センサ・ネットワーク用弾性表面波希薄ガス・センサの研究(第1報)

概要

論文の詳細を見る
Mobile communications, e.g. cellular phones, have become very widespread. A new concept called "Sensor Network" has been proposed with the development of such communication systems. Sensed signals from many sensor nodes arranged in a wide area are gathered to a center node by technology similar to that used in mobile communications. Home/office circumstance control, environment monitoring and protection, etc can be conducted based on the collected data. We propose a new SAW (Surface Acoustic Wave) subtle-gas sensor, which can be used in these sensor nodes. The new sensor structure removes a limited selection for piezoelectric crystal substrates, while only Quartz crystal substrates have been used in conventional SAW gas sensors. The sensing dynamic range was widely extended by utilizing both fundamental and 3^<rd>-harmonic frequency SAWs. Moreover, our sensors are also designed to be combed with 2.4-GHz ZigBee, which has been regulated by IEEE802.15.4, and ZigBee Alliance as a wireless-communications medium for the "Sensor Network". It is predicted that our network system will possibly provide hydrogen-gas leakage sensing for future fuel-cell cars and environmental-pollution gas sensing.
工学院大学の論文