Composition and function of optical fiber temperature measurement system The optical fiber temperature measurement system is composed of optical fiber communication, optical fiber sensing, signal demodulation, alarm control and other units. There are five parts of the processing module and the calibration temperature control module. It is composed of temperature measuring host, working condition machine, optical fiber sensor, alarm device and monitoring system software. The distributed optical fiber temperature monitoring host is the core component of the system, which realizes the functions of optical signal generation, spectral analysis of backscattered signals, photoelectric conversion, signal amplification and signal processing. The measuring range is about 7km, the temperature resolution is 0.1 ℃, the spatial resolution is 1m, 36 alarm output dry contacts can be provided, and information such as equipment status and optical cable status can be output. The working machine collects and analyzes data in real time by installing local running software, and realizes communication with the master station computer.
The optical fiber temperature sensor is installed on the outer end surface of the belt transmission roller to monitor the belt temperature change in real time. It has the characteristics of fast response and small fiber attenuation, which greatly improves the measurement accuracy and measurement range of the system. Alarm device, sound and light alarm signal in case of failure, easy for maintenance personnel to discover in time, SMS alarm function also provides monitoring and alarm information for unattended site staff. The monitoring software provides a full-range zoning map of the monitoring site line and its temperature distribution curve. It has 6 types of alarms, provides alarm analysis for monitoring environmental temperature changes, analyzes real-time data, and can output temperature anomalies in time by setting various types of temperature alarms Point, and save the data at each moment to realize the display and query function. Practical application and function of optical fiber temperature measurement system There are eleven belt conveyors in the three mining areas of east and west of the underground coal belt transportation in the coal mine. Four belt conveyors in the centralized belt transportation lane are in total. According to the difference in the running time of the belt conveyor, an optical fiber temperature monitoring system is mainly arranged on the four belt conveyors in the centralized transportation lane of GTPD-D1 to GTPD-D4. Each belt conveyor drives the belt conveyor, redirects the roller bearings, upper and lower roller bearings, and A total of 136 parts such as motors, tape reducers and other running bearings were installed with sensors to monitor the temperature in real time, and transmitted to the monitoring host using optical fiber, and used computer and database technology to manage and analyze the collected data.
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