Patent ID: 8696321
Filing Date: 2014-04-15
Classification: F04D,F05D,G01N,Y10T

Abstract:
1. A system for detecting an occurrence of cavitation during operation of a fluid mechanism, comprising: an acoustic sensor; a bandpass filter for filtering a signal from the acoustic sensor, the signal comprising a plurality of frequencies and the filter cutting off all of the frequencies that are less than 1 MHz and passing all of the frequencies up to 5 MHz; a first detector for providing a signal indicative of an energy in the bandpass filtered signal from the acoustic sensor; a lowpass filter for filtering the signal from the acoustic sensor; a second detector for providing a signal indicative of the energy in the lowpass filtered signal from the acoustic sensor; a reference receiver for receiving a reference value signal, wherein the reference receiver is arranged to receive the signal from the second detector as the reference value signal; and a comparator for comparing the signal from the first detector with the reference value signal and providing an indication if the signal from the first detector exceeds the reference value signal.