A Fiber Bragg Grating Sensor for Positive and Negative Displacement Measurement

This work presents a fiber Bragg grating (FBG) displacement sensor suitable for alternate positive and negative displacement measurement. When measuring alternating displacements, existing FBG displacement sensors need to pre-stretch to a certain state, thus the elastic element of the sensor will in a state of large deformation instead of the working “zero deformation point”. The elastic element i...