光纤毛细金属管封装传感器及应变传递系数测试OA

In order to achieve strain monitoring and safety assessment of concrete,a fiber optic capil-lary metal tube encapsulated sensor was designed and manufactured.A study was conducted on the static characteristics of fiber optic capillary metal tube encapsulated sensors and the strain transfer rela-tionship between sensor monitoring strain and surface adhesive actual strain.Based on the structural design,manufacturing process,and material parameters,a theoretical numerical calculation model for the static characteristics of fiber optic capillary metal tube encapsulated sensors was established.The temperature,force,and strain sensitivity calibration experiments of the fiber optic capillary metal tube encapsulated sensors were completed,and the error relationship between the experimental calibration results and the theoretical numerical calculation results of the fiber optic capillary metal tube encapsu-lated sensors was analyzed.Finally,surface adhesion and tension experiments were conducted on the fiber optic capillary metal tube encapsulated sensors.The experimental results show that the applicable range of this fiber optic capillary metal tube encapsulated sensor is-60 to 50℃,the temperature sensitivity,strain sensitivity,and strain transfer rate of the fiber optic capillary metal tube encapsula-ted sensor are26pm·℃-1,1.1103pm/με,and91.918%,respectively.The surface mounted capil-lary metal tube encapsulated fiber bragg grating test is stable,with a strain transfer rate of 0.84 to 0.85,meeting engineering requirements.