基于眼动信号的便携式无线智能交互系统设计

doi:10.3969/j.issn.0258-8021.2019.05.008

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Abstract Patients with motor impairment are unable to control modern electronic devices (mobile phones, iPAD, etc.) to communicate with the outside world. It is difficult for them to integrate into information-based society. In this paper, a portable wireless intelligent interactive system was designed to help users control electronic devices with their own eye movement signals to help them communicate with the outside world. The system was made up of analog and digital circuits. The analog circuit was used for filtering and amplification. The digital circuit was used to convert analog signals to digital signals, and then the digital signals were analyzed and processed in real time. It included using short-term energy endpoints to obtain starting and ending positions of signal activity segments, selecting location, amplitude, and wave peak number as signal characteristics, and then using zero-crossing analysis and dynamic threshold method to identify different types of eye movement signals. At last a state machine was used to define the corresponding relationship between different types of eye signals and mouse movements in the electronic devices. Fifteen subjects were enrolled for the test, they were required to control five different eye movements according to random instructions, including looking up, down, left, right and active blinking, and each action was performed 100 times in total. Results showed that the average accuracy of each eye movement was more than 94%, and the minimum average information transfer rate was more than 22 bits/min. In conclusion, this system could use the eye movement to replace the mouse to control electronic devices, realizing functions of character input, making phone calls, listening to music, and browsing the web.

Key words： eye movement signal intelligent interactive system portable

Received: 11 September 2018

PACS:

R318

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	Articles by authors
	Gao Dongrui
	Wang Rungui
	Ying Shaofei
	Jiang Dong
	Chen Jiaxin
	Zong Xin
	Dong Lijuan
	Song Xiaoyu
	Wang Lutao

Cite this article:

Gao Dongrui,Wang Rungui,Ying Shaofei, et al. Design of Portable Wireless Intelligent Interactive System Based on Eye Movement Signal[J]. Chinese Journal of Biomedical Engineering, 2019, 38(5): 573-580.

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http://cjbme.csbme.org/EN/10.3969/j.issn.0258-8021.2019.05.008 OR http://cjbme.csbme.org/EN/Y2019/V38/I5/573

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