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Automatic driving vehicle following distance control method and control system

A vehicle-following distance, automatic driving technology, applied in the direction of control device, vehicle components, input parameters of external conditions, etc., can solve problems such as vehicle rear-end collision, and achieve the effect of avoiding accidental collision

Pending Publication Date: 2022-05-13
DONGFENG MOTOR GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, in a heavy rainy day, the performance of the perception sensor decreases, and the change of ground adhesion leads to a decrease in the braking performance of the vehicle. Insufficient braking distance and rear-end collision

Method used

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  • Automatic driving vehicle following distance control method and control system
  • Automatic driving vehicle following distance control method and control system
  • Automatic driving vehicle following distance control method and control system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] The driver activates the automatic driving function through HMI operation. After the system confirms that it has entered the automatic driving mode, it will follow the car according to the basic following distance (time distance) T0.

Embodiment 2

[0055] see figure 2 , to identify the current driving scene, specifically:

[0056]The temperature and humidity outside the vehicle are collected through the temperature and humidity sensor installed outside the vehicle and transmitted to the automatic driving control system through the body controller BCM; at the same time, the weather information (temperature and humidity) is received by connecting to the 4G / 5G network through TBOX; combined with high-precision map / Positioning, comprehensively judge the current vehicle driving environment temperature and humidity information;

[0057] The current rainfall information and current wiper status information (off, intermittent gear, low gear, high gear) are collected through the rain sensor installed on the front windshield and transmitted to the automatic driving control system through the body controller BCM;

[0058] Connect to 4G / 5G network through TBOX to receive weather information (rain, snow, fog); combined with high-p...

Embodiment 3

[0077] see image 3 , a following distance control system for an automatic driving vehicle based on expected functional safety, the control system adopts the above method for controlling the following distance for an automatic driving vehicle, which includes

[0078] A data acquisition module, the data acquisition module collects current vehicle driving environment temperature and humidity information, current rainfall information and current wiper status information, rain, snow, fog status under the vehicle driving environment, following vehicle information ahead, and road condition information;

[0079] A perception fusion module, the perception fusion module organizes the following vehicle information and road condition information data sent by the data acquisition module;

[0080] The planning control module, the planning control module is based on the data from the perception fusion module, the data from ESP and EMS, the temperature and humidity outside the car and the wi...

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Abstract

The invention discloses a following distance control method for an automatic driving vehicle. The following distance control method comprises the following steps: acquiring current vehicle driving environment temperature and humidity information, current rainfall information, current windscreen wiper state information, rain, snow and fog states in the vehicle driving environment, front following vehicle information and road condition information; judging whether the current scene is an expected function safety scene influencing the car following distance or not; if yes, the current car following distance is adjusted. The invention further provides an automatic driving vehicle following distance control system and a storage medium. Different scenes can be combined, the automatic driving vehicle following distance can be dynamically adjusted, and vehicle driving safety is ensured.

Description

technical field [0001] The invention belongs to the field of automatic driving, and in particular relates to a method and a control system for controlling the following distance of an automatic driving vehicle. Background technique [0002] With the continuous development of intelligent driving vehicles, autonomous driving can solve more and more scenarios and conditions. However, in the automatic driving mode, the following distance is generally fixed. However, different self-driving vehicles are equipped with different sensor types, and different sensors have their own limitations. The performance of sensors varies in different environments, road conditions, and traffic scenarios, and under different road conditions, the braking, steering, and acceleration performance of the vehicle will also be affected to varying degrees. Therefore, the actual safe following distance is different. For example, in a heavy rainy day, the performance of the perception sensor decreases, a...

Claims

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Application Information

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IPC IPC(8): B60W30/16B60W60/00
CPCB60W30/16B60W60/001B60W2555/20B60W2754/30
Inventor 高广博张缦绮许梦祥李亘
Owner DONGFENG MOTOR GRP
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