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.

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.

Ravi Ranade

Test of a ECC (Engi­neered Cemen­ti­tious Com­pos­ites) Beam under 4‑point loading.

Ravi Ranade

DIC mea­sure­ment of a rec­tan­gu­lar ten­sile spec­i­men of High Vol­ume Fly Ash ECC, loaded along the hor­i­zon­tal axis.

The film shows a DIC Mea­sure­ment using Vic-3D on a con­crete beam dur­ing a three point bend­ing test. The first crack open­ing <1µm is locat­ed at the low­er right side of the beam.

Final con­di­tions: Over the entire length of the con­crete beam sev­er­al cracks have formed.

The cor­re­la­tion of an earthquakesimulation

was mea­sured with the Vic-sys­tem and high speed cam­eras.

Sev­er­al con­crete slap was stock­piled on

a shak­ertable for the exper­i­men­tal setup.