Three-dimensional traffic information collection radar and achieving method

Abstract

The invention discloses a three-dimensional traffic information collection radar and an achieving method. The radar device comprises a DDS, a modulator, a power amplifier, a transmitting antenna, a mixer, receiving antennas, a low frequency amplifier, a signal processor and a communication interface. According to the three-dimensional traffic information collection radar and the achieving method, the linear frequency modulated continuous wave technology and the coherent technology are combined to achieve simultaneous detecting of multi-lane and multi-target, distance information of targets is acquired through the LFMCW technology, and the corresponding lanes of the targets are distinguished through the multi-receiver phase; the speeds of the targets are computed by the adoption of the MTD algorithm, and over speed detecting is conducted; to acquire azimuth information of the target, echo signals of the target are received simultaneously by the two receiving antennas arranged at a certain distance, phase analysis of the signals is conducted, and the azimuth angles of the targets are acquired. By means of the three-dimensional traffic information collection radar and the achieving method, the speed information, the distance information and the azimuth information can be detected simultaneously, and ten lanes and up to 100 targets can be tracked and positioned simultaneously.

Description

technical field [0001] The invention belongs to the technical field of intelligent traffic, and in particular relates to a three-dimensional traffic information acquisition radar capable of simultaneously detecting the distance, orientation and speed of a target and an implementation method thereof. Background technique [0002] In recent years, with the rapid economic development and the acceleration of urbanization, my country's transportation infrastructure is under enormous pressure. Through the effective management and deployment of intelligent transportation systems (ITS) led by information technology, the traffic capacity and efficiency of the existing road network can be improved, traffic congestion can be reduced, and the impact of environmental carbon emissions can be reduced. Real-time traffic information acquisition is the premise and key to realize ITS. Real-time traffic information includes vehicle speed monitoring, traffic flow statistics, vehicle detection, ...

AI Technical Summary

Problems solved by technology

Its basic working method is to use the microwave signal to form a narrow beam under the action of the antenna to cast a radio wave area on the road. Once a car enters the area, the radar can detect it; however, the radio wave area is affected by the side lobe of the antenna in actual engineering It is not easy to control accurately, and this method cannot obtain the distance information of the vehicle, which leads to inaccurate trigger signals to the camera, resulting in some invalid data; another disadvantage of this type of radar is that it can only measure targets with a speed of more than 20 kilometers per hour.

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