Mixing method for brain-computer interface based on SSVEP and OSP

A computer interface, PO4 technology, applied in the field of brain-computer interface, can solve the problems of limited display screen refresh frequency and response amplitude, low target frequency, etc., to achieve the effect of fewer electrodes, parameter optimization of paradigm, and simple operation

Active Publication Date: 2015-10-07
深圳睿瀚医疗科技有限公司
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Problems solved by technology

Moreover, limited by the refresh rate of the display screen and the response am...

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  • Mixing method for brain-computer interface based on SSVEP and OSP
  • Mixing method for brain-computer interface based on SSVEP and OSP
  • Mixing method for brain-computer interface based on SSVEP and OSP

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Embodiment Construction

[0035] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0036] The hybrid brain-computer interface method based on SSVEP and OSP includes the following steps:

[0037] Step 1, refer to figure 1 , the subject wears the electrode cap and sits directly in front of the computer. The distance between the subject's head and the computer screen is 60-80 cm. All electrodes are placed according to the "international 10 / 20 standard lead system". The placement method is as follows: figure 2 As shown, the recording electrode is located in the occipital region of the brain, including O1, Oz, O2, POz, PO4, and PO8. The reference electrode is located in the earlobe of the left ear, and the ground electrode is Fpz. Inject conductive paste into the recording electrode, reference electrode, and ground electrode, and Make sure it is in good contact with the scalp;

[0038] Step 2, play the SSVEP-OSP mixed paradigm in front of the subject...

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Abstract

Provided is a mixing method for a brain-computer interface based on SSVEP and OSP. A subject wears an electrode cap. A SSVEP-OSP mixed paradigm is broadcast in front of the subject by means of a computer screen. The subject stares at any one of simulation units. By a collection system, an electroencephalogram signal generated when the subjects stares at a simulation target is magnified, filtered and subjected to analog-digital conversion by an electroencephalogram acquisition instrument. Digitized electroencephalogram data is inputted into a computer. An electroencephalogram signal feature extraction method based on a typical correlation analysis is adopted for extraction, classification and recognition of features of SSVEP. A support vector machine and naive bayesian algorithm are adopted for extraction and recognition of OSP features. A recognition result is displayed on the screen in order to feed back to the subject. Then neat recognition is carried out. The mixing method for the brain-computer interface based on SSVEP and OSP has following advantages: rate of information transmission of the method for the brain-computer interface is increased based on SSVEP; and the method is easy in operation, few in electrode number and many in target number.

Description

technical field [0001] The present invention relates to the technical field of Brain-Computer Interface (Brain-Computer Interface, BCI), in particular to a hybrid Brain-Computer Interface method based on SSVEP and OSP. Background technique [0002] Brain Computer Interface (BCI) is a communication system that directly converts brain activity signals into command or control signals. Using brain-computer interface technology, neuromuscular pathways can be bypassed, and brain activity signals can be directly converted into instructions or control signals to control external devices, which provides the possibility for people who have lost the ability to communicate with the outside world due to disabilities to communicate with the outside world sex. Therefore, the research on the brain-computer interface is a hot spot in the research of rehabilitation medicine in recent years. On the other hand, brain-computer interface technology has also shown important potential application...

Claims

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Application Information

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IPC IPC(8): G06F3/01
Inventor 王晶武颖莹郭晓辉徐光华
Owner 深圳睿瀚医疗科技有限公司
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