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17 May 2005 Prototype of sensor network with embedded local data processing
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In this paper, we design a sensor network system with a host computer and a sensor terminal, which has local data processing by using off-the-shelf hardware. If all data, which are obtained by many sensors, are transmitted to the host computer and data processing is centralized at the host computer, the task of the host computer becomes large. Therefore, we consider that tasks of the host computer are decreased by making each sensor unit to share data processing locally and transmit results to the host computer. The sensor terminal consists of an accelerometer, an analog-to-digital (A/D) converter and the T-Engine (M32104) has capacity of data acquisition, processing and transmission in real time. We use the wavelet transform as an algorithm of data processing. The host computer can receive the result of the wavelet transform by sending the request to the sensor terminal. However, The host computer and the sensor terminal are connected by LAN cables. Next version of the prototype has wireless LAN. We demonstrate the performance of the sensor network system by applying this system to a structural model and make the sensor terminal execute locally the wavelet transform.
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Y. Hashimoto, A. Masuda, and A. Sone "Prototype of sensor network with embedded local data processing", Proc. SPIE 5765, Smart Structures and Materials 2005: Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems, (17 May 2005);

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