Suction cup rig on a rudder (App. no.1)
- Overview - Suction cup rig (SCR) on rudder - SCR on yacht structure
- SCR on yacht mast - Vacuum hood application - The used products
Detection of defects on a rudder by dynamic loading
The suction cup rig permits rapid and rigid mounting of sensor with high flexibility:
Upper left: Setup for measurement on a rudder by dynamic loading. The direct rigid mounting of the sensor on the rudder by the suction cups allows outdoor measurement even at strong winds. The high quality interference filters of the sensor permits measurement under day light conditions.
Right: Measurement results (time average) showing local vibration modes of defects due to reduced or inhomogeneous stiffness of the material. Even if a big field of view is selected, it is possible to detect small defects as shown in the lower right measurement. Defect size and type as well as the depth of the defect (delamination) determine the normal modes (resonance frequency) of the local defect area.
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