Shop Floor-oriented Wireless Sensor Network Design And Implementation

Wireless sensor networks (WSN) emerged with increasing maturity of wireless communication and networks technologies, micro-electro-mechanical systems technology and sensing technologies. Wireless sensor networks, which have features of low cost, self-orgnization and tiny size etc., has the probability of decreasing the costs of wired cables and monitoring flexibly in industrial applications, and therefore attracted many researchers'attention.At the same time, as the rising and development of concepts of ubiquitous computing and Internet of things, researches about the way that perceive, connect and exchange information among human, things and environment by WSN have been gradually changing human beings'daily life. In industrial manufacture, the on-site monitoring of workshop environment and equipments from shop floor personnel, lack of a flexible method of identifing and accessing sensing information of local areas, equipments and other entity objects wirelessly. Meanwhile, from the perspective of personnel monitoring, workshop on-site staff also cannot be identified, monitored and acquired physiological status.Based on analysis above, according to problems above on the shop floor, the dissertation proposed a prototype system of shop floor wireless sensor networks (SF-WSN), and researched on networking, query and other key functionalities of SF-WSN. The main researches and innovations as follows:1. Analysis on architecture of SF-WSNThis dissertation proposed a two-tier hierarchical cluster topology of SF-WSN according to properties of heterogeneity, interaction and mobility, and on this basis, determined operation flow of SF-WSN.2. Designs of SF-WSN networkingBased on the topology of SF-WSN, this dissertation designed networking and network maintenance functions based on Zigbee protocols. It is the most important that analysis and design of networking technology which suits to interact among entity objects in SF-WSN. 3. Design of SF-WSN query layerThis dissertation designed the main services of query layer of SF-WSN that contained entity objects definitions, messages, data process and query using component-based approach, in order to enhance perception, information interactions and monitoring among entity objects on the shop floor.4. Experimental prototype of SF-WSNThis dissertation designed SF-WSN experimental prototype based on SF-WSN prototype system in order to improve the practical value and general characteristics of follow-up researches, and experimented towards data integrity, transmission delay, query lantency and other performance requirements for providing data support to future researches.