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On-line processing method of motor imagery EEG signal

A technology of motion imagery and processing methods, applied to instruments, character and pattern recognition, computer components, etc., can solve the problems that the research level stays in the offline analysis stage, and the online processing system has not been widely developed and applied.

Pending Publication Date: 2020-06-02
HARBIN INST OF TECH
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  • Application Information

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Problems solved by technology

Due to various factors, at present, most of the research on motor imagery EEG signals stays in the offline analysis stage, and its online processing system has not been widely developed and applied.

Method used

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  • On-line processing method of motor imagery EEG signal
  • On-line processing method of motor imagery EEG signal

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specific Embodiment approach 1

[0029] Specific embodiment one: the online processing method of a kind of motor imagery EEG signal described in this embodiment comprises offline training part and online processing part, such as figure 1 and 2 shown.

[0030] During the processing, the trained subjects should be selected, and the subjects should be kept the same in the same offline training and online processing experiments. Connect the EEG signal amplifier to the brain of the subject. Participants performed motor imagery with the aid of a motor imagery prompt program running on a computer screen. The prompt program can be designed according to the brand and model of the amplifier used. In this embodiment, a 16-channel EEG signal amplifier is used, and the sampling frequency is 1000 Hz. According to the parameters of the amplifier, a prompt program is designed using C++. The specific prompt steps of the prompt program are as follows: at the beginning of the experiment, a picture with the word "ten" writte...

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Abstract

The invention discloses an online processing method of a motor imagery EEG signal, and relates to the field of online processing of EEG signals in a BCI system. The invention aims to achieve the purpose of online processing of motor imagery EEG signals. The invention discloses an on-line processing method of a motor imagery EEG signal. The on-line processing method comprises an off-line training part and an on-line processing part. Collecting the electroencephalogram data of the fixed group number of the testees through offline training, and carrying out offline analysis, so as to obtain the optimal model corresponding to the corresponding testees. And the online processing module is used for processing the tested electroencephalogram data acquired in real time according to the obtained model. The real-time performance and classification accuracy requirements of the system are comprehensively considered, the same algorithm is used for offline training and online processing, an optimalmodel is obtained through offline training and imported into an online processing program, and then the time delay of the online processing program is reduced.

Description

technical field [0001] The invention belongs to the field of online processing of EEG signals in a BCI system. Background technique [0002] At present, the BCI (Brain Computer Interface, brain-computer interface technology) system has some applications in many fields such as medical treatment and technology. Human brain signals include various types of EEG (electroencephalogram) signals, such as P300, SSVEP (steady-state visual evoked potential) and motor imagery EEG signals. These directions have achieved many results in years of research. There are more and more methods for offline analysis of EEG signals, and the results have also improved. Relatively speaking, the application scope of the online processing system is still very narrow. Due to the large differences among human individuals, the complexity of EEG signals and the influence of environmental factors, the online processing system needs to balance between real-time and complexity, which restricts the practical...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/62
CPCG06F18/24765G06F18/2411G06F18/214
Inventor 李卓明代峥李华清叶亮伍广腾岑尧辉陈幸
Owner HARBIN INST OF TECH