CN-121973768-A - AEB control method based on cooperation of low-orbit satellite and Internet of vehicles

CN121973768ACN 121973768 ACN121973768 ACN 121973768ACN-121973768-A

Abstract

The invention discloses an AEB control method based on cooperation of a low-orbit satellite and a vehicle networking, which relates to the technical field of intelligent traffic and vehicle safety control, and comprises the following steps: the intelligent vehicle collects state data and surrounding vehicle information of the vehicle through the low-orbit satellite communication module and uploads the state data and surrounding vehicle information to the low-orbit satellite, the low-orbit satellite carries out grouping summarization on vehicle data in a similar geographical area, vehicle dynamic maps in the area are constructed, vehicle clusters needing information intercommunication are screened, the low-orbit satellite generates scheduling information and transmits the scheduling information to the vehicle, when an edge calculation unit judges that the risk reaches a preset safety threshold, a braking trigger instruction is sent to an AEB control unit, the AEB control unit executes emergency braking and feeds back the state to the satellite to broadcast the surrounding vehicle.

Inventors

HU XINGYU
YIN CHENGLIANG
WU YUEPENG
GAO LIANGQUAN
QIN WENGANG

Assignees

上海智能网联汽车技术中心有限公司

Dates

Publication Date: 20260505
Application Date: 20260210

Claims (8)

1. The AEB control method based on the cooperation of the low orbit satellite and the Internet of vehicles is characterized by comprising the following steps of: Step S1, acquiring and uploading data, namely acquiring state data of a vehicle by an intelligent vehicle through a low-orbit satellite communication module, wherein the state data comprise real-time speed, positioning information, accelerator opening and braking operation state, detecting speed and position information of surrounding vehicles through a vehicle-mounted sensor, and uploading the state data and the surrounding vehicle information to a low-orbit satellite through a low-orbit satellite link; step S2, data aggregation and vehicle grouping, namely, after a low-orbit satellite receives data uploaded by a plurality of vehicles, grouping and summarizing the vehicle data in a similar geographical area, constructing a vehicle dynamic map in the area, judging that vehicles in interaction scenes of potential vehicle meeting, vehicle following and cross running exist in the grouping, and screening out vehicle clusters needing to be subjected to information intercommunication; Step S3, scheduling decision and instruction issuing, wherein a low orbit satellite generates scheduling information according to dynamic data of a vehicle cluster, the scheduling information is issued to a vehicle through a satellite link, an edge computing unit of the vehicle judges the relative state of surrounding vehicles and the vehicle after receiving the scheduling information, and when judging that the risk reaches a preset safety threshold, a brake triggering instruction is sent to a vehicle-mounted AEB control unit; And S4, after receiving the braking trigger instruction, the AEB control unit controls the electronic brake booster to execute emergency braking operation, and reversely feeds back the braking execution state and the current dynamic data of the vehicle to a low-orbit satellite through a low-orbit satellite link, and the low-orbit satellite broadcasts the feedback data to surrounding vehicles to provide data support for risk early warning and collaborative protection of the surrounding vehicles.
2. The AEB control method based on the cooperation of the low-orbit satellite and the Internet of vehicles according to claim 1, wherein the low-orbit satellite communication module comprises a high-gain satellite signal receiving and transmitting antenna, a vehicle-standard broadband modulation and demodulation circuit, a vehicle data direct acquisition interface unit and a link control unit, wherein the vehicle data direct acquisition interface unit is compatible with a vehicle CAN bus and an Ethernet interface of a vehicle-mounted sensor, and is used for directly extracting original data of a vehicle.
3. The AEB control method based on the cooperation of the low-orbit satellite and the internet of vehicles according to claim 1, wherein in the step S3, the edge computing unit runs a vehicle meeting priority evaluation algorithm, and generates one scheduling instruction of a passing instruction, a waiting instruction and an avoidance instruction by combining direct transmission data of the vehicle and the opposite vehicle.
4. The AEB control method based on the cooperation of a low-orbit satellite and the internet of vehicles according to claim 1, wherein the edge computing unit identifies the VIN code identifier of the special vehicle, and when the ambulance and the fire engine are identified, the position and the traffic demand of the special vehicle are reported through a satellite direct transmission link, and the special vehicle is assigned with priority traffic.
5. The AEB control method based on the cooperation of the low-orbit satellite and the internet of vehicles according to claim 1, wherein a dual-parameter risk assessment model based on collision time TTC and a safety distance THW is built in the AEB control unit, and whether the risk reaches a preset safety threshold is determined according to the dual-parameter risk assessment model.
6. The low-orbit satellite and internet of vehicles collaborative AEB control method according to claim 1, wherein when the low-orbit satellite communication module detects that own vehicle data is abnormal in direct transmission, a local caching and retransmission mechanism is triggered to avoid key data loss.
7. The AEB control method based on the cooperation of the low-orbit satellite and the internet of vehicles according to claim 1, wherein the AEB control unit dynamically adjusts a braking curve according to the road adhesion coefficient acquired by the road side sensing unit, and reduces the brake pressure increase rate on the ice and snow road surface.
8. The AEB control method based on the cooperation of the low-orbit satellite and the internet of vehicles according to claim 1, wherein when the ground network is interrupted, the system is automatically switched to the low-orbit satellite as a main link, so as to ensure stable transmission of the meeting scheduling instruction, the AEB risk data and the special vehicle priority information.

Description

AEB control method based on cooperation of low-orbit satellite and Internet of vehicles Technical Field The invention relates to the technical field of intelligent traffic and vehicle safety control, in particular to an AEB control method based on cooperation of a low-orbit satellite and the Internet of vehicles. Background An automatic emergency braking system (Automatic Emergency Braking, AEB for short) is an important active safety device of a modern intelligent automobile, and can automatically trigger braking when collision risk is detected, so that the probability of traffic accidents is effectively reduced. Currently, technical optimization of an AEB system is concentrated on improvement of performance upgrading and data fusion algorithm of a vehicle-mounted sensor, for example, short-range target recognition accuracy is improved by increasing the number of laser radar lines, or image recognition effect of a camera is optimized by adopting a deep learning algorithm, and partial research attempts are introduced into V2X technology to expand sensing dimension, but the technology is limited by coverage range and stability of a communication link, and the function of the technology is limited to a scene with perfect ground communication infrastructure such as urban roads. The existing AEB system mainly depends on vehicle-mounted single-source or limited multi-source sensing equipment, such as cameras, millimeter wave radars, laser radars and the like, however, the scheme based on vehicle-mounted local sensing has obvious technical bottlenecks, on one hand, the vehicle-mounted sensing equipment is limited by physical shielding, extreme weather and sensing distance, and is easy to generate sensing blind areas or data distortion, on the other hand, when other vehicles perform operations such as acceleration and braking, the change of the other vehicles cannot be immediately known, and the intelligent vehicle can lag the response only by acquiring information through a sensor. Therefore, the existing AEB system has the technical defects of limited sensing range, insufficient data transmission reliability and lagged risk identification, and a novel AEB control method capable of breaking through the bottleneck is needed. Disclosure of Invention Aiming at the defects of limited sensing range, insufficient data transmission reliability and delayed risk identification of the existing AEB system, the invention provides an AEB control method based on the cooperation of a low-orbit satellite and a vehicle network, which fuses multidimensional sensing data through a cooperative communication architecture of the low-orbit satellite and V2X, and transmits change information to surrounding vehicles when the running condition of the vehicle changes, thereby improving the risk identification precision and response timeliness of the AEB system. The technical scheme adopted by the invention is as follows: An AEB control method based on cooperation of a low orbit satellite and the Internet of vehicles comprises the following steps: and S1, acquiring and uploading data, namely acquiring vehicle state data of an intelligent vehicle through a low-orbit satellite communication module, wherein the vehicle state data comprise real-time speed, positioning information, accelerator opening and braking operation states, detecting speed and position information of surrounding vehicles through a vehicle-mounted sensor, and uploading the vehicle state data and the surrounding vehicle information to a low-orbit satellite through a low-orbit satellite link. And S2, data aggregation and vehicle grouping, namely, after the low-orbit satellite receives data uploaded by a plurality of vehicles, grouping and summarizing the vehicle data in a similar geographical area, constructing a vehicle dynamic map in the area, judging that vehicles in interaction scenes of potential vehicle meeting, vehicle following and cross running exist in the grouping, and screening out vehicle clusters needing to be subjected to information intercommunication. And step S3, scheduling decision and instruction issuing, wherein the low orbit satellite generates scheduling information according to dynamic data of the vehicle cluster, issues the scheduling information to the vehicle through a satellite link, judges the relative states of surrounding vehicles and the vehicle after an edge computing unit of the vehicle receives the scheduling information, and sends a braking trigger instruction to a vehicle-mounted AEB control unit when judging that the risk reaches a preset safety threshold. And S4, after receiving the braking trigger instruction, the AEB control unit controls the electronic brake booster to execute emergency braking operation, and reversely feeds back the braking execution state and the current dynamic data of the vehicle to a low-orbit satellite through a low-orbit satellite link, and the low-orbit satellite broadcasts the feedback data to surrounding ve