Roadside dual beam microwave radar traffic flow detection device and method

Abstract

The invention relates to a roadside dual beam microwave radar traffic flow detection device and a roadside dual beam microwave radar traffic flow detection method. The roadside dual beam microwave radar traffic flow detection device comprises a first antenna, a second antenna, a first microwave transceiving module, a second microwave transceiving module, a waveform generating module, an intermediate frequency filtering module, an AD acquisition module, a DSP co-processor, a DSP main processor and a communication interface. The first antenna and the second antenna are placed on the roadside and vertical to the lane direction for transmitting and receiving microwaves, a digital signal processor DSP acquires echoes, and the DSP main processor and the DSP co-processor conduct statistical calculation on traffic flow, occupation ratio and average vehicle speed. According to the roadside dual beam microwave radar traffic flow detection device and the roadside dual beam microwave radar traffic flow detection method, the microstrip antennas capable of transmitting two independent wave beams are adopted, information of ten bidirectional lanes can be detected at most, and the system can adapt to various kinds of ground clutters, harsh weather conditions and vast dust interference in an industrial field.

Description

technical field [0001] The invention relates to the field of intelligent transportation, in particular to a roadside double-beam microwave radar traffic flow detection device and method. Background technique [0002] With the development of society and the rapid increase of urban population, urban vehicles also increase rapidly. The intelligent transportation system is responsible for alleviating the increasingly serious traffic problems. Traffic flow information is a very important source of information for intelligent transportation systems. There are various detection methods such as ground induction coils, video detection, and microwave radar detection. Ground sense coil detection is rarely used at present because it needs to damage the road surface during installation and block traffic during maintenance. Due to factors such as road reflections, ponding, shadow reflections, day and night transitions, and severe weather, video detection is difficult to obtain all-weathe...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of inaccurate speed measurement of existing microwave radar installed laterally, the present invention provides a roadside dual-beam microwave radar traffic flow detection device and method, which can accurately measure the traffic flow and occupancy rate of each vehicle at the same time speed

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