Detection method and device for side rollover and collision of vehicle, as well as applications of detection method and device

Abstract

The invention discloses a detection method and device for side rollover and collision of a vehicle, as well as applications of the detection method and device. The detection method comprises the following specific steps of: 1) collecting acceleration values of an X-axis, a Y-axis and a Z-axis, performing vector synthesis on the acceleration values of two of the axes, and then respectively going on a step 2) to perform collision judgment and a step 3) to perform side rollover judgment; 2) judging whether a synthesized acceleration value is greater than a collision acceleration threshold, if yes, determining that a collision occurs, and if not, determining that no collision occurs, and returning to the step 1); and 3) performing a trigonometric function calculation by using the synthesized acceleration value, a gravitational acceleration value and the acceleration value of another axis to obtain at least three inclination angles, taking an average inclination angle, and judging whether side rollover occurs. According to the detection method and device as well as the applications thereof disclosed by the invention, vehicle collision strength is calculated through a vector synthesis method, a vehicle side rollover angle is calculated through a vector decomposition method, omni-directional accurate detection of vehicle collision and side rollover events is realized, the precision is high, no blind spots exists, and the phenomena of false alarm and omitted alarm are avoided.

Description

technical field [0001] The invention relates to the field of vehicle detection, in particular to a vehicle rollover and collision detection method, device and application thereof. Background technique [0002] In recent years, with the continuous and rapid development of my country's economy and society, cars have greatly facilitated people's daily travel and production and business activities. The rigid demand for car purchases is strong, the number of cars continues to grow rapidly, and the number of motor vehicles and drivers has increased rapidly. . While automobiles bring convenience to people's production and life, they also bring potential safety hazards that cannot be ignored. Frequent traffic accidents seriously threaten the safety of people's lives and property. Therefore, discovering and handling traffic accidents in time is an important guarantee for protecting the safety of people's lives and properties. [0003] The traditional design schemes in the past have ...

AI Technical Summary

Problems solved by technology

[0003] The traditional design schemes in the past have the following defects: First, many foreign automakers have invested a lot of manpower and material resources in recent years to develop automatic emergency call systems for vehicle accidents, but they are generally based on automatic triggering of airbags; second, triggering is achieved through manual buttons ; The third is to use a mechanical acceleration sensor unit or a mechanical transmission mechanism to realize collision and rollover detection; the fourth is to use an acceleration sensor detection method, such as Patent Application No. 200610069493.X "a method for vehicle collision / rollover detection and alarm and devices”, the calculation method of collision and rollover is relatively rough and the accuracy is not enough

[0004] Traditional collision and rollover detection methods are relatively mechanical, complicated to install, high in manual participation, low in accuracy, and high in false alarm or missed alarm probability. Triggering the distress signal will be subject to the fact that foreign car manufacturers cannot install it on different models, and the airbag will fail in some special-angle collisions and rollovers; the second is to trigger the alarm or self-rescue with manual buttons, which is obviously not timely and smart enough. , the owner cannot trigger the operation in a serious accident; the third is the mechanical acceleration sensor or the mechanical transmission mechanism, which has a single and independent function, and requires multiple sensor units to realize signal detection in each direction, which is complicated to implement and install, and the cost is high; the fourth is to use the acceleration sensor The simple calculation method of the acceleration components in each direction, the error is too large, the accuracy is low, and it is easy to cause false positives and false positives

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