Patent ID: 9200980
Filing Date: 2015-12-01
Classification: G01H,G01M

Abstract:
1. An apparatus for analysing the condition of a machine having a part rotating with a speed of rotation, comprising: a first sensor adapted to generate an analogue measurement signal dependent on mechanical vibrations emanating from rotation of said part; an analogue-to-digital converter for sampling said analogue measurement signal at a sampling frequency so as to generate a digital measurement data signal in response to said analogue measurement signal; a filter adapted to generate a filtered digital data signal dependent on said digital measurement data signal; a digital rectifier adapted to generate a rectified signal dependent on said filtered digital data signal; a first decimator for performing a decimation of the rectified signal so as to achieve a first digital signal having a first reduced sampling frequency; said first decimator including low pass filtering; a fractional decimator, said fractional decimator having an evaluator adapted to perform a condition analysis function for analysing the condition of the machine dependent on said second digital signal.