一种基于单线圈速度估计的简单模型方法

A Simple Model Method of Single-Loop Data Based for Speed Estima tion

实时准确的交通速度对于成功的快速路管理系统来说是至关重要的。然而,交通速度并不能直接从单线圈检测器测量出来。论文提出了一种基于单线圈输出量进行速度估计的简单模型方法。该方法考虑自由流和拥挤状态下分别采用不同的模型进行速度估计。利用该方法估计出来的速度非常接近于双线圈测量的速度观测值。与以往的算法相比,该方法简单实用并且明显地改善了速度估计。

The accurate,real-time traffic speed data are important for a successful freeway traffic management system.Unfortunately,vehicle speeds cannot be directly measured by single-loop detectors.In this paper,a simple model method of single-loop data based for speed estimation is presented,different models are used to estimate speed according to different traffic conditions such as free flow and congested flow.Speeds estimated by this method are very close to the speeds observed by the corresponding dual-loop detector.Compared to the commonly adopted speed estimation algorithm,the proposed method improves estimation accuracy significantly.