APPLICATION OF ACOUSTIC EMISSION FOR CONTROLLING TECHNOLOGICAL PROCESSES IN MACHINE PART MANUFACTURE

Abstract

Prospects of introducing a universal operative diagnostic method of materials, technological processes of machine part manufacture and of their service conditions is discussed. The method is based on the phenomenon of acoustic emission accompanying practically all dynamic processes in materials. The principles of interpreting acoustic emission, utilizing the relationship between the statistic characteristics of the processes and the spectral properties of emission are discussed. An apparatus for receiving and analyzing acoustic emission signals is described. It is based on the separation of spectra components, their transformation into digital shape and further processing by computer. A short survey of experimental studies wit acoustic emission is given.