The Application Of Distributed Sensing Technology In Coal Mine

For the conventional electrical sensor can not meet the requirements of coal mine temperature detection of mine goaf, power cable and belt conveyor, based on the traits of fiber sensing and distributed optical fiber temperature sensor which can multi-point measure with large range, taking distributed optical fiber temperature sensor as core,this paper introduces the distributed optical fiber temperature measurement system.This system can take temperature measurement of the optical fiber,not only do high-temperature points for accurate positioning, but also be able to prevent the fire incident in the first place,which is of great research value.Firstly, this paper studies the temperature measurement principle of distributed fiber optic temperature sensor. According to the anti-Stokes Raman scattering in the relationship between light and temperature, determined using Stokes scattered light regulation of anti-Stokes light scattering method to measure the temperature of the fiber, quantitatively analyze on the spontaneous Raman scattering and the stimulated Raman scattering, determine the Raman threshold,inhabite stimulated Raman scattering.This paper studies the measurement principle of distributed optical fiber temperature measurement system.According to Raman scattering anti-Stokes light and the relationship between the temperature determined using the Stokes scattered light modulating anti-Stokes light scattering method and the principle of optical time domain reflection to locate the position, so as to determine the temperature along the cable line.Then, this paper introduces the system structure of distributed optical fiber temperature measurement system and the function principle of each part. The hardware of the distributed temperature measurement system in Yankuang Group Xinglongzhuang Coal Mine optical fiber monitoring project, and various parts of the detailed technical indicators are introduced in detail.Finally, this paper introduces the embodiment of Yankuang Group Xinglong Mine fiber monitoring program, which focusing on the coal goaf security monitoring system, belt temperature monitoring system and underground cable joint 6KV line temperature monitoring system based on three of Distributed Temperature Sensing art online testing system, introduces three sets of project construction and commissioning of the system operation.