Coal face is the most important working environment in coal mining, with the development of large-scale and mechanical coal mining, the quantity of dust is increasing constantly. The damage of a great deal dust is very seriously, it can bring the mine worker with occupational diseases, and also be a hidden danger of accident in
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Coal face is the most important working environment in coal mining, with the development of large-scale and mechanical coal mining, the quantity of dust is increasing constantly. The damage of a great deal dust is very seriously, it can bring the mine worker with occupational diseases, and also be a hidden danger of accident in
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In recent years, the technology of low-voltage power line as communication media transmitting data has been studied intensively and got wide application in projects such as auto meter reading(AMR) systems, intelligent buildings, and street light control systems. Being a channel originally designed for transmitting energy instead of messages, the power line is of course not
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Home power line communication system exploits power line to the transmission of data. It has many superiorities like large numbers of users, widely distribution and no rewiring. Home PLC system can be used as an effective means of home network communication. However, the PLC channel exists multi-path fading effects and has many kinds of channel
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Recently, broadband Power-line Communication (PLC) has been a hot research topic in the world with its advantages of wide coverage, no wire line and convenient connection and is expected to be the solution of the “last mile” for the Information Superhighway. However, power-line channel is plagued with numerous difficulties, including multipath distortion, narrowband interference (NBI)
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Home energy management system (HEMS), a key user side component of the smart grid, is significant for reducing the energy consumption. This paper designed and implemented a home energy management system based on power line communication (PLC). The system is used for monitoring and managing the energy use of appliances. In this paper, the following
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Low Power Line Carrier Communication, due to the world’s most widely distributed medium, has been concerned by academia and industry extensively. However, the power line was originally designed for the transmission of electrical energy, when used for data communication, the Low-voltage power line channel represents high attenuation, high noise and time-varying characteristic, resulting in data
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Power Line Communication referred to as Power Line Communication isthe use of low-voltage distribution network transmission of multimediasignals a line of communication，along with the development of power systemdevelopment，it is the full use of existing power line network resources，andas information transmission a method of communication medium. As thepower line network extending in all directions，widely distributed，can beextended
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Power Line Communications, also called PLC, refers to a mode of transmission ofsignals, such as language and data etc., by power lines. Orthogonal Frequency DivisionMultiplexing, also called OFDM, is a critical technology for the realization of PLC. TheOFDM, which has an excellent resistance against multipath fading and interference, is animportant technique of data transmission. However,
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In order to improve the reliability of the power line communication, the design of error-correcting code is researched chiefly in this paper. Firstly, the noise and attenuation characteristics of power line channel are measured and analyzed. The channel noise and attenuation model are simulated by MATLAB. Secondly, based on the analysis of the traditional BCH
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