Research Of Driver’s Fatigue Detection System Based On FPGA

Along with the global economy development, living standard of citizens isexperiencing an obvious enhancement. Automobile becomes the commodity forordinary people that results in the automobile storage increases year by year whichmakes the transportation pressure more serious, and leads to more various trafficaccidents. Traffic violations such as unlicensed driving, overloading, speeding, drinkdriving, fatigue driving and some other risking driving activities often cause trafficaccidents. Thereinto, accidents caused by fatigue driving have the largest proportion,and are often serious than that caused by others.This paper is based on such considerations, and develops a driver’s fatiguedetection device which can be easily equipped on vehicles to monitor driver’s eyelidclosure status in real time. It can issue a early warning to drivers when they are infatigue. This device has no effect in terms of physiology and mentality. And it can avoidaccidents caused by fatigue driving effectively.On the basis of comprehensive survey on research status, this paper designed afatigue driving detection system scheme, including design light source, select camera,analog-to-digital conversion, data acquisition and display of the video signals,accomplish the Perclos-fatigue driving detection process. Mixed infrared with850nmwavelength and940nm wavelength is used to enhance the reflection of the retina. The“bright pupil” phenomenon produced by the retina is that retina reflects the90%of theincident light when a radiation of850nm wavelength hit the retina, but reflects the40%of the incident light when a radiation of940nm wavelength hit the retina. So we can gettwo very resemble images except the retina area with two cameras covered with a850nm narrowband filter and a940nm narrowband filter separately. Then after positionproofreading and differencing, we get a driver’s face image with bright retina and blackbackground. It can reduce the complexity in the later operation effectively. In order tomeet instantaneity, a FPGA chip with super strong parallel processing capability is used.Controlling and processing video signals is designed in a single FPGA chip, driver’seyelid closure status can be monitored in real time. This paper provides a feasibilityreport for driver’s fatigue detection.