METHOD OF ASSESSING DEGREE OF DESTRUCTION OF MATERIALS DURING ACOUSTIC EMISSION CONTROL OF FRICTION OF SOLID, LIQUID AND GASEOUS BODIES Russian patent published in 2020 - IPC G01N29/14 

FIELD: physics.

SUBSTANCE: use: to assess degree of destruction of materials during acoustic emission control of friction of solid, liquid and gaseous bodies. Summary of invention consists in the fact that for recording and conversion of acoustic pulses, a piezoelectric transducer with a frequency characteristic is used, which covers the natural frequencies of the acoustic pulses occurring when the materials used in the structure are destroyed, connected to a control computer equipped with a program for continuous recording of incoming signals; preliminary parameters of control pulses, which are typical for used materials, are determined for friction of solid bodies on special installation with rotary or reciprocating movement when applying different load on friction pair, and for liquid and gaseous bodies - on installation, allowing to pump body data along solid surface with different speeds and pressures; when monitoring the state of the structure using the parameters of the acoustic pulses, program means display the parameters of the pulses current for the given materials and bodies and compare them with the control ones; on the basis of this comparison, a conclusion is made on the state of the structure or the nature of the process.

EFFECT: technical result is considerable simplification and concretization of obtained data, as well as possibility of obtaining data on damages or value of noise in current mode.

1 cl, 5 dwg