Determining a dielectric property of a capacitor
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United States of America Patent
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Feb 17, 2015
Grant Date -
Aug 11, 2011
app pub date -
Oct 12, 2009
filing date -
Oct 16, 2008
priority date (Note) -
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Abstract
An apparatus for determining at least one dielectric property of a capacitor arrangement, and especially for capacitive examination of a moving elongated test subject such as yarn. It contains an alternating signal generator for applying an electric alternating signal to the capacitor arrangement. The capacitor arrangement is uncoupled from the alternating signal generator by means of an amplifier in such a way that it does not relevantly influence the basic frequency and the signal shape of the applied alternating signal. Detection means detect an electric measuring variable of an electric signal tapped from the capacitor arrangement. The alternating signal generator is set up in such a way that at least one of the basic frequency and the signal shape of the applied alternating signal can be changed.
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