於供水水管系統自動安裝感測器

Abstract

這篇論文研究要如何在水管中自動地佈建無線感測網路系統。這系統會需要(1)定位出隱藏在牆後的水管分布以及定位出感測器在水管中位置的能力。(2)感測器能附著在管壁上的能力。論文也將重點放在這兩項上面。 透過分析感測器在水管中流動時所收到的資料，能定位出各個水管的位置以及方向，同時能達到定位感測器在水管中的位置。而欲使感測器能於抵達監測點時停住，則需在各個感測器上安裝機械式可伸縮手臂。

This thesis presents an autonomous deployment system for mobile sensors in pipeline monitoring. To enable automatic deployment of mobile sensors in pipes, the system performs two functions: (1) the system first maps the 3D layout of hidden water pipe-lines, thus enables localization of any mobile sensor traveling and flowing in pipes; (2) when a mobile node reaches a target destination location, the node contains a mechani-cal latching mechanism to attach itself to the pipe’s inner surface to complete the node deployment process. For the layout mapping and localization function, the system provides a non-destructive way to reveal the spatial topology of hidden water pipelines behind walls and track the location of mobile node. The mobile sensor enters the water pipeline from inlet. As the sensor node traverses the pipelines with the water flow, it gathers pressure, angular velocity and acceleration readings. Through spatio-temporal analysis of these sensor readings, the system can determine the layout of the pipeline and sensor location. For the node’s latching and de-latching mechanism, the system enables automated placement and replacement of sensor nodes inside the pipes with minimal human effort.