In the field of robotics, inspiration often comes from nature, and a recent innovation from engineers at MIT and Stanford University exemplifies this perfectly. Drawing from the remarkable ability of certain vines to wrap around and lift objects, the researchers have designed a robotic gripper that can adapt its form to snatch and elevate a variety of items, including people, with a gentler touch compared to traditional robotic grippers.
This innovative robotic system operates using a pressurized mechanism that inflates long, flexible tubes resembling vine tendrils. As these tubes extend, they twist and coil around an object before retracting toward the base unit. This clever design allows the gripper to secure items in a soft, sling-like manner, making it particularly useful in sensitive applications where conventional methods might be too harsh.
One of the immediate applications for this technology is in eldercare, where safely lifting individuals out of bed can be a physically demanding task for caregivers. Traditional patient lifts involve cumbersome maneuvering and often require a patient to be placed on a hammock-like sheet before being hoisted. The new robotic solution aims to simplify this process, allowing for a more comfortable experience for patients and reducing the physical strain on caregivers. According to Kentaro Barhydt, a PhD candidate at MIT and co-author of the research, this system not only alleviates the burden on caretakers but also prioritizes patient comfort.
At the core of this robotic gripper’s functionality is a combination of open-loop and closed-loop actions. In an open-loop mode, the robotic vines can extend and twist around an object, even slipping beneath a person lying down. The system then transitions to a closed-loop configuration by connecting to a winch, enabling it to lift the object seamlessly. This dual-mode functionality enhances the gripper’s versatility, allowing it to adapt to different tasks and improve performance.
While the initial focus of this research was on challenges faced in eldercare, the potential applications extend far beyond. The team has successfully tested a smaller version of the technology on a commercial robotic arm, demonstrating its capability to lift various heavy and delicate items, from a watermelon to a glass vase. Future prospects include its use in heavy industries, such as automating crane operations in ports and warehouses, showcasing the broad adaptability of this vine-inspired design.
Source: Vine-inspired robot fingers can reach out and grab someone via MIT Technology Review