| GNSS/地磁组合的室内外无缝定位平滑过渡方法 |
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| 引用本文： | 蔡劲,蔡成林,张首刚,蒙萍.GNSS/地磁组合的室内外无缝定位平滑过渡方法[J].测绘通报,2018,0(2):30-34. |
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| 作者姓名： | 蔡劲 蔡成林 张首刚 蒙萍 |
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| 作者单位： | 桂林电子科技大学信息与通信学院, 广西 桂林 541004 |
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| 基金项目： | 国家自然科学基金，广西重点研发计划项目，广西精密导航技术与应用重点实验室基金，桂林电子科技大学研究生教育创新计划 |
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| 摘 要： | 针对室内外无缝定位在室内外过渡点精度低、不能平滑自动切换等问题，结合GNSS定位技术以及室内地磁指纹节点的组合方法来实现室内外无缝定位及导航。由于从室外至室内时接收机接收到的卫星星数减少、GDOP值逐渐增加、定位的误差增大，因此室内地磁定位精度逐渐优于GNSS定位精度，在两个定位精度临界点通过分析计算得出GDOP最优转化范围值，进行平稳切换。此次试验仿真结果表明，GDOP在3~3.5进行切换与单一GNSS或地磁方法定位的精度相比，分别提高85.7%和82.6%，从而达到了室内外的高精度无缝定位，填补了国内外在室内外无缝定位上没有合适的切换界定的空白。
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| 关 键 词： | GNSS 地磁 GDOP 无缝定位 平稳过渡 |
| 收稿时间： | 2017-09-11 |
A Smooth Transition Method for Indoor and Outdoor Seamless Positioning of GNSS/Magnetic Combination |
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| CAI Jin,CAI Chenglin,ZHANG Shougang,MENG Ping.A Smooth Transition Method for Indoor and Outdoor Seamless Positioning of GNSS/Magnetic Combination[J].Bulletin of Surveying and Mapping,2018,0(2):30-34. |
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| Authors: | CAI Jin CAI Chenglin ZHANG Shougang MENG Ping |
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| Institution: | College of Information and Communication, Guilin University of Electronic Technology, Guilin 541004, China |
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| Abstract: | In view of the problem that indoor and outdoor seamless positioning at the transition point has low precision and cannot switch smoothly and automatically,this paper combined GNSS(Global Navigation Satellite System) positioning technology and indoor geomagnetic fingerprint nodes to achieve indoor and outdoor seamless positioning and navigation. Due to the decreasing number of the satellites that receivers can search and the increasing GDOP(Geometric Dilution of Precision) value and positioning error from outdoor into indoor,the precision of indoor geomagnetic positioning is better than that of GNSS positioning gradually and can be switched stably by analyzing and calculating the GDOP optimal range value at the two critical positioning points. The simulation results of this experiment show that the positioning precision increased by 85.7％ and 82.6％ compared with single GNSS positioning or geomagnetic positioning methods, thus realized to achieve the seamless indoor-outdoor positioning with high precision, and filled blanks in the definition of indoor-outdoor seamless positioning switching both at home and abroad. |
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| Keywords: | GNSS geomagnetism GDOP seamless positioning smooth transition |
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