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Method for detecting structure-borne noise events in a roller bearing

  • US 20060150737A1
  • Filed: 01/23/2004
  • Published: 07/13/2006
  • Est. Priority Date: 01/31/2003
  • Status: Active Grant
First Claim
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1. A method for detecting structure-borne sound events in a roller bearing, comprising supplying a measurement signal (M) from a pressure-sensitive or strain-sensitive sensor which is arranged on a roller bearing to a frequency filter for filtering out undesirable signal components;

  • calculating a first variance value from digital values of the frequency filter output signal;

    determining at least one second variance value from further digital values of the frequency filter output signal;

    calculating a weighted arithmetic mean of the first and second variance values from the at least two variance values using a recursive calculation, and assessing any exceeding of the weighted arithmetic variance mean value above a preselected variance threshold value (VSW) as a structure-borne sound event which has been caused by mechanical damage to the roller bearing, and the frequency for exceeding the threshold can be associated with the point of origin of the damage in the bearing when a rotation speed and geometric conditions of the bearing are known.

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