Analysis method of potential traffic conflict type in expressway weaving area based on traffic scene radar
A traffic conflict and expressway technology, applied in collision avoidance systems and other directions, can solve problems such as inability to perform timely calculations, unrealistic judgment results, and outdated means, so as to prioritize the protection of potential high-risk conflicts, achieve preventive effects, and respond quickly. Effect
Active Publication Date: 2017-08-29
ANHUI SUN CREATE ELECTRONICS
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Problems solved by technology
However, due to the fact that most of the current observation methods rely on manual observation or video shooting observation, the methods are backward and timely calculation cannot be performed, and it is even more impossible to implement online warnings to avoid accident risks
Taking a step back, regardless of whether there is a reliable calculation method for conflict angle, even if there is such a calculation method and equipment, only by relying on the mass data acquisition of all targets from roadside cameras to conduct huge and timely flow without purpose. It is obviously more unrealistic to calculate and immediately provide judgment results
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[0076] Obtain the coordinates (2.44, 1.19) of target A; the coordinates (2.40, 1.11) of target vehicle B, calculated as follows:
[0077] 1) According to the above, the relative distance between the two points A and B in the coordinate system is:
[0078] S x =|2.44-2.40|=0.04m, S y =|1.19-1.11|=0.08m.
[0079] 2), by S xmin = S ymin =vt min =11m / s*2.5s=27.5m, it can be seen that:
[0080] S x y <27.5m, you can further calculate the trajectory functions of the two moving targets and judge whether the trajectories intersect.
[0081] 3) Obtain the position coordinates of target A and target B at the next time stamp relative to the current time stamp are (2.41, 1.19), (2.36, 1.20), then:
[0082]
[0083]
[0084] The direction angles of the motion trajectories of the A target and the B target are 0 degree and 66.03° respectively.
[0085] 4) Since the above two direction angles are not equal, it is judged that the trajectories of the A target and the B target int...
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The invention belongs to the technical field of urban expressway traffic management, and particularly relates to an expressway transition area latent traffic conflict type analysis method based on a traffic scene radar. The expressway transition area latent traffic conflict type analysis method comprises the following steps arranging the traffic scene radar on an expressway transition area, setting the mounting height and mounting angle of the traffic scene radar and performing calibration; acquiring real-time data of the traffic scene radar; calculating a relative coordinate system distance between two moving objects in a detected area; determining a latent conflict between the moving objects; and obtaining the type of the traffic conflict. According to the expressway transition area latent traffic conflict type analysis method, the advantages of high radar response time, high detection accuracy for the moving object and accurate multi-target tracking in the traffic scene radar are used. Online determination for the expressway transition area latent traffic conflict object can be realized, and furthermore online calculation and determination for the traffic conflict type can be realized, thereby realizing a preventive effect for the traffic accident which does not occur, and providing an accurate determination basis for responsibility determination of the traffic accident which has already occur.
Description
technical field [0001] The invention belongs to the technical field of urban expressway traffic management, and in particular relates to a method for discriminating potential traffic conflict types in expressway weaving areas based on traffic scene radar. Background technique [0002] Potential traffic conflict is when two or more traffic elements approach or intersect each other at the same time and space under observable conditions. If at least one of them takes avoidance measures, such as changing directions and stopping suddenly, the danger will be eliminated. ; Otherwise, a collision will occur, resulting in a traffic accident. In the real traffic environment, the study of potential traffic conflicts is an important part of road traffic safety management. The linear causality shows that there is a good linear relationship between traffic accidents and traffic conflicts. Through the conflict angle of the motion trajectories of the two moving targets, the type of confli...
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IPC IPC(8): G08G1/16
Inventor 孙晓静邹娇唐述强林家骐强雯吴亚峰李绍甫徐戚
Owner ANHUI SUN CREATE ELECTRONICS