A Sensing Mechanism and the Application of a Surface-Bonded FBG Dynamometry Bolt

In the present paper, a new type of surface-bonded fiber Bragg grating (FBG) dynamometry bolt is designed. It assumed that adhesive layer linear viscoelastic material and its creep mechanical behavior expressed by standard solid model. The shear strain transfer model FBG sensor established. Additionally, instantaneous quasistatic functions are obtained. validated uniaxial tensile test long-term constant-load test. results show measured has proportional relationship with resistance gauge. Furthermore, under fixed load for long period time, tendency to drift reduction rate about 40.5%. Finally, field application carried out in mining area. been proved ground pressure online monitoring system based on sensing technology can successfully monitor stress rock bolt.