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Acoustic Signatures Reveal Railway Bearing Defects

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Charles Murray
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Great idea
Charles Murray   11/13/2012 6:24:32 PM
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This is an important step forward. Bearing hot boxes have been used forever. I can remember them being used in the '70s, and they were mostly good for spotting existing problems, rather than heading off potential issues.  

tekochip
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Re: Sonar?
tekochip   11/13/2012 6:23:29 PM
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I read this as being similar to a glass break sensor in an alarm system.  The sensor is listening for a particular acoustic signature.

Cabe Atwell
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Sonar?
Cabe Atwell   11/13/2012 6:15:03 PM
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I wonder how this is done, exactly. Sound is applied, and the resulting frequency is measured. If it doesn't match the freq tolerance range, the wheel is rejected? Or, can the sound sensing locate the actual flaw? Like a sonar technique.

I used to know a few people that repaired industrial equipment, including train wheels. Mostly welding fractures or breaks back together. How would repairs work with this system. It almost seems like a waste to throw out a whole wheel.

C

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