A CoAP-Enabled IP-Based Sensor Network for Industrial Environment Monitoring

• Main Authors: Yen-Po YEH, 葉彥伯
• Other Authors: Huang-Chen Lee
• Format: Others
• Language: zh-TW
• Published: 2015
• Online Access: http://ndltd.ncl.edu.tw/handle/xmmmng

碩士 === 國立中正大學 === 通訊工程研究所 === 103 === Internet of Things brings a new information revelution to the whole world. Everyone want to apply the technology to their fields. Industry, one of them, concerns about the status of the manufacturing machines, which affects the quality of products. In order to know the status of the machine, sensors were deployed. The sensor nodes, who gather data from sensors and send them back to host, have different requirement to the communication abilities. Some of them need high transmission speed, and some of them need reliability. However, devices are hard to communicate with each other in the system with mixed low-layer communication protocol. It’s also hard to add new sensor nodes into the sytem. Current studies usually adopted traditional sensor network which sink nodes collect data from sensor nodes by only one communication technique. But traditional architectures are not suitable for IoT in real applications. For exanples, there are many kinds of factors that effect the wear status of component in tool machine monitoring like pressure, temperature, and vibration. Not all of the data of them can be sent only by ZigBee or any other protocol. Our study proposed a sensing system using Constrained Application Protocol and Internet Protocol version 6. In the system, sensor nodes adopted different communication method like Wi-Fi, Bluetooth Low Energy, and Ethernet according to its requirement. Besides, devices who acted as server or client can exchanged messages easily by the uniform interface¬ – CoAP. With the help of IPv6, sensor nodes can transmit data to any corner in the system or even internet. Furthermore, it helped new sensor nodes connecting to the system.