Our sense of touch is clearly more acute than many realize.
A new study demystifies the “unknown sense” with first-ever measurements of human tactile perception.
In a ground-breaking study, Swedish scientists have shown that people can detect nano-scale wrinkles while running their fingers upon a seemingly smooth surface. The findings could lead such advances as touch screens for the visually impaired and other products, says one of the researchers from KTH Royal Institute of Technology.
The study marks the first time that scientists have quantified how people feel, in terms of a physical property. One of the authors, Mark Rutland, Professor of Surface Chemistry, says that the human finger can discriminate between surfaces patterned with ridges as small as 13 nanometres in amplitude and non-patterned surfaces.
“This means that, if your finger was the size of the Earth, you could feel the difference between houses from cars,” Rutland says. “That is one of the most enjoyable aspects of this research. We discovered that a human being can feel a bump corresponding to the size of a very large molecule.”
The research team consisted of Rutland and KTH PhD student Lisa Skedung, and psychologist Birgitta Berglund and PhD student Martin Arvidsson from Stockholm Universiy. Their paper, Feeling Small: Exploring the Tactile Perception Limits, was published on September 12 in Scientific Reports. The research was financed by a grant from Vinnova and the Knowledge Foundation to the SP Technical Research Institute of Sweden. Rutland says that the project will pursue applications of the research together with SP.
The study highlights the importance of surface friction and wrinkle wavelength, or wrinkle width – in the tactile perception of fine textures.
When a finger is drawn over a surface, vibrations occur in the finger. People feel these vibrations differently on different structures. The friction properties of the surface control how hard we press on the surface as we explore it. A high friction surface requires us to press less to achieve the optimum friction force.
“This is the breakthrough that allows us to design how things feel and are perceived,” he says. “It allows, for example, for a certain portion of a touch screen on a smartphone to be designed to feel differently by vibration.”
The research could inform the development of the sense of touch in robotics and virtual reality. A plastic touch screen surface could be made to feel like another material, such as fabric or wood, for example. The findings also enable differentiation in product packaging, or in the products themselves. A shampoo, for example, can be designed to change the feel of one’s hair.
The Latest on: Human tactile perception
New 'e-skin' brings sense of touch to prosthetic hands
on June 20, 2018 at 5:01 pm
Human skin contains a complex network of receptors that ... but they often lack meaningful, tactile feedback or perception,” he said. That is where the e-dermis comes in, conveying information to the amputee by stimulating peripheral nerves in the ... […]
New 'e-dermis' brings sense of touch, pain to prosthetic hands
on June 20, 2018 at 3:06 pm
Human skin contains a complex network of receptors that ... but they often lack meaningful, tactile feedback or perception." That is where the e-dermis comes in, conveying information to the amputee by stimulating peripheral nerves in the arm, making ... […]
Bringing a human touch to modern prosthetics
on June 20, 2018 at 12:01 pm
tactile feedback or perception." That's where the e-dermis comes in, conveying information to the amputee by stimulating peripheral nerves in the arm, making the so-called phantom limb come to life. Inspired by human biology, the e-dermis enables its user ... […]
Three end-of-arm robotic companies become OnRobot
on June 20, 2018 at 11:25 am
The new company combines U.S.-based Perception ... of the human hand. Perception Robotics, founded in 2012 and based in Los Angeles, develops bio-inspired robot grippers: 1) a gecko-inspired gripper for handling large, flat objects and 2) a tactile ... […]
A Prosthetic That Feels Pain
on June 20, 2018 at 11:00 am
“We can now span a very human-like sense of perception, from light touch to pressure to pain ... But it’s clear that better tactile capabilities could help robots grasp objects better and perform a wider range of functions. And if the robotics industry ... […]
Cobot trio merge to create a specialist in end-of-arm tooling
on June 11, 2018 at 4:37 am
US-based Perception Robotics ... the dexterity of the human hand. • Perception Robotics, founded in 2012, develops bio-inspired robot grippers, including a gecko-inspired gripper for handling large, flat objects, and a tactile gripper with compliant ... […]
Uncovering the secrets of the human body's perception of touch
on March 8, 2018 at 4:48 am
"I started studying touch modality 16 years ago as an undergraduate. My doctorate was about human tactile perception for developing tactile displays that can provide information through the skin surface." After his doctorate, Nakatani investigated touch ... […]
Immersion and Perception Collaborate to Bring Haptics to Human Machine Interfaces, Content
on September 6, 2017 at 5:00 pm
and Perception, a New York-based firm specializing in conceptual human machine interface design and visualizations, today announced their collaboration to bring high-quality tactile effects to human machine interfaces and content experiences. The team at ... […]
via Google News and Bing News