PROCESS OF ACOUSTIC EMISSION CONTROL OVER TECHNICAL CONDITION OF PIPE-LINES Russian patent published in 2003 - IPC

FIELD: nondestructive inspection of technical state of pipe-lines by signals of acoustic emission. SUBSTANCE: process of acoustic emission control lies in placement of acoustic emission converters along length of pipe-line, in loading of pipe-line, in registration of signals of acoustic emission and in making judgment on degree of damage to pipe-line. Pipe-line is fitted with stationary acoustic emission converters, each converter being placed in tight protective case and pressed against body of pipe-line with calibrated force by means of pressure attachments that ensures maximum acoustic contact of acoustic emission converter with body of pipe-line through contact compound. Each converter is equipped with cable carrying connector on its end positioned in protective case and brought to ground surface through protective passage. Acoustic emission converter is commutated with preset periodicity with mobile hardware part of acoustic emission system. During first inspection acoustic signals can be recorded on information medium, for instance CD, and later can be used in comparison with ensuing measurements of acoustic characteristics of pipe-line. EFFECT: decreased cost of diagnostic acoustic emission system, enhanced authenticity of diagnostics of technical condition of pipe-line. 1 cl, 1 dwg