JUN 27, 2019 9:40 AM PDT

Soft Robots for Everyone

WRITTEN BY: Nouran Amin

Soft robots are unique—they can dominate assembly lines, perform backflips, dance to the latest pop music video, and even walk through volcanoes. Each year, soft robots acquire new skills making them hard to compete with hard robots. For one, they can handle items with care and without fear of damage. For example, they can hold a tomato without bruising the fruit. Soft robots hold a “cooperative function”—a soft touch.

Most recently, researchers worked on advancing soft robots by utilizing soft replacements instead of hard parts needed to build a robot and instead of electricity, they used pressurized air expands and contracts rubber inflatables.

Harvard University: (Left) The soft ring oscillator shows its resiliency in a high-strain deformation test. (Right) The soft ring oscillator converts a constant input pressure to multiple temporally-coordinated oscillating outputs. Credit: D.J. Preston, H.J. Jiang, V. Sanchez, P. Rothemund, J. Rawson, M.P. Nemitz, W.K. Lee, Z. Suo, C.J. Walsh, and G.M. Whitesides

“It’s another tool in the toolkit to make these smart, soft robots without any electronics, and without any hard valves,” says postdoctoral scholar Daniel J. Preston who worked on the latest soft robot invention and introduced the soft ring oscillator.

Traditionally, ring oscillators were composed of electronic transistors or microfluidics, which require hard components. However, soft ring oscillator depends on inverters (“NOT” digital logic gates) which manipulates air pressure. “The cool response that you get when you combine an odd number of these inverters in a loop is an instability that travels around the loop,” Preston says.

Harvard University: A soft ring oscillator inflates and deflates balloons in perfect synchronicity, nudging a foam robot to roll forward. Video Credit: D.J. Preston, H.J. Jiang, V. Sanchez, P. Rothemund, J. Rawson, M.P. Nemitz, W.K. Lee, Z. Suo, C.J. Walsh, and G.M. Whitesides

Harvard University; The soft-ring oscillator will give soft robots an edge in newer abilities such as rolling, undulating, sorting, and swallowing. “People can use the soft ring oscillator for a lot of different applications in soft robotics, some of which we may not have even thought of or envisioned yet.”

For example, recent studies have shown that the pumping motion can improve symptoms of lymphedema and chronic venous disease more effectively than simple compression. The device may help individuals who work on their feet for long hours avoid deep vein thrombosis.

Harvard University: A soft mechanotherapy device for the lower leg sequentially contracts around a human user's leg, "pumping" fluid up. The device could be used to treat conditions like lymphedema and chronic venous disease and to prevent deep vein thrombosis. Credit: Daniel Preston, Harvard University

Findings of the study were published in Science Robotics.

Source: Harvard University

About the Author
  • Nouran is a scientist, educator, and life-long learner with a passion for making science more communicable. When not busy in the lab isolating blood macrophages, she enjoys writing on various STEM topics.
You May Also Like
APR 15, 2021
Technology
New Technique for Creating Nanofibers Could Help Produce Affordable, Effective Mask Filters to Combat COVID-19
APR 15, 2021
New Technique for Creating Nanofibers Could Help Produce Affordable, Effective Mask Filters to Combat COVID-19
Recently, nanofibers have been used to improve the filtration quality of protective face masks and help them filter airb ...
MAY 05, 2021
Technology
Continuous Glucose Monitors (CGMs) Shed Light on Type 2 Diabetes in Hispanic Adults
MAY 05, 2021
Continuous Glucose Monitors (CGMs) Shed Light on Type 2 Diabetes in Hispanic Adults
According to the CDC, of the roughly 34 million Americans living with diabetes, up to 95% of them are living with type 2 ...
JUL 07, 2021
Technology
New Device Inactivates Bacteria That Cause Ear Infections
JUL 07, 2021
New Device Inactivates Bacteria That Cause Ear Infections
Researchers may have developed a device that could offer new therapeutic benefits to ear infection patients. According t ...
JUL 13, 2021
Clinical & Molecular DX
Friend or Foe? New Cancer-Tracking Pen Guides Surgeons.
JUL 13, 2021
Friend or Foe? New Cancer-Tracking Pen Guides Surgeons.
Researchers have developed the first diagnostic “pen” that acts as a guide for surgeons, helping them distin ...
JUL 17, 2021
Earth & The Environment
Solar Radio Signals Improve Monitoring of Melting Ice Sheets
JUL 17, 2021
Solar Radio Signals Improve Monitoring of Melting Ice Sheets
Solar radio signals from the sun could provide a cheaper and low-power way of monitoring vast expanses of ice sheets, an ...
AUG 01, 2021
Technology
Actually, You DO Know You Are a Brain in a Vat: Exoskeleton Pros and Cons
AUG 01, 2021
Actually, You DO Know You Are a Brain in a Vat: Exoskeleton Pros and Cons
Exoskeletons promise mobility and enhance strength, but a new study shows they can be debilitating for the brain
Loading Comments...