Abstract
In order to solve difficulty of transmission of data acquisition and monitoring signals from high voltage remote side to user side in electrical power system, some problems about a 32 Mb/s optical fiber data transmission system with time-division multiplex are studied emphatically. The optical fiber transmission system has been developed in the laboratory and has the following features: multi-input analog signals in the remote side can be merged into a single-path digital signal by using A/D conversion and multiplex techniques, this single-path digital signal is sent to user's instrument or computer device via the optical fiber transmission system with high speed. Another optical fiber transmission system with low speed is also adopted to send user's various orders to control unit of data acquisition in the remote side. Two monitoring systems of one-chip microprocessor located respectively in the remote side and user side are communicated with each other by their duplex serial ports, the system monitoring and remote controlling has been realized. One channel of duplex ports use optical fiber low speed transmission system, another channel's code has been compounded into bit stream of optical fiber high speed transmission system.
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