Boiler expansion monitoring system based on plastic optical fiber ring network

Abstract

The invention discloses a boiler expansion monitoring system based on a plastic optical fiber ring network. The system comprises a plurality of monitoring nodes, a communication master station and a bus conversion module. Each of the monitoring nodes comprises an expansion sensor module and a communication module, and the expansion sensor module is connected to the communication module. After thecommunication modules in the plurality of monitoring nodes are orderly connected in series through a plastic optical fiber, the communication modules are connected to the communication master stationin series through the bus conversion module, and a closed-loop optical fiber ring network is formed by the monitoring nodes and the communication master station. The bus conversion module is used forcarrying out two-way communication between the communication module and plastic optical fiber ring network and the data exchange between the plastic optical fiber ring network and the communication master station. The communication master station is used for collecting, storing and displaying real-time expansion data of each expansion monitoring point. According to the system, the plastic opticalfiber is used as a signal transmission medium, the plastic optical fiber is used to connect a plurality of expansion monitoring nodes and the communication master station in series to form an opticalpath ring network, and the measurement, collection, transmission, storage and monitoring of boiler expansion parameters can be effectively completed.

Description

technical field [0001] The invention belongs to the technical field of boiler monitoring, in particular to a boiler expansion monitoring system based on a plastic optical fiber ring network. Background technique [0002] In the control of boiler startup and shutdown, once the temperature changes too quickly, it is easy to cause a large expansion difference between the boiler water wall tube panel and the header, resulting in a cracking accident. The degree of boiler thermal expansion is one of the key parameters for power plant boiler monitoring. Accurate and real-time monitoring of boiler thermal expansion parameters plays an important role in ensuring the safety of power plant operation. [0003] At present, the research status of boiler expansion monitoring technology is as follows: [0004] The announcement number is CN205375118U, and the Chinese patent titled "Boiler Expansion Monitoring System Based on Hierarchical Communication Mechanism" discloses a boiler expansio...

AI Technical Summary

Problems solved by technology

The twisted pair communication network is low in cost, easy to realize technically, and has a certain ability to resist electromagnetic interference, but it cannot shield well against strong electromagnetic interference.

And as the signal frequency increases, the transmission attenuation of the twisted pair increases accordingly.

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