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基于PANI/Au/Al2O3的丙酮气体传感器选择性及感测机理研究 被引量:1
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作者 刘文龙 晏宸然 +2 位作者 周衡刚 吴孟强 杜景顺 《电子元件与材料》 CAS CSCD 北大核心 2019年第11期21-24,36,共5页
以PANI为敏感材料,采用电聚合法制备PANI/Au/Al2O3电极,组装成感测系统,并以干燥的N2为背景气体,对23~1189ppm浓度范围的丙酮气体进行感测.分别添加O2、CO2、NH3、水蒸气作为干扰气体进行选择性实验.结果表明,当以O2或CO2作为干扰气体时... 以PANI为敏感材料,采用电聚合法制备PANI/Au/Al2O3电极,组装成感测系统,并以干燥的N2为背景气体,对23~1189ppm浓度范围的丙酮气体进行感测.分别添加O2、CO2、NH3、水蒸气作为干扰气体进行选择性实验.结果表明,当以O2或CO2作为干扰气体时,该气体传感器的灵敏度均有所降低,但混合气体中丙酮的浓度与感测电极的电阻变化率仍具有良好的线性关系;当加入水蒸气(30%RH)或4ppm氨气时,该丙酮气体传感器的电阻变化率分别稳定在5%和4%左右基本不变,不随丙酮气体浓度的改变而改变,说明该传感器受水分和氨气的干扰非常大.最后分别对PANI与丙酮、CO2、NH3、水蒸气进行反应的机理进行了分析. 展开更多
关键词 气体传 丙酮 食品 感测机理 选择性
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Development of PC Worker’s Management System in PC Training Room and Office by Using IoT Technology
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作者 Keiichi Abe Yuki Takabayashi Masao Isshiki 《Journal of Electrical Engineering》 2018年第4期221-228,共8页
At present time, there has been a demand for management systems that can survey and monitor a PC (personal computer) practice room, movement of people in an office, situation of utilization of facilities and so on i... At present time, there has been a demand for management systems that can survey and monitor a PC (personal computer) practice room, movement of people in an office, situation of utilization of facilities and so on in real time without causing psychological stress. For example, PC administrators in Japanese national educational institutions must report operation status of PC practice rooms once a year. But, there is currently no system for automatically recording PC operating situations. Therefore, the burden on the PC administrators is big. In this study, we aimed at systems for accurately managing the sitting and work time without psychologically stressing PC users. This time, we propose uniform management systems of sitting and work time using smart tap node and mat sensor node by IoT (Internet of Things) technology. The smart tap was connected to PCs to acquire the operating status of the PCs. In parallel with this smart tap, the mat sensor was used to acquire human presence state. By calculating binary data representing the PC operating status and human presence state from the two sensing data (smart tap and mat sensor) by the proposed technique, we can exactly calculate wasteful power consumption etc. The use of IoT technology makes it unnecessary to use large installation services when introducing our system. Therefore, this our proposal system can be easily installed even by unskilled workers. 展开更多
关键词 PC worker’s management system smart tap node mat sensor node IoT technology sensor network.
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