Deformation measurement

Task

Object deformation fields (magnitude and direction) can be determined with maximum efficiency and precision using photogrammetric technology. A standard application for photogrammetric deformation measurement is climate testing for automotive plastic parts or deformations of machines under load. On the right the deformation of a car (Fig. 1 and Fig. 2) and a stamping press (Fig. 3 and Fig. 4) are shown at different load conditions.

Procedure

The measuring principle is a least squares photogrammetric bundle adjustment. Two or more deformation states for the target object are established. Transforming the two resulting datasets into a common coordinate system (vehicle-fixed or floating), the deformations are shown as vectors.

Result

In these examples we measured deformations of a few tenths of a millimeters. The 3D representation gives an overview of the spatial orientation of the deformation. The resulting vectors can be color-coded and projected into the images (separated by coordinate directions).