Capacitive Measuring Circuit for Yarn Inspection
AssigneeUster Technologies AG
InventorsReto Gehrig, Phillipp Ott, Rolf Joss
Life of this patent
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Abstract
A measuring circuit used for the capacitive examination of a moving elongated textile test material such as card sliver, roving, yarn or woven fabric, having a measuring capacitor for accommodating the test material, and a component with a capacitance which can be changed by an electric control signal. The measuring circuit can thus be balanced in a simple, rapid, cost-effective and especially automatic way.
Claims20
A capacitive measuring circuit (1), comprising a capacitor arrangement (2, 21) to be measured and at least one component (3, 31, 32) with a variable capacitance, characterized in that the at least one variable capacitance (3, 31, 32) is changeable by at least one electric control signal (71, 72).
A measuring circuit (1) according to one of the preceding claims, wherein the measuring circuit (1) contains two components (31, 32) with capacitances which are changeable by at least one electric control signal (71, 72).
An apparatus for the capacitive examination of a moved elongated test material (9), containing a capacitive measuring circuit (1) with a measuring capacitor (21) for accommodating the test material (9) and at least one component (3, 31, 32) with a variable capacitance, characterized in that the measuring circuit (1) is a measuring circuit according to one of the preceding claims.
Dependencies are inferred from the claim text.