TWS Michael Schulthes     
Technisch-Wissenschaftliche Software

At present TWS Michael Schulthes offers 2 systems for Complex Modulus Testing:

Test according to the method of Dr. Oberst

This test measures Loss-Factor and E-Modulus at steel strips covered with the damping material on one side. The strips are clamped to the Oberst Stand and excited at the free end using a magnetic exciter transucer. The vibration is measured using a inductive velocity transducer.

The system can measure up to 15 test strips simultaneously  within  5 minutes per temperature value. It uses either random noise or a sine sweep for excitation and performs all operations from setting the temperature until  storage of the results fully automatically. A low-cost program version supporting ordinary soundcards for PCs is also available.

One channel  Stand BSS 101                                    Two channel  Stand BSS 202

Test using the Reverberation Method on square plates  (SAE-Method, Peugeot Method)

When using this method a square plate is covered with the damping material unter test and excited at the first resonace using  a sine signal. Then the signal is switched off and the reverberatin curve is analysed.

This system works fully automatically too and has been designed for use with standard sound cards.