Ours set-up is composed:
model EOS 1000 C
The DAQ consist
-1 NI-DAQ type PCI 6035E, 16 bit acquisition.
-2 SCXI-1122 modules, 16 channel isolated
trasduceer multiplexer module for signal conditioning.
-2 SCXI- 1322 terminal blocks consist of
a shielded board with 46 screw terminals for connection
to the 1122 input connector.
-1 SCXI chassis
-1 PC windows 98
-Lab Views program created by INFN of Bari for the acquisition
of temperature and deformations in real time on the
The selection of strain gauges and DAQ for thermal tests
in the climatic room of Terni has been performed in December
Measurements performed in the climatic room at the Material
Engineering Department (Perugia University),
Terni, by S.Allegretti and G.Scolieri.
The strain was measured by means of a quarter bridge
configuration as shown in the figure below:
The reference strain is realized using a strain gauge
glued to a quartz block, while the strain to measure is
located on an Al foil
The equation to calculate the strain is:
||Strain gauge gain factor;
||Excitation voltage of the Wheatstone
· VO(strained) is the measured voltage output
· VO(unstrained) is the initial, unstrained
||Nominal resistance value of strain
gauge in Ohm:
||Strain to measure;