METHOD OF CONTROLLING TECHNICAL CONDITION OF THE CAR Russian patent published in 2018 - IPC G01N19/08 G01M15/00 

FIELD: defectoscopy.

SUBSTANCE: invention relates to non-destructive testing of elastic solids by acoustic methods, namely to methods of monitoring the technical state of machines (power mechanical equipment), and can be used for diagnostics of mainly all types of rotating power-mechanical equipment, including gas-pumping units, turbo-aggregates, pumps, compressors, fans, transmissions driven by an electric motor, an internal combustion engine, etc. In the method of monitoring the technical condition of a machine, a machine operating under load measures the parameters of natural oscillations of its structural elements, judging by the presence of natural oscillations about the appearance of defects. In this case, the parameters of polyharmonic oscillations of the structural elements of the machine are measured, on the constructive data of the product and its kinematic scheme produce a mathematical model of rotating equipment through a computer program, calculate the natural frequencies of the torsional oscillations of the shaft line and the parameters of their description (energy forms, kinetic and potential energy spectra). Then periodically compute the calculated parameters of natural frequencies with experimental information (vibration spectra) based on the parameters of polyharmonic oscillations and failure statistics, by the presence of natural oscillation frequencies in the experimental vibration spectra, the fact of the appearance of defects in the structure is fixed. By the combination of the experimental levels of the spectral components of vibration and the calculated levels of energy capacity of parts in the energy forms and spectra of kinetic and potential energies of the machine receive the result of the object's control as a kind of its technical state with indication of the location, type and causes of the defects.

EFFECT: establishment the fact of the presence of defects and the determination of their location with an accuracy to the next communication node in structurally complex systems; ensuring early detection of defects, their type and causes of occurrence by simplifying the allocation of the vibration signal due to the presence of a malfunction, determination of the most probable places of occurrence of defects at natural frequencies of oscillations of structural elements of machines related to structurally complex systems.

1 cl, 11 dwg, 3 tbl