Patent ID: 7069154

Claim:
A method for detecting and automatically identifying defects in technical equipment, wherein measurement signals varying with time are measured by means of a known measuring device, and the results of the measurements in the form of spectrograms are downloaded to the memory of a computer, to which appropriate data bases are also downloaded, characterised in that in the first stage peaks of amplitude values bigger than a specified set amplitude threshold value are selected from at least one spectrogram, of which peaks a set of designated peak values is created, then the ratio of the frequency of each peak to the frequency of the other peaks is calculated for all peaks of this set, whereupon, depending on the value of the obtained quotient, the set of designated peak values is divided into two subsets, and then in the second stage in one of the subsets successive specific peak groups are distinguished, which differ from each other by the values of the basic frequency, constituting one of the product factors, consistently recurring in one of these groups, whereupon for peaks from every specific peak group the presence of sidebands is sought for in the second subset created from the set of designated peak values and if the presence of sidebands is found, the basic frequency of the sidebands is calculated, after which, in stage three, the presence of a defect in the technical equipment is detected, which is then identified by comparing the basic frequencies and the basic frequencies of the sidebands with the frequency values collected in the computer device memory, in the data signature base and in the base containing technical data of the technical equipment, and then the result of such analysis of the spectrogram or spectrograms is presented by means of a results visualisation device coupled with the computer device.