| Summary: | 碩士 === 國立中央大學 === 資訊管理研究所 === 96 === The application issue of wireless sensor network in various areas had been widely discussed. With the development of concepts and technologies of mobile sensor, the issues of mobile sensor network are also arising. The mobility feature of mobile sensors makes the sensing area of wireless sensing network can be adjusted dynamically. Hence, mobile sensor network can be used in detection operations of abnormal environments such as conflagration or oil spill areas. Traditional wireless sensor networks detect environment by the way of random deployment. Due to the higher cost of mobile sensors, it is inappropriate to use mobile sensors by the same way.
The aim of this study is to design an application model for small mobile sensor network to discover unknown target areas in the environment. To detect the targets efficiently, the mobile sensors should be formatted to a network and operate as a group based on a systematic sensing mechanism. With this concept, this study is composed with two parts － mobile sensor network structure and sensing mechanism. In the part of mobile sensor network structure, we firstly propose a basic network model called SensorGroup. To reduce the requirement for the localization ability of mobile sensor and also the construction cost of network, an advanced structure called Centrlized SensorGroup is proposed by combining a wireless localization mechanism with SensorGroup. In the part of sensing mechanism, we firstly propose S-shaped sensing mechanism. In this basic mechanism SensorGroup senses the target area with a regular S-shaped movement. To improve the efficiency of sensing operation, we then propose an incremental clustering aided sensing mechanism. In this advanced mechanism, SensorGroup can adjust its movement dynamically based on the cluster analysis of sensing record of target area to achieve higher sensing efficiency.
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