Design of the vehicle driver fatigue monitor system based on ARM

Abstract

Fatigue driving is refers to the driver in a long time continuous driving or physical fatigue condition, and then come into being physiological and psychological function disorder, led to a decline in driving ability. Aimed at the requirements of monitoring on the fatigue driving, this article designed an driver fatigue monitor system based STM32F407 of ARM as a controller, it used to determine the driver's fatigue and reduce the traffic accident. The system adopts the method of multi-source information fusion, by monitoring the pulse, heart rate, temperature of the human body, steering wheel grip strength to realized the fatigue level. The system of graphical interface adopts UCGUI. Finally,testing the main function modules of early warning system, verify the feasibility of the proposed early warning system. Introduction With the rapid increase of motor vehicle quantities and the road mileage increased year by year, a large number of traffic accidents caused the world huge property losses and casualties. Each year 600000 deaths and economic losses of about $12.5 billion caused by traffic accidents in the global, 57% of these accidents related to fatigue driving, Fatigue driving is the reaction levels drop after a period of time, and lead to can't normal driving, when driver is fatigue, its psychological state will also has a variety of changes, such as vision loss and causing distraction, slow in reacting, stiff action and arrhythmia, Therefore, the accurate monitoring of driver's fatigue state and implement effective early warning is of great significance to avoid fatigue driving effectively. Hardware design At present there are many research about the early-warning system of fatigue driving, But there's no a method was accepted by everyone. The main reason that although each method in one area is persuasive and operability, But it haven't reached the requirements of vehicle, real-time, objective, System with DSP kernel, the information data has high processing speed and good control performance of the 32-bit ARM processor STM32F407 as a controller, The 3.2 inch LCD screen with the small size, low power consumption as the human-computer interaction interface, figure 1 is system hardware structure diagram. Car driver fatigue early warning system for embedded hardware mainly includes STM32F407 core processor, a 3.2 -inch LCD touch screen, data storage module, data communication interface module, information collection module, sensor module and alarm device. LCD touch screen based on the system of the monitoring results show that the current driver in a sober, mild or severe fatigue, fatigue and LCD touch screen is the driver and early warning system of human-computer interaction interface, The driver turned on or off using LCD touch screen early warning system for fatigue monitoring function, it can also view the current own pulse, heart rate, body temperature and other physical information. The main functions of the system: through micro pulse sensor acquisition driver pulse signal; through a serial port communicate with tiny heart rate sensor acquisition drivers' heart rate signal; Through the infrared temperature sensor acquisition driver temperature signal; Through the thin film pressure sensor signal acquisition driver steering wheel grip; System collected the human body 5th International Conference on Information Engineering for Mechanics and Materials (ICIMM 2015) © 2015. The authors Published by Atlantis Press 1272 physiological signal data and preprocessed, then it displayed on the LCD panel, at the same time ti take the data stored in the storage module of the system. STM32F407 The heart rate sensor SD card The wheel grip strength sensor