The method for automatic detection of defects in injection pumps high pressure by analysis of acoustic noise.

摘要

Method for automatically detecting defects in injection pumps high pressure by analysis of acoustic noise, to detect a particular type of defect known as follows: # - a discrete signal amplitude acoustic noise is acquired by a microphone issued -; by pump # a numeric value F equals the discrete integration of f [m] between L and U, which is calculated: #f [m] is a discrete Fourier transform of the discrete signal acquired; L and U are frequency values ​​lower and upper preset and specific to the particular type of defect; # - F is compared with an upper threshold FMAX obtained from calibration tests already performed in pumps without defects and pumps with the type particular default, so that if F is higher than FMAX the pump has said particular type of defect.