Expressway abnormal event detection method and system

Abstract

The invention discloses an expressway abnormal event detection method and system, and the method comprises the steps: collecting parallel multi-path optical fiber signals on an expressway through a distributed optical fiber sensing system disposed in an expressway guardrail, and enabling the distributed optical fiber sensing system in the expressway guardrail to be provided with optical fibers in the direction of the expressway, signals of a plurality of detection points are obtained in space, and each optical fiber signal comes from one detection point; performing energy monitoring on each detection point along the highway, regarding the current detection point as a to-be-analyzed detection point when signal output energy is greater than a set threshold value, collecting optical fiber signals of one or more detection points adjacent to the to-be-analyzed detection point, and performing feature extraction on the optical fiber signals of each detection point; performing feature fusion on the features of each to-be-analyzed detection point and the features of the adjacent detection point, and taking the fused features as final features of the to-be-analyzed detection points; and according to the final features of the to-be-analyzed detection point, obtaining a detection abnormal event label of the to-be-analyzed detection point.

Description

technical field [0001] The invention relates to the technical field of expressway abnormal event detection, in particular to a method and system for expressway abnormal event detection. Background technique [0002] The statements in this section merely mention the background technology related to the present invention and do not necessarily constitute the prior art. [0003] Frequent traffic accidents have become a very prominent problem on expressways, so the real-time monitoring of traffic accidents on expressways has become a technical trend. [0004] Existing measures taken for expressway abnormal event detection include methods based on video surveillance and methods based on distributed optical fiber sensing systems in terms of the hardware media used. Among them, the method based on the distributed optical fiber sensing system, in terms of technical implementation algorithms, includes: methods based on traditional feature extraction and classifiers and methods based...

AI Technical Summary

Problems solved by technology

[0006] Chinese invention patent, publication number CN107591002B - a method for real-time estimation of highway traffic parameters based on distributed optical fibers. Although this patent can realize real-time estimation of expressway traffic parameters, the patent uses distributed optical fiber space-time signals to convert them into images. The accuracy is limited by the traditional method of feature extraction and classification.

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