System and method for recognizing motor vehicles in intelligent transportation system

Abstract

The invention discloses a system for recognizing motor vehicles in an intelligent transportation system. The recognizing system comprises a detector, a receiving antenna and a PC. The detector is a passive millimeter wave detector and is composed of a low noise amplifier, a square-law detector, a video amplifier, a signal processing unit and a power supply unit. The receiving antenna is a millimeter wave antenna. The recognizing method includes the steps that first, the millimeter wave detector works, and a vehicle moves towards a detection area of the detector; second, the millimeter wave detector observes the detection area and outputs signals; third, the PC compares the voltages of output signals of the detector with preset threshold voltages for detecting whether the vehicle can pass or not, and a judgment is made; fourth, under the condition that the judgment that the vehicle can pass is made, the PC compares the voltages of the output signals of the detector with preset threshold voltage ranges of different vehicle models, and according to the fact that the voltages of the output signals of the detector fall into the threshold voltage range of a certain vehicle model, the PC makes a corresponding vehicle type recognizing judgment for allowing the vehicle to pass.

Description

technical field [0001] The invention belongs to the field of intelligent transportation, and in particular relates to a motor vehicle identification system and method in intelligent transportation. Background technique [0002] The modern intelligent transportation system (Intelligent Transportation System, ITS) is an advanced integrated traffic management system, which makes traffic safer and more efficient through the cooperation of advanced sensing technology, advanced communication means and computer processing technology. Efficiency, more reliability, more environmental protection, more time and cost saving. [0003] As one of the advanced sensor technologies of ITS, microwave traffic radar is also called microwave traffic detector, which is different from video detection. The mainstream product in the world is microwave radar combined with high-speed camera to shoot speeding. In terms of traffic flow detection, microwave traffic radar, as the main product, not only g...

AI Technical Summary

Problems solved by technology

[0005] 1. The frequency of microwave is low, so the accuracy of target recognition is lacking, so it is often used as a radar for judging traffic flow in intelligent transportation, and it cannot accurately identify vehicle types;

[0006] 2. Microwave traffic radar works in an active system and emits microwaves to the target, so its power consumption is relatively large; it will cause certain frequency interference to the work of automotive electronics, and it is easy to be intercepted by electronic dogs and other equipment, which brings great harm to traffic detection and law enforcement. Hidden danger

Images