共查询到20条相似文献,搜索用时 203 毫秒
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世界著名的汽车零部件生产厂海拉公司最近开发了一种先进的采用成像传感器的车道识别系统,该系统有望在2006年投入市场,这意味着不久的将来,汽车驾驶员可以根据图像来控制汽车的行驶。这种系统可以在汽车行驶时采集汽车周围区域的可视数据,并且在汽车偏离车道时提醒驾驶员注意。 相似文献
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多义性路径识别算法和系统建设是精确收费、精确拆分,实现营改增的基础,论文比较了基于牌照识别、5. 8GHz、GSM、433M等多义性路径识别方式的适用环境,提出了基于5. 8GHz+牌照识别的组合式多义性路径识别系统,研究了从ETC、MTC入口车道、标识站、清分结算中心、出口车道的数据采集及算法流程,提出中心计算为主、车道计算为辅的模式,以达到精确、高效地高速公路网精确路径收费的目标。 相似文献
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微观交通仿真中的车道变换模型 总被引:24,自引:3,他引:24
将车道变换行为分为强制性车道变换和任意性车道变换两种类型,分析了两种车道变换类型的各种常见情形,建立了描述车辆车道变换意图的产生、车道变换可行性分析以及车道变换的实施等行为的车道变换模型。此外,作为一种特殊的车道变换行为,还建立了反映车辆在拥挤状态下的挤车变道行为的挤车变道模型。 相似文献
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针对车牌识别系统实用化存在的问题,在国内首次提出和开发了视频检测和车辆检测线圈组合触发的车牌识别技术。此技术将使高速公路收费车道车牌识别正确率稳定保持在一个较高水平上,同时可以取消车牌识别设备安装的各种限制。 相似文献
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本文介绍了车道偏离报警系统及其国内外的研究现状,重点介绍了基于机器视觉的车道偏离报警系统。对基于机器视觉的车道偏离报警系统中的CPCI架构的硬件结构和车道线实时检测算法进行了描述,提出了一种切实有效的车道线检测算法。 相似文献
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本文通过对收费系统中换卡作弊可能性的分析,在比较了车牌人工输入和自动车牌识别系统在防止换卡作弊优劣的基础上,提出了建立超时表和增加入口车道摄像机,通过提升和挖掘收费系统的整体性能和效率解决防止换卡作弊的技术路线. 相似文献
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为提高汽车的主动安全性并克服现有的汽车偏离车道报警系统所存在的结构复杂和成本高等缺点,文章设计了一种基于Matlab的汽车偏离车道报警系统,利用摄像头获取车道图像并实时传给车内计算机系统,经过对图像一系列的处理分析判断汽车是否偏离车道而进行报警。经验证,该系统能够实时检测出左右车道标志线,可以根据车道夹角法判断汽车是否偏离车道,满足了汽车偏离车道报警的需要。该系统结构简单高效,能显著提高汽车行驶的主动安全性。 相似文献
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Abdelkader Merah Kada Hartani Azeddine Draou 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2016,54(1):86-101
In recent years, the driver's active assistances have become important features in commercialised vehicles. In this paper, we present one of these features which consists of an advanced driver assistance system for lane keeping. A thorough analysis of its performance and stability with respect to variations in driver behaviour will be given. Firstly, the lateral control model based on visual preview is established and the kinematics model based on visual preview, including speed and other factors, is used to calculate the lateral error and direction error. Secondly, and according to the characteristics of the lateral control, an efficient strategy of intelligent electric vehicle lateral mode is proposed. The integration of the vehicle current lateral error and direction error is chosen as the parameter of the sliding mode switching function to design the sliding surface. The control variables are adjusted according to the fuzzy control rules to ensure that they meet the existence and reaching condition. A new fuzzy logic-based switching strategy with an efficient control law is also proposed to ensure a level of continuous and variable sharing according to the state of the driver and the vehicle positioning on the roadway. The proposed control law acts either at the centre of the lane, as a lane keeping assistance system to reduce the driver's workload for long trips, or as a lane departure avoidance system that intervenes for unintended lane departures. Simulation results are included in this paper to explain this concept. 相似文献
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H. G. Jung Y. H. Lee H. J. Kang J. Kim 《International Journal of Automotive Technology》2009,10(2):219-228
This paper discusses the market trends and advantages of a safety system integrating LKS (Lane Keeping System) and ACC (Adaptive
Cruise Control), referred to as the LKS+ACC system, and proposes a method utilizing the range data from ACC for the sake of
lane detection. The overall structure of lane detection is the same as the conventional method using monocular vision: EDF
(Edge Distribution Function)-based initialization, sub-ROI (Region Of Interest) for left/right and distance-based layers,
steerable filter-based feature extraction, and model fitting in each sub-ROI. The proposed method adds only the system for
confining lane detection ROI to free space that is established by range data. Experimental results indicate that such a simple
adaptive ROI can overcome occlusion of lane markings and disturbance of neighboring vehicles. 相似文献
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基于成像模型的车道线检测与跟踪方法 总被引:1,自引:0,他引:1
针对结构化道路上存在非车道线标记干扰的情况,提出一种基于成像模型的线扫描车道线检测及跟踪方法。检测算法中首先对路面图像进行形态学高帽变换预处理,然后建立前方道路图像的成像模型,将图像坐标系中车道参数和世界坐标系中实际车道参数对应,对图像进行初扫描,利用边缘贡献函数及RANSAC算法选取最确定线后,以此线为标准进行二次扫描,得到边缘点后统计边缘贡献函数局部最大值并拟合成直线车道线。跟踪算法中运用Kalman滤波器预测车道线区域,并提取符合标准的控制点拟合成模型为B样条的车道线。试验结果表明:该方法能够快速准确地在复杂环境中提取多个车道线,尤其对存在非车道线道路标记干扰的情况有显著效果。 相似文献
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为了给大型营运客车换道预警系统设计提供参考,采用毫米波雷达、激光雷达、车道线识别传感器、GPS、视频监控系统以及控制器局域网(CAN)总线数据采集仪等设备,基于小型乘用车搭建浮动车采集平台。通过在试验线路上进行1.5×104 km的驾驶试验,获取1 200余次营运客车的真实换道数据。以Jula提出的换道安全性模型为基础,结合营运客车的换道行为特征,通过分析换道进程结束后客车需要与周围车辆保持的安全距离,建立适合于营运客车的3类换道安全性识别模型(客车与自车道前方车辆、目标车道前方车辆、目标车道后方车辆),并利用真实数据对3类模型进行验证。研究结果表明:客车换道持续时间均值为10.4 s,换道起始时刻与目标车道后方车辆的距离为10.0~40.0 m;所有换道样本中,73.3%的换道过程中客车速度要高于目标车道后方车辆,且超过90%的换道过程是由前方慢车引起;不同的速度区间下,车速和航向角联合变化情况下,驾驶人控制营运客车的横向偏移速度保持稳定,可认为客车驾驶人的心理预期换道进程存在固定经验模式,这与小型车换道的研究结论存在较大差异,传统的TTC预警算法识别率较低,在不同速度区间情况下,所提出的模型对客车与自车道前方车辆、目标车道前方车辆、目标车道后方车辆的换道安全识别评价准确率均超过了90%。 相似文献
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A. Mortazavi A. Eskandarian R. A. Sayed 《International Journal of Automotive Technology》2009,10(3):391-404
Driver drowsiness is a major safety concern, especially among commercial vehicle drivers, and is responsible for thousands
of accidents and numerous fatalities every year. The design of a drowsiness detection system is based on identifying suitable
driver-related and/or vehicle-related variables that are correlated to the driver’s level of drowsiness. Among different candidates,
vehicle control variables seem to be more promising since they are unobtrusive, easy to implement, and cost effective. This
paper focuses on in-depth analysis of different driver-vehicle control variables, e.g., steering angle, lane keeping, etc.
that are correlated with the level of drowsiness. The goal is to find relationships and to characterize the effect of a driver’s
drowsiness on measurable vehicle or driving variables and set up a framework for developing a drowsiness detection system.
Several commercial drivers were tested in a simulated environment and different variables were recorded. This study shows
that drowsiness has a major impact on lane keeping and steering control behavior. The correlation of the number and type of
accidents with the level of drowsiness was also examined. Significant patterns in lateral position variations and steering
corrections were observed, and two phases of drowsiness-related degradation in steering control were identified. The two steering
degradation phases examined are suitable features for use in drowsiness detection systems. 相似文献