Patent ID: 11162869

Abstract:
A testing apparatus, method and system for determining the ovaling mode in a cylindrical object, which may be excited through the synchronous application of two diametrically opposed identical vibrators to the outer perimeter. At least one vibration sensor transforms the vibrations to electrical voltage signals. Two vibration sensors placed at diametrically opposed locations, each halfway between the vibration inducers, may be used with a summer for adding the in phase response signals. The signal response is then converted into a digital signal and transformed into the frequency domain through a Fourier transform for determining the frequencies of the modes of interest. The resonant frequency of the ovaling mode of the element is identified and compared to that of a reference cylindrical object with comparable cross-sectional size to establish the stiffness and soundness degree of the cylindrical object. A structural integrity report including the strength and stiffness is generated.