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Curve early warning implementation method based on video speed measurement

An implementation method and a technology for corners, which are applied in the field of corner warning implementation based on video speed measurement, and can solve problems such as the inability to improve the safety of vehicles entering a corner.

Active Publication Date: 2018-10-12
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the deficiencies in the existing technology, the purpose of the present invention is to provide a method for implementing curve warning based on video speed measurement, and to solve the problem in the prior art that the safety of vehicles entering a curve cannot be improved from the perspective of road service functions.

Method used

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  • Curve early warning implementation method based on video speed measurement
  • Curve early warning implementation method based on video speed measurement
  • Curve early warning implementation method based on video speed measurement

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Embodiment

[0041]This embodiment provides a method for implementing a curve warning based on video speed measurement, which is characterized in that it is used for a target curve, and a monitoring area is set in front of the target curve, and the method includes:

[0042] Obtain the vehicle image when the vehicle enters the monitoring area; such as figure 1 As shown, in this embodiment, the video sensor installed at the curve collects the vehicle image when the vehicle enters the monitoring area.

[0043] Calculate the speed and acceleration of the vehicle passing through the monitoring area through the vehicle image;

[0044] Specifically, a plurality of deceleration markings are arranged at equal intervals on the road in the monitoring area.

[0045] Assuming that the driving direction of the vehicle in the monitoring area is the y direction, the coordinates of the deceleration markings along the vehicle driving direction in the y direction are respectively y 01 ,y 02 ,...,y 0i , i...

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Abstract

The present invention provides a curve early warning implementation method based on video speed measurement. The method is used for a target curve, and a monitoring area is arranged at front of the target curve. The method comprises the steps of: obtaining vehicle images when a vehicle enter the monitoring area, and calculating the speed and the accelerated speed of the vehicle passing through themonitoring area through the vehicle images; pre-estimating the speed of the vehicle entering the target curve according to the speed and the accelerated speed of the vehicle passing through the monitoring area; obtaining the model contour of the vehicle according to the vehicle images so as to estimate the critical safe vehicle speed of the vehicle at the target curve; if the speed of the vehicleentering the target curve is smaller than 0.85 of the critical safe vehicle speed, determining that the vehicle is in a safe state at the target curve; if the speed of the vehicle entering the targetcurve is larger than 0.85 of the critical safe vehicle speed and smaller than the critical safe vehicle speed, allowing the vehicle to reduce the speed for running; and if the speed of the vehicle entering the target curve is larger than the critical safe vehicle speed, allowing the vehicle to perform braking operation.

Description

technical field [0001] The invention belongs to the technical field of vehicle-road coordination, and in particular relates to a method for realizing a curve early warning based on video speed measurement. Background technique [0002] With the increasing number of motor vehicles, traffic management needs more efficient and feasible methods to maintain traffic order. In the existing vehicle speed measurement system, radar speed measurement, laser speed measurement, and coil speed measurement are more popular, and the technology is relatively mature; however, radar speed measurement is expensive and easy to be counter-detected by electronic dogs, and induction coil speed measurement can only be used for fixed point monitoring. The measurement repeatability is low, the data fluctuation is large, and there is some damage to the road surface. Laser speed measurement has high accuracy but the data repeatability is quite bad. In comparison, video speed measurement does not requi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G08G1/015G08G1/017G08G1/054G08G1/0967
CPCG08G1/015G08G1/0175G08G1/054G08G1/0967
Inventor 陈涛尹珩沣刘虹伯
Owner CHANGAN UNIV
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