CN-121989956-A - Method and equipment for identifying road chassis collision event of vehicle

CN121989956ACN 121989956 ACN121989956 ACN 121989956ACN-121989956-A

Abstract

The embodiment of the invention relates to the technical field of road identification, and discloses a method and equipment for identifying a road chassis collision event of a vehicle, wherein the method comprises the steps of acquiring chassis impact acceleration and suspension compression change rate; determining whether a vehicle generates a chassis impact event according to the chassis impact acceleration, determining that an adjacent preset time window generating the chassis impact event is a target time window when the vehicle generates the chassis impact event, determining whether the vehicle generates a suspension reverse stretching event in the target time window according to the suspension compression amount change rate, and determining that the vehicle generates a road chassis collision event when the vehicle generates the suspension reverse stretching event in the target time window. By applying the technical scheme of the invention, the chassis collision event of the road can be accurately identified, and the false alarm rate is reduced.

Inventors

CAI HUALIN
LI QI
LV HAIYAN
WANG QI

Assignees

阿维塔科技(重庆)股份有限公司

Dates

Publication Date: 20260508
Application Date: 20260330

Claims (11)

1. A method for identifying a road chassis event of a vehicle, the method comprising: acquiring the chassis impact acceleration and the suspension compression change rate; determining whether a chassis impact event occurs to the vehicle according to the chassis impact acceleration; When the chassis impact event occurs to the vehicle, determining whether the vehicle has a suspension reverse stretching event in a preset time window adjacent to the chassis impact event according to the suspension compression amount change rate; And when the suspension reverse stretching event of the vehicle occurs in the adjacent preset time window of the chassis impact event, determining that the vehicle has a road chassis collision event.
2. The method of claim 1, wherein said determining whether a chassis impact event has occurred with the vehicle based on the chassis impact acceleration comprises: acquiring an impact acceleration threshold value and an impact duration threshold value; Acquiring the duration time that the impact acceleration of the chassis is larger than the impact acceleration threshold value; And when the duration is smaller than the impact duration threshold value, determining that the vehicle generates a chassis impact event.
3. The method of claim 2, wherein acceleration sensors are provided at a plurality of locations on the chassis, the method further comprising: collecting a plurality of impact accelerations through a plurality of acceleration sensors; When the duration time of the impact acceleration acquired by any acceleration sensor is larger than the impact acceleration threshold value and smaller than the impact duration threshold value, determining that a chassis impact event occurs to the vehicle, and determining that the position of the corresponding acceleration sensor is the position where the road chassis collision event occurs.
4. The method of claim 3, wherein the acceleration sensors are sequentially spaced apart in a stepwise manner along the length of the vehicle, or are spaced apart along the front chassis edge, the rear chassis edge, and the center chassis.
5. The method of claim 1, wherein said determining from said rate of change of suspension compression whether said vehicle has a suspension reverse stretch event within a predetermined time window adjacent to said chassis impact event comprises: Acquiring a compression rate threshold; And when any one of the suspension compression amount change rates is smaller than the compression rate threshold, determining that the vehicle generates a suspension reverse stretching event in a preset time window adjacent to the chassis impact event, wherein the suspension compression amount change rate corresponds to the suspension compression amount change rate of each wheel.
6. The method of claim 1, wherein the acquiring the chassis jerk and suspension compression rate of change comprises: Acquiring an impact acceleration signal and a suspension compression signal; Band-pass filtering the impact acceleration signals to obtain impact acceleration signals higher than a preset peak value in the filtered impact acceleration signals as chassis impact acceleration; And differentiating the suspension compression quantity signal to obtain the change rate of the suspension compression quantity.
7. The method of claim 1, wherein upon determining that the vehicle has a suspension reverse stretch event within a preset time window adjacent to the chassis impact event, determining that the vehicle has a road-bumped chassis event further comprises: Acquiring a chassis impact acceleration peak value of the chassis impact event and/or a suspension stretching amplitude of the suspension reverse stretching event; determining the collision severity of the road chassis collision event according to the chassis impact acceleration peak value and/or the suspension stretching amplitude; and generating a coping strategy of the road chassis collision event according to the collision severity.
8. The method according to claim 1, wherein the method further comprises: Acquiring the speed of the vehicle; And determining corresponding impact acceleration thresholds and compression rate thresholds according to the vehicle speeds, wherein different vehicle speeds correspond to different acceleration thresholds and compression rate thresholds.
9. The method of claim 1, wherein said determining whether a chassis impact event has occurred with the vehicle based on the chassis impact acceleration comprises: Acquiring chassis sound characteristics; And when the chassis sound characteristics meet the acoustic conditions of the road chassis collision event, determining whether the vehicle has the chassis impact event or not according to the chassis impact acceleration.
10. The method of claim 1, wherein said determining whether a chassis impact event has occurred with the vehicle based on the chassis impact acceleration comprises: acquiring a chassis pressure change rate and the impact pressure threshold; And when the chassis pressure change rate is larger than the impact pressure threshold value, determining whether a chassis impact event occurs to the vehicle according to the chassis impact acceleration.
11. A roadway chassis-gouging event recognition apparatus for a vehicle, the apparatus comprising: The data acquisition module is used for acquiring the chassis impact acceleration and the suspension compression change rate; The event determining module is used for determining whether a chassis impact event occurs to the vehicle according to the chassis impact acceleration; The event determining module is further used for determining whether the vehicle generates a suspension reverse stretching event in a preset time window adjacent to the chassis impact event according to the suspension compression amount change rate when the vehicle generates the chassis impact event; And the event identification module is used for determining that the vehicle generates a road chassis collision event when determining that the vehicle generates a suspension reverse stretching event in a preset time window adjacent to the chassis impact event.

Description

Method and equipment for identifying road chassis collision event of vehicle Technical Field The embodiment of the invention relates to the technical field of road identification, in particular to a method and equipment for identifying a road chassis event of a vehicle. Background In the running process of the vehicle, particularly in the case of steep slopes or higher speed reduction zones, the chassis of the vehicle (comprising an oil tank, an exhaust pipe, an engine lower guard plate and the like) is easy to collide with or scratch the road surface bulge. The chassis collision event is light, so that chassis parts are damaged, abnormal sound is generated, and serious safety accidents such as oil pan breakage and line damage are caused. The prior art lacks an effective identification method for the collision of the chassis, mainly relies on subjective judgment of a driver, or the chassis is checked afterwards to find out the problem. The 360-degree panoramic image system provided by part of vehicles can assist in observation, but cannot automatically recognize and early warn. Few schemes attempt to use a vehicle body acceleration sensor to perform impact detection, but the false alarm rate is high, and the road chassis collision event is difficult to accurately identify. Disclosure of Invention In view of the above problems, the embodiments of the present invention provide a method and an apparatus for identifying a road chassis event of a vehicle, which are used to solve the problem in the prior art that it is difficult to accurately identify the road chassis event. According to an aspect of the embodiment of the invention, there is provided a method for identifying a road chassis event of a vehicle, the method comprising: acquiring the chassis impact acceleration and the suspension compression change rate; determining whether a chassis impact event occurs to the vehicle according to the chassis impact acceleration; when a chassis impact event occurs to the vehicle, determining whether the vehicle has a suspension reverse stretching event in a preset time window adjacent to the chassis impact event according to the suspension compression amount change rate; And when the suspension reverse stretching event of the vehicle occurs in the adjacent preset time window of the chassis impact event, determining that the vehicle has a road chassis collision event. According to another aspect of the embodiment of the present invention, there is provided a road chassis collision event recognition apparatus for a vehicle, including: The data acquisition module is used for acquiring the chassis impact acceleration and the suspension compression change rate; The event determining module is used for determining whether a chassis impact event occurs to the vehicle according to the chassis impact acceleration; the event determining module is further used for determining whether a suspension reverse stretching event occurs in a preset time window adjacent to the chassis impact event according to the suspension compression amount change rate when the chassis impact event occurs in the vehicle; The event identification module is used for determining that the vehicle generates a road chassis collision event when determining that the vehicle generates a suspension reverse stretching event in a preset time window adjacent to the chassis impact event. According to another aspect of the embodiment of the invention, a road chassis event recognition device for a vehicle is provided, which comprises a processor, a memory, a communication interface and a communication bus, wherein the processor, the memory and the communication interface complete communication with each other through the communication bus; The memory is used for storing at least one executable instruction which causes the processor to execute the operations of the road chassis event identification method of the vehicle. According to yet another aspect of an embodiment of the present invention, there is provided a computer-readable storage medium having stored therein at least one executable instruction for causing a road-chassis-with-event recognition apparatus/device of a vehicle to perform the operations of the above road-chassis-with-event recognition method of a vehicle. The embodiment of the invention comprises the steps of firstly obtaining the chassis impact acceleration and the suspension compression change rate, judging the occurrence of a chassis impact event through the chassis impact acceleration, capturing the direct impact characteristics possibly generated by a knocked chassis, judging the occurrence of a suspension reverse stretching event through the suspension compression change rate in an adjacent preset time window corresponding to the chassis impact event, verifying whether the impact is accompanied with the indirect effect of abnormal suspension stretching, and judging the road knocked chassis event based on the time sequence correlation of the t