Digital signal fiber transmission triggering system

Abstract

The present invention discloses a digital signal fiber transmission triggering system. The system comprises an electric signal-optical signal conversion module and an optical signal-electric signal conversion module which are connected through a fiber connection line; the electric signal-optical signal conversion module has an input end which is taken as the signal input interface of a digital signal fiber transmission triggering system and is configured to receive external digital triggering signals; and the optical signal-electric signal conversion module is configured to convert the digital signals through external input to optical signals, and the optical signal-electric signal conversion module is configured to convert the optical signals to high low-level digital triggering signals and realize opto-couplers isolation and power amplification of the digital triggering signals. The digital signal fiber transmission triggering system is able to overcome the defect of the inductor (or transformer) type isolation anti-interference capability and solve the problem of the common transmission channel of capacitive coupling noise and signals, is low in cost, extensive in applicability, high in reliability and high in carrying load ability and has long-distance fiber transmission signals, etc.

Description

technical field [0001] The invention belongs to the field of digital isolation trigger circuits, and more specifically relates to a digital signal optical fiber transmission trigger system. Background technique [0002] The digital isolation trigger circuit is mainly used for the transmission of digital signals and switching signals. The role of the isolation circuit plus optical fiber transmission is to eliminate the common mode noise loop, and to protect devices (or people) from high voltage hazards, and to achieve long-distance transmission. There are many types of devices used to provide isolation. According to the production process, electrical structure and transmission principle, they are mainly divided into digital isolation devices of inductance or transformer, capacitive coupling and optical technology. Inductive (or transformer) isolators use a constantly changing magnetic field to communicate through the isolation layer, which can reduce common-mode noise withou...

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Problems solved by technology

[0004] In view of the above defects or improvement needs of the prior art, the present invention provides a trigger system for digital signal optical fiber transmission, which can overcome the shortcomings of inductive (or transformer) type isolation and anti-interference ability, the problem of capacitive coupling noise and signal sharing transmission channel, At the same time, it overcomes the shortcomings of existing photoelectric isolators, and has the advantages of low cost, wide applicability, high reliability, strong load capacity, and long-distance optical fiber transmission signals, etc.

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