基于wifi的定位技术应用研究
发布时间：2018-07-23 18:47
【摘要】：基于WIFI的定位技术，，可以很好地解决GPS只能进行室外定位的问题，是定位领域的新兴技术。随着近年来室内定位技术的迅猛发展，在医疗行业、公安行业以及旅游行业都得到了广泛的应用。 论文围绕室内定位技术、室内定位算法、室内定位纠偏算法以及室内外定位无缝切换技术进行展开。首先罗列出目前主流的室内定位技术，比较这些技术的特点，最终选择基于WIFI的定位技术进行室内定位。然后在室内定位算法选择阶段，从定位精准度、速度、优缺点以及适用场景等各方面分析三角形算法、指纹库算法和场景分析定位算法，最终使用三角形算法作为文本的主要算法。考虑到RSSI值的时变性，讨论高斯滤波、贝叶斯滤波和卡尔曼滤波在数据采集阶段对RSSI值的滤波方式。根据RANSAC算法的思想，提出了一种从距离和方向两个维度分别进行纠偏的二次纠偏算法，提高了定位精度。最后，为了扩充应用的适用范围，通过控制GPS定位模块和WIFI定位模块的开启和关闭状态，提出了一种将两种定位技术相融合的室内外无缝切换策略，从而大幅的提高定位设备的使用寿命。 在以上工作的基础上，设计了一个基于WIFI的室内定位软件。其中分析了软件的整体结构，利用三角形算法和二次纠偏算法，并结合室内外定位无缝切换策略，最后实现了室内定位软件。
[Abstract]:Positioning technology based on WIFI, which can solve the problem that GPS can only carry out outdoor positioning, is a new technology in the field of positioning. With the rapid development of indoor positioning technology in recent years, it has been widely used in medical industry, public security industry and tourism industry. The thesis focuses on indoor positioning technology, indoor positioning algorithm, indoor positioning correction algorithm and indoor and outdoor positioning seamless switching technology. Firstly, the main indoor positioning technology is listed, and the characteristics of these technologies are compared. Finally, the indoor positioning technology based on WIFI is selected. Then in the selection stage of indoor positioning algorithm, the triangle algorithm, fingerprint database algorithm and scene analysis location algorithm are analyzed from the aspects of location accuracy, speed, advantages and disadvantages, and applicable scenes. Finally, triangle algorithm is used as the main algorithm of text. Considering the time-varying of RSSI value, the filtering methods of Gao Si filter, Bayesian filter and Kalman filter to RSSI value in data acquisition stage are discussed. According to the idea of RANSAC algorithm, a quadratic correction algorithm is proposed, which corrects the deviation from the two dimensions of distance and direction, and improves the positioning accuracy. Finally, in order to expand the application scope, by controlling the opening and closing state of GPS positioning module and WIFI positioning module, an indoor and outdoor seamless switching strategy is proposed, which combines the two positioning technologies. Thus greatly improve the service life of positioning equipment. Based on the above work, an indoor positioning software based on WIFI is designed. The whole structure of the software is analyzed, and the indoor positioning software is realized by using triangle algorithm and quadratic correction algorithm, combined with the seamless switching strategy of indoor and outdoor positioning.
【学位授予单位】：沈阳工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN92
本文编号：2140322
[Abstract]:Positioning technology based on WIFI, which can solve the problem that GPS can only carry out outdoor positioning, is a new technology in the field of positioning. With the rapid development of indoor positioning technology in recent years, it has been widely used in medical industry, public security industry and tourism industry. The thesis focuses on indoor positioning technology, indoor positioning algorithm, indoor positioning correction algorithm and indoor and outdoor positioning seamless switching technology. Firstly, the main indoor positioning technology is listed, and the characteristics of these technologies are compared. Finally, the indoor positioning technology based on WIFI is selected. Then in the selection stage of indoor positioning algorithm, the triangle algorithm, fingerprint database algorithm and scene analysis location algorithm are analyzed from the aspects of location accuracy, speed, advantages and disadvantages, and applicable scenes. Finally, triangle algorithm is used as the main algorithm of text. Considering the time-varying of RSSI value, the filtering methods of Gao Si filter, Bayesian filter and Kalman filter to RSSI value in data acquisition stage are discussed. According to the idea of RANSAC algorithm, a quadratic correction algorithm is proposed, which corrects the deviation from the two dimensions of distance and direction, and improves the positioning accuracy. Finally, in order to expand the application scope, by controlling the opening and closing state of GPS positioning module and WIFI positioning module, an indoor and outdoor seamless switching strategy is proposed, which combines the two positioning technologies. Thus greatly improve the service life of positioning equipment. Based on the above work, an indoor positioning software based on WIFI is designed. The whole structure of the software is analyzed, and the indoor positioning software is realized by using triangle algorithm and quadratic correction algorithm, combined with the seamless switching strategy of indoor and outdoor positioning.
【学位授予单位】：沈阳工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN92
【参考文献】
相关期刊论文 前10条
1 张瑞峰;张忠娟;吕辰刚;;基于质心-Taylor的UWB室内定位算法研究[J];重庆邮电大学学报(自然科学版);2011年06期
2 邬春明;耿强;刘杰;范睿;;DGPS与UWB混合精确无缝定位技术研究[J];传感器与微系统;2012年03期
3 徐玉滨;邓志安;马琳;;基于核直接判别分析和支持向量回归的WLAN室内定位算法[J];电子与信息学报;2011年04期
4 马燕;袁蔚林;陈秀万;许玉斌;孙华波;;基于WiFi与GPS组合定位算法的无缝定位方法研究[J];地理与地理信息科学;2013年03期
5 陈国平;马耀辉;张百珂;;基于指纹技术的蓝牙室内定位系统[J];电子技术应用;2013年03期
6 陆霞;;WiFi定位技术——基于质心定位的三边定位算法的研究[J];电脑知识与技术;2013年25期
7 赵锐;钟榜;朱祖礼;马乐;姚金飞;;室内定位技术及应用综述[J];电子科技;2014年03期
8 沈冬冬;李晓伟;宋旭文;贺志楠;;基于多层神经网络的超宽带室内精确定位算法[J];电子科技;2014年05期
9 田辉;夏林元;莫志明;彭军还;;基于无线局域网信号的城区室内外无缝定位技术[J];桂林理工大学学报;2013年02期
10 唐文胜;李姗;匡旺秋;;RF室内定位指纹库空间相关生成算法[J];计算机工程与应用;2008年23期
本文编号：2140322
本文链接：https://www.wllwen.com/kejilunwen/wltx/2140322.html
