Driving behavior analysis method based on three-axis accelerometer

An accelerometer and behavior analysis technology, applied in the field of vehicle electronics, can solve problems such as judgment result errors, achieve the effect of improving accuracy and eliminating multiple misjudgments

Active Publication Date: 2016-03-23
CHINA MERCHANTS CHONGQING COMM RES & DESIGN INST
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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 sens

Method used

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  • Driving behavior analysis method based on three-axis accelerometer

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Embodiment Construction

[0025] see figure 1 , is a flow chart of an embodiment of the driving behavior analysis method based on the three-axis accelerometer of the present invention. In the present invention, the three-axis accelerometer is arranged on the automobile, and the three-axis accelerometer is used to collect the three-axis acceleration during the driving process of the automobile, and the sliding average window is used to perform low-pass filtering and eliminate the static error on multiple groups of three-axis accelerations, and calculate and The acceleration and the acceleration components in each axis direction, when the sum acceleration exceeds a preset value, determine the maximum value of the absolute value of the acceleration components in each axis direction, so as to analyze the specific driving behavior.

[0026] In step S100, multiple sets of three-axis acceleration values ​​are collected. In this embodiment, multiple sets of three-axis acceleration values ​​(for example: (0, 1...

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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 ...

Claims

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Application Information

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IPC IPC(8): B60W40/09
CPCB60W40/09
Inventor 祖晖付建胜阮志敏王少飞陈政
Owner CHINA MERCHANTS CHONGQING COMM RES & DESIGN INST
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