Bidirectional displacement device and method for crack deformation monitoring based on optical fiber sensing technology

The invention discloses a bidirectional displacement device and method for crack deformation monitoring based on an optical fiber sensing technology, and relates to the technical field of crack monitoring, and the bidirectional displacement device comprises a bidirectional displacement meter and a data processing unit. The bidirectional displacement meter comprises a transverse displacement meter and a vertical displacement meter, the transverse displacement meter and the vertical displacement meter are combined to form a 90-degree included angle and are arranged at a crack to be monitored, and the transverse displacement meter and the vertical displacement meter are respectively used for monitoring transverse and longitudinal deformation of the crack to be monitored; a data acquisition unit is connected between the bidirectional displacement meter and the data processing unit, and the data acquisition unit receives an instruction sent by the data processing unit, then acquires the wavelengths of light waves