Optical fiber field bus communication system

Abstract

The invention discloses an optical fiber field bus communication system which is suitable for the special industry and mining fields such as the mines, the airports and the like and adopts the specialcommunication method, belonging to the field of the automatic information processing technology. The optical fiber field bus communication system comprises single-mode optical modules, a filed bus communication board and an ARM control mainboard; the single-mode optical modules are used for the optical signal transmission and the information connection among communication nodes; the filed bus communication board is used for realizing the physical layer protocol and the data link layer protocol of a communication device, modulating and demodulating data and converting an upper layer data format and a lower layer data format; and the ARM control mainboard is used for realizing the application layer protocol of the communication device and compiling a communication protocol, a frame format and the like. The optical fiber field bus communication system is suitable for the special industry and mining fields such as the mines, the airports and the like, has the advantages of high communication speed, far communication distance, strong electromagnetic interference resisting ability and plays an important role in reducing the safety accidents in the mines, the airports and the like and guaranteeing the communication between the control console and all the field equipment.

Description

technical field [0001] The invention relates to the field of information processing technology in the field of information technology and automation, in particular to an optical fiber field bus communication system, which can be widely used in remote real-time monitoring of field equipment in special environments such as airports and coal mines, and is composed of a distributed ring network topology structure The advanced fieldbus communication system is suitable for the global monitoring and monitoring process in airports or coal mines and other environments. Background technique [0002] In special application environments such as coal mines and airports, due to severe problems such as wide field range, large transmission distance, large data volume, and serious electromagnetic interference, the on-site communication system is required not only to have high real-time performance, but also to be able to carry out long-distance big data Mass transmission, and must have stron...

AI Technical Summary

Problems solved by technology

Fieldbus control systems generally use short frame format to send messages, which often appear to be insufficient in the face of large data volume and long-distance transmission requirements

At the same time, the bus structure makes all field devices connected to a bus. Once a point on the bus fails or is disconnected, the entire system will be paralyzed.

[0004] Industrial Ethernet adopts carrier sense multiple access / collision detection (Carrier Sense Multiple Access / Collision Derect, CSMA / CD) medium access mode, the communication is random and uncertain, and the real-time performance of information transmission cannot be guaranteed. The network also adopts the bus structure, which has the same security risks as the field bus

[0005] The transmission distance of the wireless network is limited, and the high-speed transmission is limited to a certain range. At the same time, the construction of a wireless network must establish a base station or an access point, which increases the system cost to a certain extent.

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