Automated NDT on guide blade rings of air turbines

Here the SE4 Sen­sor is used in com­bi­na­tion with an auto­mat­ic attached Piezoshak­er for dynam­ic exci­ta­tion. The SE4 is oper­at­ed in time aver­age mode dur­ing fre­quen­cy sweep­ing for detect­ing local defect res­o­nances of the sol­der­ing of the seal­ing band. The two mea­sure­ments on the left show pre­pared defects. Upper left: hor­i­zon­tal shear­ing, time aver­age mode; Below: ver­ti­cal shear­ing and stro­bo­scop­ic mode for phase reconstruction.