基于 Zi gB ee的图书检索导航系统研究

摘要

The-traditional-book-lending-form-brings-much-inconvenience-.In-order-to-solve-this-problem-,this-paper-proposes-a-method-of-using-internet-of-things-technology-to-build-a-library-retrieval-navigation-system-.A-ZigBee-wireless-localization-network-is-built-by-wireless-localization-nodes-and-handheld-terminal-.The-wireless-localization-nodes-as-reference-nodes-are-placed-in-the-library-,the-handheld-terminal-which-has-internal-ZigBee-localization-module-is-used-as-a-blind-node-.In-the-wireless-network-,the-position-of-readers-can-be-gotten-by-calculating-the-localization-coordinates-of-blind-nodes-.-According-to-the-system-requirements-,-the-various-modules-of-the-system-from-hardware-and-software-aspects-are-designed-.And-an-improved-weighted-centroid-localization(WCL-)-algorithm-is-proposed-,-and-the-algorithm-is-used-to-locate-handheld-terminal-.-The-simulation-experiment-on-improved-weighted-centroid-localization-algorithm-is-done-by-Matlab-,and-the-result-shows-that-the-localization-accuracy-of-improved-weighted-centroid-localization-algorithm-is-higher-than-that-of-the-centroid-localization-algorithm-and-PDR-WCL-algorithm-,and-the-localization-error-is-less-than-1-meter-.%为了解决传统图书借阅形式带来的诸多不便，运用ZigBee技术构建了图书检索导航系统。将图书馆内放置无线定位节点作为参考节点，内置有ZigBee定位模块的手持终端作为盲节点，来构建一个ZigBee无线定位网络，在定位网络中计算出的盲节点坐标即为读者的位置。根据系统需求，从硬件和软件两方面设计了系统的各个模块，提出了一种改进的加权质心算法，用于手持终端的定位。通过M atlab对改进的加权质心算法进行了仿真实验，结果表明：改进的加权质心算法比质心算法、PDR-WCL算法精度更高，定位误差在1m以内。