According to a report by the Australian Broadcasting Corporation (ABC) on the 16th, according to a new study conducted by Swedish scientists, human fingers are extremely sensitive and can sense elevations as high as a few nanometers. This study found significant implications for the development of private electronic devices and robots. Research papers were published in the "Science Report", a magazine in Nature.
According to a new study conducted by Swedish scientists, human fingers are extremely sensitive and can sense elevations as high as a few nanometers. This study found that it is important for the development of private electronic devices and robots.
According to Principal Investigator Mark Rutteland, a surface chemist at the Royal Institute of Technology in Stockholm, until recently, touch is still a relatively unknown sensation. Ruthlander said: “What kind of surface the human finger is able to perceive and how it perceives it still gives people a magical feeling.†Rutland grew up in Adelaide and took the Australian National University. To doctorate.
Previous studies conducted by scientists have found that there are three main "dimensions" that can be used to describe haptics: rough-flat, hard-soft and sticky-smooth. Rutland said: “In fact, there are other stimuli such as hot and humid, but we tend to exclude them and only pay attention to topographical things.†Rutland’s research team is made up of materialists and psychologists. In composition, they developed a test method for measuring the sensitivity of human fingers in distinguishing between rough and flat surfaces.
During the course of the study, scientists created 16 polymer surfaces with a series of parallel ridge structures. The distance between the ridges—called the “wavelengthâ€â€”between 300 and 90 microns and 7 nanometers in height To 4.5 microns. In addition, they also use a blank surface with no ridges. In the experiment, they had 20 volunteers blindfolded and allowed them to perceive two surfaces at a time. Specifically, let volunteers slide on the surface with their index fingers. After this, they asked volunteers to compare the degree of similarity or difference between the two surfaces. What surprises Ruthlander is that the experimental results show that volunteers can perceive only nano-scale projections. He said: "Participants were able to distinguish between very small surfaces with an average difference of 13 nanometers. This discovery surprised me."
Ruthlander pointed out that understanding touch and haptic feedback helps to develop various electronic products and attract consumers. He said: "If you challenge a product in a store, you will certainly want to have other appealing places besides appearance or taste. You want to be able to perceive the product in a certain way and control it at multiple levels of perception. Tactile feedback."
Ruthlander said that the consumer electronics industry has the greatest interest in understanding and controlling tactile surfaces, and other industries can also be the beneficiaries of this research. He said: "The shampoo industry will also be interested in this kind of research, because the way hair is perceived is an important factor to attract consumers. In fact, no matter what kind of goods, consumers first use the sense of touch, and then Decide whether or not to buy. Touch is an important factor influencing consumer purchasing decisions."
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