Device and method for detecting vehicles by using high-frequency radio waves

Abstract

The invention discloses a vehicle induction detection device for a road junction traffic control system, and particularly relates to a device for detecting vehicles by using high-frequency radio waves. The detection device comprises a vehicle-mounted high-frequency signal transmitter (21) arranged on each vehicle and a road high-frequency signal receiver (22) which is arranged at the junction. The output signal of the road high-frequency signal receiver (22) is sent to a road signal lamp controller (12), and the road signal lamp controller (12) is used for controlling traffic signal lights (13) to direct the traffic. The device for detecting the vehicles by using the high-frequency radio waves is suitable for an intelligent control device for the road junction traffic signal lights. By using the detection device, the traffic lights can be controlled with a purpose to correctly realize green lights at the junctions with the vehicles, and the green lights in the corresponding directions are lightened according to the required running directions of the vehicles; the priority passing of buses and special vehicles (fire trucks, ambulances and the like) at the junctions can be realized; and the traffic jam at the junctions can be effectively prevented.

Description

technical field [0001] The invention relates to a vehicle induction detection device used in a traffic control system at an intersection, in particular to an induction detection device which uses high-frequency radio waves to detect vehicles. Background technique [0002] A traffic signal control system at an intersection with the function of detecting vehicles, such as figure 1 , consists of a vehicle induction detection device 11 , a road signal lamp controller 12 and a traffic signal lamp 13 . The vehicle induction detection device 11 provides information on vehicles on the road. After obtaining the information, the road signal light controller 12 processes the information through a preset control program to control the traffic signal light 13 to direct the vehicles to pass. [0003] The control system of traffic lights at modern intersections should have a vehicle detection device and be able to detect: [0004] 1 Whether there is a car coming on the road; [0005] 2....

AI Technical Summary

Problems solved by technology

[0010] The disadvantage of geomagnetic coil detection is that the detection range of a single detector is small, and the installation needs to dig the road

[0011] The disadvantage of infrared detection is that it cannot detect the driving direction of the vehicle and cannot detect the type of vehicle

[0012] The disadvantage of ultrasonic detection is that the detection range is small and the type of vehicle cannot be detected

[0013] The disadvantage of video detection is that it cannot detect the driving direction required by the vehicle, and the equipment cost is high

[0014] The disadvantage of radio frequency detection is that the radio frequency signals sent by each vehicle at the same time will interfere with each other

Its disadvantage is that it is difficult to separate the special sound from the alarm sound, which makes the circuit too complicated

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