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Lane shift early warning control method based on a 360-degree circumferential view image system

A technology of lane deviation and control method, applied in the field of advanced driver assistance systems, can solve problems such as increasing cost burden, and achieve the effect of saving hardware cost and low cost

Inactive Publication Date: 2019-01-25
JIANGLING MOTORS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the monocular camera module will undoubtedly increase the cost burden for car manufacturers who are extremely cost-sensitive. At this time, another low-cost solution is needed to develop this function.

Method used

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  • Lane shift early warning control method based on a 360-degree circumferential view image system
  • Lane shift early warning control method based on a 360-degree circumferential view image system
  • Lane shift early warning control method based on a 360-degree circumferential view image system

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Experimental program
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Embodiment 1

[0022] see Figure 1 ~ Figure 3 , the present invention is based on the lane deviation early warning control method of the 360° surround view image system, based on the 360° surround view image system to develop the LDW function, it is necessary to use the lane line data collected by the front camera to extract and process, and combine the operation on the vehicle The status signal analyzes the current driving situation of the own vehicle to determine whether the own vehicle is in a dangerous working condition of leaving the lane. figure 1 Schematic diagram of the alarm critical line and its setting area for lane departure warning.

[0023] Alarm strategy

[0024] The LDW function needs to judge whether the vehicle deviates from the lane according to the vehicle's crossing time (TTLC) and the vehicle's distance from the lane line (DLC), where the vehicle's crossing time refers to the time required for the front wheel center to travel to the lane line on the same side; The di...

Embodiment 2

[0058] see Figure 1 ~ Figure 3 , the present invention is based on the lane deviation early warning control method of the 360° surround-view image system, judges whether the own vehicle deviates from the lane according to the time of the own vehicle crossing the boundary (TTLC) and the distance between the own vehicle and the lane line (DLC), and combines the width of the lane and other suppression Conditions comprehensively judge whether the vehicle crosses the boundary or deviates from the lane, and issues a lane departure warning after the vehicle crosses the boundary or deviates from the lane to remind the driver to control the vehicle to drive normally; among them, the self-vehicle crossing time refers to the time required for the front wheel center to travel to the lane line on the same side time; cross-border time TTLC = the distance between the center of the front wheel and the lane boundary D / lateral deviation speed V D ; The distance between the vehicle and the la...

Embodiment 3

[0060] see Figure 1 ~ Figure 3 The difference between the lane departure warning control method based on the 360° surround-view image system of this embodiment and Embodiment 2 is that: further, a fixed warning line DLC is defined, and when the self-vehicle approaches the lane line, there is no function suppression condition When the TTLC alarm condition is triggered and the TTLC alarm condition is not met, the system will trigger the alarm according to the fixed alarm line DLC, and define the narrow lane and its DLC value and the wide lane and its DLC value according to the actual lane width and width:

[0061] Narrow lane: 2.5m

[0062] Wide lane: 2.7m≤W≤4.8m, the DLC threshold is defined as 10cm; that is, whe...

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Abstract

That present invention relates to an advanced driver assistance system, in particular to a lane shift early warning control method based on a 360-DEG circumferential image system; according to the self-crossing time TTLC and the distance DLC between self and lane, whether the vehicle deviates from the lane or not is judged, and combined with the lane width, whether the vehicle crosses the lane ordeviates from the lane is judged comprehensively, and a lane deviation warning is issued after the vehicle crosses the lane or deviates from the lane to remind the driver to control the vehicle to runnormally. The self-crossing time refers to the time required for the wheel center of the front wheel to travel to the lane on the same side; overrun time TTLC=distance D between wheel center of frontwheel and lane boundary / lateral deviation velocity VD. The distance between the vehicle and lane refers to the physical distance between the wheel center of the front wheel and the lane on the same side, which is calculated by the lane information collected by the front camera. As that LDW function is developed based on the 360-DEG circumferential view image system, the hardware cost brought by the LDW function can be directly saved and the cost is low.

Description

technical field [0001] The present invention relates to an advanced driver assistance system (ADAS), in particular to a lane departure warning system (Lane Departure Warning, abbreviated as LDW). The driver sends out an audible and visual alarm to remind the driver to control the vehicle to run stably within the lane line to avoid side collisions). Background technique [0002] As consumers pay more and more attention to car safety, advanced driver assistance systems (ADAS) have naturally become the key areas of technology development for major automakers. As one of the functions of ADAS, the LDW function can judge unconscious lane departure and send an alarm to the driver to reduce the occurrence of side collisions and other related accidents. [0003] At present, most automobile manufacturers use an independent front-view monocular camera as the image sensor and processor to identify and process the collected lane line video information, and then combine the current drivi...

Claims

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Application Information

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IPC IPC(8): B60W50/14B60R1/00
CPCB60R1/00B60R2300/10B60R2300/8086B60W50/14B60W2050/143
Inventor 刘卫东李甜甜陈胜波王爱春邬杰
Owner JIANGLING MOTORS
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