VIBRATION DIAGNOSTIC METHOD AND EQUIPMENT FOR BEGINNING OF FAILURE IN CONSTRUCTION ELEMENTS Russian patent published in 2008 - IPC G01N29/04 

FIELD: exploitation, diagnosis.

SUBSTANCE: firstly the location of possible failure of an element is determined based on the design details and experience of failure of similar structures. A vibration sensor is placed there and vibration is initiated on the control element from an independent vibration source, that can be placed on an part of the element. The accuracy of the sensor is determined and corrected by analysing vibration amplitude. The vibration frequency is measured and mutually analysed periodically at equal intervals and the moment at which any deviation is observed indicate the beginning of crack development. This is determined based on the dynamics of vibration dynamics change, rate of crack development and its indication.

EFFECT: ensuring authenticity and information on the moment of crack development and distribution dynamics.