The invention discloses a self-adaptive traffic incident detection method based on small step length adjustment. The method comprises the following steps: Step 1, dynamically determining a detection frequency; Step 2, calculating traffic parameters and traffic parameter statistics; Step 3, calculating traffic parameter characteristics; Step 4, carrying out threshold comparison, and outputting a traffic incident detection result; and Step 5, calculating a historical false drop rate, and carrying out small-step adjustment on the traffic parameter characteristic threshold according to the historical false drop rate. According to the method, the detection frequency is dynamically determined, ETC portal data is acquired, then traffic parameter characteristics including the road section average speed variation and the vehicle speed dispersion variation are calculated according to the acquired data, meanwhile, the traffic parameter characteristics are compared with threshold values of the traffic parameter characteristics, a traffic event detection result is determined, finally the historical false detection rate is calculated, an updating formula of a traffic parameter characteristic threshold is determined according to a historical false detection rate, so as to carry out small-step adjustment on the threshold, thereby realizing adaptive real-time efficient detection of the traffic event.
本发明公开了一种基于小步长调整的自适应交通事件检测方法,包括以下步骤:Step1:动态确定检测频率;Step2:计算交通参数和交通参数统计量;Step3:计算交通参数特征;Step4:进行阈值比较,输出交通事件检测结果。Step5:计算历史误检率,根据历史误检率对交通参数特征阈值进行小步长调整。本发明通过动态确定检测频率,获取ETC门架数据,然后根据所获取的数据计算交通参数特征,包括路段平均速度变化量和车辆速度离散度变化量,同时将交通参数特征与其阈值进行比较,确定交通事件检测结果,最后计算历史误检率,根据历史误检率确定交通参数特征阈值的更新公式,以此对阈值进行小步长调整,从而实现交通事件的自适应实时高效检测。
Self-adaptive traffic incident detection method based on small step adjustment
一种基于小步长调整的自适应交通事件检测方法
2021-05-07
Patent
Elektronische Ressource
Chinesisch
IPC: | G08G Anlagen zur Steuerung, Regelung oder Überwachung des Verkehrs , TRAFFIC CONTROL SYSTEMS |
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