Determination of quality and storage-time of dielectric mixtures using time domain spectroscopy
Other literature type
(issn: 1684-9973, eissn: 1684-9973)
This paper presents a novel approach for determining
certain material properties from permittivity measurements.
It does not rely on physical models and mixture
formulas. Instead, the reflection time domain response of the
material to a step impulse is evaluated in a narrow time window
near the steepest ascent of the pulse. A dedicated time
domain spectrometer is introduced, which records the data.
Principal components are derived directly from the time domain
data. The most significant principal components are
used to establish a principal component regression formula
for prediction of the required material properties. The viability
and accuracy of the method is demonstrated by applying
it to measurements of the storage time of some chilled fish