PAPER MACHINE ROLLER HAVING FIBRE BRAGG SENSORS

摘要

A roller for use in paper machines includes a roller core, a roller covering surrounding the roller core, and at least one optical waveguide having a plurality of fiber Bragg gratings. The at least one optical waveguide is either arranged between the roller core and the roller covering or is embedded in the roller covering. Sections of the at least one optical waveguide which each contain a fiber Bragg grating alternate with sections of the at least one optical waveguide which are free of fiber Bragg gratings in the longitudinal direction of the optical waveguide. Sections of the at least one optical waveguide which each contain a fiber Bragg grating also enclose an angle with a circumferential direction to the roller of less than 80°, for example less than 60°, or less than 45°.