Measuring arrangement for detecting cracks

摘要

The invention relates to an arrangement for detecting cracks with the aid of optical fibres. The optical fibres are provided in this case with an interruption at the same level for coupling in light by sweeping with the aid of a light deflector. The two ends of the optical fibres are each assigned a photodetector whose output signals control an evaluation circuit for producing a display of the progress of the crack. <IMAGE>