Distributed fiber Bragg grating inclinometer device and inclination metering method

The invention discloses a distributed fiber Bragg grating inclinometer device and a distributed fiber Bragg grating inclination metering method. The distributed fiber Bragg grating inclinometer device comprises an inner connecting pipe, a fiber Bragg grating tilt sensor fixed in the inner connecting pipe, and an optical cable connected with the fiber Bragg grating tilt sensor, wherein the fiber Bragg grating tilt sensor comprises a base with an inner cavity, a first fiber Bragg grating and a second fiber Bragg grating; a cantilever pendulum is fixed on the top of the base, and the first fiber Bragg grating is fixed on the cantilever pendulum of which the lower end is a free end; the second fiber Bragg grating is fixed on the lower part of the base and is suspended, and two ends of the second fiber Bragg grating are fixed on the base; and the fiber Bragg grating and the second fiber Bragg grating are connected in series by virtue of the optical cable. According to the device and method disclosed by the inventi