Combinaton of Multiple Stereo Systems

Parallel use of stereo systems

Apply­ing mul­ti­ple sys­tems enables the enlarge­ment of the FOV and/or to increase the spa­tial res­o­lu­tion. Dif­fer­ent meth­ods are avail­able for com­bin­ing their results and coor­di­nates by the VIC soft­ware. A unique method with high­er accu­ra­cy than  onven­tion­al ones enables to com­bine any obser­va­tion direc­tions — in this exam­ple, side by side sys­tems (right image) — even with­out an over­lap of the FOV, which is required for the con­ven­tion­al stitch­ing method. This dou­bles the spa­tial resolution.



Flexibility in combination of multiple systems

Here, opposed sys­tems oper­ate at dif­fer­ent field of view ranges. Click for the high-res­o­lu­tion mea­sure­ment of prin­ci­pal strain ε1 and ε2 tak­en from the backside.








NIST (National Institute of Standards and Technology) using Vic-3D for digital image correlation (DIC)

NIST is using the Vic-3D dig­i­tal image cor­re­la­tion (DIC) sys­tem to ana­lyze stress in bridges. By using DIC, they try to under­stand the impact of stress­es and strains on the met­al con­nec­tors of bridges in order to avoid dam­age or failure.

NIST is pre-strain­ing a wide plate with dig­i­tal image cor­re­la­tion (DIC) to deter­mine the small-scale spec­i­men sec­tion­ing plan:

NIST is con­duct­ing a CWP test with dig­i­tal image cor­re­la­tion (DIC) to deter­mine local and remote strains used to deter­mine the Ten­sile Strain Capac­i­ty of a flawed pipe girth-weld:

NIST is mak­ing an SE(T) test with dig­i­tal image cor­re­la­tion (DIC) show­ing the asym­met­ric strain gra­di­ent of a spec­i­men notched in the heat-affect­ed zone:

DIC measurements on structural concrete

The ETH Zürich — one of our long­stand­ing cus­tomers — pro­vides on the fol­low­ing web­site their research project. They ana­lyze the accu­ra­cy of dig­i­tal image cor­re­la­tion with­in the scope of rein­forced con­crete. Prof. Dr. Wal­ter Kauf­mann and Dr. Jaime Mata Fal­cón are mem­bers of the project.


Full-field strain mea­sure­ment in rebar tension 

test: fail­ure phase.