Apparatus for analysing the condition of a machine having a rotating part
First Claim
1. An apparatus for analysing the condition of a machine having a part rotating with a speed of rotation, comprising:
- an input for receiving a first digital signal dependent on mechanical vibrations emanating from rotation of said part;
a peak detector coupled to said input, said peak detector being adapted to detect peak values in said received first digital signal;
a burst rejector adapted to deliver output peak values on a burst rejector output in response to said detected peak values;
means for receiving burst rejector output peak amplitude values that have been collected during a finite time period, said finite time period corresponding to a certain amount of revolution of said rotatable part;
said certain amount of revolution corresponding to more than one revolution of said monitored rotatable part;
means for sorting said received burst rejector output peak amplitude values into a plurality of amplitude ranges so as to reflect occurrence of detected peak amplitude values within said plurality of amplitude ranges; and
means for estimating a representative peak amplitude value in dependence on said sorted peak amplitude values and said certain amount,wherein said burst rejector is adapted to control the delivery frequency of said output peak values such that said output peak values are delivered at a delivery frequency of fes,wherein fes =e * f ROT,wherein fROT is said speed of rotation, andwherein e is a factor having a predetermined value.
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Abstract
A method of operating an apparatus for analysing the condition of a machine having a part rotating with a speed of rotation, includes receiving a first digital signal dependent on mechanical vibrations emanating from rotation of the part, analyzing the first digital signal so as to detect peak amplitude values during a finite time period, the finite time period corresponding to a certain amount of revolution of the part, the certain amount of revolution corresponding to more than one revolution of the monitored rotatable part, defining amplitude ranges, sorting the detected peak amplitude values into corresponding amplitude ranges so as to reflect occurrence of detected peak amplitude values within the plurality of amplitude ranges, and estimating a representative peak amplitude value in dependence on the sorted peak amplitude values and the certain amount.
62 Citations
16 Claims
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1. An apparatus for analysing the condition of a machine having a part rotating with a speed of rotation, comprising:
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an input for receiving a first digital signal dependent on mechanical vibrations emanating from rotation of said part; a peak detector coupled to said input, said peak detector being adapted to detect peak values in said received first digital signal; a burst rejector adapted to deliver output peak values on a burst rejector output in response to said detected peak values; means for receiving burst rejector output peak amplitude values that have been collected during a finite time period, said finite time period corresponding to a certain amount of revolution of said rotatable part;
said certain amount of revolution corresponding to more than one revolution of said monitored rotatable part;means for sorting said received burst rejector output peak amplitude values into a plurality of amplitude ranges so as to reflect occurrence of detected peak amplitude values within said plurality of amplitude ranges; and means for estimating a representative peak amplitude value in dependence on said sorted peak amplitude values and said certain amount, wherein said burst rejector is adapted to control the delivery frequency of said output peak values such that said output peak values are delivered at a delivery frequency of fes, wherein fes =e * f ROT, wherein fROT is said speed of rotation, and wherein e is a factor having a predetermined value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification