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Study on Construction and Application of Communication Interfaces in Distributed Wireless Sensor Network

Author: ZhouJingJing
Tutor: LinYuChi
School: Tianjin University
Course: Measuring Technology and Instruments
Keywords: Wireless communication Distributed wireless sensor networks Information channel interface Communication protocols Embedded USB Host / Slave SL811HS firmware Hopping
CLC: TP212.9
Type: Master's thesis
Year: 2007
Downloads: 138
Quote: 0
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Abstract


With the development of wireless personal area network technology, the wireless distributed sensor networks in industrial measurement and control applications, the need to focus on the sensing and control site has a great demand for wireless distributed sensor network. In order to be able to meet to join the wireless sensor node in the network to facilitate distributed wireless sensor network channel interface building has become a hot topic. The subject from the laboratory to the actual needs, and research distributed wireless sensor network information channel interface and applications. Subject design general information channel interface, according to the characteristics of the distributed wireless sensor networks, by contrast, select the radio frequency technology, networking solutions; versatility distributed wireless sensor network technology, interface technology, embedded real-time system technology, the A / D converter interface, RS232 serial port, RS485 serial port and embedded USB Host / Slave interface integrated in an embedded structure module constructed from four-wire transmission to the wireless transmission of information channel. Subject to the use of data processing, four sub-modules of the wired interface, wireless communications and supply information channel interface hardware circuit connection, use C8051F020, ADM3202, MAX3430 is available in SL811HS and nRF905 to achieve the four cable interface and wireless module development. The selected industry Modbus communication protocol, to facilitate the expansion of the system. The preparation of the A / D converter, RS232 serial port, RS485 serial port, USB interface and wireless data transmission applications, completed according to the communication protocol between the main base station and each node as well as their resistance to interference adaptive frequency hopping method the host computer, the primary base station and nodes workflow design. Which, taking into account the USB emerging peripheral interface technology, the paper focuses on the USB bus protocol developed USB interface circuit, how to design a USB interface Host-side firmware. Information channel interface design, automatic connection of the wireless and wired \point. The main control of the PC and the main base station via RS232 serial and USB interface to achieve data exchange written in LabVIEW applications, and by the completion of the data processing and control of the entire wireless communication network. Topics from different emphases do four typical experiments, system testing and experimental results show that the information channel interface to provide a simple and reliable way to build distributed wireless sensor networks.

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CLC: > Industrial Technology > Automation technology,computer technology > Automation technology and equipment > Automation components,parts > Transmitter ( converter),the sensor > Sensor applications
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