Mimicking Touch 如何在視頻通話中“碰觸”到對方

Video calls are a commonoccurrence， but have you imagined beingable to touch the person on the other endof the line？ Scientists are making this areareality.

Researchers at the University of New South Wales， Australia， have invented a soft Skin Stretch Device （SSD）， a haptic device that can recreate the sense of touch . Haptic technology mimics the experience of touch by stimulating localized areas of the skin in ways that are similar to what is felt in the real world， through force， vibration or motion.

Vibration is the most common haptic technology today and has been built into many electronic devices， such as one attached to the back of a trackpad in laptops， which simulates a button clicking. However， haptic feedback with vibration becomes? less? sensitive when? used continuously. The existing technology also has great difficulty recreating the sense of touch with objects in virtual environments or located remotely， according to Mai Thanh Thai， lead author of the study.

The? new technology overcomes issues with existing haptic devices. The research team introduced a novel method to recreate the sense of touch through soft， artificial “muscles”.

視頻通話是常事，但你是否想象過能觸碰到屏幕另一邊的人？科學家正在將其變為現實。

澳大利亞新南威爾士大學的研究人員發明了一種柔軟的皮膚拉伸裝置，這是一種可以重現觸覺的設備。觸覺技術通過刺激皮膚的局部區域，利用力、振動或者運動來模仿觸摸的體驗，達到類似于真實世界中的感覺。

振動是當下最常見的觸覺技術，已配置在了許多電子設備中。例如，附在筆記本電腦觸控板背面的設備可以模擬點擊按鈕。但是，當設備被持續使用時，振動的觸覺反饋敏感度便會下降。該研究的第一作者麥坦泰表示，現有技術也很難在虛擬環境或遠程的物體上重現觸感。

這項新技術克服了現有觸覺設備中存在的問題。研究團隊引入了一種新方法，通過柔軟的人造“肌肉”來重現觸覺。

“Our 3-Axis SSD， built into the fingertips of the wearable haptic glove we also created， is like wearing a second skin—its soft， stretchable and mimics the sense of touch— and will enable new forms of haptic communication to enhance everyday activities，” said Thanh Nho Do， senior author of the study.

It works like this： Imagine you are at home and you call your friend who is in England. You wear a haptic glove with the SSD and your friend also wears a glove with integrated 3D force sensors. If your friend picks up an object， it will physically press against your friends fingers. And their glove with 3D force sensors will measure these interactions. The force signals can be sent to your glove so your device will generate the same 3D forces， making you experience the same sense of touch as your friend.

The haptic devices could be applied in various scenarios， allowing users to feel objects inside a virtual world or at a distance. This could be especially beneficial during such times like the COVID-19 pandemic when people rely on video calls to stay connected with loved ones. Or it could be used in medical practices. Doctors can feel a patients organ tissues with surgical tools without touching them.

“我們的三軸皮膚拉伸裝置內置在我們研發的可穿戴觸覺手套的指尖上，就像戴了柔軟的可拉伸、可模擬觸覺的第二層皮膚，將使觸覺交流的新形式得以實現，以增強日常活動。”這項研究的項目負責人坦仁多表示。

它的工作原理是這樣：想象你正在家中給遠在英國的朋友打電話。你戴上配有皮膚拉伸裝置的觸覺手套，你的朋友也戴著配有集成三維力傳感器的手套。當你的朋友撿起一個物體時，這個物體就會壓在你朋友的手指上，而手套上的三維力傳感器會測量這些相互作用。這些三維力信號可以發送到你的手套上，因此你的設備也將產生相同的三維力，讓你能體驗到和你的朋友一樣的觸感。

觸覺設備可以應用于多種場景中，讓用戶感受到虛擬世界或遠距離的物體。新冠疫情期間，人們依靠視頻電話與摯愛的人保持聯系，在這些時候，觸覺設備就格外有用。它也可以用于醫療實踐中，醫生無須觸摸，通過外科醫療器械就能感受到病人的器官組織。