The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 14, 2003
Filed:
Feb. 05, 2001
Josef Schalk, Altheim, DE;
Stefan Sassen, München, DE;
Wilhelm Ficker, Pöring, DE;
Konrad Lentner, Mintraching, DE;
Eads Deutschland GmbH, Munich, DE;
Abstract
A device for determining the frequency and/or the amplitude of a vibrating structure includes a vibrating element ( ) and a pair of position sensors ( ) for the determination of the deflection of the vibrating element ( ). The position sensors ( ) are arranged such that their measurements during a half-wave of vibration exceed and/or are less than one another. A comparator compares the measurements of the two position sensors ( ) to determine a threshold value U for the half-wave of the vibration at which their measurements are equal. A device is used for determining the duration during which the measurement of one of the two position sensors ( ) exceeds or is less than the threshold value U . The position sensors ( ) can be capacitors whose electrodes are arranged in a step-like manner. The determination of the amplitude of the vibration is, carried out independent of a potential parallel shift of the movable element ( ), such that there is no distortion of the measurement result.