Method for monitoring closed circular coal yard optical fiber temperature and optical fiber monitoring device

Abstract

The invention discloses a method for monitoring closed circular coal yard optical fiber temperature. In the method, optical fiber temperature sensing cables in the optical fiber monitoring device are paved by adopting a linear or U-shaped annular disk form with a mode of uniformly distributing and paving the optical fiber temperature sensing cables along one circumference of a coal retaining wall; the optical fiber temperature sensing cables are arranged on the coal retaining wall at intervals of 1 to 2 meters; a background service system of an optical fiber sensing analyzer acquires temperature information of positions where the optical fiber temperature sensing cables reach; a user remotely controls an operating system on an upper computer of a coal conveying program control room through an Ethernet network; stored data is output through a display and a printer; an industrial personal computer concentrated graphic monitoring and displaying system is adopted; and an alarm signal is transmitted to a programmable logic control (PLC) cabinet in the coal conveying control room. By the method, a fire situation and a temperature situation of a detected region of the coal retaining wall can be comprehensively, continuously and dynamically monitored in real time and on line; the detection range is large; and the type of an accident, the position of the accident and the size of a disaster area can be judged timely and accurately; and a temperature state of any point can be displayed accurately at any time.

Description

technical field [0001] The invention relates to a method and a device mainly used for monitoring the self-heating temperature of coal stored in a closed circular coal yard. Background technique [0002] In the power generation industry, the hidden danger monitoring of the self-heating and self-ignition temperature of the fuel supply part of the closed circular coal yard is very important for safe production. The conventional temperature monitoring method (Li Yunting, Wan Zhenkai: "Pt100 Temperature Sensor Data Real-time Acquisition System", "Instrument and Meter Users", 2007, Issue 05) PT100 temperature sensor temperature measurement is set between two support arm columns (100) to set 4 A group of temperature sensors are installed in the lower part of the circular coal yard in two layers. There are few temperature measurement points and a small local range, which cannot fully meet the requirements and requires new technical means to provide support. Contents of the inv...

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Problems solved by technology

The conventional temperature monitoring method (Li Yunting, Wan Zhenkai: "Pt100 Temperature Sensor Data Real-time Acquisition System", "Instrument and Meter Users", 2007, Issue 05) PT100 temperature sensor temperature measurement is set between two support arm columns (100) to set 4 A group of temperature sensors are installed in the lower part of the circular coal yard in two layers. There are few temperature measurement points and a small local range, which cannot fully meet the requirements and requires new technical means to provide support.

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