基于Android的无线GPS定位系统设计

发布时间：2018-01-04 22:28

本文关键词：基于Android的无线GPS定位系统设计　出处：《东南大学》2016年硕士论文　论文类型：学位论文

【摘要】：在我国城镇化、工业化高速发展的阶段,土地利用方式全面调整,土地使用权限变更频繁。为了及时准确掌握土地利用情况,需要一种高效的土地实地核查技术作为这一进程的重要保障。随着GPS技术在大地测绘领域的推广,越来越多的基于Windows Mobile系统的GPS手持机被应用于大地测绘、土地核查等工作中,但是这些GPS手持机在系统功能、定位精度等方面急需改善以满足日益改变的需要。在智能手机迅速普及的4G时代,Android以其更为优越的系统功能和性能,迅速成为最主流的移动操作系统平台之一。因此,设计一款基于Android平台的GPS定位系统具有很大的现实意义。本文根据土地核查领域对GPS的应用需求设计了一种基于Android的无线GPS定位系统。首先阐述了基于Android系统的GPS驱动移植,主要完成了Android系统下GPS的JNI、HAL和Linux内核驱动的移植；然后完成了解析GPS定位数据的程序设计,实现了单点定位功能；其次将基于VRS技术的CORS系统与RTK技术结合,根据Ntrip协议实现了GPS实时差分定位功能；最后本文完成静态已知点的检测和基线相对长度检测来对单点定位和差分定位的精度进行测试,通过对测试数据的处理与分析,表明本系统单点定位的误差峰值为+1.434m,精度达到米级(1m-10m), CORS网络差分定位在经度方向上的误差跳跃不超过9cm,纬度方向上的误差跳跃不超过6cm,精度达到厘米级(1cm-10cm),达到了预定的功能要求和性能指标。本文设计的基于Android的无线GPS定位系统能够应用于土地地理信息实地核查领域,可以大大提高土地核查工作中地理信息数据采集工作的效率,并且能够保证采集到的地理数据的精度,从而能够为土地监管提供强有力的数据支撑,有助于提高土地资源利用率,具有一定的工程应用价值。
[Abstract]:In the stage of rapid development of urbanization and industrialization in China, the land use mode is adjusted comprehensively and the land use authority is changed frequently. In order to grasp the land use situation accurately and timely. An efficient land field verification technology is needed as an important guarantee of this process. With the popularization of GPS technology in the field of geodetic mapping. More and more GPS handsets based on Windows Mobile system are used in geodetic mapping, land verification and so on, but these GPS handsets function in the system. Positioning accuracy and other aspects need to be improved to meet the ever-changing needs. In the 4G era of the rapid spread of smartphones Android has more superior system functions and performance. Rapidly becoming one of the most popular mobile operating system platforms. It is of great practical significance to design a GPS positioning system based on Android platform. According to the application requirements of GPS in the field of land verification, a wireless G based on Android is designed in this paper. PS positioning system. Firstly, the GPS driver transplantation based on Android system is introduced. The transplanting of JNIHAL and Linux kernel driver of GPS in Android system is completed. Then the program design of analyzing GPS positioning data is completed, and the function of single point positioning is realized. Secondly, the CORS system based on VRS technology is combined with RTK technology, and the real-time differential location function of GPS is realized according to Ntrip protocol. Finally, this paper completes the static known point detection and baseline relative length detection to test the accuracy of single point positioning and differential positioning, through the processing and analysis of test data. The results show that the error peak value of single point positioning is 1.434m, the precision is 1m-10mg, and the error jump of CORS network differential positioning in longitude direction is not more than 9cm. The error jump in the latitude direction does not exceed 6 cm, and the precision reaches 1 cm ~ 10 cm in centimeter order). The wireless GPS positioning system based on Android can be applied to the field verification of land geographic information. It can greatly improve the efficiency of geographic information data collection in the land verification work, and can ensure the accuracy of the collected geographic data, thus providing a strong data support for land supervision. It is helpful to improve the utilization rate of land resources and has certain engineering application value.
【学位授予单位】：东南大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：P228.4;TP316

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