An Indoor Ultrasonic Positioning System Based on TOA for Internet of Things
An Indoor Ultrasonic Positioning System Based on TOA for Internet of Things
复制标题
基于TOA的物联网室内超声波定位系统
DOI：
10.1155/2016/4502867
复制
发表时间：
2016-01-01
影响因子：
--
通讯作者：
Sun, Guiqing
中科院分区：
文献类型：
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作者：
Li, Jian;Han, Guangjie;Sun, Guiqing
随着物联网的发展，室内物体的位置信息在大多数应用场景中变得越来越重要。本文提出了一种超声波室内定位系统，可以对室内运动物体实现厘米级的精确定位。整个系统需要由发送节点、接收节点和显示控制终端组成。该系统基于长基线定位技术，采用码分复用接入机制。系统工作在up-transmit-down-receive模式下，接收节点数量没有限制。基于超声到达时间测距技术对接收节点进行定位。要准确定位，至少要有4到5个发射节点。当高度大于3米时，工作半径不小于5米。该系统利用宽带伪随机噪声信号Gold序列进行多用户识别和倾斜距离测量。本文首先简要介绍了目前流行的室内超声定位方法，然后阐述了所提出算法的原理，并给出了仿真结果。为了检验该方法的正确性和实用性，文中还给出了实际实现和实验结果。
With the development of Internet of Things, the position information of indoor objects becomes more important for most application scenarios. This paper presents an ultrasonic indoor positioning system, which can achieve centimeter-level precise positioning of objects moving indoors. Transmitting nodes, receiving nodes, and display control terminal are needed to constitute the entire system. The system is based on long-baseline positioning technology that uses code division multiplexing access mechanism. There is no limit to the number of receiving nodes as the system works in the up-transmit-down-receive mode. Positioning of a receiving node is found based on ultrasonic Time of Arrival ranging technology. To accurately determine the positioning, there must be at least four or five transmitting nodes. The working radius will not be less than 5 meters when the height is larger than 3 meters. The system uses wideband pseudorandom noise signal called Gold sequences for multiuser identification and slant range measurement. The paper first gives a brief introduction of popular indoor ultrasonic positioning methods and then describes the theory of proposed algorithm and provides the simulation results. To examine the correctness of the approach and its practicality, the practical implementation and experimental results are provided also in the paper.