| Summary: | 碩士 === 國立臺北科技大學 === 自動化科技研究所 === 95 === This thesis proposes a data acquisition system based on the novel wireless sensor network technology. The proposed system reforms the HEED technology and uses the developed algorithm for transferring sensor data to a sink. TinyOS is used to implement the proposed system since it is designed for wireless sensor network applications. There are several examples provided in TinyOS package which explain the usage of the system. In the proposed system, these applications are integrated and improved to form a complete application. First, an application provided in TinyOS which demonstrates the command transmitting to the nodes within the radio range of the sink is extended. The application is modified such that the command can be received by all nodes in the system. Secondly, the sensor data is transmitted to the sink node using proposed technique. Thirdly, every node in the proposed system utilizes a Cluster-Table to keep track of known sensor nodes. This mechanism will reduce the cost of transmission while maintain the reachibility of the command to every node. Finally, a GUI application is developed so that commands can be sent easily. Since the software structure of the proposed system is easy to expand and maintain, it can significantly reduce the effort required for future integration and development.
Simulation results show that the developed system is capable of transmitting data through proposed mechanism while the command can be transmitted to the nodes using Cluster-Table which is proposed in this paper. The system is actually implemented on Micaz-like platform. The experimental results show that under some circumstances the data packet may lose due to packet collision. However, the system is capable of transmitting sensor data correctly in most cases.
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