中圖分類號：TN98 文獻標志碼：A DOI: 10.16157/j.issn.0258-7998.223516 中文引用格式： 張毅，趙培軍，袁玲，等. 基于BLE Mesh的資產定位系統(tǒng)設計[J]. 電子技術應用，2023，49(7)：72-76. 英文引用格式： Zhang Yi，Zhao Peijun，Yuan Ling，et al. Design of assets positioning system based on BLE mesh[J]. Application of Electronic Technique，2023，49(7)：72-76.
Design of assets positioning system based on BLE mesh
Zhang Yi，Zhao Peijun，Yuan Ling，Wang Haoyu，Li Jing
(School of Communication and Information Engineering， Chongqing University of Posts and Telecommunications， Chongqing 400065， China)
Abstract： It is difficult to effectively balance the positioning accuracy, construction cost, and deployment flexibility of the current asset positioning system. To address this challenge,this paper designs an asset positioning system based on bluetooth low energy (BLE) mesh using multidimensional scaling-map (MDS-MAP) positioning algorithm. Firstly, the original received signal strength indicator (RSSI) value is filtered by Gauss-Kalman fusion to improve its accuracy. Then, time to live (TTL) is used to restrict the relay nodes, which improves the data transmission efficiency. Finally, in order to reduce the ranging error, the range matrix is modified by using the radius compensation method and the Bellman-Ford fusion iteration scheme. The experimental results show that the designed system can effectively update the bluetooth tag information and display the location, and the average positioning accuracy reaches 0.94 m. This system has the advantages of low cost and convenient engineering implementation, and has certain application value and development prospect.
Key words : bluetooth low energy （BLE） mesh；received signal strength indicator （RSSI）；Gauss-Kalman fusion filtering；TTL constraint；Bellman-Ford algorithm；asset positioning system
本文在此基礎上提出了一種基于BLE Mesh的資產定位新方案，設計了應用于資產管理的米級自組網定位系統(tǒng)。該系統(tǒng)利用鄰居節(jié)點間的RSSI值并采用MDS-MDP定位算法實現(xiàn)對資產的定位，相對于當前只能達到“房間級”的方案定位精度更高。雖然其精度沒有到達角度(Angle of Arrival, AOA)方案的高，但其具有成本更低、施工方便、靈活性更好的工程應用優(yōu)勢。
