【作者】 朱海涛；

【导师】 张晓龙；

【作者基本信息】 西南交通大学 ， 电力系统及其自动化， 2003， 硕士

【摘要】 模式识别是人工智能中一个重要的领域，它是通过计算机用数学分析的方法来研究模式的自动处理和判读，使得人类有可能研究复杂的信息处理过程。随着计算机技术的发展，模式识别技术被广泛地应用到人工智能、计算机工程、机器人学、神经生物学等重要领域，其基本理论和方法也正日益丰富。本论文以模式识别的基本理论为依据，对车型自动识别系统做了较为深入的研究和探讨。 车型自动识别是当前智能交通运输系统热点研究方向之一，是高速公路实现不停车收费系统的核心技术，具有广阔的应用前景。本文根据优创集团泛安科技开发(石家庄)有限公司关于保定至天津高速公路机电设备更新项目的要求，设计了一种基于感应线圈的车型识别系统，该系统主要由数据采样、采样波形特征提取及车型模式匹配三大部分组成。 本文详细介绍了数据采样部分的组成、工作原理及硬件结构，并列举了几种常见车型的实际采样波形。通过分析采样数据和比较各车型波形后，采用实际采样波形的幅值作为车型分类判据标准，整条波形的采样值作为模式匹配的特征参数。 因为车辆每次经过感应线圈时的速度不同，所以采样波形存在伸缩变化。在进行车型模式匹配时，为了能使采样波形中的相似特征对齐，本文提出了对称式DTW算法和非对称式DTW算法配合使用的方案。并通过实例仿真，验证了该方案的可行性，并获得了很高的车型识别率。更多还原

【Abstract】 Pattern recognition is one of the most important regions of Artificial Intelligence (A.I). It is in order to research complicated process of dealing with information. With the development of computer technology, pattern recognitionisusedtoA.I, computer engineering, robot, nerve-biology e tc widely, which basic theory and method are more richer. The paper is based on the basic theory of pattern recognition, and doing deeply research and discussion about the automatic recognition of automobile type.At present, the automatic recognition of automobile type is one of Intelligent Transportation System (ITS) hot topics, which is the core of the charge system that does not need stop vehicle, and has practice meaning in future. The thesis content came from VATA Ltd. request, which is a vehicle classification system based on inductive loop detectors, made up with data collection sample wave character extracting and automobile type pattern matching.This paper introduces principle of data collection and hardware frame, and examples some common automobile type of data ware at the same time. After analyzing data and comparing automobile type of data ware, the max-data as criterion of vehicle classification, whole sample’s data as character parameter of pattern matching.Because of different velocity through inductive loop detector, sample ware has flexibility. When doing automobile type pattern matching, in order to keep similar character consistent, the paper put forward the project that symmetry DTW and non- symmetry DTW use together. By using MATLAB software, I validate feasibility of this arithmetic, and obtain anticipate effect.更多还原