Assessment Of Driver'S Drowsiness Based On Fractal Dimensional Analysis Of Sitting And Back Pressure Measurements

Keywords

Back pressure; Crash; Drowsiness; Fractal dimension; Nonlinear dynamics; Self-similarity; Sitting pressure; Unpredictability

Abstract

The most effective way of preventing motor vehicle accidents caused by drowsy driving is through a better understanding of drowsiness itself. Prior research on the detection of symptoms of drowsy driving has offered insights on providing drivers with advance warning of an elevated risk of crash. The present study measured back and sitting pressures during a simulated driving task under both high and low arousal conditions. Fluctuation of time series of center of pressure (COP) movement of back and sitting pressure was observed to possess a fractal property. The fractal dimensions were calculated to compare the high and low arousal conditions. The results showed that under low arousal (the drowsiness state) the fractal dimension was significantly lower than what was calculated with high arousal. Accumulated drowsiness thus contributed to the loss of self-similarity and unpredictability of time series of back and sitting pressure measurement. Drowsiness further reduces the complexity of the posture control system as viewed from back and sitting pressure. Thus, fractal dimension is a necessary and sufficient condition of a decreased arousal level. It further is a necessary condition for detecting the interval or point in time with high risk of crash.

Publication Date

11-29-2018

Publication Title

Frontiers in Psychology

Volume

9

Issue

NOV

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.3389/fpsyg.2018.02362

Socpus ID

85057503428 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/85057503428

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