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Method and apparatus for detecting gear defects

  • US 4,931,949 A
  • Filed: 03/21/1988
  • Issued: 06/05/1990
  • Est. Priority Date: 03/21/1988
  • Status: Expired due to Term
First Claim
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1. A method for analyzing a gear system having at least two inter-meshing gears, comprising the steps of:

  • sensing data signals produced by tooth-to-tooth contact in said gear system as said gears revolve, wherein at least some of said data is sensed by shaft encoders and wherein said data signals include signals from at least two top-dead-center pickup means for determining the unique angular orientation of each gear of said gear system;

    acquiring additional data from said system, including the number of teeth on each gear, the gear system configuration, and the given machine operating state;

    identifying from the combined data, which includes the additional data and the data signals, the relative angular orientation of the gears in said system and the data generated at said orientation; and

    analyzing the combined data to compute gear system vibrational characteristics.

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