Abb Inc.

Abb Automation Gmbh

Anthony M DiTommaso

Kevin Dowdell

Ljubisa Milojevic

William J Kline

Michael J Kleya

A sampled data system for computing the amplitude of a signal received from a vibration sensing probe minus the fundamental frequency associated with the running speed of a rotating machinery shaft. This signal is known as the Not 1X waveform and variations in its amplitude can signal problems with bearings, rotors, cracks or mechanical looseness, and/or fluids of the rotating machine. The amplitude of the Not 1X waveform can be provided in either peak to peak amplitude, peak amplitude, absolute average or root mean square.

Method and apparatus for calculating the amplitude of a complex waveform associated with a rotating machine shaft after removing the running speed frequency

A method and apparatus for analyzing and signal conditioning the pulsation signal derived from combustion of fuel in a turbine. There are one or more user defined frequency bands and the method and apparatus provides a digital signal for the true RMS value of each of the user defined bands. Turbine protection logic has as its input the digital true RMS values for each such band and inspects that value to determine if the frequencies in that band exceed a predetermined level for a predetermined period of time.

Growing community of inventors

Cranberry Township, PA, United States of America

Anthony M DiTommaso