Synthesized synchronous sampling and acceleration enveloping for differential bearing damage signature
First Claim
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1. A method of detecting differential bearing damages, the method comprising:
- providing a synthesized tachometer configured to generate a speed signal for a differential bearing assembly such that the speed signal corresponds to the approximate location of a missing tachometer signal based on race speeds of the differential bearing assembly;
providing a sampling mechanism configured to synchronously sample vibration data associated with the differential bearing assembly based on the speed signal to generate synthesized cycle domain data corresponding to at least one damage signature there from;
causing rotation of the differential bearing assembly and generating a plurality of speed signals for inner and outer rotating bearing races in response to the rotation;
synthesizing a missing tachometer signal corresponding to the speed difference of the inner and outer races via the synthesized tachometer based upon the plurality of speed signals;
synchronously sampling bearing vibration data of the differential bearing assembly via the sampling mechanism in response to the synthesized speed difference tachometer signal to generate synthesized cycle domain data corresponding to at least one bearing damage signature of the differential bearing; and
displaying a spectrum of resultant differential bearing damage signatures in the order domain on a graphic display device in response to the synthesized cycle domain data.
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Abstract
A system for detecting differential bearing damages includes a synthesized tachometer that generates a tachometer signal corresponding to the race speed difference of a bearing assembly such that the bearing damage speed difference dependency can be eliminated and the damage features can be enhanced. The system also includes acceleration enveloping in the cycle domain to further enhance the damage signatures.
34 Citations
23 Claims
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1. A method of detecting differential bearing damages, the method comprising:
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providing a synthesized tachometer configured to generate a speed signal for a differential bearing assembly such that the speed signal corresponds to the approximate location of a missing tachometer signal based on race speeds of the differential bearing assembly; providing a sampling mechanism configured to synchronously sample vibration data associated with the differential bearing assembly based on the speed signal to generate synthesized cycle domain data corresponding to at least one damage signature there from; causing rotation of the differential bearing assembly and generating a plurality of speed signals for inner and outer rotating bearing races in response to the rotation; synthesizing a missing tachometer signal corresponding to the speed difference of the inner and outer races via the synthesized tachometer based upon the plurality of speed signals; synchronously sampling bearing vibration data of the differential bearing assembly via the sampling mechanism in response to the synthesized speed difference tachometer signal to generate synthesized cycle domain data corresponding to at least one bearing damage signature of the differential bearing; and displaying a spectrum of resultant differential bearing damage signatures in the order domain on a graphic display device in response to the synthesized cycle domain data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of enhancing a differential bearing damage signature, the method comprising:
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providing a synthesized tachometer configured to generate a speed signal for a differential bearing assembly such that the speed signal corresponds to the approximate location of a missing tachometer signal based on race speeds of the differential bearing assembly; providing a sampling mechanism configured to synchronously sample vibration data associated with the differential bearing assembly based on the speed signal to generate synthesized cycle domain data corresponding to at least one damage signature there from; causing rotation of the differential bearing assembly and generating a plurality of speed signals for each differential bearing race in response to the rotation; synthesizing at least one missing tachometer signal for at least one differential bearing race via the synthesized tachometer based upon the plurality of speed signals; synchronously sampling vibration data of the differential bearing assembly with respect to race speed differences via the sampling mechanism in response to the plurality of speed signals and the at least one synthesized tachometer signal to generate synthesized cycle domain data corresponding to at least one bearing damage signature; and displaying a spectrum of resultant differential bearing damage signatures in the order domain on a graphic display device in response to the synthesized cycle domain data. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17)
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18. A system for detecting differential bearing damage, the system comprising:
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a synthesized tachometer configured to generate a speed signal for a differential bearing assembly such that the speed signal corresponds to the approximate location of a missing tachometer signal based on both inner and outer race speeds of the bearing assembly; a sampling mechanism configured to synchronously sample vibration data associated with the differential bearing assembly based on the speed signal to generate synthesized cycle domain data corresponding to at least one differential bearing assembly damage signature; and a graphic display device configured to display a spectrum of resultant differential bearing damage signatures in the order domain in response to the synthesized cycle domain data. - View Dependent Claims (19, 20, 21, 22, 23)
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Specification