System and method for detecting lateral driving state based on smart-phone

Abstract

The invention discloses a system for detecting the lateral driving state based on a smart-phone. The system comprises a data acquisition module, a data conversion module, a lateral driving trend judgment module and a lateral driving state abnormity determining module, wherein the data acquisition module is used for acquiring data acquired by an accelerometer, a direction sensor and a gyroscope of a smart-phone placed in an automobile; the data conversion module is used for converting the data acquired by the data acquisition module into state information of the automobile, including the longitudinal acceleration, the lateral acceleration and the yaw velocity of the automobile, and converting the lateral acceleration of the automobile into the characteristic quantities, including the lateral driving frequency and lateral driving width, for representing driving behaviors of a driver in the lateral driving state; the lateral driving trend judgment module is used for judging whether the lateral driving trend of the automobile according to the longitudinal acceleration and the yaw angle of the automobile; the lateral driving state abnormity determining module is used for judging whether the lateral driving state is abnormal according to the lateral driving frequency and lateral driving width. The system uses a sensor of the smart-phone to detect the lateral driving state of a driver without other equipment, so that the cost is low, other installations are not needed, and the measured data is high in accuracy.

Description

technical field [0001] The invention relates to the field of automobile auxiliary driving, in particular to a smart phone-based lateral driving state detection system and method. Background technique [0002] With the improvement of people's living standards, automobiles are becoming more and more popular as a fast and flexible means of transportation. Nowadays, the popular use of automobiles has gradually improved its various performances such as comfort, safety and environmental adaptability. Safety has aroused people's special attention. Along with the increase of automobile number in the city, traffic accident also just takes place frequently. According to statistics, the number of traffic accident deaths in China ranks second in the world after the United States, and more than 80% of the traffic accidents are caused by the driver's unresponsiveness. Therefore, it is of great significance and effect to improve traffic safety to vigorously research and develop vehicl...

AI Technical Summary

Problems solved by technology

The existing patent (publication number CN 102442314 A) provides a method for sensing and recording the movement characteristics of a car based on a smartphone. This invention senses the acceleration of the car through the accelerometer of the smartphone, and senses the turning direction of the car through the direction sensor of the smartphone. Angle, this invention takes advantage of the smart phone to a certain extent, but this method requires that the coordinate system of the smart phone must coincide with the car coordinate system when using it, but in fact, this situation is difficult to achieve, so this invention has limitations In addition, the invention is only used to detect the acceleration and deceleration and turning angle of the car, and does not involve other car states

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