Patent ID: 7819012
Filing Date: 2010-10-26
Classification: G01H

Abstract:
1. A vibration measuring system for measuring mechanical vibrations, comprising: a transmitting assembly capable of being excited by a excitation signal to mechanically oscillate at an excitation frequency a receiving assembly capable of being excited by a carrier signal to oscillate at a carrier frequency and having a resonance frequency, wherein the transmitting assembly, when excited, applies to the receiving assembly a force which depends on an excursion of the transmitting assembly and modulates the amplitude of the carrier signal depending on the excursion of the transmitting structure, wherein at least one of the carrier frequency and the resonant frequency of the receiving structure is adjusted so that the resonant frequency essentially corresponds to a sideband of the amplitude-modulated carrier signal, and wherein the receiving assembly is capacitively coupled to the transmitting assembly, and an AC voltage having the carrier frequency is applied between the receiving assembly and the transmitting assembly.