A driving fatigue discrimination method based on the rr interval of the driver's heart rate
A discrimination method and driving fatigue technology, applied in the field of traffic safety, can solve the problems of different criteria for driver fatigue discrimination, difficulty in determining driving fatigue discrimination criteria, large fatigue discrimination error, etc., and achieve the effect of solving different fatigue discrimination criteria.
Inactive Publication Date: 2020-02-07
JILIN UNIV
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[0005] 2. Different standards for fatigue judgment due to individual driver differences
Driving fatigue is defined according to the subjective feelings of the driver. Due to the influence of factors such as the driver's age, gender, and driving experience, it is difficult to determine the criteria for judging driving fatigue.
Therefore, the problem of large fatigue discrimination errors caused by individual differences in drivers has always been a difficulty in driving fatigue discrimination.
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[0033] Such as figure 1 As shown, the driver's fatigue discrimination method based on the electrocardiographic RR interval of the present invention specifically includes the following steps:
[0034] Step 1, data acquisition and preprocessing: the flow process includes setting up the real vehicle road test platform successively, and this platform includes the U.S. Biopac physiological recorder and the computer connected with it; Gather the driver's electrocardiographic signal; Utilize the software analysis module of the Biopac physiological recorder to select hemodynamics-ECG interval Extraction, preprocessing the driver's ECG signal to obtain the time series of the driver's ECG RR interval{x 1 ,x 2 ,...,x T}, T is the total number of ECG RR interval samples collected from the initial moment to the current moment;
[0035] Step 2, set the initial count value level=1; calculate the sequence structure residual u corresponding to time t according to the stationarity model form...
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The invention relates to a driving fatigue discrimination method based on the RR interval of the driver's electrocardiogram. The method includes: collecting the electrocardiographic signal of the driver and extracting the RR interval of the electrocardiogram; Corresponding sequence structure residual; calculate the autoregressive residual sequence corresponding to each moment according to the first-order autocorrelation model; calculate the condition corresponding to each moment in the conditional variance sequence according to the GARCH(1,1) model of the conditional variance Variance: According to the conditional variance corresponding to the current moment, it is judged whether the fatigue level of the driver changes. The invention solves the problems of excessive subjectivity in judging driving fatigue and different judging standards due to individual differences in the prior art, and has strong objectivity and universal applicability.
Description
technical field [0001] The invention belongs to the field of traffic safety and relates to a driving fatigue discrimination method based on the RR interval of the driver's heartbeat. Background technique [0002] When the driver is in a fatigue state, it is very easy to make mistakes in observation, judgment and manipulation, which will lead to traffic accidents. According to the statistics of the American National Traffic Safety Association, 28% of traffic accidents are caused by driving fatigue. Therefore, it is of great significance to timely identify the driver's fatigue state and give an early warning to prevent traffic accidents. [0003] In order to be able to identify driving fatigue in a timely manner, some drivers' own physiological indicators and vehicle motion parameters should be used to detect and warn of driving fatigue. However, there are several deficiencies in the existing driving fatigue discrimination: [0004] 1. The definition of the threshold value ...
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IPC IPC(8): A61B5/18A61B5/0456A61B5/352
CPCA61B5/18A61B5/7235A61B5/7264A61B5/352
Inventor 王琳虹王运豪李静伟郭梦竹柴萌
Owner JILIN UNIV