CN105212924A - A kind of based on brain wave method for detecting fatigue driving and device thereof - Google Patents
A kind of based on brain wave method for detecting fatigue driving and device thereof Download PDFInfo
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Abstract
A kind of based on brain wave method for detecting fatigue driving and device thereof, relate to fatigue detecting technology field, it is characterized in that: comprise the following steps, acquiring brain waves: often gather θ ripple, α ripple, the β ripple in brain wave respectively simultaneously in each 0.6 ~ 2 second, continue more than three seconds; Brain wave transmits: be passed in computer by the θ ripple in above-mentioned brain wave, α ripple, β wavelength-division supplementary biography; Brain wave is analyzed: analyzed by the time of P value and driving, described P value=(θ value+α is worth)/β value, the described time is daytime and night respectively; Comprise acquiring brain waves module, brain wave processing module and judge warning module, described acquiring brain waves module sends the brain wave of collection to brain wave processing module by bluetooth, and described brain wave processing module sends the signal of collection to judgement warning module.By brain wave, the present invention judges whether driver is in fatigue state, easy to detect, reliability is high, is conducive to reducing security incident.<!-- 2 -->
Description
Technical field:
The present invention relates to fatigue detecting technology field, specifically a kind of based on brain wave method for detecting fatigue driving and device thereof.
Background technology:
Brain wave (Electroencephalogram, EEG) be brain when activity, the postsynaptic potential that a large amount of neuron synchronously occurs is formed after summation.Electric wave change during its record cerebral activity is overall anti-in cerebral cortex or scalp surface of the bioelectrical activity of cranial nerve cell.Brain wave derives from the postsynaptic potential of pyramidal cell top dendron.The formation of the synchronization of brain wave rhythm and pace of moving things is also relevant with the activity of cortex thalamic nonspecific projection system.Brain wave is that some spontaneous rhythmic neuroelectricities are movable, its frequency variation scope is between 1-30 time per second, four wave bands can be divided into, i.e. δ (1-3Hz), θ (4-7Hz), α (8-13Hz), β (14-30Hz).In addition, when awakening and be absorbed in a certain thing, the γ ripple that a kind of frequency of Chang Kejian is higher compared with β ripple, its frequency is 30 ~ 80Hz, and wave amplitude scope is indefinite; And also can there is the normal brain activity electric wave that other waveforms are comparatively special, as hump ripple, σ ripple, λ ripple, κ-complex wave, μ ripple etc. when sleeping.Also not do not detect based on brain wave the method and apparatus whether driver is in fatigue state in prior art, or whether to be in the reliability of the method for fatigue state poor for detecting driver.
Summary of the invention:
Technical problem to be solved by this invention is to provide a kind of easy to detect, reliability high based on brain wave method for detecting fatigue driving and device thereof.
Technical problem to be solved by this invention realizes by the following technical solutions:
One, based on brain wave method for detecting fatigue driving, is characterized in that: comprise the following steps,
Acquiring brain waves: often gather θ ripple, α ripple, the β ripple in brain wave respectively simultaneously in each 0.6 ~ 2 second, continue more than three seconds;
Brain wave transmits: be passed in computer by the θ ripple in above-mentioned brain wave, α ripple, β wavelength-division supplementary biography;
Brain wave is analyzed: analyzed by the time of P value and driving, described P value=(θ value+α is worth)/β value, the described time is daytime and night respectively;
Tired judgement:
Daytime:
Represent that driver is in waking state as P<=1.2;
Represent that driver is in fatigue state as 1.2<P<=1.5;
Represent that as P>1.5 driver will enter sleep state;
Night:
Represent that driver is in waking state as P<=1.05;
Represent that driver is in fatigue state as 1.05<P<=1.35;
Represent that as P>1.35 driver will enter sleep state.
A kind of based on brain wave method for detecting fatigue driving and device thereof, comprise acquiring brain waves module, brain wave processing module and judge warning module, described acquiring brain waves module sends the brain wave of collection to brain wave processing module by bluetooth, and described brain wave processing module sends the signal of collection to judgement warning module.
Brain wave is that some spontaneous rhythmic neuroelectricities are movable, its frequency variation scope is between 1-30 time per second, four wave bands can be divided into, i.e. δ (1-3Hz), θ (4-7Hz), α (8-13Hz), β (14-30Hz).
δ wave frequency is 0.5 ~ 3Hz, and amplitude is 20 ~ 200 μ V.When people at infancy stage or intelligent development is immature, adult under extremely tired and lethargy or narcotism, this wave band can be recorded at temporal lobe and top.
θ wave frequency is 4 ~ 7Hz, and amplitude is 100 ~ 150 μ V.Adult when wish suffers setbacks and is depressed and this ripple of psychotic very remarkable.But this ripple is the main component in the electroencephalogram of juvenile (10-17 year).
α wave frequency is 8 ~ 13Hz (average is 10Hz), and amplitude is 20 ~ 100 μ V.It is the basilic rhythm of normal brain electric wave, if do not have additional stimulation, its frequency is quite constant.People clear-headed, quiet and when closing one's eyes this rhythm and pace of moving things the most obvious, open eyes (being subject to photostimulation) or accept other when stimulating, α ripple disappears at once.
β wave frequency is 14 ~ 30Hz, and amplitude is 5 ~ 20 μ V.When psychentonia and excited or excited time there is this ripple, when people wakes from a nightmare with a start, the slow wave rhythm and pace of moving things originally can immediately substitute by this rhythm and pace of moving things.
Acquiring brain waves module can gather E.E.G frequency spectrum, EEG signals quality, original brain wave and three eSense parameters: focus, allowance and detecting nictation.
Acquiring brain waves module is the eeg signal of captured in real time experiencer.The eeg signal acquisition module that we use is ThinkGearAM module or TGAM module, and the current potential at forehead electrode and ear-lobe place is obtained brain wave data by this module as a reference.Under TG_BAND_9600 baud rate, every 0.6s acquiring brain waves module acquires to the information maximum probability that can change, namely between 0 to 0.6s acquiring brain waves module acquires to information be identical, for avoiding other factors to disturb, we use the information once collected to carry out processing and the degree of fatigue judging experiencer every 1s.
Brain wave processing module is that we utilize acquiring brain waves module to catch the eeg signal of user, then process, filter out the E.E.G frequency spectrum of our needs, EEG signals quality, original brain wave and eSense parameter and transmitted it in computer by the blue-tooth device that acquisition module is built-in.After acquisition signal, we pass to exe program by the signal that bluetooth receives by serial port communication technology, and this program carrys out extraction and analysis by the function library (data stream parser API) calling acquiring brain waves module and provide and packet, and we need signal to be processed.
Judge warning module: the brain wave that we use is θ, α, β ripple, δ ripple is because have more present infancy stage or intelligent development immature period, so we do not go to use.Detect through great many of experiments that known fatigue state α ripple can rise, β ripple can decline when people is in; When people enters sleep state from fatigue state, θ ripple can increase, so we judge the fatigue strength of driver by P=(θ+α)/β formula.This money software is divided into two kinds of patterns: day mode and Night.Wherein, the attention level requirement of day mode to driver is lower, and the requirement of Night to driver is higher.According to driver, within a period of time, the change of (3 seconds) P value carrys out voice reminder driver and concentrates on.In addition, software also has warning function, and it is predicted according to the P value decline curve of driver, driver be about to enter the fatigue phase before remind driver to stop rest.
The invention has the beneficial effects as follows: by brain wave, the present invention judges whether driver is in fatigue state, easy to detect, reliability is high, be conducive to reducing security incident.
Detailed description of the invention:
The technological means realized to make the present invention, creation characteristic, reaching object and effect is easy to understand, below in conjunction with instantiation, setting forth the present invention further.
One, based on brain wave method for detecting fatigue driving and device thereof, comprises the following steps,
Acquiring brain waves: often gather θ ripple, α ripple, the β ripple in brain wave respectively simultaneously in each 1 second, continue more than three seconds;
Brain wave transmits: be passed in computer by the θ ripple in above-mentioned brain wave, α ripple, β wavelength-division supplementary biography;
Brain wave is analyzed: analyzed by the time of P value and driving, described P value=(θ value+α is worth)/β value, the described time is daytime and night respectively;
Tired judgement:
Daytime:
Represent that driver is in waking state as P<=1.2;
Represent that driver is in fatigue state as 1.2<P<=1.5;
Represent that as P>1.5 driver will enter sleep state;
Night:
Represent that driver is in waking state as P<=1.05;
Represent that driver is in fatigue state as 1.05<P<=1.35;
Represent that as P>1.35 driver will enter sleep state.
A kind of based on brain wave method for detecting fatigue driving and device thereof, comprise acquiring brain waves module, brain wave processing module and judge warning module, acquiring brain waves module sends the brain wave of collection to brain wave processing module by bluetooth, and brain wave processing module sends the signal of collection to judgement warning module.
More than show and describe ultimate principle of the present invention and principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and description just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection domain is defined by appending claims and equivalent thereof.
Claims (2)
1. based on a brain wave method for detecting fatigue driving, it is characterized in that: comprise the following steps,
Acquiring brain waves: often gather θ ripple, α ripple, the β ripple in brain wave respectively simultaneously in each 0.6 ~ 2 second, continue more than three seconds;
Brain wave transmits: be passed in computer by the θ ripple in above-mentioned brain wave, α ripple, β wavelength-division supplementary biography;
Brain wave is analyzed: analyzed by the time of P value and driving, described P value=(θ value+α is worth)/β value, the described time is daytime and night respectively;
Tired judgement:
Daytime:
Represent that driver is in waking state as P<=1.2;
Represent that driver is in fatigue state as 1.2<P<=1.5;
Represent that as P>1.5 driver will enter sleep state;
Night:
Represent that driver is in waking state as P<=1.05;
Represent that driver is in fatigue state as 1.05<P<=1.35;
Represent that as P>1.35 driver will enter sleep state.
2. one according to claim 1 is based on brain wave fatigue driving detection device, it is characterized in that: comprise acquiring brain waves module, brain wave processing module and judge warning module, described acquiring brain waves module sends the brain wave of collection to brain wave processing module by bluetooth, and described brain wave processing module sends the signal of collection to judgement warning module.
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Cited By (3)
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| CN105701973A (en) * | 2016-04-26 | 2016-06-22 | 成都远控科技有限公司 | Fatigue detection and early warning method based on brain wave acquisition and system thereof |
| CN108418959A (en) * | 2018-02-11 | 2018-08-17 | 广东欧珀移动通信有限公司 | Electronic device, method for outputting prompt information and related product |
| CN108877150A (en) * | 2018-07-05 | 2018-11-23 | 张屹然 | A kind of tired driver driving monitoring device based on biological brain electrical chip and tired distinguished number |
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