Device for extracting eye blinking times by brain waves and method

A brain wave and eye technology, applied in the electronic field, can solve problems such as submersion, achieve the effects of reducing traffic accidents, simplifying the data processing process, and simplifying head positioning

Pending Publication Date: 2015-11-04
MINNAN NORMAL UNIV
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AI Technical Summary

Problems solved by technology

Because after the θ (Theta) wave is transmitted over a certain distance, its waveform is easily overwhelmed by the interference signal in the transmission process, which makes it impossible to directly judge the human eye blinking situation through the amplitude change of the θ (Theta) wave

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  • Device for extracting eye blinking times by brain waves and method
  • Device for extracting eye blinking times by brain waves and method

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Embodiment Construction

[0023] A method for extracting the number of eye blinks with brain waves of the present invention comprises the following steps:

[0024] The collected mixed brain waves are subjected to frequency-selective filtering, and delta waves, alpha waves, and beta waves are filtered out to obtain theta waves;

[0025] Limiting processing is performed on the θ wave obtained above to obtain an effective eye blink signal with an amplitude within a preset range. Specifically, the effective eye blink signal has an amplitude range of 5 to 28 μV, including the two end values ​​of 5 μV and 28 μV ( The two end values ​​are specifically based on a certain number of people as a sample, and the brain waves and the number of eye blinks are collected for them, and then obtained through comparison and statistical analysis);

[0026]Filter out the interference signals that do not meet the requirements of the eye blink amplitude in the effective eye blink signals obtained above, that is, filter out th...

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Abstract

The invention discloses a device for extracting eye blinking times by brain waves and a method. The device comprises a brain wave acquisition unit, a frequency selecting filter unit, an amplitude limiting unit and a delay shaping unit, wherein the brain wave acquisition unit transmits the acquired mixed brain wave signal of a person to the frequency selecting filter unit; the output of the frequency selecting filter unit is connected with the input of the amplitude limiting unit; the output of the amplitude limiting unit is connected to the input of the delay shaping unit; the amplitude limiting unit transmits an acquired amplitude-limited effective eye blinking signal to the delay shaping unit; and the delay shaping unit processes the amplitude-limited effective eye blinking signal to obtain an eye blinking representing pulse signal. A method comprises the following steps of performing frequency selecting filter processing, amplitude limiting processing, jamming signal removal and delay shaping processing on the acquired mixed brain wave of the person to obtain the eye blinking representing pulse signal. The device is simple in data processing process and simple in head positioning, can be used for checking fatigue of a driver and is favorable for reducing the traffic accident rate.

Description

technical field [0001] The invention relates to the field of electronic technology, in particular to a device and method for extracting the number of eye blinks by using brain waves. Background technique [0002] According to a large number of statistics, about half of the traffic accidents in many countries are caused by drivers being too tired to doze off. In order to reduce the incidence of traffic accidents caused by this aspect, the Traffic Management Bureau of the Ministry of Public Security requires drivers not to drive motor vehicles continuously for more than 4 hours, and to rest for at least 20 minutes every 4 hours of continuous driving. From a medical point of view, changes in the physiological signal of brain waves can reflect people's fatigue. Specifically, the human brain continuously produces four rhythmic waves: δ, θ, α and β waves. The state of consciousness of a person depends on Which wave is dominant. To put it simply, when a person is in deep sleep, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/18A61B5/0476
Inventor 许陵张灵聪黄锦标高颖
Owner MINNAN NORMAL UNIV
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