Method and device for the dynamic measuring of the axial deformation of a rotating hollow shaft

摘要

The dynamic measurement of axial distortion in a rotating hollow shaft (10) uses an optic fiber sensor (18) with a glass fiber section (16) secured axially along the inner wall of the shaft. A light signal is transmitted to the glass fiber section to be registered by a detector. A change in at least one light parameter indicates an axial distortion of the optic fiber caused by a shaft wall distortion. Detector signals are transmitted by telemetry to an external evaluation unit (34).