A method for judging a sharp turn of a vehicle based on a three-axis acceleration sensor

Abstract

The invention discloses a method for judging a sharp turn of a vehicle on the basis of a three-axis acceleration sensor. The method comprises the following steps of first, fixedly mounting the three-axis acceleration sensor on the vehicle and obtaining an three-axis acceleration reading of the three-axis acceleration sensor so as to figure out modulus of a resultant acceleration; next, figuring out an acceleration component on a horizontal plane according to the modulus of the resultant acceleration; and then obtaining an acceleration component of the vehicle in a forward direction so as to figure out a lateral acceleration of the vehicle in a direction vertical to the forward direction of the vehicle; and finally, comparing the lateral acceleration with a set threshold; and if the lateral acceleration is larger than the threshold, judging the event of the vehicle as a sharp turn event. The method for judging the sharp turn of the vehicle on the basis of the three-axis acceleration sensor, disclosed by the invention, has the advantages of simple calculating process, small calculated amount, low cost, convenience in mounting as well as simplicity and convenience in use. The method for judging the sharp turn of the vehicle on the basis of the three-axis acceleration sensor, disclosed by the invention, is also advantaged in that the mounting position of the three-axis acceleration sensor is not limited and initial directions of three axes are random.

Description

technical field [0001] The invention belongs to the field of vehicle monitoring, and in particular relates to a method for judging a sharp turn of a vehicle based on a three-axis acceleration sensor. Background technique [0002] With the development of society and the improvement of people's living standards, more and more people own cars, and the increase in the number of cars also leads to an increase in traffic accidents. In the process of handling traffic accidents, the driving state when an accident occurs is a very An important analysis method, which can be used to analyze whether the driving behavior is illegal. The driving status includes rapid acceleration, rapid deceleration, and sharp turns. On the other hand, with the development of the Internet of Vehicles industry, vehicle-mounted terminals based on vehicle OBD (On-Board Diagnostics) interfaces are increasingly used in vehicle UBI (Usage Based Insurance). Its main function is to collect vehicle condition data ...

AI Technical Summary

Problems solved by technology

[0003] Among them, the detection of sharp turns is relatively complicated to implement. Some of the existing sharp turn detections use gyroscopes to detect the cornering angular velocity, such as the open patent: CN102211612A. Although it is relatively simple to implement, the cost is relatively high; The acceleration sensor is used for detection, such as the public patent: CN101743574B, but vector calculation is generally used, the calculation process is complicated, the calculation amount is large, and the initial state calibration is usually required after installation

Images