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

Abstract

The invention discloses a millimeter-wave radar-based traffic flow detection system and a detection method thereof, which belong to the technical field of road traffic conditions and solve the problem of traffic flow leakage detection in traditional coils, geomagnetism, and video detectors and the traditional microwave radar in the vehicle speed. When it is low, the detection accuracy is low. It mainly includes millimeter-wave radar detectors, MCU control units and central system unit units erected above the detection road. The present invention can realize vehicle trajectory identification and vehicle numbering, and on this basis, according to different road section scenarios and deployment schemes of millimeter-wave radar detectors, a single-detector traffic flow and road section flow calculation method based on trajectory data is proposed; the method of the present invention It is simple and not redundant, and can accurately determine the state of road traffic flow, with an accuracy rate of over 95%. It provides refined road basic flow data support for traffic control, which is of great significance for improving traffic control effects and improving 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.

Images