CN-121982906-A - Method for reducing probability of rear-end collision after high-speed sudden braking

CN121982906ACN 121982906 ACN121982906 ACN 121982906ACN-121982906-A

Abstract

The invention provides a method for reducing the probability of rear-end collision after high-speed sudden braking, which belongs to the technical field of active safety of automobiles and comprises the steps of collecting running state data of a vehicle in real time through a multi-source sensor, wherein the running state data at least comprises longitudinal deceleration, a brake pedal stroke and real-time road condition information, carrying out fusion judgment through a sudden braking judgment module based on the running state data, generating a sudden braking signal if a preset sudden braking condition is met at the same time, responding to the sudden braking signal, automatically triggering a double-flash warning device to be started and simultaneously sending state feedback information to a driver, and controlling the double-flash warning device to be closed according to a preset closing condition after the vehicle resumes normal running. The invention can effectively improve the driving safety of the expressway and reduce the risk of rear-end collision accidents.

Inventors

LIU BIN
YU BINKE
ZHU FENG
ZHU XIANG
WANG HONG

Assignees

东风汽车集团股份有限公司

Dates

Publication Date: 20260505
Application Date: 20260108

Claims (10)

1. A method for reducing the probability of rear-end collision after high-speed sudden braking, comprising the steps of: collecting running state data of a vehicle in real time through a multisource sensor, wherein the running state data at least comprises longitudinal deceleration, brake pedal travel and real-time road condition information; based on the running state data, fusion judgment is carried out through a sudden braking judgment module, and if the sudden braking condition is met, a sudden braking signal is generated; responding to the sudden braking signal, automatically triggering the double-flash warning device to be started, and simultaneously sending state feedback information to a driver; and after the vehicle resumes normal running, the double-flash warning device is controlled to be closed according to a preset closing condition.
2. The method of claim 1, wherein the multi-source sensor comprises an IMU sensor, a brake pedal travel sensor, and a navigation host road condition receiving module; the IMU sensor is used for acquiring the longitudinal deceleration of the vehicle; The brake pedal travel sensor is used for collecting brake pedal travel signals, quantifying the brake pedal travel signals in a percentage mode and transmitting the brake pedal travel signals to the sudden brake judging module through the CAN bus; The navigation host road condition receiving module is used for receiving dangerous event data of sudden accidents, front congestion early warning or V2X cloud pushing provided by the high-precision map.
3. The method of claim 1, wherein the sudden braking condition is a combination of: (a) The vehicle longitudinal deceleration reaches or exceeds a first preset threshold; (b) The travel of the brake pedal reaches or exceeds a second preset threshold; (c) The real-time traffic information indicates that there is a scene where emergency braking is required. When the conditions (a), (b) and (c) are simultaneously satisfied, it is determined that a sudden braking scenario is high speed.
4. The method according to claim 1, wherein the responding to the sudden braking signal automatically triggers the double flashing warning device to be turned on and simultaneously sends state feedback information to the driver, specifically comprising: After receiving the sudden braking signal, the double-flash warning device is started within a preset first time threshold value and strobes at a preset warning frequency; meanwhile, the state feedback module converts the double-flashing start state information into a perceptible prompt signal and feeds the perceptible prompt signal back to a driver; the perceptible prompt signal is a voice broadcast signal and is used for broadcasting the starting state and the operation prompt information of the double-flash warning device to a driver.
5. The method of claim 1, wherein the shut-down condition comprises at least one of: the driver actively operates the double flashing switch to close based on the state feedback information; Automatically closing, namely automatically triggering the double-flash warning device to be closed when the system detects that the vehicle is restored to a normal running state and meets the preset safety condition; Wherein the preset safety conditions include at least one of the following conditions: The vehicle is continuously above a safe running speed threshold value for a first preset duration, and real-time road condition information indicates no emergency pre-warning; the vehicle receives a confirmation response of the rear vehicle to the sudden braking early warning through the communication of the Internet of vehicles; The vehicle positioning information confirms that the vehicle has driven away from the dangerous area where sudden braking occurs.
6. The method of claim 5, wherein the auto-close mode further comprises secondary alert logic, specifically comprising: When the opening duration of the double-flash warning device exceeds a preset second time threshold, and the vehicle state monitoring module detects that the vehicle meets the automatic closing condition but the double-flash warning device is not closed, a secondary warning signal is sent to a driver through the state feedback module.
7. The method of claim 1, further comprising V2X collaborative early warning extensions, comprising: After the sudden braking judgment module generates a sudden braking signal, broadcasting an early warning message to vehicles in a rear preset range through the Internet of vehicles communication module, so that after the rear vehicles receive the early warning message, displaying warning information on a vehicle-mounted man-machine interaction interface of the rear vehicles and triggering a prompt signal; wherein the early warning message comprises at least one of the following: Real-time position coordinate information of a front vehicle; real-time motion state data of the front vehicle, including longitudinal deceleration value, vehicle speed and course angle; braking advice information generated based on a movement state and a relative distance of the preceding vehicle; the warning information comprises at least one of the following: graphical identification of the type of the sudden braking event of the front vehicle; Real-time relative distance and relative speed between the front vehicle and the own vehicle; the system recommends danger avoiding operation guidance; the cue signal includes at least one of the following: A hierarchical voice alarm output by the vehicle-mounted audio system; Visual warning signs are output through the vehicle-mounted display equipment; a haptic alert signal generated by a haptic feedback device.
8. The method of claim 1, wherein the sudden braking determination module is integrated in a vehicle electronic control unit, employs a determination algorithm written in language C, meets an auto sar function safety standard, and implements software upgrade in an OTA manner.
9. The method according to claim 1, wherein the method further supports a hardware redundancy scheme, specifically comprising: The first redundancy scheme is that when an IMU sensor fails or data is abnormal, the IMU sensor is switched to a standby data source, longitudinal deceleration data and brake pressure data acquired by an electronic stability control system are adopted, and the sudden braking state is judged through the combination of a preset deceleration threshold value and a preset brake pressure threshold value; And in the second redundancy scheme, when the IMU sensor and the ESC system are unavailable, a pedal opening signal acquired by a brake pedal stroke sensor is adopted, and the sudden braking state is judged through a preset pedal opening threshold value and an opening change rate threshold value.
10. The method of claim 1, further comprising lane recognition assisted shut down logic that, when the dual flash warning device is turned on, effects assisted shut down by: Acquiring a front lane line image through a vehicle-mounted camera, and judging whether the vehicle changes to an emergency lane by adopting a lane line recognition algorithm in combination with steering wheel angle sensor data; when the vehicle is identified to enter an emergency lane, the current position of the vehicle is obtained through a high-precision map positioning module, and whether the vehicle is in a safe area or not is judged by combining real-time road condition information; If the vehicle enters the emergency lane and is in a safe area, the double-flash warning device is automatically turned off; The lane line recognition algorithm is realized based on a deep learning model, and the determination standard of the safety area comprises that the vehicle is completely parked in an emergency lane, keeps a safety distance from the main lane, has no rapid approaching vehicle at the rear and has no emergency early warning at the front.

Description

Method for reducing probability of rear-end collision after high-speed sudden braking Technical Field The invention relates to the technical field of active safety of automobiles, in particular to a method for reducing the probability of rear-end collision after high-speed emergency braking. Background With the rapid development of expressway networks and the continuous increase of automobile conservation, expressway traffic accidents frequently occur, wherein rear-end accidents occupy a larger proportion. In a high-speed driving state, when the front vehicle is suddenly braked, the front danger cannot be found in time due to the reasons of shielding of sight, insufficient reaction time, distraction and the like of a rear driver, so that a rear-end collision accident occurs. Although the traditional double-flash warning lamp can remind the rear vehicle to a certain extent, the warning effect is greatly influenced by factors such as weather, light rays, road curvature and the like, the propagation distance is limited, and the safety requirement under a high-speed driving scene is difficult to meet. Disclosure of Invention In view of the technical defects and technical drawbacks existing in the prior art, embodiments of the present invention provide a method for reducing the probability of being knocked-down after high-speed sudden braking, which overcomes or at least partially solves the above problems, and the specific scheme is as follows; a method for reducing the probability of rear-end collision after high-speed sudden braking comprises the following steps: collecting running state data of a vehicle in real time through a multisource sensor, wherein the running state data at least comprises longitudinal deceleration, brake pedal travel and real-time road condition information; based on the running state data, fusion judgment is carried out through a sudden braking judgment module, and if the sudden braking condition is met, a sudden braking signal is generated; responding to the sudden braking signal, automatically triggering the double-flash warning device to be started, and simultaneously sending state feedback information to a driver; and after the vehicle resumes normal running, the double-flash warning device is controlled to be closed according to a preset closing condition. In some embodiments, the multi-source sensor comprises an IMU sensor, a brake pedal travel sensor, and a navigation host road condition receiving module; the IMU sensor is used for acquiring the longitudinal deceleration of the vehicle; The brake pedal travel sensor is used for collecting brake pedal travel signals, quantifying the brake pedal travel signals in a percentage mode and transmitting the brake pedal travel signals to the sudden brake judging module through the CAN bus; The navigation host road condition receiving module is used for receiving dangerous event data of sudden accidents, front congestion early warning or V2X cloud pushing provided by the high-precision map. In some embodiments, the sudden braking condition is a combination of the following conditions: (a) The vehicle longitudinal deceleration reaches or exceeds a first preset threshold; (b) The travel of the brake pedal reaches or exceeds a second preset threshold; (c) The real-time traffic information indicates that there is a scene where emergency braking is required. When the conditions (a), (b) and (c) are simultaneously satisfied, it is determined that a sudden braking scenario is high speed. In some embodiments, the responding to the sudden braking signal automatically triggers the dual-flash warning device to be turned on and simultaneously sends state feedback information to the driver, which specifically includes: After receiving the sudden braking signal, the double-flash warning device is started within a preset first time threshold value and strobes at a preset warning frequency; meanwhile, the state feedback module converts the double-flashing start state information into a perceptible prompt signal and feeds the perceptible prompt signal back to a driver; the perceptible prompt signal is a voice broadcast signal and is used for broadcasting the starting state and the operation prompt information of the double-flash warning device to a driver. In some embodiments, the shut-down condition includes at least one of: the driver actively operates the double flashing switch to close based on the state feedback information; Automatically closing, namely automatically triggering the double-flash warning device to be closed when the system detects that the vehicle is restored to a normal running state and meets the preset safety condition; Wherein the preset safety conditions include at least one of the following conditions: The vehicle is continuously above a safe running speed threshold value for a first preset duration, and real-time road condition information indicates no emergency pre-warning; the vehicle receives a confirmation response of the