Application Research Of Low Voltage Power Line Carrier Communication Technology In Process Parameter Measurement And Control System

In recent years, along with the development of computer technology, electronic information technology and communication technology, low voltage power carrier communication has become the focus of the current research. Low voltage distribution network, as the largest and most widely used information transmission network, due to the advantages of no need of rewiring, low cost, convenient installation and debugging, has a huge market prospects and competitiveness. The emergence of Spread spectrum communication technology and OFDM modulation technology has greatly improved the reliability and transmission speed of low-voltage power carrier communication.This thesis is supported by the tutor’s project- "the research and application of low voltage power line carrier communication in the measurement and control system". In this paper, a process parameter measurement and control system was researched and designed.Because of the widely using of special signal cable laying,there are many problems in the traditional measurement and control system such as high cost, difficult maintenance and the limited scope of cover of the sensor. In order to solve these problems, the design used the low-voltage power line carrier communication technology in process parameters measurement and control system. The system consists of three pieces of the same carrier communication module that use Fuxing Xiaocheng PL3201 chips, the LabVIEW software,two pieces of the data acquisition and alarm control module that use low voltage power line and AT89S52 microcontroller. The main function of this system is to acquire the data of of temperature, humidity, smoke, rainfall and infrared alarm information in industrial field. The real-time and reliability of prototype system conform to the requirements of the general process parameters measurement and control system in the laboratory and industrial field environment.In the end, the summary of the whole thesis, current shortcomings of the system and future work are given. Also, the summary of my work and research progress during master-degree study are described.