SpiderBat: Augmenting wireless sensor networks with distance and angle information
SpiderBat: Augmenting wireless sensor networks with distance and angle information
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SpiderBat：利用距离和角度信息增强无线传感器网络
DOI：
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发表时间：
2011
期刊：
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通讯作者：
Roger Wattenhofer
中科院分区：
文献类型：
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作者：
Georg Oberholzer;P. Sommer;Roger Wattenhofer
获得准确的位置信息是许多无线传感器网络应用的关键要求。我们提出的设计，实施和评估的SpiderBat，一个基于超声波的测距平台，旨在增强现有的传感器节点的距离和角度信息。SpiderBat具有独立可控的超声波发射器和接收器，在指南针的所有方向。使用数字指南针，节点可以了解它们的方向，并将此信息与使用超声波的距离和角度测量相结合。据我们所知，SpiderBat是第一个基于超声波的传感器节点平台，可以精确测量传感器节点之间的绝对角度。角度信息的可用性使我们能够以几厘米的精度估计节点位置。此外，我们的系统允许在多跳网络中定位节点，其中纯基于距离的算法必须失败，特别是在稀疏网络中，只有一个单一的锚节点。此外，关于绝对节点取向的信息使得可以检测两个节点是否在视线内。因此，我们可以通过查看接收到的超声信号中的图案来检测障碍物和墙壁的存在。
Having access to accurate position information is a key requirement for many wireless sensor network applications. We present the design, implementation and evaluation of SpiderBat, an ultrasound-based ranging platform designed to augment existing sensor nodes with distance and angle information. SpiderBat features independently controllable ultrasound transmitters and receivers, in all directions of the compass. Using a digital compass, nodes can learn about their orientation, and combine this information with distance and angle measurements using ultrasound. To the best of our knowledge, SpiderBat is the first ultrasound-based sensor node platform that can measure absolute angles between sensor nodes accurately. The availability of angle information enables us to estimate node positions with a precision in the order of a few centimeters. Moreover, our system allows to position nodes in multi-hop networks where pure distance-based algorithms must fail, in particular in sparse networks, with only a single anchor node. Furthermore, information on absolute node orientations makes it possible to detect whether two nodes are in line-of-sight. Consequently, we can detect the presence of obstacles and walls by looking at patterns in the received ultrasound signal.