| Summary: | 碩士 === 國立臺灣大學 === 電子工程學研究所 === 105 === With the advancement of Internet technology, the life styles of human have been greatly changed. The Internet of Things (IoT), can be described as connecting physical objects with embedded sensors to the Internet, and thus enabling the new forms of communication between things and people, or among things themselves. There are many domains in which the IoT can play a remarkable role and improve the quality of our lives.
In this research, we successfully apply the Internet of Things (IoT) to the portable micro gas chromatography (μGC) developed previously by our team for volatile organic compounds (VOCs) detection, and to provide the user with a more convenient way to control and monitor μGC. The experiments can be separated into two categories: the locally controlled mode and the remotely controlled mode, both using a commercial available product (Arduino Mega 2560 board) as the control platform of the μGC. The locally controlled mode is designed and executed by an Android compatible smart phone app as an interface for user to interact with the μGC through a Bluetooth service. If the Android phone is connected to Wi-Fi or 3G/4G network, it can also upload the data to database server. This architecture is suitable for operators who need to carry the μGC to different places usually. The remotely controlled mode, based on TCP/IP protocols, was designed and conducted via an Internet connection to allow the users to complete the control of the system from their personal computers or mobile devices through the webpage anytime and anywhere. We also try to implement two IoT architectures for remotely controlled mode. The first architecture is based on the query-driven approach. It sets our μGC as a micro web-server, waiting for commands from users to execute the assigned task, and reports back the chromatography result. In the second architecture, the μGC only acts as a client, using periodic polling to send real-time data to the application server and ask the server to search if there are new commands stored in the database by the users. The application server provides long-term data storage, and webpages for the interaction with the μGC by end-users. We successfully design and implement several IoT architectures, based on the various scenario analysis, and apply to the μGC, to improve the portability of the μGC and realize the functions of remote control and detection for easy and flexible environment monitoring applications.
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