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With the idea of ​​typing, the new record of Chinese brain-computer interface was born!

via:博客园     time:2019/8/24 21:30:46     readed:95

Science and Technology Daily reporter Liu Yuanyuan Hualing

Without hands, without the keyboard, directly rely on the idea, output 691.55 bits per minute on the computer screen, equivalent to outputting 69 Chinese characters per minute.

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It outputs 691.55 bits per minute and the highest score in the Brain Control Typing Record Challenge.

Just now, China's new record using brain-computer interface technology was born in the third China Brain Machine Interface Competition!

From August 20th to 25th, the 2019 World Robotics Congress was held in Beijing. “The BCI Brain Control Robot Competition and the 3rd China Brain Machine Interface Competition” was one of the most watched events held during the conference.

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2019 Brain-controlled wheelchairs on display at the World Robotics Conference directly control brainwaves with brainwaves.

Let me briefly introduce the situation of the event.

Gao Xiaolu, deputy director of the brain-computer interface expert committee and professor of biomedical engineering at Tsinghua University Medical School, told the Science and Technology Daily reporter that the third Chinese brain-computer interface competition was divided into skill games and technical games. More than 2,000 people participated in the preliminary round of the skill competition and 40 players entered the finals. At the same time, more than 400 teams participated in the technical competition preliminary and 16 teams entered the finals.

After fierce competition in these days, the skill game decided the best brain control players from the 40 finalists, and the technical competition decided from the 16 final teams to provide the best brain-computer interface algorithm.

On the morning of the 24th, the Brain Controlling Typing Record Challenge officially began: let the best brain controllers use the best brain-computer interface algorithms to challenge new brain-control records. It's like getting the best racer, driving the best car and challenging the racing record.

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Brain Control Typing Record Challenge

A total of three players participated in the Brain Controlling Typing Record Challenge, which was the champion, runner-up, and champion of last year's event. The best brain-computer interface algorithm comes from a team of researchers from the University of Macau and the University of Hong Kong.

The creator of this challenge record is also the champion of this year's China Brain Machine Interface Competition — Wei Siwen, a second-year graduate student in the Neuroengineering and Rehabilitation Laboratory of the School of Precision Instruments, Tianjin University.

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The creator of the brain-controlled typing record is Wei Siwen, a student from the Precision Instrument Institute of Tianjin University.

On the 23rd, Weiswin won the championship with a brain-controlled typing speed of more than 500 bits per minute. On the 24th, she broke her record and brain-controlled typing speed reached 691.55 bits per minute.

Be aware that the average person typing on a touch-screen phone with his hand is 600 bits per minute. In other words, this player can use the fastest speed of typing on brain waves to type more than ordinary people using touch-screen mobile phones.

Of course, this record is also generated by the powerful brain-computer interface algorithm. Wan Feng, a professor at the University of Macau School of Science and Technology, and Professor Hu Yong from the University of Hong Kong School of Medicine, told the Science and Technology Daily reporter that the brain-computer interface algorithm developed by the University of Macau and the research team of the University of Hong Kong applied advanced machine learning methods and adaptive optimization. Strategy.

Wan Feng and Hu Yong introduced that by setting up the system, the brain control typing speed achieved by the contestants can be faster, but this will increase the player's brain fatigue. Tests show that with this algorithm, ordinary people can use brainwaves to type at speeds of 200 to 300 bits per minute, and more than 20 Chinese characters.

“The brain-computer interface paradigm used in the Brain Controlling Typing Record Challenge is the SSVEP paradigm, which is a paradigm for Chinese researchers to independently develop brain-computer interfaces. It has been listed in the three paradigms of the international brain-computer interface field with the P300 paradigm proposed by American researchers and the motor imagination paradigm proposed by European researchers. & rdquo; Gao Xiaoyu told the Science and Technology Daily reporter.

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The brain caps used by the players belong to the non-invasive brain-computer interface device.

The preparatory staff of the event, Wu Yulin, a research assistant at Tsinghua University Medical School, said that in this paradigm, the characters appearing on the screen are encoded at different frequencies. When the player wears a headgear to see the flashing characters on the screen, different frequencies are given. Vision brings different stimuli and produces different brainwave signals. When the brain computer interface device captures and recognizes the brain wave signal, it will output the target character to the screen.

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The staff injected a conductive paste into the brain cap to reduce the resistance to transmit EEG signals.

What is the future use of brainwave typing?

In Wanfeng's view, the future application scenarios will be very extensive. For example, an astronaut may need to perform multiple operations at the same time in a spaceship so that he can use the brainwaves to make other operations.

For example, in a video game scene, when the player is in a showdown, there is no need to operate with a mouse or a keyboard, and it is only necessary to stare at the "enemy" on the screen to attack it.

“The current application of brain-computer interface in the practical field is not particularly mature, but it has been possible to do some demonstrations in the laboratory. & rdquo; Wan Feng said.

Source: Science and Technology Daily Image courtesy of the author

Editor: Chen Xiaoyu

Audit: Guan Jingjing

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