Study of the technical feasibility of photogrammetry and coordinated measuring arms for the inspection of welded structures

The present paper studies the technical feasibility of Photogrammetry and Coordinate Measuring Arms (AACMM or CMA) for the geometrical inspection of welded pins used for the assembly of medium-sized sheetmetal structures. As a result of this evaluation it was found that the deviations (measurement recorded by the device minus the nominal value of the measurement) obtained by means of Photogrammetry and the CMA were equivalent. Moreover, the number of measurements found to be out of tolerance by both methods was statistically equivalent. According to our results both methods are feasible for performing the dimensional inspection of the position of the welded cylinders of the structure as they are able to distinguish measurements inside and outside of tolerance and are equally capable of detecting the data variance.