基于UWB技術(shù)的室內(nèi)精確導航研究與實現(xiàn)
[Abstract]:With the increasing demand of LBS (location-based services), the research on navigation and location of moving objects in complex indoor environment has become a hot research topic in the field of Internet of things, geographic information and computer science. Real-time and accurate positioning and navigation system also has a wide range of applications in medical, security, logistics, automatic control, intelligent monitoring and other fields, so the application of navigation technology based on wireless network has a broad development prospects. The current outdoor navigation and positioning technology (such as GPS technology) is used in indoor environment, there are some problems such as serious shortage of indoor positioning accuracy and serious attenuation of signal caused by GPS signal penetrating the wall, so it is not suitable for indoor accurate navigation. Some indoor navigation technologies such as WSN (Wireless Sensor Network) navigation, RFID (radio frequency identification (, RFID () navigation are relatively difficult to model the grid map of indoor environment because of their slow speed and low precision. Therefore, these indoor navigation systems and the corresponding navigation algorithms can not meet the indoor high accuracy, high real-time requirements. Aiming at the problems existing in the existing navigation system, the main work of this paper is as follows: (1) according to the characteristics of UWB (Ultra-Wideband) ultra-wideband technology, Combined with TOA and TDOA localization algorithms, an improved and optimized localization algorithm is proposed to correct the positioning accuracy of UWB navigation. At the same time, the methods and models of navigation accuracy correction for three UWB sensors and more than four UWB sensors are studied and discussed. (2) by redesigning the BEST-FIRST A * algorithm and IDA* iterative search algorithm, SMA* algorithm is proposed. With the introduction of linear fitting technology, these algorithms are improved so that they can generate optimal navigation routes, which make the navigation routes generated in indoor area navigation shorter, more accurate and faster. It can basically meet the needs of the practical application of UWB technology environment. (3) based on the Ubisense7000 hardware equipment, a high precision and fast navigation system suitable for UWB technology is designed and implemented by using the optimized positioning algorithm and the improved algorithm of A *. The grid map of navigation area and the visualization of accurate indoor navigation are realized in the known indoor environment. (4) in the real scene and simulated scene, The reliability and real time of navigation system are ensured by testing the navigation environment and the function module of accurate navigation system.
【學位授予單位】:東華理工大學
【學位級別】:碩士
【學位授予年份】:2014
【分類號】:TN925
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