Traffic flow detection system based on millimeter-wave radar and detection method thereof

Abstract

The invention discloses a traffic flow detection system based on millimeter-wave radar and a detection method thereof, belonging to the technical field of road traffic states. According to the systemand the method, the problems of the traffic flow missing detection of a traditional coil, terrestrial magnetism and a video detector and the low detection accuracy rate of traditional microwave radarin a relatively low vehicle speed are solved. The system comprises a millimeter-wave radar detector, an MCU control unit and a central system unit which are bridged above a detection road. According to the system, the track recognition and numbering of vehicles can be realized, the scheme is deployed on this basis according to different road-section scenes and the millimeter-wave radar detector, and a method for calculating traffic flow and road-section flow of a single detector based on track data is disclosed; the method is simple and is not tedious, the state of road traffic flow can be accurately distinguished, the accuracy rate can reach 95% or above, the refined road basic traffic data support is provided for the traffic management and control, and the method has important significances on the improvement of the traffic control effect and the traffic management efficiency.

Description

technical field [0001] The invention belongs to the technical field of road traffic status, and in particular relates to a traffic flow detection system and a detection method based on millimeter wave radar. Background technique [0002] Real-time and accurate collection of road traffic status is the prerequisite for implementing effective traffic control measures. The parameters describing the state of road traffic include traffic flow, speed, occupancy, queuing length, intersection delay, etc., among which, traffic flow refers to the traffic entity passing through a certain location, a certain section or a certain lane of the road within a selected time period It is one of the most basic and important traffic status indicators. Traditional traffic flow collection is mainly realized by geomagnetic, coil, video, microwave radar and other detectors arranged on the section of the road. In practical engineering applications, it is found that these detectors have many shortcomi...

AI Technical Summary

Problems solved by technology

For example, geomagnetism and coils are easily interfered by adjacent vehicles, resulting in missed or false detections; video detection equipment depends on environmental conditions such as weather and visibility, and there will also be a large degree of missed detections; traditional microwave radar detectors. The system uses The Doppler principle detects moving vehicles. When the speed of the vehicle is low, there is a problem of target loss, and it is impossible to accurately determine the road traffic and vehicle speed.

In addition, traditional detector systems and detection methods only collect cross-sectional traffic data, and cannot obtain local traffic conditions, let alone track vehicle trajectories.

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