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Expressway automobile rear-end collision prevention system and working method thereof

A technology for highways and working methods, which is applied in traffic control systems, anti-collision systems, and traffic control systems of road vehicles, and can solve problems such as failure of rear-end collision warnings for obstacles on curves, poor real-time rear-end collision warnings, and inability to distinguish lanes, etc.

Inactive Publication Date: 2020-10-27
YANCHENG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the deficiencies in the prior art, the object of the present invention is to provide a highway automobile rear-end collision prevention system and its working method. Solved the problem of failure of rear-end collision warning when encountering curve obstacles in the anti-rear-collision system based on laser and radar technology, solved the problem of poor real-time rear-end collision warning in the anti-rear-collision system based on image recognition technology, and solved the problem of real-time rear-end collision warning based on global positioning technology. The problem that the lane cannot be distinguished in the anti-rear collision system

Method used

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  • Expressway automobile rear-end collision prevention system and working method thereof
  • Expressway automobile rear-end collision prevention system and working method thereof
  • Expressway automobile rear-end collision prevention system and working method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065]Take the maximum allowable speed of the expressway as 120km / h, take Figure 4 Among them, M5 takes 30ms, M6 takes 30ms, M7 takes 30ms, and M8 takes 40ms. Therefore, Figure 4 Medium CM j It takes 30+30+30+40=130ms to complete the anti-rear-end collision warning process from M5 to M8. It can be calculated that the RFID tag placement interval PL needs to meet:

[0066]

[0067] Take PL=10m. Take highway lane width RL=3.75m, then set the reading range of RFID tag reader as 3.75 / 2≈1.8m. It is required that the reading time of the RFID tag reader should be less than:

[0068]

[0069] Take the friction coefficient μ=0.9 when the rubber tire and the asphalt pavement (dry) slide friction, the driver’s reaction time t s =2s, when setting WL=500m, R m P i CM at j the v j =110km / h, choose R randomly m P i-15 CM at j-1 the v j-1 =120km / h, due to CM j braking distance:

[0070]

[0071] , CM j-1 braking distance:

[0072]

[0073] CM j with CM j-1 distan...

Embodiment 2

[0081] Take the maximum allowable speed of the expressway as 120km / h, take Figure 4 Among them, M5 takes 30ms, M6 takes 30ms, M7 takes 30ms, and M8 takes 40ms. Therefore, Figure 4 Medium CM j It takes 30+30+30+40=130ms to complete the anti-rear-end collision warning process from M5 to M8. It can be calculated that the RFID tag placement interval PL needs to meet:

[0082]

[0083] Take PL=10m. Take highway lane width RL=3.75m, then set the reading range of RFID tag reader as 3.75 / 2≈1.8m. It is required that the reading time of the RFID tag reader should be less than:

[0084]

[0085] Take the friction coefficient μ=0.9 when the rubber tire and the asphalt pavement (dry) slide friction, the driver’s reaction time t s =2s, when setting WL=500m, R m P i CM at j Encountered emergency braking, the vehicle speed v j =30km / h, choose R randomly m P i-10 CM at j-1 the v j-1 =120km / h, due to CM j braking distance:

[0086]

[0087] CM j-1 braking distance:

[...

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Abstract

The invention discloses an expressway automobile rear-end collision prevention system and a working method thereof. According to the system, a non-contact radio frequency identification mode based onRFID is adopted to realize vehicle positioning and vehicle speed identification, and early warning of vehicle tailgating is realized, so that the problem of failure of rear-end collision early warningwhen encountering curve obstacles in a rear-end collision prevention system based on laser and radar technologies is solved, the problem of poor real-time performance of rear-end collision early warning in the rear-end collision prevention system based on an image recognition technology is solved, and the problem that lanes cannot be distinguished in the rear-end collision prevention system basedon a global positioning technology is solved. The system is simple in structure; the position of a vehicle Cj is obtained by reading RFID non-contact radio frequency identification electronic tags placed at equal intervals PL on the center line of the traffic lane; and the system has 100% acquisition accuracy and shortest position acquisition time, is not influenced by weather factors and curve obstacles, and ensures the real-time performance of early warning of the vehicle rear-end collision prevention system.

Description

technical field [0001] The invention belongs to the technical field of expressway automobile traffic safety, and in particular relates to an expressway automobile rear-end collision prevention system and a working method thereof. Background technique [0002] The main causes of expressway traffic accidents are driver fatigue driving, speeding, illegal lane change, distraction or negligence of observation, tire blowout or bad weather, etc. Among them, rear-end accidents accounted for nearly 50%. By obtaining the position and speed of the vehicle in real time, and then using the anti-rear collision algorithm, it can predict the vehicles prone to rear-end collision accidents and give warnings, which can suppress the occurrence of rear-end collision accidents. [0003] The core of the anti-rear-end collision technical solution is to give the driver sound, light and image rear-end collision warnings in advance on the premise of ensuring that the driver can complete the basic avo...

Claims

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Application Information

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IPC IPC(8): G08G1/16G08G1/052H04W4/02H04W4/029H04W4/44
CPCG08G1/166G08G1/052H04W4/027H04W4/029H04W4/44
Inventor 周磊王春娥白雪飞姚城诚程志豪曾亭亭
Owner YANCHENG INST OF TECH