Quantitative imaging technical platform

Controlled and synchronized vision system

The image and signal acquisition system analyzes mechanical tests on different materials. The typical example is a tensile test on a flat specimen, with measurements of displacements and temperatures of points on the surface of the material.

The system allows:
- synchronously record images from two 1MPx monochrome cameras at 300Hz, and a FLIR X6540sc infrared camera between 10Hz and 200Hz,
- synchronously acquire signals from force and displacement sensors (8 channels minimum),
- using software, to configure the tests, record the sequences and play back videos including reading of the digitized channels. Images should be provided in a raw format for digital processing within the team.

A white light source can illuminate samples of various sizes (approximately 200 by 200 mm2). The system allows the use of other camera references and is open to developments: piloting two additional cameras at a lower acquisition frequency and increasing recording capacity.

 

Instron

The system has stress frequencies greater than or equal to 100 Hz. A dynamic force of 2000 N and a static force and more than 700 N in tension. A minimum cylinder stroke of 60 mm. A force and torque sensor with optimum precision over the measuring range. A dynamic / static torque of ± 25N.m minimum An imposed angle of ± 135deg minimum with the possibility of locking the jack. Piloting software allowing data acquisition, taking care of fatigue imposed by different signals, compression, 3-point bending, traction, creep / relaxation (optional), with a tutorial in French. Included are compression plates, 3-point flexion device, traction jaws.

Extended black body

The extended black body is used to calibrate the FLIR X6540sc thermal camera in our possession.

The characteristics are:
    • Extended surface of 300 mm by 300 mm minimum.
    • Temperature range in absolute mode from approximately 0 ° C to approximately 150 ° C.
    • Electronic blackbody piloting system.
    • Encryption of an option to operate in differential mode.

Extended black body

Dynamical Mechanical Analyser

The experimental setup is a « home-made » Dynamical Mechanical Analyser » (DMA) . It is devoted to the analysis of viscoelastic properties of glass fibers from low (1 Hz) to very low (5.10-6 Hz) frequencies. This setup has been designed and interfaced at the IPR, in order to obtain an experimental setup with unparalleled performance in terms of resolution, particularly at low frequencies. The DMA is mainly made of an active anti-vibration table (to filter all partial vibration), a rotating actuator (to impose torsion to fibers) with a resolution of 0,0001° (3.10-5 % of the travel range used) and a torque sensor (designed for precision watchmaking) with a resolution better than 1 mN.m (0,1% of the scale used). A laser with optical devices have been added to the setup in order to irradiated chalcogenide glass fibers, to investigate their photoinduced viscoelastic behavior. A computer and a data acquisition card allow to control the experimental setup, acquire and process data in real-time.

Dynamical Mechanical Analyser