Roadway dip angle inclinometer based on reflection-type optical fiber and dip angle measuring method

The invention discloses a roadway dip angle inclinometer based on reflection type optical fibers and a dip angle measuring method, and relates to the technical field of geotechnical engineering sensing. The inclinometer comprises a shell and an inclinometer body, wherein the inclinometer body comprises an optical fiber integrated probe, a reflecting mirror, a movable plate, a displacement conversion block, a main shaft and a balancing weight; the optical fiber integrated probe is installed on the inner wall of a top cover of the shell and comprises a single-mode optical fiber and a multimode optical fiber, and the reflecting mirror is located on the movable plate; the movable plate is transversely installed in the shell, and a spring is arranged between the movable plate and the inner wall of a top cover of the shell. A balancing weight is arranged at the bottom end of the spindle. When an object to be measured is inclined, the relation between the optical power and the displacement H can be measured through