共查询到20条相似文献,搜索用时 453 毫秒
1.
分析研究嵌入式车裁导航信息系统体系结构,以实时多任务嵌入式操作系统Windows CE.NET为嵌入式软件平台,搭建了嵌入式车载导航信息系统的应用环境.以车载导航信息系统的导航电子地图和导航数据库作为重点研究对象.分析导航信息系统中导航电子地图和导航数据库的实现方法. 相似文献
2.
为传统的GPS导航仪配备新型的数字化、可视化的导航电子地图综合显示系统是实现坦克数字化和综合显示控制技术的必要条件,也是未来坦克装甲车辆导航设备的发展方向。本文给出了实现车载导航电子地图综合显示系统的总体方案,针对车载系统和导航电子地图的特点,从软硬件两方面着手,阐述了该系统具体实现的思路和方法。 相似文献
3.
本文以了解导航电子地图核心内容为目的,进行空间数据库更新内容的解析,研究导航过程中地图数据的可行性,解决动态导航中地图数据的实用性与过往更新当中存在的难题,对现有的导航电子地图更新模式与机制进行总结比较。 相似文献
4.
5.
6.
在基于卫星的导航定位系统中,各类用户终端如何真正实现“动态导航”是广大用户对整个系统先进性体会最直观的表现形式之一。因此,进行统一的动态导航电子地图数据结构设计成为实现“动态导航”的关键技术。本文通过研究动态导航电子地图数据结构模型,提出适合数据差分更新的动态导航电子地图数据结构的技术解决方案,为基于卫星的导航定位系统及终端设计提供必要的技术基础。[第一段] 相似文献
7.
最近10年来,卫星定位技术、电子制GPS迅速从政府与科研应用领域扩展到民用导航领域.从机载、舰载车载扩展到便携甚至是手机。舀时期。算能力的提高以及导航电子地图的不断完善和丰中国的GPS导航产业发展已经接近第—个顶峰出更多的创新型应用去刺激下一个高峰的到来需要更丰富的产业链条.开发 相似文献
8.
GPS作为一种广泛应用的定位技术正显示出庞大的市场潜力,尤其是在车辆导航领域。车载导航产品现在主要有两种形式,一是汽车出厂时自带的嵌入式导航终端,二是PND(便携式自导航设备)。这些设备除了提供导航功能外,还增加了MP3,DVD播放等娱乐功能。但是,目前市场上还没有出现专业的通信导航产品。国外也只有基于此构想在Telematics(车载信息系统)领域实现的规模化应用。因此,通信导航无疑是未来的发展方向。 相似文献
9.
10.
GPS/电子地图导航系统研究 总被引:7,自引:0,他引:7
车载GPS/电子地图组合导航定位系统,在GPS接收机与微型计算机接口电路的基础上,实现了数据的实时接收,车辆运动轨迹的标绘,地图的漫游和换图等功能。本文给出了设计方案,讨论了系统功能结构和某些关键问题,介绍了系统实验的有情况,为该系统的实际应用提供了有益的依据。 相似文献
11.
《Journal of Location Based Services》2013,7(2):75-96
This paper reports on a field study comparing navigation performance and user experience of voice, digital map and augmented reality (AR) interfaces for electronic assistance in the context of pedestrian navigation. The in situ study was conducted with two subsequent experiments in the city of Salzburg along a pre-defined route using a self-implemented smartphone application running on Apple's iPhone 4. The study involved 48 participants aged between 22 and 66 years with different experiences in using smartphones and navigation systems. Navigation performance was measured on a micro-level including information on effectiveness (number and reasons of stops, global positioning system (GPS accuracy), efficiency (walking and task completion time, duration of stops) and satisfaction (NASA Task Load Index, System Usability Scale). A final questionnaire completed the study. Between the first and the second experiment, the application was adapted considering user feedback and the previous findings. Results show that in the context of GPS-enhanced pedestrian navigation, digital map and voice-only interfaces lead to significantly better navigation performance and user experience in comparison to AR interfaces. The study also reveals similar results for digital map and voice-only interfaces given that voice instructions are carefully composed. Results lead to the conclusion that AR is still suffering from usability and hardware issues leading to higher uncertainty of navigating persons. Best navigation performance and user experience can be achieved by combining digital maps and accurate voice instructions. 相似文献
12.
随着我国社会经济的快速发展,科学技术的不断进步,卫星定位、移动通信、计算机技术与地理信息系统(Geographic Information System,GIS)不断融合.通过实时采集交通信息,结合动态导航技术,形成基于手机的动态实时导航系统.系统能够满足交通的时空特性与时变性等要求,主要功能是实现地图管理、实时交通信息、轨迹管理与路径规划,为出行者选择最优路径,进行实时导航,从而提高出行者的出行效率,缓解交通压力.在此基础上,对实时交通信息获取、地图匹配与动态路径规划等关键技术进行研究分析. 相似文献
13.
为了满足水下运载体长航时、高精度、低成本的导航需要,提出由激光陀螺单轴旋转捷联惯性导航系统、计程仪、深度计、光纤陀螺捷联式重力仪和数字重力异常图组成的捷联式重力无源导航系统。运载体的位置由激光陀螺单轴旋转捷联惯性导航系统给出;光纤陀螺捷联式重力仪、计程仪和深度计组成水下捷联式重力测量系统,以激光陀螺单轴旋转捷联惯性导航系统提供的位置信息、计程仪提供的速度信息和深度计提供的水深信息作为观测量,应用扩展卡尔曼滤波计算出东、北、天坐标系下加速度计比力值,使用低通滤波实时获得重力值和重力异常值。根据存贮在计算机中的数字重力异常图,运用相关极值法,计算得到运载体位置。2019年底,捷联式重力无源导航系统进行了长时间船载试验,对该系统试验数据进行了离线处理。试验结果表明,在匹配海域内,运载体位置误差小于1个重力异常图格网大小。 相似文献
14.
15.
《Journal of Location Based Services》2013,7(1):46-61
Unlike most paper maps used for navigation, digital maps when displayed on handheld, personal navigation systems do not show the entire mapped extent in a single view, nor are they limited to a fixed map scale. The mapped extent, or footprint of the earth, that appears in any given view is dictated by scale, and there are as many scales as zoom steps. But what drives the choice of scale? We investigate this question first through an assessment of currently available navigation systems, to analyse the consistency or variation among current practices. The vast range of scales and zoom steps found across six software packages indicates an absence of design guidelines, the consequence of which is that users will have a very different experience, with respect to the map, depending on what program they use. Since map representation has been shown to influence spatial behaviour and decision-making, such differences arising from map scale may lead to unintended consequences for navigation system users. We argue that meaningful scales and map extents that incorporate temporal and behavioural aspects of travel as cued by global position system (GPS), can actually convey relevant information to map users. Drawing upon time-geography concepts and real-time data from GPS signals, we explore time-scale bars and isochrones as potential methods of spatiotemporal information delivery to users of personal navigation systems. 相似文献
16.
摘要在传统的手机通讯中往往只能传递文字或者图片的信息.随着社会的发展人们的活动范围也随之扩大,人们对位置服务的需求也越来越突出。为了满足人们对通讯和位置服务的双重需求,基于Android平台通过采用Google地图的强大功能实现了实时地点通讯和导航系统,对系统架构和服务器、客户端实现细节进行了详细的分析。该系统整合了传递文字信息、位置信息及导航的功能,使通讯内容根据实时位置在地图上显示出来。使通讯二维化,方位化,具体化。 相似文献
17.
18.
The quality of navigation service is determined by the accuracy of the available data. For existing navigation services, a full map update is provided in order to keep the map data of mobile devices current. As content and services of mobile devices have recently been diversifying, the size of map data managed in mobile devices has increased, reaching several gigabytes in size. It generally takes tens of minutes to write several gigabytes of data into mobile device storage. For traditional navigation systems, a complicated storage structure called a physical storage format (PSF) is used to assure maximum processing performance of map data in mobile devices within limited resources. Consequently, even though modified navigation map data actually affects only a portion of a map, the full map data is updated because partial updates are not possible. In this paper, a navigation system is studied to solve this difficult partial map update problem. The map air update navigation system, which is the result of this study, provides real‐time partial map updating using wireless communications. 相似文献
19.