Method for measuring vibration of object to be measured based on fiber bragg grating and vibration sensor

The invention discloses a method for measuring vibration of a to-be-measured object based on a fiber bragg grating and a vibration sensor, and relates to the technical field of geotechnical engineering sensing. The vibration sensor based on the fiber bragg grating comprises a shell and a magnetic body, at least two groups of elastic sensitive elements are arranged between the shell and the magnetic body, and when the shell senses vibration of an object to be measured, force generated by the vibration is transmitted to the magnetic body through the elastic sensitive elements; the magnetic body is located on the central axis of the shell, the inner walls of the shell near the top and the bottom of the magnetic body are respectively provided with a group of fiber bragg gratings, the outer surfaces of the fiber bragg gratings are packaged by a magnetic material, and when the magnetic body moves up and down, the fiber bragg gratings generate strain along with the magnetic body. The vibration sensor is simple in in