning capability deteriorate
Solution Approach 1:
The locking mechanism transitions from static to dynamic through temperature-responsive shape memory alloy elements that can reversibly change between locked and unlocked states, enabling the robotic arm to switch between stable positioning and flexible repositioning as needed
Solution Approach 2:
The locking mechanism utilizes temperature as a control parameter to change the physical state of shape memory alloy elements, allowing transition between locked and unlocked configurations without mechanical actuation, thus resolving the contradiction between stability and flexibility
2Manufacturing precision
If mechanical locking structures are added to robotic arms, then positioning accuracy is improved, but device complexity increases
Solution Approach 1:
Traditional mechanical locking structures are replaced with temperature-responsive shape memory alloy elements that achieve locking through thermal actuation rather than complex mechanical linkages, reducing structural complexity while maintaining positioning accuracy
Solution Approach 2:
The locking mechanism exploits phase transitions in shape memory alloys between austenite and martensite phases to achieve precise positioning and locking without complex mechanical structures, simplifying the overall device design
3Adaptability or versatility
If synthetic muscles are used for actuation, then adaptability is improved, but control precision deteriorates due to temperature response delays
Solution Approach 1:
Temperature sensors and control systems provide real-time feedback to monitor and adjust the thermal state of synthetic muscles, compensating for response delays and improving positioning precision while maintaining grasping adaptability
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 safe and versatile robotic task execution by providing a stable, flexible 'third hand' that can securely grasp tools and objects, ensuring human safety and preventing damage from excessive force or environmental interference.
Implementation Method 1
A lockable connector device utilizing synthetic muscles that compress and decompress based on temperature changes
Implementation Method 2
a low-friction coating at a base of the appendages 108 can be present to provide easy gliding and/or positioning of the spherical bodies 102, 110
Data Source
AI summary
A lockable connector device and system is described. An example lockable connector device includes a first spherical body connected to a first end of a shaft and a plurality of appendages connected to a second end of the shaft. The appendages partially encase a second spherical body and an actuator connected to the appendages, where the actuator is comprised of synthetic muscles that compress to lock the second spherical body.