| Summary: | 碩士 === 國立高雄第一科技大學 === 電腦與通訊工程所 === 91 === A Study on Data Transmission by Power Line
Student：Chyi-Taur Lin Advisors：Dr. Wei-Chih Hsu
Department of Computer and Communication Engineering
National Kaohsiung First University of Science and Technology
英文摘要
ABSTRACT
This paper presents a characteristical measurement of power line to probe the possibility as a kind of communicational medium. The electric potential attenuation of power line against frequency has been measured by means of signal generator, frequency counter, and ocsilloscope. We wrote a program to measure the byte-loss rates of the server-to-client data transmission on the power lines with different lengths. Besides,we also investigated the influences of no-fuse breaker and the power with different phases on data transmission.
In application, we constructed a PC-based power line communicator to control a programmable message sign. The alphanumerical characters were sent from the computer to the message sign for display. We also programmed a timing corrector to actively or passively transmit the date and the time of the server computer to the client computer for alignment. The experiments show that power line is capable of data transmission.
The experimental results reveal that the electrical attenuation of power line varies with frequency. The transmission distance and the numbers of connected appliances also affect the loss rate of data transmission.
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