| Summary: | 碩士 === 國立清華大學 === 電機工程學系 === 96 === Wireless sensor networks are being considered in a wide range of applications, from environmental monitoring and industrial monitoring to health care management and home use. Different sensing devices and sensor platforms have been developed to date. One of the most important design problems is how to design an interface for a wireless sensor platform. The interface between the microcontroller and the sensing devices directly affect the performance, power usage, and data accuracy of a sensor platform.
In this thesis, we categorize the sensing devices and propose a methodology for systematic selection of the interface for cross-layer optimization. Sensing devices are categorized based on their output type, including analog, digital, capacitive, and high-level protocol types. We derive formulas for evaluation and estimation of sensor platforms implemented with alternative choices of interfaces. We demonstrate this methodology with case studies of a real-world sensing platform by comparing analog and digital alternatives of sensing devices. We also use digital signal post-processing as a case study for evaluating the accuracy and high sampling rate as required by the application.
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