Implementation Of FBG Sensors In The Pressure Monitoring System Of Mine

Research progress at home and abroad of mine pressure monitoring system, Summarizesthe existing problems in traditional monitoring system, The use of a large number of factsprove the widely application of fiber grating in various fields, and achieved considerableeffect. Through the use of civil engineering, the pressure monitoring system based on FiberBragg grating sensing, then the paper from the understanding of the optical fiber, Introducesthe principle of fiber Bragg grating sensor. The strain on the parameters of the sensor responseand Multi point monitoring network in practical application, after In a detailed analysis of thecoal mining face and roadway formation mechanism of disaster, Design a set of pressure,displacement sensor. In order to validate the use function of sensor design, calibrationexperiment was carried out and verified test in the laboratory, the results proved to achieve thedesired effect.We get the following conclusions in this design and experiment process:（1） Wavelength demodulation instrument waveforms overlapping pheno-menon hasnot resolved in search of optics literature, in this optical aspect of literature, the specialstructure of equal strength beam as the carrier and the grating to force can solve theoverlapping and multi peak phenomenon.（2） In the intelligent choice of materials, high elastic material is the guarantee oflarge strain of choice, In order to grating matching accuracy, as far as possible to produce largestrain based on the requirements of packaging size through the screening of the physicalproperties of the material, the choice is the spring steel3J53.（3） There are a lot of methods of curve fitting: Curvature integral curvilinear position,Curvature integral recurrence curve, and the bilinear interpolation of curvature. In thesettlement of ground surface displacement monitoring system using curvature integralrecursive curve position and curvature of linear combination, using assembler completed fitting.（4） In the process of experiment proves that monitoring system meets the applicationrequirements of roof separation, and surface pressure.