Application Study On The Wireless Distributed Sensor/Control Networks

Traditional measure and control technology changes completely with the infiltration of computer hardware and software, also network technology application provides advantages for it. Users can use the system conveniently without restrict of fixed cables etc. Based on it, Wireless sensor/control technology develops rapidly, which was mostly used in military field at first, but spreads into many fields such as equipments manager centralizedly, calamity alarm and house environment inspection etc. At present, domestic WDSCN technology and products of it inside are in the beginning, while its application has enlarged fastly. Therefore, the design of WDSCN platform is practical, which is fit for sensor measure and equipments manager centralizedly.Considering the actual needs for the lab to build wireless measure and control system, taking indoor working environment into account, RF technology is adopted. By introducing the fundamental principles and realization of WDSCN, analyzing core technologies such as sensor node forming, network system, data manager and task attempering, wireless distributed sensor/control networks is presented and put into practice. The paper based on the WDSCN system with RF technology has in-depth discussions of key technologies for wireless communication, single chip control and wireless network. Experiments have been done with actual equipments and common sensors in the lab, and some preliminary results were achieved.The paper introduces hardware design principle and method of WDSCN system in detail, discussing the selection and implement of microprocessor control module, hardware design and function realizatinon of RF module in wireless communication; discusses system network communication protocol based on wireless communication and brings forward self-organization network protocol and adaptive frequency hopping communication mechanism in order to avoid conflict. Considering low cost and carry device, low cost hardware elements are chosen and power save mode is designed in the software. The system takes full advantages of node work mode switch between sleep and awoken state to prolong device operational cycle. In order to prove system reliability and achievement of wireless sensor and monitor tasks implement, a lot of experiments are done. Analyzing the result of experiments, the system has met the design requirement and gains the satisfactory outcome. However, there are some localization and deficiency, the improved method and measure is proposed in the end.