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Full Field and Non Destructive Testing (NDT) of
Quality, Strain and Vibration
The permanent increasing requirements of product quality
demand for updated and more effective methods of testing and
analysis. The measuring method requires to be used on-line, full
field, nondestructive and without contact. For solving such
problems whole field interferometric laser optical methods are
predetermined. Their sensitivity and accuracy are very high but
they are sensitive as well against environmental disturbances
like thermal air waves or lower frequency vibrations and
therefore they are not suited for application in production
lines.
The laboratory for photoelasticity, holography and
shearography Lab (SHS) in the design institute IMK, Dept. ME,
University Gh Kassel has developed and manufactured a compact and
versatile measuring unit for testing quality and analysing
strains and vibrations which is relatively insensitive against
external disturbances compared with holographic interferometry
(ESPI). The shearographic measuring device is characterised by
its simple set-up and gets over the above mentioned obstacle for
applying the whole field measuring laser optical method in
industry.
The following investigations show the universal applicable shearographic device
and developmental program ShearWIN
of the Lab (SHS) for
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