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描述了1种GPS定位信息和电子地图收费路段匹配的方法,分为地图精简和地图匹配2部分。根据GPS定位收费系统对地图及地图匹配的要求,对电子地图进行了精简。路段识别采用了GPS位置点和路段收费位置节点的匹配方法,通过设定收费标示值,配合路段间拓扑关系、路段的收费属性值信息,进行地图匹配计算,判断当前车辆是否行驶在收费路段上,从而对行驶在收费路段的车辆进行通行费用计算、对收费地图信息进行精简处理、探讨分析影响地图匹配精度的因素、描述地图匹配的方法。该方法经过实验检测,并在高速公路卫星收费实验系统中实际运行,效果良好。 相似文献
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在车辆导航系统中,通常采用GPS来获得车辆的位置信息,并准确地在电子地图上显示和定位。可以认为通过GPS获得定位数据是GIS的一种数据采集方式。它可以实现车辆位置的实时、动态确定。利用目前较先进的组建式GIS技术开发了一套能够实时动态显示模拟GPS信息的电子地图,具有较高的实用和教学意义。 相似文献
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基于组件式GIS的模拟导航电子地图设计 总被引:1,自引:0,他引:1
在车辆导航系统中,通常采用全球定位系统GPS获得车辆位置信息,并准确在电子地图上显示和定位,可认为通过GPS获得定位数据是地理信息系统GIS的一种数据采集方式。文中利用目前较先进的组件式GIS技术开发了一套能实时动态显示、模拟GPS信息的电子地图。 相似文献
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汽车先进驾驶辅助系统在应用时要根据不同的车辆行驶工况对车辆进行相应的控制,而准确的车辆行驶工况识别信号是合理的控制策略的基础.为了得到准确的车辆行驶工况识别信号,利用视觉传感器分别对车辆跟踪定位,以及车道线检测技术进行了研究.利用adaboost分类器检测出前方车辆;应用文中提出的基于坐标映射与定比分线并能够抵抗俯仰角干扰的测距方法进行车辆定位,验证结果显示该测距方法误差小于1m;再应用改进后的基于置信度判断与Kalman滤波技术的车道线跟踪检测方法进行车道线检测,并通过实车道路试验对此进行了验证,验证结果显示该车道线检测方法误差小于1°.提出1种基于PreScan的将所应用的车辆跟踪测距与车道线跟踪检测方法相结合的方法,用以实现汽车ADAS纵向行驶工况的识别,并通过PreScan仿真场景验证了该工况识别方法,结果表明该方法能够为ADAS提供准确的工况识别信号. 相似文献
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Today's urban road transport systems experience increasing congestion that threatens the environment and transport efficiency. Global Navigation Satellite System (GNSS)-based vehicle probe technology has been proposed as an effective means for monitoring the traffic situation and can be used for future city development. More specifically, lane-level traffic analysis is expected to provide an effective solution for traffic control. However, GNSS positioning technologies suffer from multipath and Non-Line-Of-Sight (NLOS) propagations in urban environments. The multipath and NLOS propagations severely degrade the accuracy of probe vehicle data. Recently, a three-dimensional (3D) city map became available on the market. We propose to use the 3D building map and differential correction information to simulate the reflecting path of satellite signal transmission and improve the results of the commercial GNSS single-frequency receiver, technically named 3D map-aided Differential GNSS (3D-DGNSS). In this paper, the innovative 3D-DGNSS is employed for the acquisition of precise probe vehicle data. In addition, this paper also utilizes accelerometer-based lane change detection to improve the positioning accuracy of probe vehicle data. By benefitting from the proposed method, the lane-level position, vehicle speed, and stop state of vehicles were estimated. Finally, a series of experiments and evaluations were conducted on probe data collected in one of the most challenging urban cities, Tokyo. The experimental results show that the proposed method has a correct lane localization rate of 87% and achieves sub-meter accuracy with respect to the position and speed error means. The accurate positioning data provided by the 3D-DGNSS result in a correct detection rate of the stop state of vehicles of 92%. 相似文献
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J. H. Lim K. H. Choi J. Cho H. K. Lee 《International Journal of Automotive Technology》2017,18(2):345-356
For land vehicle navigation in urban area, Global Positioning System (GPS) receivers often suffer from the lack of positioning accuracy, availability, and continuity due to insufficient number of visible satellites and multipath errors. To mitigate this problem, this paper proposes an efficient hybrid positioning method combining a single frequency GPS receiver and a monocular vision sensor. The proposed method is advantageous in that it requires only low-cost hardware and no external map aiding. Compared with existing vision-based methods, the proposed method directly measures absolute heading angle based on the images of straight road segments. For the reason, the proposed method is resilient to multipath errors. The performance of the proposed method is evaluated by the experiments with field-collected real measurements; one with good satellite visibility and the others with poor satellite visibility. Comparison with existing positioning methods demonstrates the feasibility of the proposed method in urban area. 相似文献
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Driving road identification is the key issue of a vehicle navigation system that supports various services of intelligent transportation systems. The method for driving road identification is also known as map matching (MM). In spite of the development of MM algorithms, limitations still exist in obtaining the positioning data and preparing candidate roads (CRs) that may result in mismatches in some special difficult road configurations such as flyovers and parallel roads. To overcome the limitations, an integrated trajectory-based MM (tbMM) system is proposed based on the trajectory similarity evaluation method. The system can fuse the information from global positioning systems (GPS) and inertial sensors to generate the vehicle trajectory that represents the vehicle continuous movement in three dimensions. The elevation data of vehicle and roads are involved to enhance the trajectory-based matching process. Also the method employs an optimized mechanism for generating and maintaining CRs. Using the mechanism, separated road segments in a digital map are reorganized in the form of possible driving roads and the topology among them is guaranteed. Moreover, the CRs are obtained considering all the possibilities in determining the driving road so that the valuable historical information can be effectively reserved to provide more reliable matches in ambiguous situations. The tbMM system was evaluated using a number of real-world vehicle-level test datasets in urban areas in Beijing. Also a comparison test was performed to evaluate the driving road identification accuracy against existing MM algorithms. The results show that the tbMM system can provide reliable matches with about 99% accuracy in all the difficult scenarios and outperforms the existing algorithms. 相似文献
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为提高智能车节点定位准确率, 研究了基于3D点云语义地图表征的智能车定位方法。该方法分为3个部分: ①基于三维激光点云的语义分割, 包括地面分割, 交通标志牌分割和杆状语义目标分割; ②面向智能车的点云语义地图表征, 利用分割的语义目标投影, 生成带权有向图, 语义路, 语义编码, 再以语义编码和高精度GPS的全局位置组成语义地图表征模型; ③基于语义表征模型的智能车定位, 包括基于GPS匹配的粗定位和基于语义编码渐进匹配的节点定位。实验在3种长度不同、复杂度不同的道路场景下进行, 节点定位准确率分别为98.5%, 97.6%和97.8%, 结果表明所提出的定位方法节点定位准确率高、鲁棒性强且适用于不同的道路场景。 相似文献
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In this research, a hybrid dead reckoning error correction scheme is developed based on extended Kalman filter (EKF) and map matching (MM) to improve the positioning accuracy for vehicle self-localization. The developed method aims at obtaining accurate positions when the GPS signals are occasionally unavailable or weakened. First, the heading data collected from an odometer and an optical fiber gyroscope are integrated by an EKF to reduce the random errors in dead reckoning. Then a modified topological MM algorithm is developed to reduce the systematic errors in dead reckoning. In this work, both cross-track errors and along-track errors are considered to improve positioning accuracy of MM. The errors are finally corrected using the results achieved from both the dead reckoning and the MM when the driving distance of a vehicle exceeds a predefined length or the vehicle turns in an intersection. Experiments have been conducted to evaluate the developed method and the results show that the maximum error and average error of dead reckoning can be respectively reduced to 15.4?m and 5.2?m during the experiment with total distance of 43?km. This positioning accuracy is even better than the accuracy of the low-cost GPSs which are usually at the order of 15–20?m (95%). The developed method is effective to achieve the positions of the vehicle when the GPS signals are occasionally unavailable or weakened. 相似文献
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依托于浮动车数据,基于地图匹配对城市道路交通状态模糊综合判别方法进行深入研究.首先根据浮动车数据特点和道路交通信息,基于Mapbasic编程对数据进行地图匹配,并进行MapInfo二次开发,通过相关模型计算指定时段内的道路交通参数.建立模糊综合评价判别模型,对判别结果量化处理,以最大隶属度原则确定道路交通状态.最后,选... 相似文献