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首页> 美国卫生研究院文献>Sensors (Basel Switzerland) >LOCATE-US: Indoor Positioning for Mobile Devices Using Encoded Ultrasonic Signals Inertial Sensors and Graph-Matching
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LOCATE-US: Indoor Positioning for Mobile Devices Using Encoded Ultrasonic Signals Inertial Sensors and Graph-Matching

机译：定位 - 美国：使用编码超声信号的移动设备的室内定位惯性传感器和图形匹配

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Indoor positioning remains a challenge and, despite much research and development carried out in the last decade, there is still no standard as with the Global Navigation Satellite Systems (GNSS) outdoors. This paper presents an indoor positioning system called LOCATE-US with adjustable granularity for use with commercial mobile devices, such as smartphones or tablets. LOCATE-US is privacy-oriented and allows every device to compute its own position by fusing ultrasonic, inertial sensor measurements and map information. Ultrasonic Local Positioning Systems (U-LPS) based on encoded signals are placed in critical zones that require an accuracy below a few decimeters to correct the accumulated drift errors of the inertial measurements. These systems are well suited to work at room level as walls confine acoustic waves inside. To avoid audible artifacts, the U-LPS emission is set at 41.67 kHz, and an ultrasonic acquisition module with reduced dimensions is attached to the mobile device through the USB port to capture signals. Processing in the mobile device involves an improved Time Differences of Arrival (TDOA) estimation that is fused with the measurements from an external inertial sensor to obtain real-time location and trajectory display at a 10 Hz rate. Graph-matching has also been included, considering available prior knowledge about the navigation scenario. This kind of device is an adequate platform for Location-Based Services (LBS), enabling applications such as augmented reality, guiding applications, or people monitoring and assistance. The system architecture can easily incorporate new sensors in the future, such as UWB, RFiD or others.
机译：室内定位仍然是一个挑战，尽管在过去十年中进行了很多研发，但仍然没有标准与户外全球导航卫星系统（GNSS）的标准。本文介绍了一个名为Locate-US的室内定位系统，可调节粒度，用于商业移动设备，如智能手机或平板电脑。 Locate-Us是隐私面向的，并允许每个设备通过熔化超声波，惯性传感器测量和地图信息来计算其自己的位置。基于编码信号的超声局部定位系统（U-LPS）放置在需要低于几个小折数以下的临界区域，以校正惯性测量的累积漂移误差。随着墙壁限制在内部的墙上，这些系统非常适合在房间水平工作。为避免声音伪影，U-LPS发射设置为41.67 kHz，并且通过USB端口将具有减小尺寸的超声波采集模块通过USB端口捕获信号。移动设备中的处理涉及到与来自外部惯性传感器的测量融合的到达（TDOA）估计的改进的时间差，以获得10 Hz速率的实时位置和轨迹显示。也包括图形匹配，考虑到有关导航方案的现有知识。这种设备是基于位置的服务（LBS）的适当平台，使得诸如增强现实，指导应用程序或人们监控和帮助等应用程序。系统架构可以在将来轻松地结合新的传感器，例如UWB，RFID或其他。

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