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Study on Access Control System Based on Low-voltage Power Line Carrier Communication

Author: XiaoDongHai
Tutor: ZhongYuanChang
School: Chongqing University
Course: Circuits and Systems
Keywords: low-voltage power line carrier communication access control FM communication protocol Sytemview
CLC: TM73
Type: Master's thesis
Year: 2009
Downloads: 200
Quote: 2
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Abstract


With the improvement of living standards, people bring forward a higher requirement on access control system of home and office environment. At the same time, intelligent community, double deck, an upstairs and a downstairs, as well as upgrade of the living environment, access control system in which the investment has started to increase, and its popularization and application have a bright future. Therefore, it has a very important practical significance to study on access control system.At present, in accordance with the data transmission, the existing access control system can be divided into: Wireless Communications and line of communication (using a dedicated line to transmit information, such as telephone lines, closed-circuit line, etc.). Wireless communications and line of communication exist the problem of high equipment costs, there are also the shortcomings of their own: on the one hand, wireless communication access system, the existence of frequencies is limited, the shadow fading, multipath interference and other electromagnetic interference, the system reliability and security constrained; On the other hand, line communication access system, there are two shortcomings:①If the house has been wired the lines dedicated to transmit access control signal, there are often only access to the door, access control systems can only be installed on the line access, and one access control machine can only connected into indoor, each using system must be to a fixed-point operation, so that systems are the lack of flexible;②If there are without lines specialized for transmitting access control signal into the house, and installed the access control system based on special railway line, then the way must to use of the open wire, but it is impact of aesthetics. Therefore, to explore a new means of communication has become the hot spot of access control system.The purpose of this project is on the basis of in.depth study of Low-voltage power line carrier communications, combined with the specific application environment of the access control system, to study the practical technology in the field of access control system based on Low-voltage power line carrier communication. Include: analyze the Low-voltage power line channel characteristics and establish the simplified model of Low-voltage power line channel; analyze the specific application environment of access control system and research the key technologies of Low-voltage power line carrier communication system, establish the mathematical model of Low-voltage power line carrier communication system, and simulate by Sytemview; on the basis of simulation model of Low-voltage power line carrier communication system, develop the access control systems of Low-voltage power line carrier communications, give a detailed design process of software and hardware.Theoretical analysis and experimental results show that access control system based on low voltage power line carrier communication, solve the shortcomings of the existing access control system, and be with low cost, convenience, safe and reliable. Therefore, it is an important theoretical and practical value for the use of Low-voltage power line carrier communication as a communication means of access system.

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CLC: > Industrial Technology > Electrotechnical > Transmission and distribution engineering, power network and power system > Power system scheduling, management, communication
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