Multi-path switching value parallel transmission system and method based on optical fibers

Abstract

The invention discloses a multi-path switching value parallel transmission system and method based on optical fibers. The transmission system comprises a sending unit, a distribution unit and M receiving units. The transmitting unit comprises n optical transmitters, each optical transmitter corresponds to one signal source, and the n optical transmitters transmit laser signals with different frequencies, which are transmitted by each signal source, into one optical fiber coupler through optical fibers connected with the n optical transmitters for coupling; wherein the optical fiber coupler inthe sending unit is in communication connection with the optical fiber coupler in the distribution unit through an optical fiber, the distribution unit distributes laser signals to different receivingunits through the optical fiber coupler, and each receiving unit comprises the laser signals sent by each signal source; the receiving unit comprises an optical wavelength division multiplexer, and the optical wavelength division multiplexer is in communication connection with the n photoelectric switches through n optical fibers. According to the transmission system, the problems of relay fault,signal transmission interference and incapability of self-checking caused by controlling the switching value through a relay in the prior art are solved.

Description

technical field [0001] The invention relates to the technical field of automatic electrical control, in particular to an optical fiber-based multi-channel switching parallel transmission system and method. Background technique [0002] The switch value is widely used in the field of industrial control and protection, such as the start and stop of the pump, the switch drive of the valve, the temperature level, the water level level, etc., all of which are driven or alarmed by the switch value signal. In the nuclear power plant, the emergency shutdown of the reactor also relies on the protection device to send a switching signal to the shutdown circuit breaker to trigger the emergency shutdown to ensure the safety of the reactor. [0003] In the traditional design, the switching value usually realizes the conduction or disconnection of the circuit through the opening or closing of the relay (mechanical or solid-state relay based on semiconductor technology) to represent the "0...

AI Technical Summary

Problems solved by technology

[0014] The purpose of the present invention is to provide an optical fiber-based multi-channel switching parallel transmission system, which solves the existing problems of relay failure, signal transmission interference, and self-inspection failure caused by relay control switching

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