Dual-redundancy photoelectric signal conversion device

Abstract

The invention relates to a dual-redundancy photoelectric signal conversion device, which comprises a serial port driver, a serializer, a deserializer, an FPGA (Field Programmable Gate Array) and an optical module, and is characterized in that the serial port driver is used for converting a serial port signal of an RS-422A protocol into a TTL (Transistor-Transistor Logic) signal; the serializer converts the parallel switching value data into an LVDS differential signal; the deserializer converts the LVDS differential signals received by the optical module into parallel data; the optical moduleconverts the LVDS differential electric signal into an optical signal and transmits the optical signal outwards through a tail optical fiber; the FPGA is responsible for providing a high-precision clock for the serializer and denoising and smoothing TTL square waves input by the serial port driver and the deserializer. The sending end and the receiving end of the dual-redundancy photoelectric signal conversion device jointly form a communication system, the number of interconnection cables between devices is reduced, the anti-electromagnetic interference performance is enhanced, and the reliability degree of communication is improved.

Description

technical field [0001] The invention belongs to communication devices, in particular to a communication device based on photoelectric conversion technology. Background technique [0002] The existing signal transmission medium between control devices is a cable, and there are a large number of interfaces such as switching value and serial port for each control number. The increase of control numbers will inevitably lead to an increase in the number of cables and wire diameters, making the electromagnetic environment in the narrow equipment installation space more complex. [0003] Therefore the shortcoming of existing transmission mode is: 1. A large amount of interface data such as switch quantity, serial port causes the cable number is various; It is not easy to install in a small space. [0004] Such as figure 1 shown. The existing control device and the execution device are interconnected by cables, and the control device sends switching value and serial port command...

AI Technical Summary

Problems solved by technology

The increase of control numbers will inevitably lead to an increase in the number of cables and wire diameters, making the electromagnetic environment in the narrow equipment installation space more complex

[0003] Therefore the shortcoming of existing transmission mode is: 1. A large amount of interface data such as switch value, serial port cause the cable number is various; It is not easy to install in a small space

It can be seen that the switching value and the serial port cables are all separated. Such a communication mode undoubtedly results in a large diameter and a large number of cables between the control device and the execution device.

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