| 摘要 |
A process and device for dynamic measurement of the axial deformation of a rotating hollow shaft ( 10 ), a glass fiber segment ( 16 ) of a fiber optic sensor ( 18 ) being attached securely to a section of the inside wall of the hollow shaft ( 10 ) extending in axial alignment with the shaft. A light signal produced by a light source ( 24 ) is injected into the glass fiber segment ( 16 ), and the light signal being detected by a detector ( 28 ) after passing through the glass fiber segment ( 16 ). Axial deformation of the section of the inside wall of the hollow shaft ( 10 ) is ascertained by determining axial deformation of the glass fiber segment ( 16 ) from the change of at least one parameter of the light signal that occurs when the light signal passes through the glass fiber segment ( 16 ).
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