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QuintSonic 7
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with the QuntSonic 7. Please do also refer to section 6.2 “Limits to the measurement technique”
and section 10 “Application Examples” with hints on the procedure for some typical applications.
To assist for new measuring tasks or for inexperienced users, ElektroPhysik offers a parameter
setting service. Please send us your material sample. ElektroPhysik will make a cross section of
the same. One half of the sample will be used to analyse the layers of the coating system. The
other one will be used for taking readings by means of the QuintSonic 7. This way, an appropriate
parameter set can be determined along with the matching sound velocities. The parameter set
resulting from this service will be made available to the user.
8.2 Levels of Processing
The complete measuring and analysing cycle by QuintSonic 7 is done in a fully automatic
sequence. The procedure includes the following steps:
Measurement procedure
Signal processing algorithm sequence
Preprocessor sequence (preprocessing)
Optimisation sequence
Postprocessor sequence (postprocessing)
Calculation of layer thickness
The measuring procedure, signal processing-algorithm and the calculation of thickness sequence
cannot be influenced by the user. For that reason no further details will be given on this subject.
The preprocessing, optimisation and postprocessing sequence can be adapted to the measuring
task by adequate parameter setting. The type and effect of parameter setting will be explained
below in detail.
8.3 Preprocessing
8.3.1
General remarks
As described in section 7, a typical echo signal exhibits some portions of noise produced by
microscopically small inhomogeneities in the layers or in the base of the measuring object. The
preprocessor is designed to eliminate such unwanted signals from the echo signal. Its main
purpose, however, is to determine the positions and amplitudes of the individual echoes within the
complete echo signal. This procedure is referred to as “echo extraction”. In this context, the two
coupling echoes always located at the beginning of the echo signal occupy a special position.