DEVICE AND PROCEDURE FOR THE EARLY DIAGNOSIS AND THE PREACHING OF DEFECTS IN OPERATING UNITS.

摘要

Device for early diagnosis and for the prediction of defects in the functional groups of a machinery installation, which comprises: - At least one sensor (1) to record the body sound of the machinery installation, which must be monitored , as well as for the emission of a measurement signal; - An analog / digital drive converter device (7) to convert the measurement signal into a digital measurement signal; - A digital signal processor (DSP) with a Fast Fourier Transformation Device (FFT) to carry out the transformation of the digital signal measuring the frequency range. This is an early diagnostic device that is characterized in that: - Within the digital signal processor (DSP), a cepstro analysis device is also provided to generate the digital measurement signal, once it has been transformed by the rapid transformation of Fourier, reference data of the individual shock impulses within the scope of time; and - within a memory unit (8) the cepstro-mother of a new machinery installation for different operating conditions is stored; the matrix of experience values, relative to the functional groups and the component parts of these with the defects; as well as the probable remaining useful life of them; In this case, the digital signal processor (DSP) makes a comparison between the current cepstro and a mother cepstro of a new machinery installation, which is read from the memory unit (8) and which is assigned to it. operating condition, being the same chosen in response to information on the number of revolutions and the machine load; - a monitoring and control device (10) is provided to monitor the result of the comparison - between the current cepstro and the corresponding cepstro-mother - with respect to the limit values being exceeded as well as to inform, where appropriate, the processor digital signals (DSP) on this excess in relation to the limit values; as well as - the digital signal processor (DSP) determines - in response to information from the monitoring and control device (10) and the current cepster as well as through the experience values, stored in the matrix of values of experience, and through the defects presented - a defective functional group or a defective component part of it as well as determines the probable remaining useful life of the same and then issue a signal to a central unit (9), for the purpose of further processing, of diagnosis in which information on the defective functional groups and on the probable remaining useful life of these are contained.