Laser ranging-based road traffic monitoring device

Abstract

The invention provides a laser ranging-based road traffic monitoring device. The device includes an industrial personal computer, a processor and a laser sensor array; the laser sensor array is arranged on an overhead frame above the lanes of a road; laser light emitted by every two laser sensors is vertically emitted to the road surface of each lane so as to perform uninterrupted high-frequency ranging; the processor is connected with the laser sensors, judges the passage of a vehicle according to ranging data sent from the laser sensors to the processor, records a time point Tstart when thehead of the vehicle reaches a position where a first laser beam is located, and a time point Tend2 when the tail of the vehicle leaves the position where the first laser beam is located, and records atime point Tend1 when the head of the vehicle reaches a position where a second laser beam is located; and the industrial personal computer is connected with the processor, and calculates the height,length and speed of the vehicle according to the ranging data, the time point Tstart, the time point Tend2 and the time point Tend1 sent by the processor. The device of the invention works stably under various environmental conditions, can measure the height of the vehicle, can recognize the contour of the vehicle, and is beneficial to vehicle model classification and the identification of over-long and over-high vehicles.

Description

technical field [0001] The invention relates to the technical field of road traffic monitoring, in particular to a road traffic monitoring device based on laser ranging. Background technique [0002] With the integration of the global economy and the increase of car ownership year by year, the traffic accident rate caused by vehicles running on the road is also increasing sharply. One of the traffic accidents is speeding. In order to effectively curb the traffic accidents caused by speeding, the traffic management department has enabled the automatic detection system of motor vehicle speeding in the road speed limit area and mobile speed measurement. At present, the speed measurement error of the most commonly used motor vehicle speed measurement system by the traffic management department reaches 1km / h, although its error has met the requirements of JJG528-2004 "Motor Vehicle Radar Speed ​​Meter Verification Regulations" and JJG527-2007 "Motor Vehicle Speeding Automatic Mon...

AI Technical Summary

Problems solved by technology

[0006] The disadvantages of the above-mentioned traffic monitoring equipment in the prior art are: the laser transmitter and the laser receiver have no distance measuring function, the laser trigger electrical signal is used for timing when the head and tail of the vehicle enter and exit, the vehicle classification is only based on the length of the vehicle, and the vehicle type classification is not accurate enough

The accuracy and stability of the laser transmitter and laser receiver have high requirements on the environment, and the monitoring effect is poor in rainy, foggy, snowy and night

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