Method for judging road traffic state based on annular coil of signal lamp system

Abstract

The invention relates to a method for judging the road traffic state based on an annular coil of a signal lamp system. In the method, traffic historical data is acquired by using an annular coil detector and subjected to cluster analysis to obtain clustering centers corresponding to different traffic states; and a Euclidean distance between the real-time traffic data and each clustering center is directly calculated when the real-time traffic state is judged so as to judge that the current traffic state is the traffic state corresponding to the clustering center of which the Euclidean distance is the shortest.

Description

technical field [0001] The invention relates to the field of intelligent traffic monitoring, in particular to a method for judging road traffic status based on a ring coil of a signal light system. Background technique [0002] At present, most of the signal light systems in cities in my country still use the intelligent control system with the ring coil detector as the information collection source. The installation position of the ring coil is generally 20 meters away from the stop line at the intersection. The layout of the loop coil serving the signal light system is as follows: figure 1 shown. [0003] The traffic characteristic parameters collected by the coil include flow, speed and occupancy. Because the change of the traffic state will cause the change of the basic characteristic parameters of the traffic flow, such as the obvious decrease of the speed and the increase of the occupancy rate in the congested state. The constantly changing basic parameters of the t...

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Problems solved by technology

[0008] Moreover, urban roads are affected by signal lights, and the coil detection data has obvious periodic changes. The judgment of traffic status must also take into account the influence of the signal cycle of the signal light system. There is still a lack of research on this aspect in existing algorithms.

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