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Imagine winking, lights on, winking, lights off ... Chinese scientists recently reported the design of a new type of sensor that can be attached to the glasses to detect blinking movements so that the "blinking" switch between the home Electrical and other daily tasks become a reality.
"The technology can be considered as having a 'third hand.'" Professor Hu Chenguo, one of the study leaders, told Xinhua News Agency reporters. She said that if the normal person's hands are occupied, this new type of human-computer interaction can be used to control the nearby electronic devices. Patients who have lost their mobility due to diseases such as dementia can also benefit from this. In the future, Sensors installed in different parts of the human body, try to manipulate the intelligent robot.
In addition to Hu Chenguo, Pu Xianjie of Chongqing University, Guo Hengyu and Beijing Institute of Nano Energy, Chinese Academy of Sciences Professor Wang Zhonglin and others involved in the study, the paper published in the new issue of the United States, "Science Progress" magazine.
According to Hu Chenguo introduction, the traditional human-computer interaction system in the detection of blinking movements, the main probe is very faint body surface bioelectric signals, and they use the recent hot friction nano-power generation technology to design a new sensor to detect the blink of an eye Caused by the skin near the temple movement, not only the high sensitivity, and compared to the traditional detection methods also have better durability and stability.
She explained that the sensor consists of two layers of film, with a certain distance in between. Sensor installed in the glasses legs, contact the skin near the corner of the eye. When the eyes blink, the skin around the corner of the eye to produce a small movement, will make contact with the two films; blink after the eyes open, the two films will be separated. The back of the film prepared by a conductive layer, you can produce a blink of the pulse corresponding to the electrical signal output.
Test results show that the pulse of the output signal strength and the blink of an eye has a direct relationship between the strength and speed. Compared with conscious blinking, unconscious blinking is relatively minor, the pulse signal intensity is small, so the two are easier to distinguish.
In addition to controlling the switch of the electronic device by blinking, the design can also input on the virtual typing interactive interface, for example, type English words and space symbols to form a sentence. Due to the extremely high sensitivity and stability of the sensor, the accuracy of these tasks is high.
Hu Chenguo said he plans to further improve the blink input method system in the future so as to input arbitrary sentences in this way, including switching between Chinese and English, input numbers and punctuation marks, and can also automatically associate commonly used phrases with the input method, just like the present People can do that on ordinary computer keyboards. In addition, researchers also hope to achieve more complex applications such as remote-controlled smart devices through a combination of two blinks.
Hu Chenguo pointed out that sensory-controlled human-computer interaction can create new ways of natural communication between people and external devices and improve people's quality of life. This work "makes the control of electronic devices by blinking promising from experiments Room to our daily life. "
The original title: Chinese scientists developed a "blink" switch appliances sensor
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May 02, 2023