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Integrity test for acoustic bearing defect detector

  • US 5,029,477 A
  • Filed: 01/31/1990
  • Issued: 07/09/1991
  • Est. Priority Date: 01/31/1990
  • Status: Expired due to Fees
First Claim
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1. In an apparatus for monitoring bearings of a railway train for defects during operation of the train along a section of track said apparatus being of the type including train speed sensing means, means for transducing acoustic vibrations in said bearings into an electric signal, means for filtering the electric signal, and means for spectrum analyzing the electric signal, the improvement comprising means for automatically generating successive simulated characteristic acoustic signatures of various gearing defect types/bearing size/wheel diameter/train speed combinations and means for detecting expected alarm signals from said spectrum analyzing means in response to said simulated characteristic acoustic signatures.

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