Driving behavior analysis method based on three-axis accelerometer

Abstract

The invention discloses a driving behavior analysis method based on a three-axis accelerometer. The three-axis accelerometer is arranged on an automobile. The method comprises the following steps that a plurality of sets of three-axis accelerations are collected; low-pass filtering is carried out on the multiple sets of three-axis accelerations in a moving average manner; the average value of the multiple sets of three-axis accelerations obtained after filtering is calculated; the average value and expectation values (0,0,g) are subjected to subtraction to work out the static error, and the three-axis accelerations obtained after low-pass filtering and the static error are subjected to subtraction to eliminate the static error; the average value of the multiple sets of three-axis accelerations without the static error is calculated; sigma point moving average window filtering is carried out on the characteristic quantity; and the maximum value among the absolute values of the characteristic quantities exceeding the preset value and including Hx, Hy and Hz is judged so that the corresponding driving behavior can be judged, the sum acceleration is not sensitive to the intermediate frequency or the high frequency, data are locked when the sum acceleration exceeds the preset value, and therefore multiple times of misjudgment caused by high-frequency shaking is eliminated, and the accuracy of the driving behavior is improved.

Description

technical field [0001] The invention relates to the technical field of vehicle electronics, in particular to a driving behavior analysis method based on a three-axis accelerometer. Background technique [0002] With the rapid development of my country's economy and the continuous improvement of people's living standards, the number of vehicles has increased rapidly, and the number of vehicle traffic accidents remains high. Therefore, cultivating good driving habits of drivers is extremely important for safe driving of vehicles. [0003] The formation of driving habits lies in the accumulation of driving behaviors. Therefore, the key to developing driving habits is to detect driving behaviors. At present, the driving behavior analysis methods all use linear accelerometers to measure vehicle acceleration. After low-pass filtering the raw acceleration data, the number of times the acceleration in each direction jumps over the preset acceleration threshold is counted, and then ...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that the existing driving behavior analysis method is based on the acceleration, the acceleration is a very sensitive signal, and the disturbance of the medium frequency or high frequency will cause a large error in the judgment result. behavior analysis method

Images