Branch vehicle afflux early warning system for vehicles coming and going on main road

Abstract

The invention relates to a branch vehicle afflux early warning system for vehicles coming and going on a main road. The system comprises a branch vehicle detection system used for detecting branch vehicle appearance information through two-dimensional laser radar detection equipment, and a main road intelligent early warning sign used for prompting a main road driving vehicle through a detection result. The branch road vehicle detection system is arranged at the edge of a branch road and is 30-50 meters away from a branch road intersection, the two-dimensional laser radar detection equipment is vertically downward, and is installed facing a road, the main road intelligent early warning sign is arranged on a main road, is about 5-10 meters away from the branch road intersection and is arranged facing the direction of coming vehicles of the main road, and the branch road vehicle detection system is in real-time communication with the main road intelligent early warning sign in wired andwireless transmission modes. Compared with the prior art, the system has the advantages of stable, accurate, efficient and all-weather detection and the like.

Description

technical field [0001] The present invention relates to the technical field of road traffic early warning, in particular to a branch road vehicle inflow early warning system for vehicles passing through main roads. Background technique [0002] The ultra-high population density and increasing car ownership in domestic cities have contributed to the high density of arterial road networks in urban road construction. During the planning and construction of domestic district-style cities, many non-signal-controlled arterial road-branch road intersections have been formed. Due to the high design speed of the main road and the lack of reasonable and effective traffic control measures at the intersections, such intersections have great potential safety hazards. figure 1 shown). In addition, under the conditions of night, fog, heavy rain, etc., the visibility of the driving environment becomes poor, and the visibility is reduced, especially the large light and dark difference betw...

AI Technical Summary

Problems solved by technology

These detection methods have their own limitations: 1) The coil detection technology has been gradually replaced by other technologies due to its defects such as easy damage and high maintenance costs.

2) The geomagnetic detection technology uses the principle that the upper object cuts its magnetic field to generate disturbances for detection. Since the branch road is narrow and the two-way lanes are close together, it is largely affected by the vehicles entering the branch road from the main road during the detection process. interference, resulting in frequent false detections and false alarms, greatly reducing the credibility of the warning function

(3) The error of infrared induction is large, the detection range is difficult to control, and it is also prone to false detection or even missed detection; and it is not suitable for branch road vehicle detection

(4) Ultrasonic radar can perform accurate detection, but its cost is relatively high, so it is difficult to popularize in such not very typical traffic environments

5) Video detection technology is widely used in intelligent transportation systems, but it is always difficult to achieve high-precision and all-weather detection guarantees (especially in poor light conditions)

In addition, due to the huge amount of information in the image processing means, in order to increase the calculation rate, the relevant high-precision video detection technology often requires expensive hardware requirements.

In short, for the situation of branch road traffic flow, the above detection methods have their own limitations

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