Characterisation of shock absorber deformation by optical surface digitisation

Abstract

The performance of shock absorbers has been tested in specific regulatory drop tests onto an unyielding target at the BAM drop test facility. Optical surface digitisation methods have been used to measure, analyse and evaluate permanent deformations of shock absorbers more systematically. The measurement principle of the used fringe projection technique and its technical application to shock absorber investigations is explained in detail. Furthermore, examples of shock absorber testing results as well as final data visualisation are given in the present paper.

4.2 - Optical 3D Methods in Steel Sheet Container Drop Test Analysis

“…Furthermore, the complete 3D container shapes before and after the drop tests have been determined applying the optical measurement Fringes Projection Method. It was combined with Close Range Photogrammetry in this rather large volume to get the digital all around surface shape data with high precision [4]. Hence, further on the main focus is on qualification and data analysis of these optical measurement methods.…”

“…The fringe projection method is in a sense already used as a standard approach for shape or deformation documentation and analysis in drop tests at BAM [4]. This full-field surface measurement method is applied before and after container deformation caused by drop impact.…”