A Novel Broadband Ultrasonic Location System
A Novel Broadband Ultrasonic Location System
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DOI：
10.1007/3-540-45809-3_21
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发表时间：
2002-09
期刊：
影响因子：
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通讯作者：
M. Hazas;Andy Ward
中科院分区：
文献类型：
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作者：
M. Hazas;Andy Ward
室内超声波定位系统为无处不在的计算应用程序提供细粒度的位置数据。然而，先前开发的超声波定位系统利用窄带换能器，因此在存在噪声的情况下表现不佳，并且受到必须避免信号冲突这一事实的限制。在本文中，我们提出了一种利用宽带换能器的新型超声波定位系统。我们描述了发射器和接收器硬件，并表征了超声波通道带宽。该系统已部署为办公室中的轮询集中定位系统。测试结果表明，该系统可以在高水平的环境噪声中运行，并且具有比以前的超声波定位系统更高的更新率。
Indoor ultrasonic location systems provide fine-grained position data to ubiquitous computing applications. However, the ultrasonic location systems previously developed utilize narrowband transducers, and thus perform poorly in the presence of noise and are constrained by the fact that signal collisions must be avoided. In this paper, we present a novel ultrasonic location system which utilizes broadband transducers. We describe the transmitter and receiver hardware, and characterize the ultrasonic channel bandwidth. The system has been deployed as a polled, centralized location system in an office. Test results demonstrate that the system can function in high levels of environmental noise, and that it has the capability for higher update rates than previous ultrasonic location systems.