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Research on a Miniature Bus Technology Based on Power Line Carrier Communication

Author: WuJiaZuo
Tutor: WuBoNong
School: North China University of
Course: Mechanical Manufacturing and Automation
Keywords: Bus technology PLC OFDM Bus-powered
CLC: TP273
Type: Master's thesis
Year: 2010
Downloads: 22
Quote: 0
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Abstract


With the rapid development of the field of microelectronics technology, communications technology and network technology, fieldbus technology has made rapid development. Intelligent field device communication based on the all-digital fieldbus control system (FCS: Fieldbus Control System) is being gradually replaced by a distributed control system (DCS: Distributed Control System). Fieldbus devices powered bus-powered and non-bus-powered, which bus powered divided into the centralized power supply, power supply and signal composite power supply. Composite power and signal-powered bus that can letter one bus can be achieved. This paper has introduced the research background and significance, research content, including overview of the development of the domestic and international fieldbus field. , Letter-one bus technology features some basic communication technology and has a wide range of modulation orthogonal frequency division multiplexing technology simple introduction. The paper details the energy, the letter one bus technology program research and development, system, and the function of each module and the hardware and software design. Small can of this study, letter-one bus communication line power supply device can direct the energy intake from the communication line allows field instruments, sensors and other nodes. The whole system is mainly composed of field device data acquisition unit, microcontroller unit, modem unit to receive the sending unit and the coupling circuit of several parts, the initial system architecture. Uses OFDM modulation and demodulation techniques to improve the the bus channel spectrum utilization and anti-jamming performance, not only to achieve high-speed data transmission, and to achieve the stability and reliability of the signal under the conditions of high-speed transmission. Using the device power supply line as a communication medium for the data information, and to avoid the shortcomings of the existing industrial automation systems need to be in the industrial field intricate wiring. The field instruments or sensors and other node devices can be mounted in any position without the need to rely on the power output port, not everywhere wires, with minimal impact on the working space. Long-range detection and control equipment, small can, letter-one bus system to connect a simple, easy to install, reliable communication, easy expansion, cost and other notable features. Through the analysis and research, using OFDM technology can, letter-one transmission can achieve. As an advanced industrial automation and control technology, full digital fieldbus networks of today's network communications and information management concepts into the field of industrial control, there must be a broad application prospects.

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CLC: > Industrial Technology > Automation technology,computer technology > Automation technology and equipment > Automation systems > Automatic control,automatic control system
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